A tiny crystal of table salt (NaCl) contains 950. billion formula units of salt. What is the mass of this crystal, in grams? Chemical Formula: Work: Calculated answer: Molar mass: # sig figs: Final answer with units:​

Answers

Answer 1

Answer:

29 ouns

Explanation:

it has 950 billion so it will be scaled in grams not kilograms


Related Questions

what volume did the methane gas occupy in the erlenmeyer flask before the syringe was attached to the flask?

Answers

When the gas syringe gets inserted into and attached to the Erlenmeyer flask which contains the methane gas, the gas expands and enters the gas syringe.

Charles law states that the volume which is occupied by an ideal gas is directly proportional to the absolute temperature at constant pressure conditions. It also sometimes known as the law of volumes as it also describes how gases are able to expand with increase in temperature.

When a syringe is inserted into the Erlenmeyer flask which contains the methane gas, some of that gas in the flask expands and enters into the syringe.

--The given question is incomplete, the complete question is

"What happens after the gas syringe is inserted into the Erlenmeyer flask containing the methane gas?"--

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___Ca2+ + ___O2 ---> Cr2O3

Answers

Answer:

Balancing chemical equations is my priority!! :-)

[tex]Ca_{2}[/tex] + [tex]O_{2}[/tex] = [tex]Ca_{2} O_{3}[/tex]

On both sides Calcium (Ca) is balanced ( 2 and 2 )

Then Oxygen (O) is 2 on the reactant side and 3 on the product side.

Divide the subscripts (product subscript/reactant subscript) to give 1.5 (3/2)

Because you can't put 1.5 in an equation you multiply everything by 2.

Then it comes [tex]2Ca_{2}[/tex] + [tex]3O_{2}[/tex] = [tex]2Ca_{2} O_{3}[/tex]

Have a wonderful day! :-)

An aqueous solution of hydrogen
peroxide, H₂O₂, decomposes to
form water and oxygen gas. Write
a balanced symbol equation,
including state symbols, for this
reaction.

When hydrogen peroxide
decomposes, what mass of
hydrogen peroxide is needed
in solution to produce 1.6g of
Oxygen gas?

Answers

According to the equation, hydrogen peroxide in aqueous solution breaks down upon heat to produce oxygen: 2H2O2(aq)→2H2O(l)+O2(g).

To make 1.6g of oxygen gas, 34g of hydrogen peroxide must be in solution.

equation:

2H2O2 —————— O2 to 2H2O mole ratio is 2: 2: 1 RMM of O2 - (16*2) = 32 RFM of H2O2 - (1*2) + (16*2) = 34

1 Mole of O2 in 32 g? 1.6 g 1.6/32 = 0.5 moles

0.5*2 = 1 MOLE OF H2O2 and 34*34 = 34 g.

A hydrogen's position.

It is mainly present in Jupiter, and is present in the sun and the majority of stars. Water is where hydrogen is found most frequently on Earth. It only occurs as a gas in the atmosphere at trace concentrations, less than 1 part per minute by volume.

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"A daisy is a non-flowering, seed-bearing plant, while a pine tree produces flowers. Both the daisy and the pine tree go through the four major stages of the life cycle, which includes the seed stage, sprouting stage, seedling stage, and the final stage, which is the adult stage. During each stage of the life cycle, the two plants have different shapes and textures. As adult plants, the daisy produces seeds in the cone, and the pine tree produces seeds in the flower."

What statement corrects the errors in Zander's passage? a .A daisy is a flowering plant, and a pine tree is a non-flowering, cone-bearing plant. During the adult stage, the daisy produces seeds in the flower and the pine tree produces seeds in the cone. b.As adult plants, the daisy sprouts seedlings, which are then reproduced. During the adult stage, the pine tree grows spores, which are reproduced. che daisy and the pine tree have different stages in their life cycles. The daisy completes the seedling stage before the sprouting stage. The pine tree has a fertilization stage when seeds are produced. d. The daisy and the pine tree both have the same life cycles, but the daisy produces seeds in the seedling stage, and the pine tree produces seeds in the sprouting stage

Answers

A daisy is a flowering plant, and a pine tree is a non-flowering, cone-bearing plant. During the adult stage, the daisy produces seeds in the flower and the pine tree produces seeds in the cone. So, the correct option is (A).

What are Cones in plants?

Cones are also called strobilus. It is oval in shape, containing the reproductive organs of some non-flowering plants. Cones have unique feature of pines and other conifers, also found on all gymnosperms, some club mosses and horsetails.

Male cones produce pollen that is carried by the wind to female cones, after which the female gametes are fertilized by male gametes from the pollen, the female cones produce seeds, which are then scattered away from the plant by wind or animals.

Thus, a daisy is a flowering plant, and a pine tree is a non-flowering, cone-bearing plant. During the adult stage, the daisy produces seeds in the flower and the pine tree produces seeds in the cone. So, the correct option is (A).

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What is the original concentration of a Sulfuric Acid Solution with a pOH of 12. 43??

Answers

The original concentration of the sulfuric acid solution is  0.0044

To find the original concentration of a sulfuric acid solution with a pOH of 12.43, you would need to use the relationship between the acidity of a solution and its pH. The pH of a solution is defined as the negative logarithm of the hydrogen ion concentration (pH = -log[H+]). The pOH of a solution is defined as the negative logarithm of the hydroxide ion concentration (pOH = -log[OH-]). Since the pH and pOH of a solution are related by the equation:

pH + pOH = 14

Given the pOH of 12.43, then you can calculate the pH as :

pH = 14 - pOH

pH = 14 - 12.43 = 1.57

The original concentration of the sulfuric acid solution is 10^(-pH)

[H+] = 10^(-1.57) = 0.0044.

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At stp, one mole of oxygen gas (o2) and one mole of neon (ne) contain:_____.

Answers

At stp one mole of oxygen gas and one mole of neon atom both have

6* [tex]10^2^3[/tex] molcules which is avagardo number of molecules.

what is STP?

STP stands for "Standard Temperature and Pressure." In chemistry, it is commonly used as a reference point to describe the properties of gases. STP is defined as a temperature of 0 degrees Celsius (273.15 K) and a pressure of 1 atmosphere (101.325 kPa). At these conditions, the volume of one mole of any gas is 24.45 L.

So one mole of all gas have avagadro number of molecules in it.

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for which principle of relative age is the grand canyon a clear example?

Answers

Answer: 1,840 million years old.

Explanation:

Which atom gives up its electrons most easily?



Answers

Cesium will give up the most electrons due to low ionization

what type of intermolecular force forms during the solvation process when a polar molecule like of2 dissolves in water?

Answers

Interactions between ions and dipoles. Ion-Dipole Forces were engaged for solutions in which an ionic chemical is immersed in a polar solvent, for example a table salt (NaCl) water solution.

Ion-dipole intermolecular forces seem to be electrostatic reactions between such a polar molecule as well as an ion that are frequently caused by the dissolution of ionic compounds within polar substances. The attraction here between the negative ends of one polar molecule as well as the positive ends of another polar molecule is known as dipole-dipole forces.

In polar solvents, polar molecules were also soluble (Predominant intermolecular force will be a dipole-dipole attraction between polar solute molecule as well as polar solvent molecule).

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an aqueous sodium acetate, nac2h3o2 , solution is made by dissolving 0.195 mol nac2h3o2 in 0.750 kg of water. calculate the molality of the solution.

Answers

The molality of  solution is 0.26 mol/kg

Molality is defined as "The ratio of the number of moles of solute present in a solution to the mass of the solvent in kilograms".

The unit that is used to represent molality is mol/kg.

The formula used to calculate molality is given below:

Molality = moles of solute/ mass of solvent in kg-----> (i)

Here,

Given values:

Moles of NaC₂H₃O₂ (solute) = 0.195mol

Mass of solvent (water) = 0.750 kg

Putting these values in equation (i), we get-

Molality

= 0.195 mol/0.750 kg

=0.26 mol/kg

Hence, the molality of  solution is 0. 26 mol/kg

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CARBOHYDRATES WORKSHOP

Answers

Cx(H2O)y is the general formula for carbohydrates. Carbohydrates are the carbon hydrate in its natural form.

Which of the three carbohydrate structures are they?Three subtypes of carbohydrates—monosaccharides, disaccharides, and polysaccharides—are recognized in the literature.Cx(H2O)y is the general formula for carbohydrates. Carbohydrates are the carbon hydrate in its natural form. In the same ratio as water, they are composed of hydrogen and oxygen. It should be noted that not all carbohydrates follow the rule Cx(H2O)y. For instance, 2-deoxyribose C5H10O4 does not follow the rule.The four main categories of carbohydrates are monosaccharides, disaccharides, oligosaccharides, and polysaccharides, depending on the degree of polymerization.Only molecules of carbon, hydrogen, and oxygen make up the organic compounds known as carbohydrates.

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Question 1: How many molecules are there in 67g of CO2?

Question2: What is the mass of 3.01 x 1023 atoms of FeO? Round to two decimal places.

Question3: If a sample contained 9.65 x 1023 atoms of iodine, how many grams would this be? Round to one decimal point.

Answers

1. The number of molecules in 67g of CO2 can be calculated using the molar mass of CO2, which is 44.01 g/mol. To find the number of molecules, we divide the mass of CO2 (67g) by the molar mass of CO2 (44.01 g/mol). This gives us: 67g / 44.01 g/mol = 1.52 x 10^23 molecules of CO2.

2. The mass of 3.01 x 10^23 atoms of FeO can be calculated using the molar mass of FeO, which is 71.847 g/mol. To find the mass, we multiply the number of atoms (3.01 x 10^23) by the molar mass of FeO (71.847 g/mol). This gives us: 3.01 x 10^23 atoms * 71.847 g/mol = 217.31 g

3. To calculate the mass of 9.65 x 10^23 atoms of iodine, we can use the molar mass of iodine, which is 126.904 g/mol. To find the mass, we multiply the number of atoms (9.65 x 10^23) by the molar mass of iodine (126.904 g/mol). This gives us: 9.65 x 10^23 atoms * 126.904 g/mol = 1218.56 g rounded to one decimal point.

PLS HELP WITH CHEMISTRY 19! PLS

ANSWER ALL SQUARES

Answers

2,1,2 that’s the answer giggity

Balance C2H4 + O2 = CO2 + H2O using the algebraic method.

Answers

Answer: C₂H₄ + 3O₂ --> 2 CO₂ + H₂O is the balanced equation

Explanation:

First, the Carbon atoms are balanced. After balancing the equation becomes:

C₂H₄ + O₂ --> 2 CO₂ + H₂O

Then the Hydrogen atoms are balanced. After balancing the equation becomes:

C₂H₄ + O₂ --> 2 CO₂ + 2H₂O

Finally, Oxygen atoms are balanced. After balancing the equation becomes:

C₂H₄ + 3O₂ --> 2 CO₂ + H₂O

Thus, the balanced equation is C₂H₄ + 3O₂ --> 2 CO₂ + H₂O

I hope this helps! :)

which gas is not an example of a naturally occurring greenhouse gas?

Answers

nitrogen and chloro fluro carbon gas is not an example of a naturally occurring greenhouse gas

Water vapour, carbon dioxide, methane, nitrous oxide, and ozone are examples of naturally occurring greenhouse gases. Hydro-fluorocarbons (HFCs), perfluorocarbons (PFCs), and sulphur hexafluoride (SF6) are examples of artificial greenhouse gases that are produced via a number of industrial operations. Carbon dioxide, methane, ozone, nitrous oxide, chlorofluorocarbons, and water vapour are some examples of greenhouse gases. The gas that is not a greenhouse gas is therefore nitrogen. The different greenhouse gases include nitrous oxide, water vapour, ozone, chlorofluorocarbons, methane, and chlorofluorocarbons. Infrared light cannot pass through oxygen or nitrogen, hence they are not considered greenhouse gases. These molecules are invisible because stretching one of them has no effect on the electric field. These symmetric molecules are composed of two identical atoms whose electric fields simply cancel one another out.

which gas is not an example of a naturally occurring greenhouse gas?

1. nitrogen

2.cholrofluoro carbons

3. oxygen

4. carbondioxide

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If a sample of metal has a
mass of 45.9g and occupies
a volume of 17.0 mL. What
is the metal if:
Copper-8.96 g/cm³
Aluminum = 2.70 g/cm³
Iron = 7.86 g/cm³

Answers

The identity of the metal that has a mass of 45.9g and volume or 17.0mL is aluminium (2.7g/mL) (option B).

How to calculate density?

Density is the measure of the mass of matter contained by a unit volume. The density of a substance can be calculated using the following formula;

Density = mass ÷ volume

According to this question, if a sample of metal has a mass of 45.9g and occupies a volume of 17.0 mL, the density can be calculated as follows:

Density = 45.9g ÷ 17.0mL

Density = 2.7g/mL

Therefore, the identity of the metal is aluminium with a density of 2.7g/mL.

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What is the formula for this ionic crystal ?

Answers

Answer:

ZnS

Explanation:

Because there are two tetrahedral holes per anion (sulfide ion) and one-half of these holes are occupied by zinc ions, there must be 1 2 1 2 × 2, or 1, zinc ion per sulfide ion. Thus, the formula is ZnS. Check Your Learning

Suppose that you run a reaction in ethanol to form a very non-polar organic substance. How would you extract your product?
Select one:
a- After the reaction is complete, add water and ethanol to a separatory funnel and separate the layers.
b- After the reaction is complete, rotovap the ethanol and redissolve in suitable organic solvent and water followed by separation.
c- After the reaction is complete, add suitable organic solvent and water followed by separation.
d- There is more than one correct answer.

Answers

b- After the reaction is complete, rotovap the ethanol and redissolve in suitable organic solvent and water followed by separation . This is the correct option.

If the desired product is a non-polar organic substance and it is formed in a reaction run in ethanol, one way to extract the product would be to use liquid-liquid extraction method. The basic idea of this method is to use a solvent that is immiscible (i.e., does not mix well) with both the reaction mixture and the desired product.

Here are the general steps for a liquid-liquid extraction:

• Separate the reaction mixture into two layers, the aqueous layer and the organic layer, by using a separating funnel.

• Remove the aqueous layer and discard it.

• Take the organic layer, containing the desired product and ethanol and add a non-polar solvent, such as pentane, hexane, or diethyl ether to the organic layer.

• Shake the mixture vigorously to allow for the transfer of the desired product from the ethanol to the non-polar solvent.

• Separate the two layers by using a separating funnel.

• Remove the upper non-polar solvent layer, which should contain the desired product

• Dry the non-polar solvent layer if necessary, and evaporate the solvent if desired to isolate the pure product.

Note that the choice of the solvent and the specific steps may vary depending on the nature of the product and the reaction mixture.

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Help me out please :)

Answers

Answer:

The strength of the forces holding the particles of a substance together determines its physical state at a given temperature. The stronger the forces the more energy required to overcome them and hence the particles remain in a fixed position and the substance is solid, while weaker forces may allow the particles to move freely making the substance a gas.

Explanation:

In the case of carbon dioxide (CO2), the particles are held together by weak van der Waals forces. These forces are not strong enough to keep the particles in a fixed position, so they are able to move freely and take on the properties of a gas at room temperature.

In the case of water (H2O), the particles are held together by hydrogen bonds. These bonds are stronger than the van der Waals forces in CO2, so the particles are not able to move as freely. As a result, water takes on the properties of a liquid at room temperature.

Salt (NaCl) is made up of positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-). These ions are held together by strong ionic bonds, which keep the particles in a fixed position. As a result, salt takes on the properties of a solid at room temperature.

a smartfood package indicates that one 17.7 g serving contains 51% carbohydrates. which conversion factor best represents this information?

Answers

The conversion factor that best represents the information provided in the smartfood package is grams of carbohydrates per gram of serving.

 

The package states that one 17.7 gram serving contains 51% carbohydrates, which can be converted to grams by multiplying the percentage by the total weight of the serving. So, 51% of 17.7 grams is approximately 9.09 grams of carbohydrates per serving. To express this as a conversion factor, it would be written as 9.09 grams of carbohydrates per gram of serving. This conversion factor can be used to convert the number of grams of carbohydrates in other serving sizes of the same food.

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Estimate the minimum detectable concentration of H2O2 if a small amount of catalase (solid) is added to a hydrogen peroxide solution in a calorimeter. Assume that a temperature rise of 2 0. 02oC can be distinguised. You can use a heat capacity of 4. 184 kJ/kg/K for the hydrogen peroxide solution

Answers

To estimate the minimum detectable concentration of H2O2, we need to determine the amount of heat released during the reaction between catalase and hydrogen peroxide and compare it with the minimum detectable temperature rise. The reaction between catalase and hydrogen peroxide can be represented as follows:

2H2O2 (aq) + Catalase --> 2H2O (l) + O2 (g)

The amount of heat released during the reaction can be calculated using the equation:

ΔH = - n * ΔH°

Where n is the number of moles of H2O2 and ΔH° is the standard enthalpy of reaction for the reaction between catalase and hydrogen peroxide. The standard enthalpy of reaction can be estimated from the standard enthalpies of formation of the reactants and products.

Since the heat released by the reaction is proportional to the number of moles of H2O2, we can calculate the minimum detectable concentration of H2O2 by dividing the minimum detectable heat release by the heat capacity of the hydrogen peroxide solution and the ΔH°.

Assuming a heat capacity of 4.184 kJ/kg/K for the hydrogen peroxide solution and a temperature rise of 0.02oC, the minimum detectable heat release can be calculated as follows:

ΔQ = mcΔT

Where m is the mass of the hydrogen peroxide solution and c is the heat capacity.

Let's assume the mass of the hydrogen peroxide solution is 100 g. Then, the minimum detectable heat release can be calculated as follows:

ΔQ = (100 g) * (4.184 kJ/kg/K) * (0.02 K) = 0.83 kJ

The minimum detectable concentration of H2O2 can then be calculated as follows:

n = ΔQ / ΔH°

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PARTICULATES in the air, including ---(1)---, from DIESEL
ENGINES and DUST causes ---(2)--- problems in humans

Answers

PARTICULATES in the air, including particulate matter, from DIESEL

ENGINES and DUST cause respiratory and cardiovascular health problems in humans

What is particulate matter(PM)?

This refers to solid particles and liquid droplets found in the air. PM can be gotten from many places. In general, any type of burning or dust-generating activities are sources of PM. Some examples are Emissions (from vehicles and industrial plant smokestacks) etc.

We have two categories of particulate matter: primary and secondary particulate matter.

Primary particulate matter is emitted directly from:

construction sites wildfires wood burning gravel pitsagricultural activities dusty roads.

Secondary particulate matter is formed in the atmosphere as a result of  complex chemical reactions.

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if 13.90 ml of 0.695 m koh is required to titrate the unknown acid to the equivalence point, what is the concentration of the unknown acid?

Answers

The concentration of the unknown acid is calculated to be 9.6605/ volume of the unknown acid

The following formula can be used to calculate the concentration of the unknown acid;

as we know moles is concentration multiply by volume

so,

C₁V₁ = n₁

C₂V₂ = n₂

Where C is concentration v is volume and n is moles. C₁V₁ is unknown acid and  C₂V₂ is KOH

At the equivalence point;

n₁ =n₂

Therefore;

C₁V₁ =  C₂V₁

Assuming that the volume of KOH is 13.90 ml and that (concentration of the unknown acid) = 0.695 M

Therefore, C₁ or concentration of unknown acid can be calculated as follows;

C₁V₁ =  C₂V₂

C₁ =  C₂V₂ /  V₁

C₁ =  0.695 x 13.90  / V₁

Ca = 9.6605 / V₁

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A Maillard Reaction occurs when proteins and sugars break down and rearrange themselves into ring-like structures that reflect light. What does this do for foods like cookies, turkeys, and burgers?

Answers

The Maillard reaction creates brown pigments in cooked meat in a very specific way: by rearranging amino acids and certain simple sugars, which then arrange themselves in rings and collections of rings that reflect light in such a way as to give the meat a brown color.

The advanced Maillard reaction involves breaking down the Amadori product into a variety of fission products that are composed of the sugar-amino complex. In the ultimate Maillard reaction, amino compounds and sugar fragments condense to form polymerized proteins and brown pigments called melanoidins. In the Maillard reaction, an organic chemical process, reducing sugars and amino acids combine to create a complex brew of chemicals. The distinct flavour and aroma of browned food are the result of this process. The French chemist Louis Camille Maillard's name is associated with the Maillard reaction.

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1.
Part II: True Statements
Directions: Circle the word in parentheses that makes each statement true.
New substances are formed during a (physical, chemical) change.
Many physical and chemical changes are affected by (light, temperature).
3.
A (physical, chemical) change is one where no new substances are formed.
2.
Independent Practice
4.
5.P 9.1 Chemical and Physical Changes
The mass of a melted candle (will, will not) change, but the mass of a burned
candle (will, will not) change.

Answers

The mass of a melted candle will not change after it has been melted.

The mass of a melted candleThis is an example of a physical change, where the form of the candle has changed but it is still made up of the same elements and compounds.On the other hand, the mass of a burned candle will change, as the candle is no longer made of the same elements and compounds.This is an example of a chemical change, where new substances are formed from the original elements and compounds.Both physical and chemical changes can be affected by light and temperature.For example, when a candle is exposed to heat and light, the temperature of the candle increases and the candle will begin to melt.This is a physical change that is affected by light and temperature.Similarly, when a candle is exposed to heat and light, the temperature of the candle increases and the candle will begin to burn.This is a chemical change that is affected by light and temperature, as the burning of the candle creates new substances such as smoke and ash.

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11 B
5

Mass =

Protons =

Neutrons =

Element =

Answers

mass:11
protons:5
neutrons:6
element:boron

The steps done and develops human skills or builds structures to reduce risk you are doing​

Answers

The steps done and develops human skills or builds structures to reduce risk you are doing​ is a. capacity building.

The capacity building is the process of the developing the skill or the strengthening the skills. There are the four steps in the capacity building.

1) Needs the assessment

2) Design

3) Implementation

4) Monitoring

These are process to reduce the risk of what you are doing. The capacity building includes the leadership developments. The capacity budling consist of the training and the mentorships.

Thus the capacity budling is The steps done and develops human skills or builds structures to reduce risk you are doing​

This question is incomplete, the complete question is :

The step done and develops human skills or builds structures to reduce risks you are doing.

a. capacity building

b. training

c. facility constructing

d. skills honing

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The density of ether is 0.714 g/mL. What is the mass of 1.45 L of ether?

Answers

The mass of 1.45 L of ether is

4.9 x 10^-7 kg

It is given that

density of ether = 0.714 g/mL

volume of ether = 1.45 L = 1450 ml

We have to find mass of 1.45 L of ether

Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume. Density Symbol, D or ρ Density Formula ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.

Density = Mass/Volume

0.714 g/mL = Mass/1450 ml

Mass = 0.00049 gram

Mass = 4.9 x 10^-7 kg

Hence, mass of 1.45 L of ether is

4.9 x 10^-7 kg

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How many mL of butane would you
add to hexane to make 750 mL of a
25.0% by volume butane solution?

Answers

Considering the definition of volume percentage, 187.5 mL of butane you would add to hexane to make 750 mL of a 25.0% by volume butane solution

Volume percentage

Volume Percentage is defined as the ratio of the volume of the component to the volume of the solution, expressed as a percentage. That is, it refers to the volume of solute per 100 volume units of the solution.

The volume percentage of a solution is determined by the following expression:

Volume Percentage= (volume of solute÷ volume of solution) ×100%

Volume of butane

In this case, you know:

volume percentage= 25 %volume of solute= ?volume of solution= 750 mL

Replacing in the definition of volume percentage:

25%= (volume of solute÷ 750 mL) ×100%

Solving:

25%÷ 100%= volume of solute÷ 750 mL

0.25= volume of solute÷ 750 mL

0.25× 750 mL= volume of solute

187.5 mL= volume of solute

Finally, the volume of butane in the solution is 187.5 mL.

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In a compound, which type of bond is the sharing of electrons between adjacent atoms?

Answers

Covalent bonds are what occur when nearby atoms share electrons inside a molecule. Atoms share electrons in a covalent connection in order to reach their highest energy level.

Covalent bonds are also referred to as the valence shell because they have the right amount of electrons for a stable noble gas arrangement. Atoms can attain a more stable electron configuration and create a chemical bond because to this sharing of electrons.

The strength of the bond and the characteristics of the compound are determined by the amount of electrons shared, which is dependent on the number of electrons required to fill the valence shells of the atoms involved.

However, certain metal atoms may also create covalent bonds with non-metal atoms. Covalent bonds are commonly formed between non-metal elements. It is significant to remember that there are other types of bonds besides covalent ones, including ionic and metallic bonds.

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students work together durlng an experlment about newlon's laws the students use a setup that conslsts of a cart of known mass connected to one end of a strlng thal ls looped over a pulley of negllgible frlctlon, wlh lts other end connected to a hanging mass the cart ls lnltlally a rest on a horlzontal surface and rolls wlhoul sllpplng when released the lnertla of the cart's wheels ls negllgible, sudents have access o common laboratory equlpment o make measurements of components of the system the shdents double the mass that hangs hom de string they also replace the original cart with a new cart that has double the mass. by doubling bolh masses, how will the tension in lhe string and the acceleration of the cart change? ntify the diseases that are at an increased risk of transmission due to needle-sharing activities of intravenous drug users.multiple select question.hepatitisaidsasthmaeczema simplify 2 11/12x-5/6)(x-(2/5) according to government data, 22 percent of children in the united states under the age of 6 years live in households with incomes that are classified at a particular income level. a simple random sample of 300 children in the united states under the age of 6 years was selected for a study of learning in early childhood. if the government data are correct, which of the following best approximates the probability that at least 27 percent of the children in the sample live in households that are classified at the particular income level? (note: z represents a standard normal random variable.) A. P( z>(0.27-0.22)/root((0.22)(0.73))/300 B. P( z>(0.27-0.22)/root((0.27)(0.73))/300 C. P( z>(0.22-0.27)/root((0.22)(0.78))/300 D. P( z>(0.22-0.27)/root((0.27)(0.73))/300 fidelma is 5 years old, and she likes to help her mother when it is time for supper. however, her mother is often quick tempered at the end of the day, scolding fidelma when she tries to help. her mother finds she can get things done more quickly if fidelma stays out of the way. based on erikson's theory, fidelma may fail to develop: please choose the correct answer from the following choices, and then select the submit answer button. answer choices A 25.0 mL sample of H2SO4 requires 20.0 mL of 2.00 M KOH for complete neutralization. What is the molarity of the acid? a colleague brings in data that is a hand written account of what the user was doing as she was completing a given task in the grocery store What can humans do to help eradicate the issue? Bailee had a gross income of $2,358.33 during each pay period of the year. Ifshe got paid monthly, how much of her annual income was deducted forFICA?O A. $410.35OB. $1,754.60O C. $2,164.95OD. $1,881.95SUBMIT using the method of joints, determine fab , fbc , and fbd , the magnitude of the force in each of the members connected to joint b. assume for your calculations that each member is in tension, and include in your response the sign of each force that you obtain by applying this assumption. Our road and highway system represent one of the most robust federal government efforts ever taken to meet the Americans need to travel. In your opinion, has the system worked in keeping up with the US society and economic demands? What statement best describes the gravitational force of an object? Determine how (if possible) the triangles can be proved similar.Select one:A. SAS~B. SSS~C. Not SimilarD. AA~ B) How does a vaccine change the body? (1 point) Marking brainliest !! Can yall help me in question 11? to the best of your knowledge, classify each of the following as an element, compound, or mixture. explain how your everyday experiences influenced your response. a. silver coin b. air c. coffee d. soil which best expresses the relationship between genes and dna?they are unrelated chromosomes are sections of genes and dnagenes are segments of dnadna destroys genes highest rate offered on a certificate of deposit from a bank After entrepreneurs such as Glenn Curtiss started building practical aircraft, the federal governmenta) began to restrict commercial flights.b) began to support the airline industry.c) ordered a fleet of new warplanes.d) restricted flying in urban areas. During the lecture, we calculated the Debye length at physiological salt concentrations and temperature, i.e. at an ionic strength of 150 mM (i.e. 0.150 mol/l) and a temperature of T=310 K. We predicted that electrostatic interactions are effectively screened beyond distances of 8.1 in solutions with a physiological salt concentration.1)What is the Debye length in a sample of distilled water with an ionic strength of 10.0 M (i.e. 1.00 * 10^-5 mol/l)? Assume room temperature, i.e. T= 298 K, and provide your answer as a numerical expression with 3 significant figures in (1 = 10^-10 m).