Question

Choose the correct option.

How many g of H₂O are present in 0.25 mol of it?

Options

• 4.5

• 18

• 0.25

• 5.4

Answer 1

4.5

Explanation:

Mass of water = 0.25 mol

We know the molecular mass of water (M) = 18

No. of grams (W) = ?

No. of moles = `"W"/"M"`

W = No. of moles × M

W = 0.25 × 18

W = 4.5 gm