Question

Give an example of a chemical or physical process that illustrates the law of conservation of mass.

Answer 1

Answer:

In a chemical reaction

the mass of reactant is always equal to mass of product

for example

if u prepare water by adding hydrogen and oxygen gas u will get equation

$H_{2}  + O_{2}  = H_{2}O$

in this eq mass of hydrogen H is 2gm and of oxygen O is 16gm

water is 18 gm

H + O = H2O

2 + 16 = 18

which proves this chemically

for physical process if we take a candle and cover it with a glass it releases some gas but after some time it stops burning if we cal. the mass of candle after burning with the gas in the glass it would be equal to the mass of candle before burning