#### Answer

a. 1.00 mole
b. 0.0265 mole
c. 0.0388 mole
d. 0.0270 mole

#### Work Step by Step

- Calculate or find the molar mass for the compound:
a. ( 4.00 $\times$ 1 )= 4.00 g/mol
b. ( 118.7 $\times$ 1 )+ ( 16.0 $\times$ 2 )= 150.7 g/mol
c. ( 52.0 $\times$ 1 )+ ( 1.008 $\times$ 3 )+ ( 16.00 $\times$ 3 )= 103.02 g/mol
d. ( 40.08 $\times$ 3 )+ ( 14.01 $\times$ 2 )= 148.26 g/mol
- Using the molar mass as a conversion factor, find the amount in moles:
a. $$ 4.00 \space g \times \frac{1 \space mole}{ 4.00 \space g} = 1.00 \space mole$$
b. $$ 4.00 \space g \times \frac{1 \space mole}{ 150.7 \space g} = 0.0265 \space mole$$
c. $$ 4.00 \space g \times \frac{1 \space mole}{ 103.02 \space g} = 0.0388 \space mole$$
d. $$ 4.00 \space g \times \frac{1 \space mole}{ 148.26 \space g} = 0.0270 \space mole$$