Question

1. Cate grame de hidrogen se vor gasi in 90 de grame H2O.
2. Cate grame de oxigen,hidrogen,sulf se vor afla in 10 moli H2SO4.
3. Cate grame de hidrogen si oxigen se vor afla in 15 Na molecule Al(Oh)3.
Va rogg mult!

Answer 1

1. Masa H2O=2*AH +AO=2*1+16=2+16=18g/mol
deci in 18g H2O sunt 2g H
            90g.................x
x=2*90/18=180/18=10G
2. Masa H2SO4=2*1+32+4*16=2+32+64=98g/mol
Masa a 10 moli H2S04=10*98=980
2....32....64.....98
h.....s.....o.......980
h=980*2/98=20g H
s=980*32/98=320g S
o=980*64/98=640g O