A1=63
A2=65
X1=x%
X2=(100-x)%
m at. = 63,45u
Korzystam ze wzoru na średnią masę atomową
m at. = A1*X1% + A2*X2%/100%
63,45 = 63*x% + 65(100-x)%/100%
6345 = 63*x% + 6500 - 65*x%
2x = 155
x = 77,5
X1(63Cu) = 77,5%
X2(65Cu) = 22,5%
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A1=63
A2=65
X1=x%
X2=(100-x)%
m at. = 63,45u
Korzystam ze wzoru na średnią masę atomową
m at. = A1*X1% + A2*X2%/100%
63,45 = 63*x% + 65(100-x)%/100%
6345 = 63*x% + 6500 - 65*x%
2x = 155
x = 77,5
X1(63Cu) = 77,5%
X2(65Cu) = 22,5%