Răspunsuri

2014-10-16T11:59:05+03:00
1        2
N2+2H2 ->2NH2
 x        5
mH2=10g=>nH2=m/M=>nH2=5 moli
nN2=2,5 moli
mN2=n*M=2,5*28=70 g

cred ca asa se face:)