Question

Select the correct answer.

Answer 1

Answer:

146

Explanation:

Answer 2

Answer: C.   146 g

Explanation:

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{ mass}}{\text{Molar mass}}$  

Thus  $Mass=\text{Number of moles}\times {\text{Molar mass}}$  

For sodium nitrate $(NaNO_3)$

moles = 1.72

Molar mass of sodium nitrate  $(NaNO_3)$= 85g/mol

Putting values in above equation, we get:

$Mass=1.72moles\times 85g/mol=146g$