Sodium reacts with chlorine gas to produce sodium chloride if 10 moles of chlorine reacts with 5 moles of sodium, which reactant will be the limiting reactant

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

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?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?