Some Basic Concepts Of Chemistry Question 82
Question: 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)
Options:
A) 0.202
B) 0.158
C) 0.176
D) 0.221
Show Answer
Answer:
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 $
