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. Blue: you cannot tell from the information given
1. A regularly-shaped block of wood has the following dimensions: cm X 10.0 cm X 1.5 cm. The wood block’s mass is 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. Orange: Fe2O3 Green: Fe3O4 Blue: FeO Pink: FeCl2 Yellow: FeCl3
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) + O 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
#9. The empirical formula for styrene is CH. What is the molecular formula for styrene?
The molar mass for styrene is 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
#13. How many grams of calcium nitrate are there in 1.67 X 10-4 moles of calcium nitrate?
Pink: X 10-6 g
Blue: X 105 g
Orange: X 10-2 g
Green: X 10-2 g
Yellow: 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

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 g/mol, what are the empirical and molecular formulas for adipic acid?

21. Question #20, hydrate of zinc nitrate
Test Tube only
17.09 g
Test Tube + hydrate
19.88 g
Hydrate only g
TT + anhydrous salt
18.87 g
Mass of anhydrous salt
Mass of H2O removed
Determine the empirical
Formula from this info