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