Ch.1 - Chemical Tools: Experimentation & Measurement
Chapter 1, Problem 50
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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Related Practice
Textbook Question
Express the following measurements in scientific notation. (a) 453.32 mg
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Textbook Question
Express the following measurements in scientific notation. (b) 0.000 042 1 mL
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Textbook Question
Convert the following measurements from scientific notation to standard notation.
(a) 3.221 * 10-3 mm
(b) 8.940 * 105 m
(c) 1.350 82 * 10-12 m3
(d) 6.4100 * 102 km
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(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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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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