Răspuns:
CaSO4 Ca: S:O=1 : 1 :4
Explicație:
m,Ca:mS:mO= 40g:32g:4x16g
=5 :4:8
M,=(40+32+64)g/mol=138g/mol
138g sulfat.........40gCa
100g.....................x x= 40x100/138%Ca=...............calculeaza !
1molCaO+2molCa(OH)2--> amestecul contine 3molCa
M,CaO= 56g/mol
M,Ca)OH)2=74g/mol
(56+74)gamestec...............3x40gCa
100g...............................................x= 100x120/130 %Ca=.....................calculeaza !!!!
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