| Wood's metal contains 50.0% bismuth, 25.0% lead, 12.5% tin and 12.5% cadmium by mass. What is the mole fraction of tin? |
| (Atomic mass: Bi=209, Pb=207, Sn= 199, Cd= 112) |
A) 0.202
B) 0.158
C) 0.176
D) 0.221
Correct Answer: C
Solution :
[b] \[{{X}_{sn}}=\frac{12.5/119}{\frac{50}{209}+\frac{25}{207}+\frac{12.5}{119}+\frac{12.5}{112}}=0.176\]
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