A 25.0 L solution is made of 0.10 M acid and 0.13 M conjugate base. What mass of HNO 3 (MM= 63.01) in grams can the buffer absorb before one of the components is no longer present?

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

Is there any options, for this

Ithink the answer is d.