Answer :
[tex]M\ N_2=28g/mol\\
63,8\%--28g\\
100\%--x\\
x=43,89g[/tex]
43,89g≈44g
44g == 2x 14g (N) + 1x 16x(O)
M N₂O = 44g
43,89g≈44g
44g == 2x 14g (N) + 1x 16x(O)
M N₂O = 44g