Question

An atom of element x weighs 6.64 × 10^-23 . Calculate the no. of moles in 40000 gm of it.

Answer 1

moles=given weight/molecular weight;

therefore,

40000/6.64*10^-23;

the answer will be approx..

6,024.0963855421686746987951807229*10^23;

6,024*10^23