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CHEMISTRY SOL 4 REVIEW

UNIT 9 Molar Conversions

- Calculate the following
- 0.35 mol F _________ atoms F
- 3.25 moles CO2 ________molecules
- 2.6 moles Cu _______ g Cu
- 4.23 g NaCl ________ moles NaCl

2.11 x 1023

1.96 x 1024

165.23

0.07

2009 SOL question

- The number of molecules in 48.0 g of oxygen gas

(O2) is - A 6.02 x 1023
- B 9.03 x 1023
- C 1.20 x 1024
- D 1.81 x 1024

UNIT 9 Molar Conversions

- At STP, 1 mole of any gas occupies ______ Liters
- 22.4
- What is the volume of 7.3 g of CO2 at STP?
- 3.72 L
- Find the density of O2 gas at STP.
- 1.43 g/L

2009 SOL question

- What is the volume occupied by 51 g of NH3 gas at

STP? - F 0.439 L
- G 22.8 L
- H 67.2 L
- J 91.9 L

UNIT 10 - Stoichiometry

- What is the mole ratio of AlBr in the following

equation? - 2Al (s) 3Br2 (l) ? 2AlBr3 (s)
- 23
- How many moles of O2 are produced when 2.35 moles

of CO2 break down? - CO2 ? C O2
- 2.35 moles

UNIT 10 - Stoichiometry

- LiOH HBr ? LiBr H2O
- If you start with 10 grams of lithium hydroxide,

how many grams of lithium bromide will be

produced? - 36.25 g
- 2SO2 O2 ? 2SO3
- What is the limiting reactant if you have 0.25

moles of each reactant? - SO2

2009 SOL question

- If a student starts with 21.7 g of NH3, how many

grams of hydrogen (H2) gas will be produced by

the reaction? - 2NH3 ? N2 3H2
- 3.85 g

UNIT 10 - Stoichiometry

- LiOH KCl ? LiCl KOH
- I began this reaction with 20 grams of LiOH and

produced 31 g of LiCl. What is my percent yield? - Theoretical 35.4 g
- Percent Yield 87.6

UNIT 11 Gas Laws

- Increasing the number of particles will

____________ the pressure of a gas. - Increase
- Increasing volume will ________ the pressure of a

gas. - Decrease
- Decreasing the temperature will _______________

the pressure of a gas - Decrease

UNIT 11 Gas Laws

- Draw a graph to show the relationship of volume

and pressure.

UNIT 11 Gas Laws

- Whats the partial pressure of oxygen in a

balloon filled with O2 and N2 if the total

pressure in the balloon is 810 mmHg and the

partial pressure of N2 is 610 mmHg? - 200 mmHg

UNIT 11 Gas Laws

- When using any of the gas laws, what unit must

you use for TEMPERATURE? - Kelvin
- If we took 2.00 liters of a gas at 1.00 atm and

compressed it to a pressure of 6.00 x 104 atm,

what would the new volume of that gas be? - P1V1 P2V2
- 3.33 x 10-5 L

UNIT 11 Gas Laws

- If a balloon initially has a volume of 0.4 liters

and a temperature of 20oC, what will the volume

be after it is heated to a temperature of 250oC? - V1/T1 V2/T2
- 0.71 L

UNIT 11 Gas Laws

- If I have an unknown quantity of gas at a

pressure of 1.2 atm, a volume of 31 liters, and a

temperature of 87oC, how many moles of gas do I

have? - PV nRT R 0.0821
- n 1.26 moles

UNIT 12 - Solutions

- What units do we use when measuring molarity (M)?
- moles/L
- How many moles of HCl are needed to make 675 mL

of a 2.0 M solution? - 1.35 moles

UNIT 12 - Solutions

- In terms of solubility, polar substances tend to

dissolve in _______________ substances. - Other polar
- Why wont oil and water stay mixed?
- Oil is nonpolar, water is polar
- List two ways you can speed the dissolving

process. - Stirring, Heating

UNIT 12 - Solutions

- Which salt is most soluble at 10oC?
- KI
- How many grams of KCl can be dissolved in 200 g

of water at 80oC? - 100 g KCl

UNIT 12 - Solutions

- Adding salt to ice or water alters it by

_____________ the freezing point. - Lowering/depressing
- 2.0 L of a 0.88 M solution is diluted to 3.8 L.

What is the new molarity? - M1V1 M2V2
- 0.46 M

UNIT 13 Everything Else

- How is molar heat capacity different from

specific heat capacity? - Molar heat capacity talks about raising the temp

of 1 mole, specific heat is 1 gram - How many joules of heat are given off when 120

grams of water are cooled from 25oC to 10oC? The

heat capacity of ice is 2.09 J/goC. - Q mc T
- Q 3762 J

UNIT 13 Everything Else

- What kind of chemical would you use to neutralize

an acid spill in a lab? - Base (Ammonia, Sodium bicarbonate)
- What is the pH of a 0.1 M solution of a strong

acid? - 1
- What is the pH of a 0.36 M solution of the strong

base NaOH? - 13.55

UNIT 13 Everything Else

- What does pH measure?
- Concentration of hydrogen ions
- If a substance has a pH of 3, what is its pOH?
- 11