Question

calculate the mass of the reactants and the products of the following chemical equation.
C+ O2-------------->Co2

Answer 1

Reactants Mass = Mass of 1 mole of C + Mass of 1 mole of O2

= 12g + 16*2 g

= 44 g

Products Mass = Mass of 1 mole of CO2

= (12+ 16*2) g

= 44 g

Hence, we see that law of conservation of mass is not voilated here.