Question

va rog. repede coroana :calculează compoziția procentuala a :acid sulfuric, dioxid de calciu, sulfat de fier(|||) ​

Answer 1

H2SO4

-se calc. masa molara

M=2+ 32  + 4.16=98---------> 98g/moli

98g H2SO4-------------2g H-------------32gS-------------64g O

100 g--------------------------x---------------------y----------------z

x=100 . 2 : 98=

y=100.32 : 98=

z=100.64 : 98=

CaO

M=40+16=56------->56g/moli

56gCaO----------------40g Ca ----------------16gO

100g-----------------------x-------------------------y

x=100.40: 56=

y=100.16 :56=

Fe2(SO4)3

M=2.56 + 3.32 + 12.16=112 +96 +192

   =400--------->400g/moli

400g Fe2 ( SO4 )3--------112g Fe--------96g------------192 gO

100 g---------------------------x--------------------y----------------z

x=100.112 : 400=

y=100.96 : 400=

z=100.192 : 400=