WorksheetsUnit 7 Test: The Mole - 8th Period
Total questions: 10
Worksheet time: 50mins
Find the molar mass of MgSO₄. You must show your work on your paper.
120 g/mol
118 g/mol
115 g/mol
125 g/mol
Find the molar mass of CaCO₃. You must show your work on your paper.
68 g/mol
100 g/mol
217 g/mol
99 g/mol
What is the mass of 6 moles NaOH? Hint: This is a one-step problem. You are going from moles to grams. Don’t forget to find the molar mass. Use your mole map.
120 grams
240 grams
360 grams
480 grams
How many molecules (atoms/particles) are in 54 moles of MgO? You must show your work on your paper.
3.25 E 25 molecules
3.25 E 24 molecules
3.25 E 23 molecules
3.25 E 22 molecules
Convert 8.4 grams of O₂ to moles. Hint: This is a one-step problem. You are going from grams to moles. Don’t forget to find molar mass. Use your mole map. You must show all of your work on your paper.
0.2625 moles
0.525 moles
0.105 moles
0.210 moles
Find the mass (grams) of 4.00 x 10²¹ molecules of N₂. Hint: You are going from atoms to grams. This is a two-step problem. You must show all of your show on the paper.
0.186 grams
0.232 grams
0.372 grams
0.464 grams
How many atoms are in 5.78 grams of NO₂? This is a two step problem. You must show all of your work on your paper.
1.23 E 23 atoms
2.34 E 23 atoms
3.45 E 23 atoms
7.56 E 22 atoms
Find the percent composition of Na₃PO₄. You must show all of your work on your paper.
Na% = 14
P% = 19
O% = 40
Na% = 45
P% = 18
O% = 37
Na% = 50
P% = 20
O% = 30
Na% = 42
P% = 19
O% = 39
Find the percent composition of H₃SO₄. You must show all of your work on your paper.
H% = 2
S% = 65
O% = 33
H% = 30
S% = 32
O% = 38
H% = 3
S% = 32
O% = 65
H% = 2
S% = 58
O% = 40
Find the percent composition of Na(OH)₂. You must show all of your work on your paper.
Na% = 45
O% = 30
H% = 25
Na% = 70
O% = 24
H% = 6
Na% = 58
O% = 40
H% = 2
Na% = 40
O% = 56
H% = 4
