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Unformatted text preview: A scientific theory describes the underlying reasons for observations and laws. T or F The corrosion of iron is a physical change. T or F The law of conservation of mass states, " In a chemical reaction matter can be created and destroyed." T or F The correct scientific notation for the number 0.00050210 is A 5.0210 x 104 How many significant digits are in the number 2903? A 4 Perform the following calculation to the correct number of significant digits. (1.876 X 104 + 1.1176 X 102 ) 8.622 X 10 3 = A 1.318 X 106 How many inches are in 6.32 cm? (2.54 cm = 1 inch) A 2.49 in How many cm 3 are there in 1.25 ft 3 ? A 3.54 X 10 4 cm 3 What is the density of 96 mL of a liquid that has a mass of 90.5 g? A 9.4 X 101 g/ml What is the mass of a block of copper which has the dimensions 2.25 inches by 3.42 inches by 0.125 feet? V block = lwh, d copper = 8.96 g/cm 3 A 1.69 X 10 3 g How many nanometers are in 1 meter? A 1 X 10 9 nm How many liters are in 25.7 ft 3 ? A 7.28 X 10 2 l Carry out the following calculations to the correct number of significant figures: 1. (9443 + 45  9.9) X 8.1 X 10 6 = 7.7 X 10 10 2. (455 407859) + 1.00098 = 1.00210 3. 432 + 7.3  28.523 = 4.11 X 10 2 4. 0.009090 X 6007.2 = 5.461 X 10 1...
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This note was uploaded on 02/05/2011 for the course CHE M 100 taught by Professor Palmer during the Spring '09 term at CSU Northridge.
 Spring '09
 Palmer

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