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Lecture 3 Problems

# Lecture 3 Problems - 1.108 Brass is a copper-zinc alloy...

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Problems 1.71, 1.103, 1.108 Rounding Policy in class: If it is 5 or higher then we round up for CHEM101.

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1.71(a) (a) (3.41 – 0.23) x 0.205 5.233
1.71(b) (b) (5.556 x 2.3) 4.223 – 0.08

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1.103 Vinaigrette salad dressing consists mainly of oil and vinegar. The density of olive oil is 0.918 g/cm3, the density of vinegar is 1.006 g/cm3 and the two do not mix. If a certain mixture of olive oil and vinegar has a total mass of 397.8 g and a total volume of 422.8 cm3, what is the total volume of oil and what is the total volume of vinegar in the mixture?

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Unformatted text preview: 1.108 Brass is a copper-zinc alloy. What is the mass in grams of a brass cylinder having a length of 1.62 in and a diameter of 0.514 in. if the composition of the brass is 67.0% copper and 33.0% zinc by mass? The density of copper is 8.92 g/cm3 and the density of zinc is 7.14 g/cm3. Assume the density of the brass varies linearly with composition. 1 in = 2.54 cm Volume of a cylinder = r2h...
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Lecture 3 Problems - 1.108 Brass is a copper-zinc alloy...

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