please help. also, when ice melts? what types of forces are being broken? inter or intra? how do you know?

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

What is i fracture in the crust called when land move up, down or sideways