Download Slide 1 - Mrs. Reed Science Classes

How many liters of chlorine gas can be
produced when 0.98 L of HCl react with excess
O at STP?
4HCl(g) + O(g)  2Cl(g) + 2H2O(g)
a.
b.
0.98 L
0.49 L
c.
d.
3.9 L
2.0 L
Which coefficients correctly
balance the formula ?
NH4NO2  N2 + H20
a. 1,2,2
b. 1,1,2
c. 2,1,1
d. 2,2,2
After calculating the amount of reactant B
required to completely react with A, then
comparing that amount with the amount
of B available, one can determine the
a. limiting reactant.
b. rate of the reaction.
c. energy released in the reaction.
d. pathway of the reaction.
For the reaction represented by the
equation CH4 + 2O2  CO2 + 2H2O, how
many moles of carbon dioxide are produced
from the combustion of 100. g of methane?
a. 6.23 mol
c. 12.5 mol
b. 10.8 mol
d. 25 mol
How many grams of H3PO4 are produced
when 10.0 moles of water react with an
excess of P4O10?
P4O10 + 6H2O  4H3PO4
a.
b.
1.22 g
6.7 g
c.
d.
147 g
653 g
For the reaction represented by the equation
Mg + 2HCl  H2 + MgCl2, calculate the
percentage yield of magnesium chloride if 100.
g of magnesium react with excess hydrochloric
acid to yield 330. g of magnesium chloride.
a. 71.8%
c. 81.6%
b. 74.3%
d. 84.2%
The Haber process for producing ammonia
commercially is represented by the equation
N2(g) + 3H2(g)  2NH3(g). To completely
convert 9.0 mol hydrogen gas to ammonia
gas, how many moles of nitrogen gas are
required?
a. 1.0 mol c. 3.0 mol
b. 2.0 mol d. 6.0 mol
What is the maximum possible amount of
product obtained in a chemical reaction?
a. theoretical yield
c. mole ratio
b. percentage yield
d. actual yield
For the reaction represented by the equation
CH4 + 2O2  2H2O + CO2, calculate the
percentage yield of carbon dioxide if 1000. g of
methane react with excess oxygen to produce
2300. g of carbon dioxide.
a.
b.
83.88%
89.14%
c.
d.
92.76%
96.78%
In the reaction represented by the equation
2Al2O3  4Al + 3O2, what is the mole ratio of
aluminum to oxygen?
a.
b.
10:6
3:4
c.
d.
2:3
4:3
The coefficients in a chemical equation
represent the:
a.masses, in grams, of all reactants and
products.
b.relative numbers of moles of reactants and
products.
c.number of atoms in each compound in a
reaction.
d.number of valence electrons involved in the
reaction.
A balanced chemical equation allows one to
determine the
a.
b.
c.
d.
mole ratio of any two substances in the
reaction.
energy released in the reaction.
electron configuration of all elements in
the reaction.
mechanism involved in the reaction.
To balance a chemical equation, it may be
necessary to adjust the
a.coefficients.
b.subscripts.
c.formulas of the products.
d.number of products.
A chemical equation is balanced when the
a. coefficients of the reactants equal the
coefficients of the products.
b. same number of each kind of atom
appears in the reactants and in the
products.
c. products and reactants are the same
chemicals.
d. subscripts of the reactants equal the
subscripts of the products.
In what kind of reaction do two or more
substances combine to form a new
compound?
a.decomposition reaction
b.combustion reaction
c.double-displacement reaction
d.synthesis reaction