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Let’s see what you know!! (or need to know)

Let’s see what you know!! (or need to know). Please use the color cards to answer the following questions. If not sure of the answer, do your BEST guess. Best of luck!!.

gladysmurphy
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Let’s see what you know!! (or need to know)

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  1. Let’s see what you know!!(or need to know) • Please use the color cards to answer the following questions. • If not sure of the answer, do your BEST guess. • Best of luck!!

  2. 1. A regularly-shaped block of wood has the following dimensions: 15.0 cm X 10.0 cm X 1.5 cm. The wood block’s mass is 234.06 grams. Will this block of wood sink or float in water at room temperature (25oC)? • Orange: sink • Green: float • Blue: you cannot tell from the information given

  3. What is the correct chemical formula for calcium phosphate? • Orange: CaPO4 • Green: Ca2(PO4)3 • Blue: Ca3(PO4)2 • Pink: Ca3(PO3)2 • Yellow: Ca2(PO3)3

  4. 3. Which of the following is an empirical formula? Pink: C2H6 Blue: C3H8 Orange: HC2H3O2 Green: Na2C2O4

  5. 4. Which of the following has the highest percent of iron? You may use your calculator!! • Orange: Fe2O3 • Green: Fe3O4 • Blue: FeO • Pink: FeCl2 • Yellow: FeCl3

  6. How many neutrons does an atom of the isotope uranium-236 have? • Orange: 93 • Green: 236 • Blue: 146 • Pink: 144 • Yellow: 92

  7. 6. When the following equation is balanced, what is the coefficient of CO2? C4H10(g) + O2 CO2(g) + H2O(g) Blue: 2 Pink: 4 Green: 6 Yellow: 8 Orange: 1

  8. 7. What is the correct chemical formula for perchloric acid? • Orange: HCl • Green: HClO • Blue: HClO2 • Pink: HClO3 • Yellow: HClO4

  9. 8. What is the oxidation state for the barium ion? • Orange: 0 • Green: +1 • Blue: +2 • Pink: -1 • Yellow: -2

  10. #9. The empirical formula for styrene is CH. What is the molecular formula for styrene? • The molar mass for styrene is 104.1 g/mol. • Pink: C2H4 • Green: C8H8 • Blue: C10H12 • Yellow: C6H6 • Orange: C4H4

  11. #10. What is the correct name for the following molecule? N2O3 • Pink: nitrogen oxide • Green: dinitrogen trioxide • Blue: nitrogen trioxide • Orange: dinitrogen tetraoxide

  12. #11. What is the correct name for Cr2(SO4)3? • Pink: chromium sulfite • Green chromium sulfate • Blue: chromium (II) sulfite • Orange: chromium (II) sulfate • Yellow: chromium (III) sulfate • No color: chromium (III) sulfite

  13. #12. HBrO2 (aq) is named: • Pink: bromous acid • Green: bromic acid • Blue: perbromic acid • Yellow: hypobromic acid • Orange: I am clueless and starting to cry a little

  14. #13. How many grams of calcium nitrate are there in 1.67 X 10-4 moles of calcium nitrate? • Pink: 1.02 X 10-6 g • Blue: 9.83 X 105 g • Orange: 1.71 X 10-2 g • Green: 2.74 X 10-2 g • Yellow: 6.11 X 105 g

  15. Free Response Questions • 14. How many oxygen atoms are there in 2.55 grams of sucrose, C12H22O11? MUST SHOW WORK TO GET CREDIT!!

  16. Question #15 • What is the percent composition of NaClO3?

  17. Question #16 • The mass spectrum of bromine (Br2) consists of three peaks with the following characteristics: What is the average mass? • Mass(amu) Relative size of peak • 157.84 .2534 • 159.84 .5000 • 161.84 .2466

  18. Question #17 • Write the balanced equation for the addition of solutions of sodium chromate and silver nitrate.

  19. Question #18 • The compound adrenaline contains 56.79% C, 6.56%H, 28.37%O, and 8.28% N by mass. What is the empirical formula for adrenaline?

  20. Question #19 • Adipic acid is an organic compound composed of 49.31%C, 43.79% O, and the rest hydrogen. If the molar mass of adipic acid is 146.1 g/mol, what are the empirical and molecular formulas for adipic acid?

  21. Question #20, hydrate of zinc nitrate

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