Chemistry
The mass number of a nucleus is

always less than its atomic number
a fraction
always more than the atomic weight
the sum of the number of protons and neutrons present in the nucleus

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
Kinetics is the study of:

How fast the reactions go
All of these are correct
The mechanisms and paths of the molecules take in joining from one reactant to products
The rate of chemical reaction

ANSWER DOWNLOAD EXAMIANS APP