The document provides a third quarter assessment review with multiple choice and short answer questions covering topics like naming compounds, writing chemical formulas, performing stoichiometry calculations using moles and the ideal gas law, and identifying variables in a scientific experiment. It includes the questions, spaces to write answers, and the completed answer key.

1. Do now:
1. Obtain “3rd Quarter Assessment Review” from
black desk
2. Take out “Third Quarter Assessment PPT” from
blog
3. Sit with a partner and write the answers to the
assessment review. Please explain your
reasoning for selecting that answer.
4. Raise your hand if you have any questions.

2. 3rd Quarter Assessment Review

3. 3rd Quarter Assessment Review

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10. 3rd Quarter Assessment Review
1. Classify as ionic or covalent & give the name
a.SO3 b. Cu2S c. BF3 d. I2
e. Pb3(PO3)2 f. FeSO4
2. Give the formula for the following:
a. vanadium(II) phosphide
b. dinitrogen heptoxide
c. gold(I) phosphate
d. aluminum carbonate
e. disulfur trichloride
f. pentaphosphorus hexafluoride
g. ammonium cyanide

11. 3rd Quarter Assessment Review
• Remember this roadmap:
Atoms moles mass (g)
1. How many molecules are there in 52 g of CO?
2. What is the mass of 3.01 x 1023 formula units
of Fe2O3?
3. How many moles of Cl atoms are in 5.33 mol
of CuCl2?
4. How many O atoms are in 3.15 mol of SnO2?
5. How many H atoms are in 17.5 g (NH4)2C2O4?

12. 3rd Quarter Assessment Review
• Ideal Gas Law
1. Determine the celcius temperature of 2.49
moles of gas contained in a 1.mm L vessel at a
pressure of 143kPa.
2. What is the pressure in atmospheres of a
0.1085 mole sample of he gas at a
temprerature of 20.0 C if its volume is 0.505 L?

13. 3rd Quarter Assessment Review
Identify the ALL variables, the control and constants.
• Suppose a farmer grows tomatoes in a small garden.
He notices that his plants, compared to his neighbor’s,
are not producing a lot of tomatoes and don’t look
healthy. Each spring he plants 20 seedlings, and by
autumn he usually harvests only 50 to 60 tomatoes.
This spring, following his neighbor’s advice, he mixed 5
kilograms of fertilizer into the soil. Instead of the usual
crop, his 20 plants produced more than 100 tomatoes-
what a great yield! He now believes that the fertilizer
increased his tomato crop yield. But did it really?

14. 3rd Quarter Assessment Review
ANSWERS
Ans to Pics:
20. C
36. I
4. C
5. I
7. I
8. D
24. B
95. B
22. C

15. 3rd QSBA Review Answers to Naming and
Formulas
1. a. C, Sulfur trioxide 2. a. V3P2
b. I, Copper I sulfide b. N2O7
c. C, Boron trifluoride c. Au3PO4
d. C, elemental Iodine d. Al2(CO3) 3
e. I, Lead II Phosphite e. S2Cl3
f. I, Iron II Sulfate f. P5F6
g. NH4CN

16. 3rd QSBA Review Answers to Moles &
Ideal Gas Law
• Ans to Moles: • Ans to IDEAL GAS LAW:
1. 1.1 x 1024 molecules 1. 6.90 K
2. 79.9 g Fe2O3 2. 5.14 atm
10.7 mol of Cl atoms
3. Pg 940
3. 3.79 x 1024 O atoms
4. 6.79 x 1023 H atoms

17. 3rd QSBA Review Answers to Sci
Method and Variables
• Ind variable: Fertilizer + soil
• Dependent Variable: # of tomatoes harvested
• Control: reg soil no fert
• Constants: # of seedlings (20), amt of
soil, place where planted, time of
planting, amt of water