Gu khayo bhana m hunxa hola​

What is the mass of 4 molecules of co2

Ineed to find the answer of this question because i dont understand it

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?