(a) What is the composition, in weight percent, of an alloy that consists of 10

Question

(a) What is the composition, in weight percent, of an alloy that consists of 10 at% Zinc, 8 at% aluminum and 82 at% copper? (b) What is the composition, in atom percent, of an alloy containing 98 g tin and 65 g lead? (a) What is the composition, in weight percent, of an alloy that consists of 10 at% Zinc, 8 at% aluminum and 82 at% copper? (b) What is the composition, in atom percent, of an alloy containing 98 g tin and 65 g lead? (a) What is the composition, in weight percent, of an alloy that consists of 10 at% Zinc, 8 at% aluminum and 82 at% copper? (b) What is the composition, in atom percent, of an alloy containing 98 g tin and 65 g lead?

Explanation / Answer

Wt percent = Wt / Mol wt.

Zinc = 10 / 65.39 = 0.1529

Aluminium = 8 / 26.98 = 0.2965

Copper = 82 / 58.93 = 1.3914

Atomic percent = Wt of compounf / total wt of compound x 100

98 gm of tin = 98 / 163 x 100 = 60.12 %

65 gm of lead = 65 / 163 x 100 = 39.87 %

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