1-3 review - A scientific theory describes the underlying...

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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 How many significant digits are in the number 2903? Perform the following calculation to the correct number of significant digits. (1.876 X 10-4 + 1.1176 X 10-2 ) 8.622 X 10 3 = How many inches are in 6.32 cm? (2.54 cm = 1 inch) How many cm 3 are there in 1.25 ft 3 ? What is the density of 96 mL of a liquid that has a mass of 90.5 g? 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 How many nanometers are in 1 meter? How many liters are in 25.7 ft 3 ? Carry out the following calculations to the correct number of significant figures: 1. (9443 + 45 - 9.9) X 8.1 X 10 6 2. (455 407859) + 1.00098 3. 432 + 7.3 - 28.523 4. 0.009090 X 6007.2...
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1-3 review - A scientific theory describes the underlying...

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