Chapter 1: Problem 51
By using estimation techniques, arrange these items in order from shortest to longest: a \(57-\mathrm{cm}\) length of string, a 14 -in. long shoe, and a \(1.1-\mathrm{m}\) length of pipe.
Chapter 1: Problem 51
By using estimation techniques, arrange these items in order from shortest to longest: a \(57-\mathrm{cm}\) length of string, a 14 -in. long shoe, and a \(1.1-\mathrm{m}\) length of pipe.
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Get started for freeWhat type of quantity (for example, length, volume, density) do the following units indicate: (a) \(\mathrm{mL},(\mathrm{b}) \mathrm{cm}^{2}\), (c) \(\mathrm{mm}^{3}\), (d) \(\mathrm{mg} / \mathrm{L},(\mathrm{e}) \mathrm{ps},(\mathrm{f}) \mathrm{nm},(\mathrm{g}) \mathrm{K} ?\)
Suggest a method of separating each of the following mixtures into two components: (a) sugar and sand, (b) iron and sulfur.
Indicate the number of significant figures in each of the following measured quantities: (a) \(3.774 \mathrm{~km}\), (b) \(205 \mathrm{~m}^{2}\), (c) \(1.700 \mathrm{~cm}\), (d) \(350.00 \mathrm{~K}\), (e) \(307.080 \mathrm{~g}\).
The liquid substances mercury (density \(=13.5 \mathrm{~g} / \mathrm{mL}\) ), water \((1.00 \mathrm{~g} / \mathrm{mL})\), and cyclohexane \((0.778 \mathrm{~g} / \mathrm{mL})\) do not form a solution when mixed, but separate in distinct layers. Sketch how the liquids would position themselves in a test tube.
In 1807 the English chemist Humphry Davy passed an electric current through molten potassium hydroxide and isolated a bright, shiny reactive substance. He claimed the discovery of a new element, which he named potassium. In those days, before the advent of modern instruments, what was the basis on which one could claim that a substance was an element?
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