Question

What is the mass of 0.25 moles of water? Question 7 options: C 0.258 C4.58 C188 128

Answer 1

Answer:

4.5 g

Explanation:

Given,

Moles of water = 0.25 moles

Molar mass of water ($H_2O$) = $2\times 1+1\times 16$ = 18 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$0.25\ moles= \frac{x}{18\ g/mol}$

Mass of water in 0.25 moles = 4.5 g