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Answer 1 · 2016-09-29T08:47:24

We know molar mass of Hydrogen is #=2g/"mol"#

The amount of hydrogen given is #=4.47xx10^-4g= (4.47xx10^-4g)/(2g/"mol")#
#=2.235xx10^-4mol#

The equation of the reaction

#N_2 + 3H_2 -> 2NH_3#

As per this equation

3 moles #H_2# produces 2 moles #NH_3#

So
# 2.235xx10^-4mol# H_2 will

produce # 2/3xx2.235xx10^-4mol NH_3#

# =2/3xx2.235xx10^-4xx6.023xx10 ^23 " molecules "NH_3#

#~~8.97xx10^23 " molecules " NH_3#