物质的量的几个公式要熟悉n= N/NA = m/M = V/Vm .
m(N2)=n*M =(V/Vm )* M = (8.96/22.4)*28 = 11.2 g
N(N2)= n *NA=(V/Vm )* NA=0.4NA
N(N)=2*N(N2)=2*0.4NA=0.8NA
物质的量的几个公式要熟悉n= N/NA = m/M = V/Vm .
m(N2)=n*M =(V/Vm )* M = (8.96/22.4)*28 = 11.2 g
N(N2)= n *NA=(V/Vm )* NA=0.4NA
N(N)=2*N(N2)=2*0.4NA=0.8NA