week2 - CHEM 1P Discussion Problem Set #2 (week of 10/4 -...

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Unformatted text preview: CHEM 1P Discussion Problem Set #2 (week of 10/4 - 10/08) 1) Convert each number into scientific notation. a) 0.0144! b) 144!! c) 36.32! d) 0.0000098 2) Specify the number of significant figures in each measured value. a) 30.1C! b) 0.00730 m!! c) 7.30 x 103m d) 44.50 mL 3) Each of the numbers below is measured. Solve the calculations and give the answer with the correct number of significant figures. a) 0.12 x 1.77 b) 690.4 12 c) 5.444 - 0.44 d) 16.5 + 0.114 + 3.55 4) Convert the number 62.3 x 102 into a decimal number with the correct number of significant digits. 5) How many significant figures does each number have? Assume that each is a measured value. a) 10000000.5! b) 887.60! c) 0.668! d) 45! e) 0.00045 6) A pure solid has a density of 4.50800 g/mL. What is the mass (g) of 195.45 mL of the pure solid expressed to the correct number of significant figures? CHEM 1P Discussion Problem Set #2 (week of 10/4 - 10/08) 7) A sample of calcium carbonate weighing 25.0578 grams and water weighing 143.4 grams were added to a erlenmeyer flask that weighed 67.705 grams. Calculate the total mass (g) to the correct number of decimal places. Calculate the answer then round if necessary. 8) Determine to the correct number of significant figures the mass (g) of a mineral that is 69.7% by mass copper and contains 26.7 g of copper. 9) Convert the following. a) b) c) d) 92 g into grams 27.2 ng into milligrams 0.33 kg into milligrams 7.27 mg into micrograms 10) Convert the decimal number 811.74 into standard scientific notation with the correct number of significant digits. ...
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week2 - CHEM 1P Discussion Problem Set #2 (week of 10/4 -...

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