⚠️⚠️ Janice is confused she says that to calculate the volume of a substance she can multiply the density by the mass explain what Janice is doing wrong and demonstrate the correct way to solve for volume using density and mass ⚠️⚠️ PLEASE HELP

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?