1
xg. 60g
2H2 + O2 - > 2H2O
mO2 - 16u * 2 = 32u
mH2O - 4 * 1u + 16u * 2 = 4u + 32u = 36 u
60g - 36u
xg - 32u
x= (32u*60g)/36u = 56,5g
2
xg. 25g
2CaO -> 2Ca + O2
m2CaO - 2 * 40u + 2 * 16u = 112u
m2Ca - 2 * 40u = 80u
80u - 25g
112u - xg
x= (112u*25g)/80u = 35g