Question

calculate the percentage composition of C12 c14 is average atomic mass is 13.6 u​

Answer 1

Answer:

Let c12=X12

c14=Y14

X12 or c12

12X+14(100-X)/100=13.6

12X+1400-14X=1360

-2X=1360-1400

-2X=-40

X=40/2=20%

(anytime be 100% so 20% begot to find another one 100%-20%=80%)

Y14 or c14

14Y+12(100-Y)100=13.6

14Y+1200-12Y=1360

2Y=1360-1200

2Y=160

Y=160/2=80%

So,X12 or c12=20% and Y14 or c14=80%

20%+80%=100%