Question

how many atoms are there in 52u of Helium?

Answer 1

first we will know 52u of helium contains how many no. of moles....i.e, 52÷atomic no. of helium i.e, 26 (as atomic no. of helium is 2)... now multiply the ans by avogadro no. i.e, 6.022 ×10 (raise to power 22)... and u will get the no. of atoms :)