Answer
a. 1.24 mole
b. 0.781 mole
c. 0.321 mole
d. 0.106 mole
Work Step by Step
- Calculate or find the molar mass for the compound:
a. ( 20.18 $\times$ 1 )= 20.18 g/mol
b. ( 16.0 $\times$ 2 )= 32.0 g/mol
c. ( 26.98 $\times$ 1 )+ ( 1.008 $\times$ 3 )+ ( 16.0 $\times$ 3 )= 78.00 g/mol
d. ( 69.72 $\times$ 2 )+ ( 32.06 $\times$ 3 )= 235.62 g/mol
- Using the molar mass as a conversion factor, find the amount in moles:
a. $$ 25.0 \space g \times \frac{1 \space mole}{ 20.18 \space g} = 1.24 \space mole$$
b. $$ 25.0 \space g \times \frac{1 \space mole}{ 32.0 \space g} = 0.781 \space mole$$
c. $$ 25.0 \space g \times \frac{1 \space mole}{ 78.00 \space g} = 0.321 \space mole$$
d. $$ 25.0 \space g \times \frac{1 \space mole}{ 235.62 \space g} = 0.106 \space mole$$
