Answer:
N2 + 3H2 ——————→ 2NH3
Mass of hydrogen = 7.25x10^[-4] g
Change it into moles
No of moles = (mass in grams)/atomic mass
Atomic mass of hydrogen = 2 g/mol
No of moles = 7.25x10^[-4]/2
No of moles of hydrogen = 3.62x10^[-4]
According to equation
3 moles of hydrogen produce NH3 = 2 mol
1 moles of hydrogen produce NH3 = 2/3
1 moles of hydrogen produce NH3 = 0.67
3.62x10^[-4] mol hydrogen produce NH3 = 0.67 x 3.62x10^[-4] = 2.42x10^[-4]
So no of moles of NH3 = 2.42x10^[-4]
Change it into molecules
No of molecules = (no of moles)x Avogadro's number
No of molecules = 2.42x10^[-4] x 6.02x10^23
No of molecules of NH3 = 14.52x10^19
pls braineast
