An alloy contains 64 g of pure gold and 39 g of pure zinc. What is the percentage of zinc in the alloy

37.9 % of the alloy is zinc

Explanation:

Step 1: Date given

Mass of pure gold = 64.0 grams

Mass of pure zinc = 39.0 grams

Step 2: Calculate Total mass

Total mass = mass pure gold + mass pure zinc

Total mass = 64.0 grams + 39.0 grams

Total mass = 103 grams

Step 3: Calculate % zinc

% zinc = (mass zinc / total mass) * 100%

% zinc = (39.0 grams / 103 grams) * 100%

% zinc = 37.9 %

37.9 % of the alloy is zinc