Answer:
Problems of Using Ionic and Covalent Compounds in Medicine
Stomach pain.
Nausea.
Vomiting.
Heartburn.
Gas.
Constipation.
Diarrhea.
Which sentence most accurately describes the daily growth rate of plants? (1 point)
Answer: D- average change in plant height, divided by, the number of days.
(i had to look up the test you were talking about to find what the answer choices were.)
Hope this helps!
One molecule of silver atoms contains the same number of items found in one mole of calcium atoms. TrueFalse
When they talk about items found, they refer to molecules. According to Avogadro, one mole of any substance, regardless of its type, contains the same amount of molecules equal to 6.022x10^23.
Now they tell us about a molecule of silver and a mole of calcium. In one mole of calcium, there will be 6.023x10^23 molecules, which is different from one molecule of silver, so the answer will be false
Prior to the industrial revolution, what was the previous highest level of co2 concentration in the atmosphere over the prior 400,000 years?.
Prior to the industrial revolution, the previous highest level of CO2 concentration in the atmosphere over the prior 400,000 years was 300 ppm.
Before the Industrial revolution, the carbon dioxide concentration in the atmosphere was lesser as there was not much carbon dioxide waste that was produced. The highest level of carbon dioxide recorded in the air was 300 ppm at that time.
After the industrial revolution, the concentration of carbon dioxide increased. We can see the carbon dioxide concentrations to reach as high as 1.5 trillion tons today. This is because the formation of industries has been increasing since then which produces a lot of waste carbon dioxide.
To learn more about industrial revolution, click here:
https://brainly.com/question/13323062
#SPJ4
avogadro's law states that under constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas. what is the relationship consistent with this statement?
According to Avogadro`s law, the volume of gas is directly proportional to number of moles of gas.
This law mathematically can be written as:
V ∝ n
V = K n
V/n = K
Where V represents the volume of gas
n represents the number of moles of gas
k is proportionality constant at a given temperature and pressure
This law explains that how equal volumes of all gases contain the same number of molecules when the temperature and pressure are the same. Similarly, this law can be used to compare the same substances under two different sets of circumstances.
V₁ / n₁ = V₂ / n₂
This equation shows that the volume of the gas increases proportionally to the amount of number of moles of gas. Similarly, if the amount of gas decreases result in decrease in number of moles. As a result, neither the size of the molecules nor the molar mass of the gas affects how many atoms or molecules there are in a given volume of an ideal gas.
To learn more about Avogadro`s law click here
brainly.com/question/4133756
#SPJ4
Using the table of average bond energies, determine the total bond energy for the reactants in the combustion of ethene: C2H4 + 3 O2 --> 2 CO2 + 2 H2O
Explanation:
Hydrogen bonds with carbon 4 times, carbon bonds with itself once, and oxygen bonds with itself 3 times.
Energy of reactants:
E = 4 * 413 + 347 + 3 * 495
= 3484kJ/mol
Answer:
Energy transferred in = 3484kJ/mol
a compound is analyzed and found to contain 12.1% carbon, 16.2% oxygen, and 71.7% chlorine (by mass). calculate the empirical formula of this compound.
Answer:
COCl2 Phosgene
Explanation:
a certain reaction is known to be second order in species a. what is the numerical value of k (in m^-1s^-1), the rate constant, if the concentration of a decreases from 1.50 m to 0.367 m after 141.4 seconds? (give your answer to 3 sig figs)
The rate constant, if the concentration of a decrease from 1.50 m to 0.367 m after 141.4 seconds the numerical value of k = 0.01460.
A rate constant is a number that describes the relationship between the rate of a chemical reaction and the molar concentration of the reactants. We can learn about the variables that affect a reaction's rate by looking at its rate constant. We can determine the dependence of the molar concentration of the reactants on the rate of reaction by knowing the rate constant.
The abundance of a constituent divided by the sum of the mixture's volumes is the definition of concentration in chemistry. There are several different categories of mathematical description: mass concentration, molar concentration, number concentration, and volume concentration. notably the state of concentration turning the focus on a single thing My focus is being disturbed by all that noise.
Learn more about rate constant here :
https://brainly.com/question/20305871
#SPJ4
can some one please answer these chemistry questions
most of the triose phosphate produced by the calvin cycle is used to regenerate rubp, which is the first reactant in the cycle. what output of the light reactions is directly required for the regeneration steps?
Adenosine triphosphate is directly required for the regeneration steps.
What is Adenosine Triphosphate?
Adenosine triphosphate (ATP) is the source of energy for use and storage at the cellular level. The structure of ATP is a nucleoside triphosphate, consisting of a nitrogenous base (adenine), a ribose sugar, and three serially bonded phosphate groups.
What is Calvin cycle?
The Calvin cycle, light-independent reactions, bio synthetic phase, dark reactions, or photosynthetic carbon reduction cycle of photosynthesis is a series of chemical reactions that convert carbon dioxide and hydrogen-carrier compounds into glucose.
To learn more about ATP, click https://brainly.com/question/19786223
#SPJ4
in a beaker, 0.57 mol of potassium iodide and 0.52 mol of lead (ii) nitrate are dissolved in water. a reaction occurs, and a white precipitate is observed. calculate the mass (in grams) of the precipitate formed
The white precipitate formed is lead iodide (PbI₂) of mass 131.38g
What is a precipitate reaction?The term "precipitation reaction" may be described as "a chemical response taking place in aqueous solution wherein ionic bonds integrate to shape an insoluble salt". These insoluble salts fashioned in the course of precipitation reactions are referred to as precipitates. Precipitation reactions are normally double displacement reactions with the formation of stable residues referred to as precipitates.
One of the first-class examples of precipitation reactions is the chemical response among potassium chloride and silver nitrate, which precipitates stable silver chloride. This is an insoluble salt fashioned as a made from precipitation reactions. The chemical components for this precipitation response is proven below.
AgNO3(aqueous) + KCl(aqueous) —–AgCl(precipitate) + KNO3(aqueous)
For the given case,
The balanced reaction is as follows:
Pb(NO₃)₂ (aq) + 2KI (aq) → 2KNO₃ (aq) + PbI₂ (s)
This tells us that for every mole of lead iodide (PbI₂) produced, it requires 2 moles of potassium iodide (KI).
If you have 0.57 mole of KI, they will produce: 0.57/2 = 0.285 mol of PbI₂
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
mass of lead iodide (PbI₂) = Number of moles × molar mass
Mass of lead iodide = 0.285 × 461.01
Mass of lead iodide = 131.38g
To know more about precipitate reaction visit:
https://brainly.com/question/24158764
#SPJ4
How many atoms are in 3Mg(OH)2?
Answer:
15
Explanation:
Number of atoms of Mg = 3
Number of atoms of O = 3 × 2 = 6
Number of atoms of H = 3 × 2 = 6
So, total atoms = 3 + 6 + 6 = 15
What protects the earth from the sun's rays
Answer
The Ozone Layer
Explanation
Higher up, in the stratosphere, the ozone layer absorbs solar ultra-violet radiation and affects how much of the Sun's heat is radiated back into space. The ozone layer shields us from the harmful effects of excessive UV radiation, which can lead to sunburn, skin cancer and eye damage.
Pls Mark As Brainliest
When acetyl-coa containing radioactively labeled carbon atoms is fed to cells, the co2 produced is not initially radioactive. However, molecules of citrate and oxaloacetate are radioactive. Only after some time has passed will radioactive co2 be released. What is the best explanation for this observation?.
Acetyl-co A containing radioactively labeled carbon atoms when fed to cells produce Co2 which are not radioactive but molecules of citrate and oxalo acetate are radioactive because citrate and oxalo acetate are part of the Krebs Cycle, which is responsible for generating energy in cells.
The Krebs Cycle involves a series of reactions in which acetyl-co A is broken down to generate energy. The carbon atoms in acetyl-co A are gradually transferred to other molecules in the cycle, including citrate and oxalo acetate. As the carbon atoms are transferred, they become radioactive. Eventually, the carbon atoms are transferred to Co2, which is then released from the cells.
To learn more on Kreb's cycle visit: https://brainly.com/question/1747777
#SPJ4
The Conduction and Convection Gizmo shows two flasks of colored water, one blue and one yellow. Select Copper and Solid chunk from the dropdown lists. (This means the two flasks are separated by a solid piece of copper, and the two liquids cannot touch each other.)
Use the sliders to make What happens?
The Conduction and Convection Gizmo shows two flasks of colored water, one blue and one yellow. Select Copper and Solid chunk from the dropdown lists his means the two flasks are separated by a solid piece of copper, and the two liquids cannot touch each other then temprature tries to become the even/leveled
Conduction is the process to transfer heat from one substances to another by direct contact and convention means a rise and sink due to temprature and density differences this is called convention and when two flasks are separated by a solid piece of copper, and the two liquids cannot touch each other then to use the sliders to make one flask hotter than other and the temprature tries to become the even/leveled
Know more about convention
https://brainly.com/question/12342626
#SPJ1
how do chandeliers use energy
Answer:
as they use multiple bulbs in conjunction chandeliers don't need higher watt bulbs and are usually not used as often as other lights
Explanation:
hope this helps
Which of the following is an example of demonstrative evidence?
O Gun
O Fingerprint
O Handwritten note
O Model of crime scene
What might happen if the strong force didn't exist?
(B) Atomic nuclei would fly apart if strong force did not exist.
The nucleus occupies a small fraction of the atomic volume and contains the number of protons and neutrons characteristic of a particular isotope. Electrostatic repulsion forces normally cause positively charged protons to repel each other, but the nuclei do not fly off due to the strong nuclear force, the very strong but very short-range attraction between nucleons.
All stable nuclei except hydrogen have at least one neutron to overcome the electrostatic repulsion between protons. As the number of protons in the nucleus increases, the number of neutrons required for a stable nucleus increases even faster. If there are too many protons (or too few neutrons) in the nucleus, the forces will be unbalanced and the nucleus will become unstable.
Strong nuclear forces are sometimes simply called strong forces or strong interactions. This force is strong enough to overcome the repulsive force between her two positively charged protons, allowing protons and neutrons to stick together in an unimaginably small space.
Learn more about Strong and weak forces here:
https://brainly.com/question/3293487
if use a sepratory funnel containing a phenol with methylene chloride and an nahco3, where will the phenol be located? the answer is organic and bottom layer, but why is that and how do we answer similar questions?
phenol does not react with NaHCO3 , phenol solubility in water is very less about 8g in 100mL of water , so it will be present in organic layer (methylene chloride) , methylene chloride has a density of 1.33g/mL greater than water so it will be below layer in which phenol is present.
What is the function of separatory funnel?Immiscible liquids are separated using a separatory funnel, or sep funnel. Two layers appear in a separatory funnel when two immiscible liquids are added. The lower layer will be made up of the denser solvent. Most halogenated solvents are less dense than water, but most non-halogenated solvents are.
A separating funnel is used by adding the two phases and the mixture to be separated via the top while keeping the stopcock at the bottom closed. After then, the funnel is shut and gently shaken by being inverted several times. If the two solutions are combined too vigorously, emulsions will form.
To know more about separatory funnel visit:
https://brainly.com/question/23208199
#SPJ4
The nominal concentration of acetic acid in commercial vinegar is 5%. Calculate the molarity of this solution. What assumptions did you need to make to calculate the concentration?.
The main assumption to make is that the density of 5% vinegar is equal to the density of water. Then, for the purposes of the calculation, it is easiest to assume a certain volume of 5% vinegar is used. With these assumptions, we can calculate that the molarity of the solution is 0.83 M.
To calculate the molarity (c) of the solution, we need the number of moles (n) of solute and the volume (V) of the solution:
c = n/V
If we assume that we have 100 mL of 5% vinegar and that its density (d = 1.00 g/mL) is equal to the density of water, we can calculate the mass of the solution (m) using its density and volume (V = 100 mL = 0.100 L):
d = m/V ⇒ m = d*V
m = 1.00 g/mL * 100 mL
m = 100 g
Now we can use the mass and mass percentage (%m = 5% = 0.05) to calculate the mass of acetic acid (AcOH) present:
m(AcOH) = %m * m(solution)
m(AcOH) = 0.05 * 100 g
m(AcOH) = 5 g
Using the mass of AcOH we can calculate the number of moles (n) present by using the molar mass of AcOH (M = 60 g/mol):
n = m/M
n = 5 g / 60 g/mol
n = 0.083 mol
Finally, we calculate the molarity:
c = 0.083 mol / 0.1 L
c = 0.83 M
You can learn more about molarity here:
brainly.com/question/16727614
#SPJ4
are plants and animals ph sensitive?
Answer:
yes, they are ph sensitive
Explanation:
Plants and animals are known to show growth sensitive to pH. pH is known as the hydrogen ion concentration of a solution. For example, plants are known to be growth sensitive to the pH of the soil. Plants need an optimum pH of soil for their growth, hence, showing growth dependence on soil pH.
Jane is conducting an experiment on whether different colored light bulbs have an effect on the number of flower buds on a plant. explain how her experiment should be counducted.
The experiment should be conducted by Jane for several days and the observation of each light and its effect on the plant buds should be noted carefully.
To conduct this experiment, first, place a flowering plant in a place that receives that receive optimum sunlight. This is because this experiment is to be conducted at night time to observe the changes in the bud.
The plant should be watered and at the night, the plant should be placed under a colored light say let us take the blue colored light for the first week. The structure and shape of the bud should be noted in the initial time while placing the colored light after sunset and it should be noted before sunrise.
This observation should be noted for a week. For consecutive weeks, the colors of the light should be changed and the same observations are to be noted.
Later, from the observations inferred, the conclusion could be obtained if the plant and its bud have any effect on exposure to colored lights for several weeks.
To know more about experiments, click below:
https://brainly.com/question/26117248
#SPJ1
when one mole of caffeine(c8h10n4o2)is burned in air 4960 kj of heat is released. 5.00g of caffeine is burned in a bomb calorimeter. the temperature is observed to increase by 11.37oc. what is the heat capacity of the calorimeter in kj/oc?
Answer:
Explanation:It is given that burning one mole of caffeine gives heat.
The given mass of caffeine is 5g.
Molar mass of caffeine can be calculated as shown below.
Calculate the number of moles of caffeine burned as follows:
Q = mc ΔT
0.0258 ×4.96 × 103 × 284.37
= 3.64 × 104J/°C
what is the volume in liters of 3.75 moles of o2 gas
The volume of 3.75 moles of oxygen gas at STP is 84.05L.
How to calculate volume?The volume of a gas can be calculated using the ideal gas law equation as follows:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperatureAt standard temperature and pressure (STP), the temperature and pressure of an ideal gas is 273K and 1 atm respectively.
1 × V = 3.75 × 0.0821 × 273
V = 84.05L
Therefore, 84.05L is the volume of the ideal oxygen gas.
Learn more about volume at: https://brainly.com/question/12357202
#SPJ1
1. Aqueous lead(II) nitrate and aqueous potassium iodide are added to a dish containing water, as
shown.
aqueous lead(II) nitrate aqueous potassium iodide
yellow precipitate
A yellow precipitate forms after a few minutes.
Which process occurs before the precipitate forms?
A diffusion
B distillation
C fermentation
D filtration
When aqueous lead (II) nitrate and aqueous potassium iodide are added to a dish containing water, diffusion occurs before the formation of yellow precipitate.
Diffusion is a process involving the movement of molecules to the region of lower concentration from the region of higher concentration.
When aqueous lead (II) nitrate and aqueous potassium iodide are added to a dish containing water, the compounds would dissociate into ions. Immediately after the dissociation, the ions would start to diffuse through the molecules of water to lower concentration.
After diffusion, the yellow compound lead iodide would form from the reaction between iodide ions in potassium iodide and lead ions from lead nitrate. The yellow compound would later precipitate out of the solution.
The reaction involved between the compound result in potassium nitrate and lead iodide
Lead nitrate (aq) + Potassium iodide (aq) → Lead iodide (yellow precipitate) + Potassium nitrate
To know more about Diffusion
https://brainly.com/question/14852229
#SPJ1
how does the atmospheric pressure change as you move from places of high elevation to low elevation?
On moving from places of high elevation to a place of low elevation, the atmospheric pressure increases as the amount of air over unit area increases.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
Learn more about pressure,here:
https://brainly.com/question/18107358
#SPJ1
5. few spiders are
dangerous because they
are
a penny having a mass of 2.5559 g was dissolved in 20 ml of 8 m hno3. the resulting solution was transferred to a 100.00-ml volumetric flask and diluted to the mark with water. this solution was found to have a concentration of 1.06 x 10-2m cu2 . what is the % by mass of copper in the penny?
For a penny having mass 2.5559g dissolved in hno3 and solving from the process as given in the question we get that the penny has 2.64% of copper (Cu) by mass in it
Mass of penny mp = 2.5559g
concentration of Cu in solution = 1.06 * 10^(-2) mol/L
therefore 100ml diluted solution has
n = 1.06*10^(-2) * 100 / 1000 = 1.06 * 10^(-3) mol of copper
The molecular weight of copper mw = 63.5 g/mol
mass of copper Mcu = n * mw(molecular weight of copper)
⇒Mcu = 1.6 * 10^(-3) mol * 63.5 g/mol
⇒Mcu = 0.06731 g
Percentage by mass of copper in the penny, P= (Mcu/ mp)* 100%
⇒ P = (0.06731/2.5559)* 100 %
⇒P = 2.64%
∴There is 2.64% copper by mass in the penny
Problem to find out the mass percentage of a metal:
brainly.com/question/13767766
#SPJ4
The hydrochloric acid utilized in this experiment can often discolor gloves if it is spilled on them during use. If this does occur, what should be done in order to remedy this potentially hazardous situation?.
Option B: Apply some sodium bicarbonate to the gloves to neutralize them in order to address this potentially dangerous condition with hydrochloric acid.
What is hydrochloric acid?Muriatic acid, another name for hydrochloric acid, is an aqueous solution of hydrogen chloride. It's a really dull response with a strong odor. It is currently classified as a powerful acid. It is a component of stomach acid in the digestive systems of the majority of animal species, including humans.
In the food, textile, metallurgical, and rubber industries, hydrogen chloride (HCl) is typically employed as a bleaching agent to neutralize alkaline marketers. It quickly hydrolyzes when exposed to water and is far neutralized when released into the soil.
To learn more about hydrochloric acid refer to:
https://brainly.com/question/24586675
#SPJ4
A pure yellow crystalline substane, when heated in a vacuum, releases a greenish gas and a red powder. Is the original yellow crystalline substance a compound or element?
Answer:The yellow crystalline substance is a compound. The green gas and red powder are elements.
Explanation
Elements and compounds are considered pure substances. Elements are made up of a single type of atom while compounds are composed of two or more elements. One example of a compound is the table salt (NaCl) which is made up of one atom of sodium and one atom of chlorine. The elements in the compound are combined chemically and there is a definite ratio of these elements. They are formed by a chemical reaction where chemical bonds are formed. Furthermore, the components of the compound can be separated through several means such as extraction, distillation, etc. The process of heating the yellow crystalline substance resulted in the separation of its components namely, the green gas and red powder.
a stock solution of silver nitrate (agno3) is prepared by adding 97.364 g of silver nitrate to a 1000.00 ml volumetric flask and it is filled to the line with water. a 79.763 ml aliquote of the stock solution is added to a 200.00 ml volumetric flask and it is filled to the line with water. what is the molarity of the solution in the 200.00 ml flask?
The molarity of the silver nitrate solution in the 200.00 mL flask is 0.22856 M.
To calculate the molarity of the solution in the 200.00 mL flask, we must need the number of moles present and the volume (200.00 mL = 0.20000 L).
To obtain the number of moles present, we can calculate the mass of AgNO₃ in the 200.00 mL sample and then use the molar mass of silver nitrate (M = 169.87 g/mol) to calculate the number of moles.
So, if there's 97.364 g of silver nitrate in the 1000.00 mL flask, we can use a simple proportion to calculate the mass present in 79.763 mL:
97.364 g : 1000.00 mL = X : 79.763 mL
X = 97.364 g * 79.763 mL / 1000.00 mL = 7.7660 g
This same mass is present in the final 200.00 mL solution, as it is merely diluted. So, we can now calculate the number of moles (n) of silver nitrate:
n = m/M
n = 7.7660 g / 169.86 g/mol
n = 0.045712 mol
Finally, we can use this to calculate the molarity (c) of the final solution:
c = n/V
c = 0.045712 mol / 0.20000 L = 0.22856 M
You can learn more about molarity here:
brainly.com/question/2817451
#SPJ4