The mixing of which pair of reactants will result in a precipitation reaction? nano3(aq) nh4cl(aq) k2so4(aq) sr(no3)2(aq) csi(aq) naoh(aq) hcl(aq) ca(oh)2(aq)

The Ph = 10.3 and S = 8.287 x [tex]10^{-5}[/tex]

CaCO3 → Ca^+2 + [tex]CO_{3} ^{-2}[/tex]

Ksp = [Ca^+2] [ [tex]CO_{3} ^{-2}[/tex]] = s^2

We need to take into account the hydrolysis of carbonate ion with

K2 = 4.1 x [tex]10^{-11}[/tex]

H[tex]w_{3}^{-}[/tex] ⇄ H+ + [tex]w_{3}^{-2}[/tex]

K2 = [tex]\frac{[H+][CO_{3}^{-2}] }{[HW_{3}^{-}] }[/tex]

S = [tex]\sqrt{Ksp}[/tex]

S = [tex][Ca^{+2}] = [CO_{3}^{-2}] + [HW_{3}^{-}][/tex]

On putting the values, we will get

[tex][Ca^{+2}] = [CO_{3}^{-2}] +(1+ \frac{H^{+} }{K_{2} })[/tex]

S^2 = Ksp (1 + [tex](1+ \frac{H^{+} }{K_{2} })[/tex])

S = [tex]\sqrt{ Ksp (1+ \frac{H^{+} }{K_{2} })}[/tex]

at Ph = 6.3

[H+] = 5.011 x [tex]10^{-7}[/tex]

S = [tex]\sqrt{3.36 * 10^{-9} * (1+\frac{5.011*10^{-11} }{4.8*10^{-11} }) }[/tex]

S = 5.92 x [tex]10^{-3}[/tex]

at Ph = 10.3

[H+] = 5.011 x [tex]10^{-11}[/tex]

S = [tex]\sqrt{3.36 * 10^{-9} * (1+\frac{5.011*10^{-11} }{4.8*10^{-11} }) }[/tex]

S = 8.287 x [tex]10^{-5}[/tex]

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Answer:

protons=atomic number

electrons=atomic number-charge

proton=atomic mass-atomic number

Due to its higher density than water, dichloromethane creates an organic layer below the aqueous layer as opposed to above it as other solvents do.

Which compound is dichloromethane?

Organochlorine chemical dichloromethane (DCM, often known as methylene chloride or methylene bichloride) has the formula CH2Cl2. A common solvent is this colorless, flammable liquid with a sweet, chloroform-like odor. Although it is polar and miscible with many organic solvents, it is not miscible with water.

Methylene chloride, often known as dichloromethane, is an organic halogen compound that is colorless, volatile, and essentially nonflammable. It is frequently employed as a solvent, particularly in paint-stripping formulas.

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The scientific observation definition is any sensory revel about a natural phenomenon. medical observations can occur in a lab placing or inside the herbal world. as instance, watching an apple fall from a tree may be a remark. Noticing that fish handiest come to a specific part of the river in the early morning is likewise an observation.

Smelling rubbish decomposing is another example of observation. Observations can use any of the five senses and include anything that can boost a query or begin research. Extraneous variables may become confounding variables and when they are not controlled early enough in a study, they could affect the results of the experimental research.

An end is a statement based totally on experimental measurements and observations. It includes a precis of the consequences, whether or not or now not the speculation turned into support, the importance of the have a look at, and destiny research. The value of a managed test is that it yields an excessive diploma of self-assurance within the outcome.  which variable induced or did no longer purpose an exchange.

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The amount of water that must be added to 6.55 g of nacl to make a solution that is 16.2 % by mass at 25c is 33.8grams.

Given, the mass of NaCl = 6.55grams.

given, Percentage by mass of the solution is 16.2%

By percentage by mass formula we calculate the mass of NaCl in the solution.

Percentage by mass of the solution = Weight of NaCl / mass of solution(w) ×100

                                      16.2 = 6.55/ (w) ×100

  on calculating, we get  w = 40.43grams.

Now, mass of the solution = mass of NaCl + Mass of water

                                40.43g = 6.55 + Mass of water

                    Mass of water = 33.8grams.

Thus, the mass of water which can be added to the solution which is 16.2% by mass is 33.8grams.

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The height of the Eiffel tower after increase in temperature will be 321.06548m.

Temperature increased by 17⁰C

original height of tower is 321m

∆T = 17⁰C

We know that coefficient of thermal expansion for steel 12×10-⁶C-1.

The increase in height is given by

∆h = αh∆T

Putting values in the above equation

∆h = 12×10-⁶× 321 × 17

∆h = 0.065484m

therefore, the height after temperature increase by 17⁰c will be 321.06548m

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Answer:

The atom economy of ethane in this process is 19.72 %.

What is atom economy?

The conversion efficiency of a chemical reaction in terms of all the atoms involved and the desired products produced is known as atom economy (atom efficiency/percentage).

Explanation:

C₁₀H₂₂ → C₈H₁₈ + C₂H₄

Molecular weight of C₁₀H₂₂ = 142.28

Molecular weight of C₈H₁₈ = 114.228
Molecular weight of C₂H₄ = 28.053

% Atom economy =     [tex]\frac {Molecular weight of C2H4} {Molecular weight of C10H22}[/tex]

                             = [tex]\frac{28.053}{142.28}*100[/tex]

                             = 19.716 %

                             ≈ 19.72 %

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Based at the Mohs Hardness Scale, Calcite will be scratched via way of means of a penny however now no longer via way of means of a fingernail.

What is mohs hardness scale?

The Mohs scale of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of various minerals via the capacity of more difficult fabric to scratch softer fabric.

Despite its loss of precision, the Mohs scale is applicable for area geologists, who use the size to more or less discover minerals the usage of scratch kits. The Mohs scale hardness of minerals may be generally discovered in reference sheets.

Mohs hardness is beneficial in milling. It lets in evaluation of which type of mill will nice lessen a given product whose hardness is known.[8] The scale is used at digital producers for trying out the resilience of flat panel show components (inclusive of cowl glass for LCDs or encapsulation for OLEDs), in addition to to assess the hardness of contact displays in customer electronics.

Based at the Mohs Hardness Scale, Calcite will be scratched via way of means of a penny however now no longer via way of means of a fingernail.

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The balanced equation for the reaction in this experiment is 3CuSO4(aq) + 2Al(s) →→→ Al2(SO4)3 + 3Cu(s) In this experiment, you have seen that exactly 1,99 g copper sulphate is reacted aluminium. When the reaction reaches completion, 0,57 g of copper was collected. Determining the limiting reagent 2.1.1 Calculate the number of moles in 1,99g of copper sulphate.

2.1.2 Calculate the number of moles in 0,254g of aluminium.

2.1.3 Determine the limiting reagent in this reaction. Provide some calculations as well as a justification for your answer

3CuSO4(aq) + 2Al(s) → Al2(SO4)3 + 3Cu(s)

as per the reaction , we can see that in this

3 moles of copper sulphate and 2 moles of aluminium required to make 1 moles of aluminium sulphate and 3 moles of copper

so from this we concluded that copper sulphate is limiting reagent because due to high moles needed it will cause to stop reaction

as in reaction 3 moles copper sulphate requires  480g and 2 mole aluminium requires 54g so here CuSO4 is limiting reaction.

2.1.1)   number of moles in 1,99g of copper sulphate.

moles= given mass of substance/ molecular mass of substance

moles= given mass of  copper sulphate/ molecular mass of  copper sulphate

moles =  1,99g/160g

moles=1.24 moles

2.1.2) number of moles in 0,254g of aluminium.

moles= given mass of  aluminium/ molecular mass of aluminium

moles=254g/27

moles=0.40mole

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Answer:

The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus. The gel-like matrix in which the nuclear components are suspended is the nucleoplasm.

Answer:

No.

Explanation:

Energy is releasing into your body via a process of chemical reactions called respiration. Without respiration, energy cannot be released from food and transfered to cells.

For units of volume: 1 milliliter is about the volume of a raindrop. 1 cup is about the volume of a school milk carton.

The volume occupied by an object in three dimensions is calculated. It is often quantified mathematically using SI-derived units, such as the cubic meter and liter, or other imperial measures (such as the gallon, quart, cubic inch). The definitions of volume and length have a connection (cubed). Usually, the volume of a container is thought of as its capacity, or the amount of fluid (gas or liquid) that it could hold, rather than the amount of space the container takes up.

Ancient societies used standardized containers, which were later formed from naturally occurring containers, to compute volume. Several three-dimensional shapes have simple mathematical formulas that can be used to calculate their volumes.

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If one or more nucleotide pairs are deleted from a DNA strand, this is known as a frameshift mutation

Insertions or deletions in the genome that are not multiples of three nucleotides are referred to as frameshift mutations. They are a particular class of insertion-deletion (indel) alterations that are present in polypeptides' coding sequences. Here, there are no multiples of three in the number of nucleotides that are added to or subtracted from the coding sequence. They may result from really basic alterations like the insertion or deletion of a single nucleotide.

One of the most harmful modifications to a protein's coding sequence is a frameshift mutation. They are quite prone to produce non-functional proteins that frequently interfere with a cell's metabolic processes and result in significant alterations to polypeptide length and chemical makeup. Frameshift mutations can cause the mRNA to stop translating too soon and create an extended polypeptide.

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The specific gravity of the mixture is 0.89.

Antifreeze volume = 4.5L

Specific gravity of antifreeze = 0.80

Water volume = 3.8L

Specific gravity of water = 1

Specific gravity of the mixture =

(volume of water * water specific gravity + volume of antifreeze * antifreeze sg) / volume of mixture

      = (3.8 * 1 + 4.5 * 0.80) / 8.3

      = 0.89

A measurement of a substance's density in relation to water's density is its specific gravity, which is more officially known as relative density. In general, specific gravity is calculated for solids and liquids in respect to water in its densest condition (at a temperature of 4 Celsius or 39.2 Fahrenheit), and for gases in relation to air at room temperature.

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Yes I would verify this equation as a general homogeneous equations.

What is homogeneous equation?

An equation with a differentiation, a function, and a number of variables is called a homogeneous differential equation. For any non-zero constant, the function f(x, y) in a homogeneous differential equation is a homogeneous function such that f(x, y) = nf(x, y).

[tex]Q= 8 μ ℓπ R 4 Δp[/tex] is given.

Put primary FLT dimensions to use.

[tex]L 3 T −1 =( 8π​ ) (FL −2 T) (L)(L) 4 (FL −2[/tex]   Adding and removing each side's exponent.

[tex](L) (3) (T) (−1) =( 8π​ ) (F) (1−1) (L) (4−2+2−1) (T) (−1)[/tex]

[tex](L) 3 (T) −1 =( 8π​ ) (L) 3 (T) −1[/tex]

The right side and left side of the equation are identical.

The equation is consequently a general homogeneous equation.

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Question :

The volume rate of flow, Q, through a pipe containing a slowly moving liquid is given by the equation:

Q=\frac{\pi R^{4} \Delta p}{8 \mu \ell}Q= 8μℓπR 4 Δp

​ where R is the pipe racius, \Delta pΔp the pressure drop along the pipe, \muμ a fluid property called viscosity \left(F L^{-2} T\right)(FL

−2

T), and \ellℓ the length of pipe. What are the dimensions of the constant \pi / 8π/8? Would you classify this equation as a general homogeneous equation? Explain.

Answer:one Proton

Explanation: Since there is only one proton in hydrogen and no neutrons, the atomic mass of the substance is 1. It is 4 for helium: 2 protons and 2 neutrons. The number of neutrons is equal to the number of protons for the majority of the 16 lightest elements (up to oxygen).

Simply transfer the cold plate/processors to the new system board; there is no need to remove the processor or disrupt the thermal material bond from the cold plate.

A cold-water conduit into your CPU is only one form of liquid cooling; there are a few others as well. Some server cabinets have chilled rear doors where cool air is pushed onto the server and cold water is piped through.

Microsoft is one of the IT corporations working with cold plate technology, which uses pipes of liquid to cool servers through metal plates. By employing it to cool the chips that record digital currency transactions, participants in the cryptocurrency business invented liquid immersion cooling for computing hardware.

The water block's coolant absorbs the heat from the CPU. To keep the processor or graphics card cold, a cooling liquid is known as coolant loops around the cooling kit. To remove air bubbles from the liquid as it circulates, the reservoir stores extra coolant.

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The Erlenmeyer flask that weighs 88.5 g has a volume of 0.125 L

To solve this problem, we have to do the conversion of units with the given information.

Information about the problem:

By converting the volume units from milliliters (mL) to litters (L), we have:

125 mL * (1 L / 1000 mL) = 0.125 L

0.125 L is equivalent to 125 mL

It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.

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7380 J/g is the  amount of heat must be added to 75g of ethyl alcohol to heat it from -5c to 35c

What is specific heat capacity?

The quantity of heat energy needed to raise the temperature of a unit mass of any substance or matter by one degree Celsius is known as its specific heat capacity.

The formula is as follows:

Q= m c ΔT

Here, Q is the quantity of heat energy needed to raise the temperature of one kilogram of a substance by one degree Celsius, and s is the system's specific heat capacity.

Here,

m = 75g

c = 2.46J/g °C

ΔT = 40°C

Q = 75*2.46*40 = 7380 J/g

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To indicate the quotient of two integers, use fractions.

11/15 of the potato was used.

From the question, we have the following parameters:

1 bag = 15 sweet potatoes

Casserole = 2/5

Pie = 1/3

The fraction of potato used is calculated using:

Fraction =  Casserole + Pie

Take LCM

11/15

Hence, the fraction of potato used is 11/15

There are three different kinds of integers: 0 (zero), positive integers (natural numbers), and negative integers (Additive inverse of Natural Numbers)

The collection of whole numbers and their antipodes is known as the integers. The set of integers does not include fractions or decimals. Integers include, for instance, 2,5,0,12,244,15, and 8.

The number zero (0), a positive natural number (1, 2, 3, etc.), or a negative integer denoted by a minus sign (1, 2, 3, etc.) are all examples of integers.

The inverse additives of the equivalent positive numbers are the negative numbers.

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Polarity of water is responsible for the versatility of water as a solvent.

Water is a molecule that is composed of hydrogen and oxygen. The compound is polar because if the high electronegativity difference that exists between hydrogen and oxygen.

As a result of this polarity, a permanent dipole moment exists between the molecules of hydrogen. This is a strong dipole that makes the molecules of water to aggregate together. This strong dipole that exists in water is what we call the hydrogen bond.

Now the hydrogen bond makes water to have a high surface tension and high boiling point. It also accounts for the differences in the solid and the liquid states of water.

As such, the polarity of water is responsible for the versatility of water as a solvent.

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If a scientist wanted to compare air quality throughout the united states but was unable to test the air in every city, the scientist could compare the air quality in a sample or subset of cities.

How to check the air quality?

The Air Quality Index, or AQI, is used to gauge air quality. The AQI functions similarly to a thermometer with a range of 0 to 500 degrees. But the AQI is a technique of displaying variations in the quantity of pollution in the air, not changes in temperature.

How do you sample air quality?

Small volumes of air can be collected through air sampling for testing in laboratories. The majority of air sampling techniques use a suction mechanism to draw complete air samples into a bag or container. After that, the bag or container can be sealed before being sent to a lab for analysis.

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The specific heat capacity of the metal having 0.2kg mass is  -125.5 J/kg°C.

The formula to calculate specific heat is

     c = Q / mΔT

     c = 502 / 0.2 (-20)

    c = -125.5

What is specific heat?

The amount of heat required to increase the temperature of 1 gram of a substance by 1 degree Celsius (°C) is known as specific heat. Since water has a higher specific heat than other substances, it requires more energy to raise its temperature.

In order to distinguish between two polymeric composites, specific heat is useful in estimating the processing temperatures and the quantity of heat required for processing.

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The property of acids which would cause acid rain to damage buildings over time is:

Acids react with limestone.

The correct answer choice is option c.

This simply means that acids has this property which corrodes the surface they come in contact with especially stones.

However, this can be done by coating the surface of metals, or carbonate by coating it with other metals. By so doing, this can prevent acid rain damage to it.

That being said, by default, concentrated acids are highly corrosive.

Coating surfaces of metals can prevent acid rain damage to it

This refers to a substance which when dissolved in water, it produces hydrogen ion as the only positive ion in the solution.

So therefore, the property of acids which would cause acid rain to damage buildings over time is acids react with limestone.

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This question probably pertains to an experiment called a double-slit interference experiment or a similar experiment. Let's say that slit 1 is closed and that we conduct the experiment with solitary electrons or photons.

Behind slit 2, we observe an incremental accumulation of hits in a non-interference pattern. Let's say we seal the slit. Behind slit 1, we can see the non-interference pattern. Let's now widen both slits. The impacts then create an interference pattern, as we can see. Note that (assuming it's a nearly flawless experiment with a very distinct interference pattern), there are specific locations termed "nodes" where NO electrons collide. The logical conclusion is that each individual electron "knows" that both slits are open when both are open, meaning that each electron effectively passes through both slits.

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The statement that describes how nuclear processes are significant is that they are the only process that can break down elements (option C).

Nuclear processes involves two notable types of nuclear reactions, which are;

Nuclear fission is a nuclear reaction in which a large nucleus splits into smaller ones with the simultaneous release of energy.

On the other hand, nuclear fusion is the combination of the nuclei of small atoms to form the nuclei of larger ones, with a resulting release of large quantities of energy.

Therefore, it can be said that the statement that describes how nuclear processes are significant is that they are the only process that can break down elements.

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The statements that are true about covalent compounds are;

Covalent compound refer to elements that are bonded by a covalent bond and it is formed when pair valence electrons in atoms are shared among each other. The compounds with covalent bonding are either liquid or gaseous at room temperature. Examples include ammonia.

Therefore, The statements that are true about covalent compounds are;

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Answer:

m³ (cubic metres)

Explanation:

m³ is the SI unit for measuring volume.

Answer:

The SI unit is m³ (cubic meters)

Explanation:

The answer for the particular question is probability and Schrodinger wave function.

The correct question would be :

an atomic orbital defines the __________ of finding an electron in a specific region of an atom. this electron density is referred by the square of the Schrodinger __________ function.

An atomic orbital is 3d structure where electrons are moving.

The Schrodinger wave equation connects the energy of an atom to its electrons with regard to the wave function of the electron. Each solution to the equation indicate an permits energy state of the atom and is connected with a specific atomic orbital.

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Using a magnet and the magnetic property of iron—which attracts iron but not sand—one can separate a combination of iron filings and sand.

Physical characteristics are those that may be observed by looking at an item or substance. When the makeup of a substance changes, certain qualities remain constant.

Sand and iron can be separated using an object's magnetic characteristics, which are the ability to attract magnets and/or materials containing iron.

So, one may separate a mixture of iron filings and sand using a magnet and iron's magnetic characteristic, which attracts iron but repels sand.

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Iron filings are attracted by a magnet. This is a physical property of iron but not of most other materials, including sand. How could you use this difference in physical properties to separate a mixture of iron filings and sand?