Free Printable Honors Chemistry Spring Final Review

Worksheets

Honors Chemistry Spring Final Review

Total questions: 51

Worksheet time: 4hrs 11mins

Name

Class

Date

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

3mol Mg / 2 mol Fe

2 mol Mg/ 3 mol Fe

1 mol Fe/ 2 mol Fe

3 mol MgO / 2 mol Fe

Cl₂ + 2KBr → Br₂ + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

749 g

223 g

479 g

814 g

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

13.7 mol

2.75 mol

6.11 mol

6.85 mol

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

13.8 g O₂

3.86 mol of O₂

125.2 g O₂

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

0.85 g

290 g

450 g

870 g

When does a chemical reaction stop?

When the lab is finished

When the excess reactant is used up

When the limiting reactant is used up

Chemical reactions never stop

2CO + O₂−-> 2CO₂
How many liters of carbon dioxide are produced from 10L of carbon monoxide?

30.5g of silver nitrate react with excess sodium chloride. What is the theoretical yield of precipitate from this reaction?

12.9g

36.1g

25.7g

51.4g

30.5g of silver nitrate react with excess sodium chloride. If 10.5g of precipitate are collected from this reaction, what is the percent yield of this reaction?

40.9%

20.4%

81.0%

25.7%

10.

How many particles would be in 8.4 moles of Octane (C₈H₁₈)?

5.77 x 10²³

5.04 x 10²⁴

5.77 x 10²⁶

5.04 x 10²³

11.

2Al + 6HCl --> 2AlCl₃ + 3H₂

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

8.8

0.99

1.0

12.

Mg₃N₂ + 3H₂O ––> 3 MgO + 2NH₃

If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?

4.9 L NH₃

4.96 L NH₃

0.261 L NH₃

0.26 L NH₃

13.

1Mg + 2H₂O --> Mg(OH)₂ + H₂

What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?

62.0 L

0.12 L

2.77 L

1.15 L

14.

4NH₃+6NO --> 5N₂ + 6H₂O

How many liters of NH₃ at 32.6 ^oC and 4.25 kPa are needed to react completely with 30.0L of NO at STP?

5.27 L

534 L

5.2 L

533.6 L

15.

When solving for gas stoichiometry problems which of the following is correctly matched?

STP conditions; molar mass

NON STP conditions; PV=nRT

STP conditions; PV=nRT

NON STP conditions; 22.4 moles

16.

2Cu₂S + 3O₂ → 2Cu₂O + 2SO₂

This reaction uses 18.2 g of copper (I) sulfide. What volume of sulfur dioxide gas would be collected at 237°C and 10.7 atm?

0.446 L

57 L

0.207 L

0.21 L

17.

A sample of nitrogen gas is found to have a pressure of 4 atm, a temperature of 500 K, and a volume of 6 L. Calculate the number of particles (in mol) in the sample using the appropriate equation.

0.41 mol

0.58 mol

0.0039 mol

0.045 mol

18.

The pressure of a gas is decreased from 5 atm to 3.5 atm which temperature and number of particles is held constant. We would expect a(n) _____ in the volume of the gas as pressure decreases.

Increase

Decrease

No change

Not enough information given

19.

The pressure of a gas is decreased from 5 atm to 3.5 atm which temperature and number of particles is held constant. What law/equation could be used to calculate the change in volume?

Boyle's

Charles'

Ideal Gas

Not enough information given

20.

What is the percent by mass of Cu in CuBr₂?

50%

71.6%

28.4%

44.3%

21.

What is the percent by mass of Br in CuBr₂?

50%

71.6%

28.4%

44.3%

22.

How much heat does an aluminum block absorb if 10.00 grams ae heated from 25.0^oC to 50.0^oC? the specific heat of aluminum is .900J/g^oC

450

-450

225

-225

23.

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

12.82 °C

24.12°C

351 °C

24.

The decomposition of aluminum chlorate into its products requires 43.8 kJ of heat. Calculate the amount of heat required to decompose 125.0g of aluminum chlorate.

15.5kJ

20.0kJ

4.25kJ

9.87kJ

25.

Calculate the empirical formula for a compound composed of 40.79g carbon, 6.844g of hydrogen, 54.329g of oxygen, and 13.59g of nitrogen.

C₇H₁₄O₇N₂

CHON

C₂₁H₄₂O₂₁N₆

C₆H₁₂O₆N

26.

A sample of a hydrate of sodium carbonate has a mass of 10.13g. After heating, it has a mas of 7.57g. Find the formula for of this hydrate.

Na₂CO₃ $\circ$ H₂O

Na₂CO₃ $\circ$ 2H₂O

Na₂CO₃ $\circ$ 3H₂O

Na₂CO₃ $\circ$ 4H₂O

27.

Calculate the percent yield when 125.0mL of a 0.20M solution of zinc nitrate reacts with 250.0mL of a 0.45M solution of sodium phosphate. The actual yield is 2.85g of precipitate.

27%

55%

89%

13%

28.

What element is being Oxidized?

29.

Is calcium oxidized or reduced in the following reaction?
2 CaO--> 2 Ca + O₂

Oxidized

Reduced

30.

Which of the following half reactions correctly represents a reduction half reaction?

Fe →Fe²⁺+ 2e^-

Pb⁴⁺ + 2e^- →Pb²⁺

2O^-2→O₂ + 4e^-

Fe + 3e^- →Fe³⁺

31.

What is the oxidation number of chlorine in HClO?

-1

32.

The sum of the oxidation numbers in Na₂CO₃ is equivalent to

-2

-1

33.

Which is the correct net ionic equation for the reaction of AgNO₃ and CaCl₂?

Ca²⁺(aq) + 2Cl^- (aq) → CaCl(s)

Ag⁺(aq) + Cl^- (aq) → AgCl(s)

Ag + Cl → AgCl

Ag⁺+ Ca²⁺ →Ag₂Ca (s)

34.

What are the spectator ions in the reaction of sodium chloride with silver nitrate?

silver and nitrate

sodium and chloride

sodium and nitrate

silver and chloride

35.

In order to dilute a solution, you need to

add more of the solid

add more water

add organic solvent

add another solute

36.

What is a solute?

The substance that does the dissolving in a solution.

The substance that is dissolved into the solution.

The mixing of different substances.

The process in which neutral molecules lose or gain electrons

37.

According to which theory is a base a substance which produces OH- ions in water?

Arrhenius

Bronsted-Lowry

Lewis

38.

According to Bronsted-Lowry acid base theory, an acid is a.....

Proton donor

Proton acceptor

Produces H+ when added to water

Made of H+

39.

Tipo de sustancia que al disociarse produce concentración de iones H+

Sales

Agua

Hiróxidos

Acidos

40.

If a solution has a [H⁺] of 9.3x10^-11, what is the pH?

10.0

4.0

3.5

8.2

41.

If a solution has a [OH^-] of 2.3x10^-4, it must be a(n)...

Acid

Base

Neutral

42.

If the pH of a solution is 5.6 the pOH is

6.5

12.4

8.4

5.6

43.

A pH and a pOH will add up to:

1.0 x 10^-14

44.

What is the equation for calculating pH?

pH = [H⁺]

pH = log [H⁺]

pH = -log[OH^-]

pH = -log [H⁺]

45.

The pH of a solution is 8.43. What is the hydronium ion H₃O⁺ concentration?

3.7 x 10^-9M

2.7 x 10^-6 M

1.0 x 10^-8.43 M

1.0 x 10^-14

46.

The pH of a solution is 8.43. What is the hydroxide ion OH^- concentration?

3.7 x 10^-9 M

2.7 x 10^-6 M

antilog (-pH)

1.0 x 10^-14/-pH

47.

If I initially have 4.0 L of a gas at a pressure of 1.1 atm, what will the volume be if I increase the pressure to 3.4 atm?

1.29 L

12.36 L

1.29 atm

12.36 atm

48.

A sample of nitrogen occupies a volume of 250 mL at 25^oC. What volume will it occupy at 95^oC?

308.70 mL

456.1 mL

308.70^oC

456.1^oC

49.

Oxygen gas is at a temperature of 40^oC when it occupies a volume of 2.3 liters. To what temperature should it be raised to occupy a volume of 6.5 liters?

611.84^oC

611.84 K

880.33 K

880.33^oC

50.

A gas is heated from 263K to 298K. The volume is increased from 24.0L to 35.0L. If the original pressure was 1.00 atm, what is the new pressure?

0.78 atm

1.65 atm

1.28 atm

0.61 atm

51.

A weather balloon has a volume of 105L at 0.97 atm when the temperature is 318K. What is the volume at 293K and 1.05 atm?

89.4 L

0.32 L

93.8 L

3.13 L

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Honors Chemistry Spring Final Review

Total questions: 51

Worksheet time: 4hrs 11mins

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