Name________________________
per_______________
date__________
Mole Summary Worksheet
Use your class notes and your chemsaver to answer the following questions. You need
to calculate AT LEAST 3 whole problems in order to receive credit.
1. When sodium chloride reacts with silver nitrate, silver chloride
precipitates
NaCl
+
AgNO3 
NaNO3
+ AgCl
a) Show that this equation is already balanced.
b) Calculate the molar mass for each substance.
c) A student has 100g of NaCl. How many moles is this?
d) How many moles of AgCl will precipitate if all of the 100g of NaCl reacts?
e) How many grams of AgCl is this?
f)
A student wants to make 100g of AgCl. How many grams of NaCl should she
use?
g) A student wants to make 100g of AgCl. How many grams of AgNO 3 should she
use?
h) A student made 100g AgCl. How many grams of NaNO3 is produced with it?
Name________________________
per_______________
date__________
2. Laughing gas (nitrous oxide) is sometimes used as an anesthetic in
dentistry. It is produced by the decomposition of ammonium nitrate:
NH4NO3 (s)

N2O(g) +
2H2O (l)
a) Calculate the molar mass of each substance.
b) How many grams of NH4NO3 are required to produce 33.0g of N2O?
c) How many grams of H2O are produced with 33.0g of N2O?
d) How many moles of H2O are produced with 33.0g of N2O?
e) How many molecules of H2O are produced with 33.0g of N2O?
3. In a spacecraft, the carbon dioxide exhaled by astronauts can be removed
by its reaction with lithium hydroxide, LiOH according to the following
equation:
CO2(g)
+
2LiOH (s)

Li2CO3 (s)
+
H2O (l)
a) A spaceship has 1000g of LiOH. How many moles is this?
b) How many moles of CO2 are needed to react with 1000g of LiOH?
Name________________________
per_______________
date__________
c) How many grams of CO2 are needed to react with 1000g LiOH?
d) The average person exhales 20 mol of CO2 per day. How many moles of
LiOH are needed to react with this?
e) How many grams of CO2 are exhaled per person per day?
f)
How many molecules of CO2 are in 100g of CO2?
g) Challenge: If 1 mole of CO2 occupies a volume of 22.4 liters, what would be
the volume of CO2 needed to react with 1000g LiOH.
h) Challenge: How many days would the 1000g of LiOH last on a spaceship
with 2 astronauts?
4. Tin (II) Fluoride is used in some toothpastes. It is made by the reaction of
tin with hydrogen fluoride.
Sn(s)
+
2HF (g)

SnF2 (s) +
H2 (g)
a) An average tube of toothpaste contains 1 gram of tin (II) fluoride. How many
moles is this?
Name________________________
per_______________
date__________
b) How many moles of HF are needed to produce 1 gram of tin (II) fluoride?
c) How many grams of tin are needed to produce 100 grams of tin (II) fluoride?
d) How many molecules of HF are in 100g of HF?
e) How many molecules of hydrogen are produced when 250 g of tin is fully
reacted?
f)
Challenge: A manufacturer has 50g of HF and 50g of tin. Which ‘ingredient’
will be used up first? Which one will be left over? How much tin (II) fluoride
can be produced?
5. The first step in the industrial manufacture of nitric acid is the catalytic
oxidation of ammonia.
____NH3(g)
+
___O2(g) 
___NO(g)
+
___H2O(g)
a) Balance the equation, and calculate all molar masses.
b) The reaction is run with 824g of NH3 and excess oxygen. How many grams of
NO are produced?