WorksheetsCR Chapter 9 Mole & Stoich Test Review
Total questions: 27
Worksheet time: 2hrs 41mins
How many Carbon atoms are in one mole of Carbon?
6.022 x 1023
1
12.01
not enough information
How many water molecules are in 5.2 moles of water?
94
5.2
3.1 x 1024
8.6 x 10-24
What is the molar mass of aluminum nitrate?
40.99 g/mol
213.01 g/mol
88.99 g/mol
184.99 g/mol
How many moles are in 16.94g of water?
16.94
0.9403
305.2
1.063
Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?
A
B
C
D
How many grams are in 1.2 x 1024 atoms of C?
28 grams
24 grams
6.02 grams
1.2 grams
How many grams are in 3.33 mol of potassium sulfide?
367 g
454 g
238 g
132 g
Which has more molecules?
1 mole H2O
1 mole CH4
1 mole Cl2
They're are all the same.
How many molecules are in 32.4 grams of phosphorus pentoxide?
1.76 x 1023 molecules
0.29 moles
1.76 x 1022 molecules
0.29 molecules
Determine the mass of calcium hydroxide produced from 0.64 g of water.
__CaC2 + __H2O → __Ca(OH)2 + __C2H2
10 g Ca(OH)2
41 g Ca(OH)2
1.3 g Ca(OH)2
31 g Ca(OH)2
How many moles of water can be produced if 8.0 moles of oxygen gas are reacted with hydrogen gas?
Write a balanced chemical equation!
4.0 moles
8.0 moles
16 moles
2.0 moles
In the synthesis of water, what is the mole ratio of oxygen gas to water?
1:2
2:1
3:4
4:3
If 140. grams of aluminum chloride decompose when heated, how many moles of aluminum will be produced?
Write a balanced chemical equation!
5.10 moles of Al
1.05 moles of Al
2.25 moles of Al
3.42 moles of Al
12.00 moles of NaClO3 will produce how many grams of O2?
__ NaClO3 → __NaCl +__ O2
256.0 g O2
576.0 g O2
288.0 g O2
384.0 g O2
2Al + 3H2(SO4)→ Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250. grams of H2(SO4) reacted completely?
0.850 g
290. g
450. g
870. g
What is the total number of moles of water needed to make 2.5 moles of C6H12O6?
6CO2 + 6H2O → C6H12O6 + 6O2
2.5
6
12
15
Match the following with the correct conversion factor needed to solve that problem.
3.5 mol Ca = ? g Ca
Molar Mass
1.23 mol H₂ = ? molecules H₂
Avogadro's Number
2.40 mol NH₃ = ? mol N₂
Mole Ratio
You have 30.0 grams of NaCl decomposing & you need to find how many moles of sodium could be produced.
You need to convert 30.0 grams of NaCl to (a) of NaCl using (b) from the periodic table then you can convert to moles of sodium using the (c) from the balanced equation.
moles
molar mass
mole ratio
Label the conversion factors used in this gram to gram stoichiometry set up.
How do you find the molar mass for an element?
Molar mass is the same as atomic mass on periodic table, only in grams
You convert into molar mass from a mass given to you
You can only be given molar mass, it can't be calculated
It is equal to Avogadro's Number
What is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?
62.43 g
116.39 g
133.33 g
53.5 g
Which list of number of atoms in Mg(NO3)2 is right?
Mg : 1
NO : 6
Mg : 1
N : 6
O : 6
Mg : 1
N : 1
O : 5
Mg : 1
N : 2
O : 6
Balance this equation: Li + Cl2 → LiCl
2Li + Cl2 → 4LiCl2
2Li + Cl2 → LiCl2
2Li + Cl2 → 2LiCl
2Li + 2Cl2 → 2 LiCl2
Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO2?"
1 mol = 22.4 L
1 mol = 44.01 g
1 mol = 6.022x1023 molecules
more than one
If you start with compounds of NaOH and are going to moles of NaOH, how many unit conversion steps are needed?
1
2
3
4
Any time you get grams off the periodic table, the other part of the equation is
1 mole
grams
moles from balanced equation
moles from the problem
The numbers for the mole ratio (middle step of gramsA to gramsB) come from
periodic table
Avogadro's number
number of moles from coefficients in a balanced equation
moles given in the problem
