CHEM 115 Study Guide - Significant Figures, Kilogram, Cube Root
15 Sep 2014
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Units, measurement uncertainty, and significant figures - solutions. Give the names and their abbreviations for the si units of length, mass, time, and temperature. length = meter mass = kilogram time = second temperature = kelvin. The unit of volume is the liter (l). There is no base unit for volume, because volume can always be defined as the product of lengths, giving units of length cubed (e. g. , length x height x width). A student is asked to calculate the mass of calcium oxide produced by heating a certain amount of calcium carbonate. The student"s answer of 90. 32 is numerically correct, but the instructor marks it wrong. The diameter of a helium atom is about 30 pm. Write this length in meters, using standard scientific notation. Note that 1 pm = 10 12 m, so 30 pm = 30 x 10 12 m = 3 x 10 11 m. A cubic container is 2. 00 cm on each edge.
