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apch06_sumreview_ans10

# apch06_sumreview_ans10 - South Pasadena AP Chemistry Name...

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South Pasadena AP Chemistry Name _______________________ Period ___ Summer Review Station 1 ( C h 1 ) - M E A S U R E M E N T S Write in the number of significant figures for each of the following measurements: _ 3 _ 3.00 mL _ 3 _ 0.00 290 g _ 4 _ 50.00 m _ 2 _ 0.0 70 kg _ 1 _ 4 00 L Combine the masses 0.0562 kg, 124.213 g and 1635 mg. The answer should be reported as: _ 182.0 _ g 56. 2 g + 124.21 3 g + 1.63 5 g = 182. 0 4 8 round number off to largest digit with uncertainty… tenths You measure a 5.75 mL sample of mercury with a mass of 77.05 g. The measured density is __ 13.4 g/mL __ density = mass/volume = 77.05 g / 5.75 mL = 13.4 g/mL Mercury’s accepted density is 13.53 g·mL -1 . The % error in your measurement is: ___ 0.96 % ____ 100 x (13.53 13.4) / 13.53 = 0.96 % Is this person accurate? _ N _ Is the person precise? _ Y _ not on the bull’s eye closely grouped Summer Review Station 2 ( C h 1 ) - M A T T E R This molecule contains _ 3 (C, H & O) _ elements and _ 12 _ atoms. The molecular formula for this substance is: ___ C 3 H 6 O 3 ____ You may need to see the color version of this molecule to be certain. Calculate the number of seconds in 5.25 years using unit analysis: (1 year = 365.25 days) 5.25 years x year 1 days 365.25 x day 1 hours 24 x hour 1 sec 3600 = 165677400 sec = 166,000,000 sec = 1.66 x 10 8 sec A calculator displays the answer to a problem as 53.29841 Report this answer to: ____ 53.298 ____ 5 significant figures ____ 53.3 ______ 3 significant figures ____ 50 ________ 1 significant figure

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Summer Review Station 3 ( C h 3 ) - M E A S U R I N G C H E M I C A L S
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