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Chapter 1: Problem 9

Indicate whether each sample of matter listed is a substance or a mixture; if it is a mixture, indicate whether it is homogeneous or heterogeneous. (a) clean fresh air (b) a silver-plated spoon (c) garlic salt (d) ice

Short Answer

Expert verified
(a) clean fresh air is a homogeneous mixture; (b) a silver-plated spoon is a heterogeneous mixture; (c) garlic salt is a homogeneous mixture; (d) ice is a substance.

Step by step solution

01

Analyzing 'clean fresh air'

Clean fresh air is made up of many components like nitrogen, oxygen, argon, etc. These are not chemically combined and the composition is uniform, which characterizes it as a homogeneous mixture.
02

Analyzing 'a silver-plated spoon'

A silver-plated spoon is made of a layer of silver on top of another material. This suggests two different materials are involved. Therefore, it is a heterogeneous mixture as it doesn't have the same composition throughout.
03

Analyzing 'garlic salt'

Garlic salt is a mixture of garlic and salt. These substances are not chemically combined but the mixture is uniform, characterizing it as a homogeneous mixture.
04

Analyzing 'ice'

Ice is simply frozen water, meaning it has a uniform and definite composition. Therefore, it qualifies as a substance.

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Most popular questions from this chapter

A family/consumer science class is given an assignment in candy-making that requires a sugar mixture to be brought to a "soft-ball" stage \(\left(234-240^{\circ} \mathrm{F}\right)\). A student borrows a thermometer having a range from \(-10^{\circ} \mathrm{C}\) to \(110^{\circ} \mathrm{C}\) from the chemistry laboratory to do this assignment. Will this thermometer serve the purpose? Explain.

To determine the approximate mass of a small spherical shot of copper, the following experiment is performed. When 125 pieces of the shot are counted out and added to \(8.4 \mathrm{mL}\) of water in a graduated cylinder, the total volume becomes \(8.9 \mathrm{mL}\). The density of copper is \(8.92 \mathrm{g} / \mathrm{cm}^{3} .\) Determine the approximate mass of a single piece of shot, assuming that all of the pieces are of the same dimensions.

Explain the important distinctions between each pair of terms: (a) mass and weight; (b) intensive and extensive properties; (c) substance and mixture; (d) systematic and random errors; (e) hypothesis and theory.

In an engineering reference book, you find that the density of iron is \(0.284 \mathrm{lb} / \mathrm{in.}^{3} .\) What is the density in \(\mathrm{g} / \mathrm{cm}^{3} ?\)

The reported value for the volume of a rectangular piece of cardboard with the dimensions \(36 \mathrm{cm} \times\) \(20.2 \mathrm{cm} \times 9 \mathrm{mm}\) should be \((\mathrm{a}) \quad 6.5 \times 10^{3} \mathrm{cm}^{3};\) (b) \(7 \times 10^{2} \mathrm{cm}^{3} ;\) (c) \(655 \mathrm{cm}^{3} ;\) (d) \(6.5 \times 10^{2} \mathrm{cm}^{3}\).
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