Question

how many hydrogen atoms are there in 25g of nh4cl

Answer 1

mNH₄Cl: 14g+(1g×4)+35,5g = 53,5 g/mol
1 mol of NH₄Cl (53,5g) contains 4 moles of hydrogen.

4 mol H ------ 53,5g
X --------------- 25g
X = 1,87 mol H

6.02×10²³ ----- 1 mol
X ----------------- 1,87 mol
X = 11,2574×10²³ atoms H

Answer 2

There are 100 Hydrogen atoms.