Why low of conservation of mass is not applicable to nuclear reactions?

What is Q value of a nuclear reaction?

Is it correct to consider the law of conservation of mass as the law of mass as the law of indestructibility of matter?

Why Raoults law for relative lowering of vapour pressure is not applicable for concentrate solution?

Who discovered the law of conservation of mass?

Why is the term 'molecularity ' not applicable for complex reactions ?

In which case Raoult's low is not applicable ?

Explain why dalton's law of partial pressures is not applicable to a mixture of NH_(3) and HCl gases.

Explain why Dalton's law of partial pressure is not applicable to a gaseous mixture of NH_3 and HCl.

Explain nuclear fission with a suitable nuclear reaction.