Gram to Mole
How many moles are in 18 g H2O?
1 mol
Work:
Molar mass H = 1.01 x 2 = 2.02 g/mol
O = 16.00 g/mol
18 g x (1 mol/18 g) = 1 mol
How many molecules are in 1 mol CO2?
6.02 x 1023 molecules
Work:
Molar mass C = 12.01
O = 16.00 x 2 = 32.00
Total = 44.01 g/mol
1 mol x 6.022 x 1023 molecules/mol = 6.022 x 1023 molecules
How many molecules are in 18 g H2O?
6.02 x 1023 molecules
Work:
Molar mass H = 2.02
O = 16.00
Total = 18.02 g/mol
18 g x (1 mol/18.02 g) = 1.00 mol
1.00 mol x 6.022 x 1023 = 6.022 x 1023
How many grams are in 0.5 mol O2?
16 g
Work:
Molar mass O = 16.00 x 2
Total = 32.00 g/mol
0.5 mol x 32 g/mol = 16 g
How many molecules are in 0.25 mol CO2?
1.505 x 1023 molecules
Work:
Molar mass C = 12.01
O = 16.00 x 2 = 32.00
Total = 44.01 g/mol
0.25 x 6.022 x 1023 = 1.506 x 1023 molecules
How many grams are in 2 mol H2O?
36 g
Work:
Molar mass H = 1.01 x 2 = 2.02
O = 16.00
Total = 18.02 g/mol
2 mol x 18.04 g/mol = 36.04 g
How many molecules are in 2 mol NH3?
1.204 x 1024 molecules
Work:
Molar mass N = 14.01
H = 1.01 x 3 = 3.03
Total = 17.04 g/mol
2 x 6.022 x 1023 = 1.204 x 1024 molecules
How many molecules are in 44 g CO2?
6.02 x 1023 molecules
Work:
Molar mass C = 12.01
O = 32.00
Total = 44.01 g/mol
44 g ÷ 44.01 g/mol = 1 mol
1 x 6.022 x 1023 = 6.022 x 1023 molecules
How many moles are in 58.5 g NaCl?
1 mol
Work:
Molar mass Na = 22.99
Cl = 35.45
Total = 58.44 g/mol
58.5 g x (1 mol/58.44 g) = 1.00 mol NaCl
How many grams are in 4 mol NH3?
68 g
Work:
Molar mass N = 14.01
H = 1.01 x 3 = 3.03
Total = 17.04 g/mol
4 mol x 17.04 g/mol = 68.16 g
How many moles are in 88 g CO2?
2 mol CO2
Work:
Molar mass C = 12.01
O = 16.00 x 2 = 32.00
Total = 44.01 g/mol
88 g x (1 mol/44 g) = 2 mol
How many moles are in 1.204 x 1024 molecules H2O?
2 mol
Work:
Molar mass H = 1.01 x 2 = 2.02
O = 16.00
Total = 18.02 g/mol
1.204 x 1024 ÷ 6.022 x 1023 = 2 mol
How many grams are in 3.01 x 1023 molecules O2?
16 g
Work:
Molar mass O = 16.00 x 2
Total = 32.00 g/mol
3.01 x 1023 ÷ 6.022 x 1023 = 0.5 mol
0.5 x 32.00 = 16.0 g
How many molecules are in 4 mol H2O?
2.408 x 1024 molecules
Work:
Molar mass H = 1.01 x 2 = 2.02
O = 16.00
Total = 18.02 g/mol
4 mol x 6.022 x 1023 molecules/mol = 2.409 x 1024 molecules
How many molecules are in 117 g NaCl?
1.204 x 1024 molecules
Work:
Molar mass Na = 22.99
Cl = 35.45
Total = 58.44 g/mol
117 g x (1 mol/58.44 g) = 2.00 mol
2.00 mol x 6.022 x 1023 = 1.204 x 1024 molecules
How many grams are in 3 mol NaCl?
175.5 g NaCl
Work:
Molar mass Na = 22.99
Cl = 35.45
Total = 58.44 g/mol
3 mol x 58.44 g/mol = 175.32 g
How many molecules are in 0.5 mol O2?
3.01 x 1023 molecules
Work:
Molar mass O = 16.00 x 2
Total = 32.00
0.5 x 6.022 x 1023 = 3.011 x 1023 molecules
How many molecules are in 36 g H2O?
1.204 x 1024 molecules
Work:
Molar mass H = 2.02
O = 16.00
Total = 18.02 g/mol
36 ÷ 18.02 = 2 mol
2 x 6.022 x 1023 = 1.204 x 1024
How many grams are in 3 mol CO2?
132.03 g
Work:
Molar mass C = 12.01
O = 16.00 x 2 = 32.00
Total = 44.01 g/mol
3 mol x 44.01 g/mol = 132.03 g
How many grams are in 1.806 x 1024 molecules H2O?
54.06 g
Work:
Molar mass H = 1.01 x 2 = 2.02
O = 16.00
Total = 18.02 g/mol
1.806 x 1024 molecules ÷ 6.022 x 1023 = 3.00 mol
3.00 mol x 18.02 g/mol = 54.06 g
How many moles are in 196 g H2SO4?
2 mol
Work:
Molar mass H = 1.01 x 2 = 2.02
S = 32.07
O = 16.00 x 4 = 64.00
Total = 98.09 g/mol
196 g x (1 mol/98.09 g) = 2 mol
How many moles are in 3.01 x 1024 molecules CO2?
5 mol
Work:
Molar mass C = 12.01
O = 32.00
Total = 44.01 g/mol
3.01 x 1024 ÷ 6.022 x 1023 = 5 mol
How many grams are in 1.204 x 1024 molecules CO2?
88 g
Work:
Molar mass C = 12.01
O = 32.00
Total = 44.01 g/mol
1.204 x 1024 ÷ 6.022 x 1023 = 2 mol
2 x 44.01 = 88.02 g
How many moles are in 90 g H2O?
4.99 mol
Work:
Molar mass H = 1.01 x 2 = 2.02
O = 16.00
Total = 18.02 g/mol
90 g x (1 mol/18.02 g) = 4.99 mol
How many molecules are in 98 g H2SO4?
6.02 x 1023 molecules
Work:
Molar mass H = 1.01 x 2 = 2.02
S = 32.07
O = 16.00 x 4 = 64.00
Total = 98.09 g/mol
98 g x (1 mol/98.09 g) = 1.00 mol
1.00 mol x 6.022 x 1023 = 6.022 x 1023 molecules