Melting point- the temperature at which a substance has changed from a solid to a liquid
freezing- the temperature at which a substance chanes from liquid to a solid
boiling point- the temperature at which a substance changes from a liquid to a gas phase
HCl + NaOH ---> NaCl + H20
If you follow guidance from other questions I have already answered for you, you will see that the above equation is balanced as it is.
Mg0 + NacI, hope it helps ffammmm!!!!
1. B, helium
2. B, carbs-lipids-nucleic acids-proteins
hope I helped