1*0.25=250
M(AL2O3)=27*2+16*3=54+48102
102-54 AL
250-x
x=250*54:102=132.4кг АL
102-48
x=250*48:102=118кг O
250-100%
132.4-x
x=52.8%AL
118-x
x=118*100:250=47.2% O
1*0.25=250
M(AL2O3)=27*2+16*3=54+48102
102-54 AL
250-x
x=250*54:102=132.4кг АL
102-48
250-x
x=250*48:102=118кг O
250-100%
132.4-x
x=52.8%AL
250-100%
118-x
x=118*100:250=47.2% O