Question 12 (1 point) Saved Brass is an alloy of copper (8.92 g cm³) and zinc (7.14 g cm³). A 208.3 g piece of brass has a volume of 25.0 cm-3 What is the density of the piece of brass? O 167g4 7.67 g cm³ 8.00 g cm³ 8.33 g cm³ Question 13 (1 point) What is the mass percent of copper in the alloy? 72.4% 78.0% 66.9%

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