Question

Number of atoms in 1ml of ammonia gas at stp is

Answer 1

So 1 ml has 1/22400 moles at STP.1 mole = 6.022 x 1023 molecules. So number of molecules of ammonia in 1 ml = 6.022 x 1023/22400. Now, multiply this number by 4 to get the total number of atoms as each molecule of ammonia has 4 atoms ( 1 N and 3 H). Therefore, 1ml oh NH3 contains 1.075 x 1020atoms at STP.