Physics question: hydrogen atoms and masses.?

Question

Determine the number of hydrogen atoms required to obtain 1.0 kg of hydrogen. A hydrogen atom has a mass of 1.0u The answer is (6.0x10^26)

Could you show me the steps involved in solving this problem?

Answer 1

if the Hydrogen atom has mass 1.0u, that means, by definition, that one mole (6.02x10^23 atoms) of atomic hydrogen has mass 1g.

So to figure out how many atoms are in 1kg, we multiply that by 1000.

6.02x10^23 * 1000 = 6.02x10^26 atoms per Kg