Question

do the question of attachment-​

Answer 1

Explanation:

Answer is in the attachment

Hope it helps you

Answer 2

Density = 1.40 g/l

Volume of 1 mol NaOH = 22.4 l

Volume of 4 mol = 22.4 *4 = 89.6 l

..

Mass/ volume = density

Mass = 1.40 * 89.6 g

= 0.125 kg

.

Molality = 4/0.125

= 32 mol/kg