V(PH3)-?
m(PH3)/M(PH3) = V(PH3)/Vm Vm=22.4 L/mol M(PH3)=34 g/mol
V(PH3)=m(PH3)*Vm/M(PH3)= 3.6*22.4 / 34=2.37 литров
N(PH3)= (m/M)*N(A) N(A)=6.02*10^23
N(PH3)= 3.6 / 34 * 6.02*10^23 = 0.637 *10^23 молекул
Количество атомов фосфина = 4
N(PH3)=(m/M)*N(A)*n, n=4
N(PH3)=3.6/34*6.02*10^23*4=2.55*10^23 атомов
D(H2)= M(PH3) / 2= 34/2=17
D(He)=M(PH3) / 4=34/4=8.5
D(возд)=M(PH3)/29 = 34/29=1.17
ответ
2.37 л, 0.637 *10^23 молекул , 2.55*10^23 атомов , D(H2)=17 ,
D(He)=8.5 , D(возд)=1.17