NAME: ___________________
CHEMISTRY I
CHAPTER 9, #1
1.
What do the coefficients in a balanced chemical equation tell you about the
proportion in which the substances react?
(Questions 2-6) Given the following equation: C4H10 + O2
show what the following molar ratios should be:
2.
C4H10/O2
3.
O2/CO2
4.
O2/H2O
5.
C4H10/CO2
6.
C4H10/H2O
-----> CO2
+ H2O,
You must show your work to receive any credit. Be certain your answer contains the
correct number of significant figures, as well as the correct unit.
(Questions 7-8) Given the following reaction:
S + O2 ------> SO2
7.
How many grams of sulfur must be burned to give 100.0 grams of SO2?
8.
How many grams of oxygen will be required for the reaction in question #7 to
occur?
9.
B2O3 + Mg -----> MgO + B
How many moles of boron will be produced when 25.00 grams of magnesium
reacts with excess B2O3?
10.
KMnO4 + H2SO4 -------> K2SO4 + Mn2O7 + H2O
How many grams of Mn2O7 can be produced from 196.0 moles of KMnO4?
11.
BaO + H2SO4 ----> BaSO4 + H2O
If 81.00 grams of water is formed during this reaction, how many moles of barium
oxide was used?
(Questions 12-13) Given the following equation
C8H18 + O2 -----> CO2 + H2O
12.
If 27.3 grams of C8H18 are combusted, what mass of water will be produced?
13.
How many moles of CO2 will be produced if 150.0 grams of oxygen is combusted
with excess C8H18?
14.
NaClO3 -------> NaCl +
O2
If 12.00 moles of NaClO3 decomposes, how many grams of oxygen will be
produced?
11.
Cu + AgNO3 -------> Cu(NO3)2 + Ag
How many grams of silver will be produced if 5.78 X 1022 atoms of copper react
with excess silver nitrate?