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Unformatted text preview: dilute acids Sulfides Group 1 metals, ammonium Hydroxides Group 1 metals, ammonium, dilute acids, Ca2+, Ba2+, and Sr2+ Chromates Group 1 metals, ammonium, dilute acids, Ca2+,Mg2+ 5. What is the difference between weight and mass? What are the SI units for each? 6. Perform the following conversions involving the liter: 1L=____dm3=____cm3=____m3 7. Calculate the mass ratio of the following properties for 1.0 kg of air versus 1.0kg of iron at 25oC. A. Mass b. volume c. density 8. Write the number 1200 three ways: to 2, 3, and 4 significant figures 9. A container has a volume of 1.05 x 103 cm3. When filled with gas, the mass of the container + gas is 837.6 g. The mass of the container alone is 836.2 g. To the correct number of significant figures, what is the density of the gas? 10. Perform the following conversion: What is the cost of gasoline in US$ per gallon for fuel in London that costs £0.75 per liter? (1£= 2.03$) 11. Describe how you would separate and recover into four separate containers the following four components of a mixture: liquid water (H2O(l)) + iron filings (Fe(s)) + sodium chloride dissolved in water (NaCl(aq)) + beach sand grains (SiO2(s)). 12. Classify each of the following as to pure substances or mixtures. If an item is a mixture, specify if it is heterogeneous or homogeneous. (a) concrete (b) seawater (c) magnesium (d) gasoline (e) air (f) tomato juice (g) iodine crystals (h) a nickel 13. How would you separate a mixture of granulated sugar and beach sand of comparable grain size? 14. Name the following elements H, Mg, Pb, Si, F, Sn, Cu, Ca, Ba, Cf, Mo, Se, Tl, V, Au, Zr 15. A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white solid substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned with excess oxygen. What can you say about whether solids A and B and the gas C are elements or compounds? 16. In the process of attempting to characterize a substance, a chemist makes the following observation: The substance is a silvery white, lustrous metal. It burns in air, producing an intense white light. It reacts with chlorine to give a brittle white solid. The substance can be pounded into thin sheets or down into wires. It is a good conductor of electricity. Which of these characteristics are physical and which are chemical properties? 17. Use appropriate metric prefixes to write the following measurements without use of exponents. (a) 6.5 x 10‐9cm (b) 3.35 x 10‐4 mL (c) 2.5 x 10‐3 mol (d) 4.23 x 10‐12m3 (e) 12.5 x 10‐8 s (f) 3.5 x 103L (g) 6.54 x 109 fs 18. Convert (a) 2.52 x 103 kg to g (b) 0.0023 mm to nm (c) 6.25 x 10‐4 s to ms 19. Calculate the mass of 1.00 ft3 of gold metal. 20. Calculate the mass of 12.0 cm sphere of lead metal 21. A 200.0mg piece of gold can be hammered into a sheet that is 2.4 ft. by 10 ft. (a) What is the thickness of the sheet in m? (b) Quote the answer using the SI prefix so that there is no exponent needed. 22. Convert the following temperatures (a) 1000K to...
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This document was uploaded on 09/19/2013.
- Fall '13
- AP Chemistry