Grams/Moles Calculations
Convert the following masses to moles. Remember to include units!
Step 1: Find out the molar mass of the molecule
Step 2: Given mass ÷ Molar mass
1) 30 grams of H3PO4
Molar mass
2)
25 grams of HF
Molar mass
3)
Mass to Moles
110 grams of NaHCO3
Molar mass
4)
Mass to Moles
Mass to Moles
1.1 grams of FeCl3
Molar mass
© 2000 Cavalcade Publishing – All Rights Reserved
Mass to Moles
For chemistry help, visit http://www.chemfiesta.com
5)
987 grams of Ra(OH)2
Molar mass
6)
564 grams of copper
Molar mass
7)
Mass to Moles
12.3 grams of CO2
Molar mass
8)
Mass to Moles
Mass to Moles
89 grams of Pb(CH3COO)4
Molar mass
© 2000 Cavalcade Publishing – All Rights Reserved
Mass to Moles
For chemistry help, visit http://www.chemfiesta.com
Convert the following moles to mass. Remember to include units!
Step 1: Find out the molar mass of the molecule
Step 2: Molar mass x number of moles
:
9)
4 moles of Cu(CN)2
Molar mass
10)
5.6 moles of C6H6
Molar mass
11)
Moles to Mass
21.3 moles of BaCO3
Molar mass
12)
Moles to Mass
Moles to Mass
1.2 moles of (NH4)3PO3
Molar mass
© 2000 Cavalcade Publishing – All Rights Reserved
Moles to Mass
For chemistry help, visit http://www.chemfiesta.com
13)
9.3 moles of SmO
Molar mass
14)
6.6 moles of ZnO
Molar mass
15)
Moles to Mass
5.4 moles of K2SO4
Molar mass
16)
Moles to Mass
Moles to Mass
88.4 moles of NI3
Molar mass
© 2000 Cavalcade Publishing – All Rights Reserved
Moles to Mass
For chemistry help, visit http://www.chemfiesta.com