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Chapter 2.2, 1.2, 2.3 Review Name ____________________________ Show your work & UNITS! Date _______________ Period _______ 1. How many significant digits are in the measurement 19.0550 g _______ 0.00310 g _______ 2. Perform the following calculations. You answers need to be in the correct number of significant digits. a) 165.86 g 4.0911 g 27.32 g + 140. g b) 2.542 cm x 3.88 m x 42 m 3. Write the following number in scientific notation: 602 000 000 000 000 000 000 000 4. Write 1.99 x 10-10 in standard form: __________________________________ 5. Convert 0.32 L to mL using dimensional analysis or the factor-label method. 6. What is the area of a room that is 3.56 m by 2.2 m: 7. A student measures the mass on an object as 123.5 g. Calculate the percent error in the measurement, if the accepted value for the mass is 126.00 grams. 8. Find the mass of an object with a density of 4.3 g/cm3 and a volume of 10 cm3. 9. Calculate the number of miles in a 21.1 km race (1/2 marathon) Given: 5280 ft = 1 mile and 2.54 cm = 1 inch. Test: 75 points (26 points multiple choice/ 49 points – 11 Problems) Read Objectives to find out what you need to know! Read notes, see PowerPoint, graphing. vocab metric conversions calculating volume/area scientific notation % error density factor-label lab skills measuring & calculating reading instruments precision accuracy Thought Question: density of gold = 19.3 g/mL density of sand = 2.5 g/mL volume of gold Idol = ~1600 mL given: 1 kg = 2.2 lbs Calculate the volume of sand Indiana Jones should have used: How much did the gold idol weigh in pounds?