Ch.1 - Chemical Tools: Experimentation & Measurement
Chapter 1, Problem 54
The normal body temperature of a goat is 39.9 °C, and that of an Australian spiny anteater is 22.2 °C. Express these tem-peratures in degrees Fahrenheit.
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Textbook Question
An experimental procedure call for 250 mg of calcium car-bonate. The balance in the laboratory measures mass in grams and reads to four decimal places. Which reading on the bal-ance corresponds to 250 mg?
(a) 0.0250
(b) 0.2500
(c) 0.0025
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A virus has a diameter of 5.2 * 10-8 m. What is the most appropriate prefix for reporting the diameter of the virus?
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Textbook Question
The estimated concentration of gold in the oceans is 1.0 * 10^-11 g/mL.
(b) Assuming that the volume of the oceans is 1.3 * 10^21 L, estimate the amount of dissolved gold in grams in the oceans.
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Textbook Question
Of the 90 or so naturally occurring elements, only four are liquid near room temperature: mercury (melting point = -38.87 °C), bromine (melting point = -7.2 °C), cesium (melting point = 28.40 °C), and gallium (melting point = 29.78 °C). Convert these melting points to degrees Fahrenheit.
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Textbook Question
Suppose that your oven is calibrated in degrees Fahrenheit but a recipe calls for you to bake at 175 °C. What oven set-ting should you use?
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Textbook Question
Tungsten, the element used to make filaments in light bulbs, has a melting point of 6192 °F. Convert this temperature to degrees Celsius and to kelvin.
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