Bantuin ya pakai cara

Bantuin ya pakai cara

Penjelasan:

Ar Nitrogen = 14,01

$Ar_{Nitrogen}=frac{m}{frac{1}{12} 1 atom C-12}$

$m_{Nitrogen}=Ar_{Nitrogen}times frac{1}{12} 1 atom C-12$

$m_{Nitrogen}=14,01times frac{1}{12}times 1,99times 10^{23}\m_{Nitrogen}=2,323325times 10^{23} g$

$m_air=9g\Ar H=1; Ar O=16$

$Mr_{H_2O}=(2times 1)+(1times 16)=18$

$n=frac{m}{Mr}=frac{9}{18}=0,5 molekul$