Conservation of Mass (Quantitative Chemistry)

Question 1

What is the conservation of mass?

Answer 1

The total mass of the products is equal to the total mass of the reactants.

Question 2

Relative formula mass of CO2

Answer 2

(12 x 1) + (16 x 2) = 44

Question 3

What is the relative atomic mass
25% of chlorine atoms have a mass of 37
75% of chlorine atoms have a mass of 35

Answer 3

(25/100 x 37) + (75/100 x 35)

= 35.5