Answer
a. 0.624 mole
b. 0.156 mole
c. 2.22 moles
d. 3.125 moles
Work Step by Step
- Calculate or find the molar mass for the compound:
a. ( 40.08 $\times$ 1 )= 40.08 g/mol
b. ( 32.06 $\times$ 1 )= 32.06 g/mol
c. ( 1.008 $\times$ 2 )+ ( 16.00 $\times$ 1 )= 18.02 g/mol
d. ( 16.00 $\times$ 2 )= 32.00 g/mol
- Using the molar mass as a conversion factor, find the amount in moles:
a. $$ 25.0 \space g \times \frac{1 \space mole}{ 40.08 \space g} = 0.624 \space mole$$
b. $$ 5.00 \space g \times \frac{1 \space mole}{ 32.06 \space g} = 0.156 \space mole$$
c. $$ 40.0 \space g \times \frac{1 \space mole}{ 18.02 \space g} = 2.22 \space moles$$
d. $$ 100.0 \space g \times \frac{1 \space mole}{ 32.00 \space g} = 3.125 \space moles$$
