Question

For an experiment, you need to dissolve 0.10 mole of NaCl in 1 liter of water.

How much NaCl must you weigh out?

Responses

0.14 g
0.14 g

3.2 g
3.2 g

5.8 g
5.8 g

8.2 g

Answer 1

Molar mass NaCl ≈ 22.99 + 35.45 = 58.44 g/mol.
Mass = moles × molar mass = 0.10 mol × 58.44 g/mol = 5.844 g ≈ 5.8 g.

Answer: 5.8 g