Answer to Question #347384 in General Chemistry for eian

Question

An alloy is prepared by mixing 60g copper and 70g zinc. Find the percentage by mass of copper and zinc.

Answer 1

Solution:

Mass of alloy = Mass of copper + Mass of zinc = 60 g + 70 g = 130 g

Percentage by mass = (Mass of component / Mass of alloy) × 100%

Therefore,

Percentage by mass of copper = (60 g / 130 g) × 100% = 46.15%

Percentage by mass of zinc = (70 g / 130 g) × 100% = 53.85%

Answer:

The percentage by mass of copper is 46.15%

The percentage by mass of zinc is 53.85 %