Question

Select the correct answer.

What is the mass of 1.72 moles of sodium nitrate? Use the periodic table and the polyatomic ion resource.

A.
85.0 g
B.
91.2 g
C.
146 g
D.
273 g

Answer 1

146

Step-by-step explanation:

Answer 2

Answer: C. 146 g

Step-by-step 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}* {\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* 85g/mol=146g`