Chemistry

For the reaction represented by the equation CH4 + 2O2 > CO2 + 2H2O, how many moles of carbon dioxide are produced from combustion of 100 g of methane?

6.23 mol

The reaction represented by the equation Pb(NO3)2 + 2KI> PbI2 + 2KNO3 is a

Double displacement reaction

The equation AX + BY > AY + BX is the general equation for a

Double-displacement reaction

In writing a chemical equation the produces hydrogen gas, the correct representation of hydrogen gas is

H2

Which reactant controls the amount of product formed in a chemical reaction?

Limiting reactant

A chemist interested in the efficiency of a chemical reaction would calculate the

Percentage yield

What is the study of the mass relationships among reactants and products in a chemical reaction?

Reaction stoichiometry

When the limiting reactant in a chemical reaction is completely used, the

Reaction stops

The coefficients in a chemical equation represent the

Relative numbers of miles of reactants and products

The reaction represented by the equation Mg + 2HCl > H2 + MgCl2 is a

Single displacement reaction

The equation A + BX -> AX + B is the general equation for a

Single-displacement reaction

In what kind of reaction do two or more substances combine to form a new substance?

Synthesis reaction

The equation A + X > AX is the general equation for a

Synthesis reaction

The reaction represented by the equation 2Mg + O2 > 2MgO is a

Synthesis reaction

Which of the following would not be studied in the branch of chemistry called stoichiometry?

The amount of energy required to break the ionic bonds in calcium fluoride

In a chemical reaction

The mass of the reactants equals the mass of the products

What is the maximum possible amount of product obtained in a chemical reaction?

Theoretical yield

In an equation, the symbol for a substance in water solution is followed by

aq

To balance a chemical equation, it may be necessary to adjust the

coefficients

Which coefficients correctly balance the formula equation CaO + H2O > Ca(OH)2

1, 1, 1

Which coefficients correctly balance the formula equation NH4NO2 > N2 + H2O

1, 1, 2

For the reaction represented by the equation 2H2 + O2 > 2H2O, how many grams of water are produced from 6 mol of hydrogen?

108 g

For the reaction represented by the equation cl2 + 2KBR > 2KCl + Br2 how many grams of potassium chloride can be produced from 300 g each of chlorine and potassium bromide?

188 g

In the reaction represented by the equation N2 + 3H2 > 2NH3 what is the mole ratio of nitrogen to ammonia?

1:2

What mass of ozone will form from the reaction of 2 g of NO2 in a cars exhaust and excess oxygen?

2.1 g O3

For the reaction represented by the equation 2Na + 2H2O > 2NaOH + H2, how many grams of hydrogen are produced if 120 g of sodium and 80 g of water are available?

4.5 g

How many moles of oxygen are produced when 3.0 mol of KClO3 decompose completely?

4.5 mol

In the reaction represented by the equation 2AL2O3 > 4Al+ 3O2 what's is the mole ratio of aluminum to oxygen?

4:3

When the equation Fe3O4 + Al > Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?

9

For the reaction represented by the equation SO3 + H2O > H2SO4, calculate the percentage yield if 500 g of sulfur trioxide react with excess water to produce 575 g of sulfuric acid

93.9%

1what is the small whole number that appears in front of a formula in a chemical equation?

A coefficient

When a solid produced by a chemical reaction separates from the solution it is called

A precipitate

What is the measured amount of a product obtained from a chemical reaction?

Actual yield

To determine the limiting reactant in a chemical reaction, one must know the

Available amount of each reactant

Which observation does not indicate that a chemical reaction has occurred?

Change in total mass of substances

What is the study of the mass relationships of elements in a new compound?

Co position stoichiometry

In what kind of reaction does a single compound produce two or more simpler substances?

Decomposition reaction

The equation AX > A+ X is the general equation for a

Decomposition reaction

The reaction represented by the equation 2HgO > 2Hg + O2 is a

Decomposition reaction

A chemical equation is balanced when the

same number of each kind of atom appears in the reactants and in the products