g For the following reaction with excess reagent, predict the product. Be sure your answer accounts for stereochemistry. If multiple stereocenters are formed, be sure to draw all products using appropriate wedges and dashes.

The percent composition of calcium acetate is 29.89% calcium, 17.92% carbon, 4.52% hydrogen, and 47.67% oxygen.

To calculate the percent composition of calcium acetate (Ca(C2H3O2)2), you need to determine the total atomic mass of each element in the compound and divide it by the molar mass of the entire compound.
The atomic mass of calcium (Ca) is 40.08 g/mol, the atomic mass of carbon (C) is 12.01 g/mol, the atomic mass of hydrogen (H) is 1.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol. The molar mass of calcium acetate is:
1 Ca atom x 40.08 g/mol = 40.08 g/mol Ca
2 C atoms x 12.01 g/mol = 24.02 g/mol C
6 H atoms x 1.01 g/mol = 6.06 g/mol H
4 O atoms x 16.00 g/mol = 64.00 g/mol O
Total molar mass = 134.16 g/mol
To calculate the percent composition of each element:
% Ca = (40.08 g/mol Ca / 134.16 g/mol) x 100% = 29.89%
% C = (24.02 g/mol C / 134.16 g/mol) x 100% = 17.92%
% H = (6.06 g/mol H / 134.16 g/mol) x 100% = 4.52%
% O = (64.00 g/mol O / 134.16 g/mol) x 100% = 47.67%
Therefore, the percent composition of calcium acetate is 29.89% calcium, 17.92% carbon, 4.52% hydrogen, and 47.67% oxygen.

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Answer:

Alkali metals are elements found in group 1 of the Periodic Table. Alkali metals are soft, malleable, ductile, and are good conductors of heat and electricity. They have low melting and boiling points compared to most other metals.

Answer: crystal lattice

Explanation:

Answer:

A and the next question is c

Explanation:

Edge 2020

Answer:

The seal

Explanation:

This question depicts a typical food chain, which is the linear relationship that shows the transfer of energy from one organism to another. Every food chain consists of organism in trophic levels. One organism in each trophic level. The food chain starts with a PRIMARY PRODUCER, which is the algae in this case.

The fish is the PRIMARY CONSUMER because it feeds directly on the algae (producer). The secondary consumer is the SEAL, which feeds on the fish. The summarized food chain is as follows;

Algae → Fish → Seal → Bear → Bacteria

Answer: 3 ,2, 6

Explanation:

3 Cu(NO3)2 + 2 K3PO4 → Cu3(PO4)2 + 6 KNO3

he Bohr model of the hydrogen atom states that the electron moves in a circular orbit with a radius of 5.3×10⁻¹¹m and a speed of 2.2×10⁶m/s.

In the Bohr model, electrons orbit the nucleus in specific energy levels. The radius of the orbit is determined by the energy level the electron occupies. In this case, the electron is in a specific energy level that corresponds to a circular orbit with a radius of 5.3×10⁻¹¹m. The speed of the electron in this orbit is 2.2×10⁶m/s. This means that the electron is moving at a very high speed around the nucleus.

The Bohr model helps us understand the quantized nature of electron energy levels and provides a simplified representation of the hydrogen atom. It is important to note that this model has limitations and is an approximation of the more complex behavior of electrons in atoms as described by quantum mechanics.

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Explanation:

(P1V1)/T1=(P2V2)/T2

(15X5)/297=(p2x2.5)/473

p2=47.78cmHg

The given question is based on the concept of conversion factor

1 KL = 10³ L, 1cL = 10⁻³ L, 1dL = 10⁻² L, 1 nL = 10⁻⁹ L

A conversion factor is an expression for the relationship between units that is used to change the units of a measured quantity without changing the value.

A conversion ratio (or unit factor) always equals one (1), where the numerator and the denominator have the same value expressed in different units.

Hence, The complete filled table is given as follows ;

1 KL = 10³ L,

1cL = 10⁻³ L,

1dL = 10⁻² L,

1 nL = 10⁻⁹ L

Where,

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Answer:

The answer is C. Convection.

C Covention hope it help

Answer:

an element consists of only one kind of atom.

Explanation:

Statement   which best explains the relationship between an atom and an element is that an element consists of only one kind of atom.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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The mass of the solid object which has a density of 3.26 g/ mole is 20.86 g. This is calculated from the expression of mass of the solid object.

A cylinder has been filled with 20.00 ml of water. a solid object is added to the graduated cylinder and the water level rises to the 26.40 ml. so,

Volume of water =20.00ml

Volume of water + solid Object = 26.40 ml

Volume of solid object = 26.40 - 20.00 = 6.40 ml. 

Density of solid object =3.26 g/ml

Density is the degree of how closely the mass of matter is compacted. The more compacted the mass is in relation to the amount of volume the matter occupies, the higher its density will be.  matter that has a low density, has a smaller ratio of mass per amount of volume the matter occupies.  density in kilograms per meter cubed is equal to mass in kilograms, divided by volume in meters cube.

So, Mass of solid object = density × volume =3.26× 6.40 g = 20.86 g

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A system's equilibrium will move to the right, or toward the side of the products, in accordance with Le Chatelier's principle, if more reactants are added. ... The equilibrium will move to the left if we add more product to a system, producing more reactants.

Solution: By increasing the number of reactants, the equilibrium moves to the right and in the direction of the products.

Thus, if a reactant is added, equilibrium shifts to the right, away from the reactant. Equilibrium shifts to the left, away from the product, when a product is added. If we take away the product, equilibrium returns and produces the product. Reactant is created if reactant is removed, breaking the equilibrium.

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Answer:a)No of moles of Aluminium=0.4703

b)number of aluminum atoms=2.832 x 10^23 atoms

Explanation:

a)Given that The Amount/ Mass of Aluminum is 12.69g

We know that

No of moles =Mass/ Molar mass

Molar mass of Aluminium, Al is 26.982 g/mol

No of moles =12.69g/26.982 g/mol

No of moles =0.4703

Also

b) 1  mole of aluminium must contain  6.022  x 10^23  atoms of aluminium  

which is  known as Avogadro's constant.

Therefore, 0.4703 moles will contain 0.4703 x  6.022  x 10^23  atoms =2.832 x 10^23 atoms

Answer:

Yes it’s true

Explanation:

C2H6O is the chemical formula for ethanol. carbon atoms, six moles of hydrogen atoms, and one mole of oxygen atoms.

Here 1.volume of wet, cold air = 0.63ml , 2. Hg = 724.1 torr, 3.Pcold = 724.1 - 0.620 = 723.48 torr  ,4. Vdry,cold = 126.97 mL  ,  5.Tice-water bath = 0.1 + 273.15 = 273.25 K  , 6. V2 = 93.19 mL  ,7. V2 = 174.38 mL ,8. Charles’s law states that at constant pressure, the volume of a given mass of a dry gas is directly proportional to its absolute temperature.

1. The volume of wet, cold air,  
Volume of dry air at a temperature of boiling water bath = 30 - 134/760 (28.5 - 17.5) = 30 - 1.72 = 28.28 mL.  
Volume of water vapor at the temperature of ice-water bath = 134/760 (28.5 - 15.1) = 2.09 mL.  
Therefore, Volume of wet, cold air = 30 - 28.28 - 2.09 = 0.63 mL.  

2. Conversion of barometric pressure from in. Hg to torr,  
1 in. Hg = 25.4 mm Hg (torr)  
28.5 in. Hg = 724.1 torr.  

3. Pressure of cold, dry air,  
Pcold = Pbarometric - Phydrogen  
Phydrogen = (nH2/nTotal) * Ptotal  
VH2 = (nH2 * R * Tcold) / Ptotal  
nH2 = VH2 * Ptotal / (R * Tcold)  
nTotal = (Ptotal * V) / (R * Tcold)  
Phydrogen = (VH2 * Ptotal) / V  
Phydrogen = [((nH2 * R * Tcold) / Ptotal) * Ptotal] / V  
Phydrogen = (nH2 * R * Tcold) / V  
Phydrogen = [(VH2 * Ptotal) / V] * (R * Tcold) / Ptotal  
Phydrogen = VH2 * (R * Tcold) / V  
Phydrogen = (28.28/1000) * (R * 273.1) / 0.134  
Phydrogen = 0.620 atm  
Pcold = 724.1 - 0.620 = 723.48 torr  

4. Volume of dry, cold air,  
Ptotal = Pbarometric - Phydrogen  
Vtotal = (Ptotal * V) / Pbarometric  
Vtotal = (723.48 * 134.0) / 760  
Vtotal = 127.6 mL  
Vdry,cold = Vtotal - Vwet,cold  
Vdry,cold = 127.6 - 0.63  
Vdry,cold = 126.97 mL  

5. Conversion of temperature of boiling-water and ice-water baths from Celsius to Kelvin,  
Tboiling water = 99.7 + 273.15 = 373.85 K  
Tice-water bath = 0.1 + 273.15 = 273.25 K  

6. The volume-to-temperature ratio for the volume of hot, dry air at the temperature of boiling water bath,  
V1/T1 = V2/T2  
V2 = (V1/T1) * T2  
V2 = (127.6/373.85) * 273.25  
V2 = 93.19 mL  

7. The volume-to-temperature ratio for the volume of cold, dry air at the temperature of the ice-water bath,  
V1/T1 = V2/T2  
V2 = (V1/T1) * T2  
V2 = (126.97/273.25) * 373.85  
V2 = 174.38 mL  

8. Charles’s law states that at constant pressure, the volume of a given mass of a dry gas is directly proportional to its absolute temperature. The above values verify this law since they are following this law of proportionality.

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Answer:

we get subtract from photography filter paper etc

Answer:

Based on the information provided, substance 1 has a stronger molecular attraction than substance 2. When a substance is heated, the energy that is added is used to overcome the forces that hold the molecules together. If the forces of attraction between the molecules are strong, it will take more energy to separate them and cause the substance to change phase from a solid to a liquid. Therefore, if substance 1 becomes a liquid at a lower temperature than substance 2, it must have weaker forces of attraction between its molecules, indicating that substance 2 has a stronger molecular attraction.

Explanation:

Answer:

Helium

Explanation:

To make a solution of lemonade, lemon juice and sugar are dissolved in water. the water is the Solvent in this example.

Solvent Examples. Common examples of solvents consist of water, ethanol, methanol, and acetone. The term 'solvent' may be defined as a substance that has the ability to dissolve a given solute to form a solution with it.

Solvents are substances that are used to dissolve the solutes used in the formulation. These solutes can be solids, liquids, or gaseous in nature. Thus solvents are used to get a solution upon interacting the solute with a suitable solvent.

Solvents are usually, however not usually, liquids. They can also be gases or solids. The material dissolved in the solvent is referred to as the solute. collectively, the solvent and solute comprise the solution.

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Answer:

The concentration of a conjugate base is twice that of the concentration of a conjugate acid

Explanation:

This is because at the midpoint, the number of moles of acid equals half the number of moles of base at the midpoint. This means that at the midpoint, half the analyte has been titrated.

Since the concentration of the conjugate acid is half that of the conjugate base at the midpoint, this implies that the concentration of the conjugate base is twice that of the conjugate acid.

Thus, at the midpoint of a titration curve the concentration of a conjugate base is twice that of the concentration of a conjugate acid

Answer:

D) 0.9 L

Explanation:

At constant temperature,

PV = Constant

so,

P1.V1 = P2. V2

101 × 2.1 = 235 × V2

V2 = 0.9 L

Answer:

0.9L

Explanation:

Given parameters:

Initial volume = 2.1L

Initial pressure  = 101kPa

Final pressure  = 235kPa

Unknown:

Final volume  = ?

Solution:

The relationship is between pressure and volume. To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

Mathematically;

        P₁V₁  = P₂V₂

P₁ is the initial pressure

V₁ is the initial volume

P₂ is the final pressure

V₂ is the final volume

 Now insert the parameters and solve;

        2.1 x 100 = 235 x V₂

            V₂ = 0.89L

Glycolysis involves the breakdown of one molecule of glucose into pyruvate and energy. It is the common biological process in all livings to synthesis energy.

Glycolysis is an anaerobic energy source and metabolic pathway that has evolved in nearly all organisms. Although it does not require oxygen, which is why it serves as the first step in anaerobic respiration, it is also the first step in cellular respiration.

The oxidation of glucose molecules, the single most important organic fuel in plants, microbes, and animals, is involved in the process. Glycolysis eventually breaks down glucose into two pyruvate molecules.

Pyruvate enters the citric acid cycle and undergoes oxidative phosphorylation in aerobic conditions, resulting in the net production of 32 ATP molecules.

Therefore, glycolysis involves the breakdown of one molecule of glucose into pyruvate and energy.

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The nitrogen and oxygen atoms stimulated the resonance structure of the carbon atom, which caused the carbon atom to exhibit positive electricity while concurrently exhibiting negative electricity in the nitrogen and oxygen atoms.

What is the CH3NH2's structural geometry?

Tetrahedral is the shape of the C and N atoms in the CH#NH2 molecule. The geometry of CH3NH2 is hence tetrahedral.

Are there polar bonds in CH3NH2?

(a) Both the covalent molecules CH3NH2 and CH3F have polar links. While the dipole in CH3F cannot H-bond, that in CH3NH2 can. As a result, CH3NH2 interacts more strongly and has a higher boiling point. (c) Although CH3OH and CH3CH2OH may both form hydrogen bonds, CH3CH2OH has more CH bonds, resulting in stronger interactions between dispersion force.

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Thewater of hydration x in narceine. xH₂O is 3

Given that hydrate is 10.8% by mass

molar mass = 499.52 g/mol

calculating the amount of water

mass of water = \(\dfrac{10.8 \times 499.5}{100}\)

mass of water = 53.95 g

moles of water = \(\dfrac{mass}{molar mass}\)

moles of water = \(\dfrac{53.95}{18}\) = 3

then the water of hydration x in narceine. xH₂O is 3

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Answer: Examples of pure substances include iron, aluminum, silver, and gold. Mixtures: Substances that have two or more different particles are mixtures. Examples of mixture include the salt solution which is a 'mixture' of two components, salt, and water.

Explanation:

Light makes everything visible but it allows us to see because our eyes are sensitive to light and our brains process the light signals that went into our eyes.

This is also known as visible light and it is referred to as electromagnetic radiation that can be perceived by the human eye.

It is visible by organisms because the eyes are sensitive to it such that when it hits an object, it is reflected back into our eyes, and that allows us to see the object.

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The full question;

Why does light make everything visible when it is the source of light itself or when it's blank off something else?

Explanation:

Density  =  Mass  ÷  Volume

              =  84.7 g  ÷  49.6 cm³

              =  1.71 g/cm³

Answer:

When the yeast get warm water and some food to eat (in the form of sugar), they will become active. And as they eat the sugar and break it down for food, they release carbon dioxide, which fills up the balloon. Yeast is actually a type of fungus related to mushrooms.

Hope it helps!!!

Answer:

Determine what type of yeast you have. Dried yeast comes in two basic varieties: instant and active dry. If you have instant yeast, there is no need to activate the yeast: Just mix it in with your dry ingredients. If you have active dry yeast, it helps to activate the yeast first. Determine the appropriate amount of yeast.

Explanation:

Answer: The stratosphere!!

That the pressure doubles when the gas's volume is cut in half.

If gas volume and temperature are maintained constant, the formula demonstrates that pressure and volume are inversely proportional.

This implies that if volume decreases, pressure must increase. This implies that if pressure doubles, volume must be half, and if pressure is halved, volume must be doubled in order to maintain the K value.

If the volume is doubled and the pressure is tripled, the effect on the temperature will be 3 2 = 6 times. This is because for perfect gases, the temperature is directly related to both the volume and the pressure.

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