Question

Which of the following is the best example of law of conservation of mass?
(a) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO₂
(b) When 12 g of carbon is heated in a vacuum there is no change in mass
(c) A sample of air increases in volume when heated at constant pressure but its mass remains unaltered
(d) The weight of a piece of platinum is the same before and after heating in air

Answer 1

option (a).

This is because when 12 g of carbon combines with 32g of oxygen, then 44g of CO2 is formed.

The total mass of the reactants= mass of the product

12+32=12+2*16(1*C+2*O)

12+32=12+32

44=44

Answer 2

Answer:

when put first value of 12 and second value put 32 then addition and answer is 44g