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Honors Spring Final 2021

Last updated over 4 years ago
30 questions
4

A sample of argon has a volume of 5 L and a pressure of 0.92 atm. If the final temperature is 200 °C, the final volume is 5.7 L, and the final pressure is 800 mmHg, what was the inital temperature of the argon?

4

State whether the pressure of a gas in a sealed container increases or decreases with each of the following changes:
a) The volume changes from 250 mL to 500 mL.
b) The temperature changes from 20 °C to –80 °C.
c) The moles of gas change from 1.00 mol to 1.50 mol.

2

The pressure is recorded as 738 mmHg. Convert this measurement to atmospheres (atm).

2

Le Chatelier's Principle states that if a chemical system at equilibrium is stressed,

2

When the system A + B ⇌ C + D is at equilibrium,

3

Consider the following reversible reaction. In a 3.00 liter container, the following amounts are found in equilibrium: 0.0420 mole N2, 0.516 mole H2 and 0.0357 mole NH3. Find the equilibrium constant Keq. N2 + 3H2 ⇌ 2NH3

3

How many moles of Ca(NO₃)₂ are there in 75 mL of 0.25 M solution?

2

Calcualte the pH of a solution that has a [3.0 x 10-6] of HSO4

2

Strong acids are closest to...

2

If you have 1.5 moles of copper (Cu), how many grams is that?

3

Using the following chemical equation, how many grams of phosphorus are needed to produce 25.3 grams of diphosphorus pentaoxide?
P + O2 → P2O5

2

2.7 x 1025 molecules of MnO equals how many moles?

5

Match the chemical reactions with their respective type

  • A + B --> AB
  • 2H2O --> 2H2 + O2
  • H2 + I2 --> 2HI
  • AB --> A + B
  • NaOH + HCl --> NaCl + H2O
  • MgCl2 + Zn --> ZnCl2 + Mg
  • AB + CD --> AD + CB
  • C6H12O6 + 6O2 --> 6CO2 + 6 H2O
  • CxHy + O2 --> CO2 + H2O
  • A + BC --> AC + B
  • Synthesis
  • Decomposition
  • Single Replacement
  • Double Replacement
  • Combustion
2

Which of the following can be correctly said about 1.0 mole sample of Ag and 1.0 mole sample of Au? Select all that apply.

3

When 8 moles of aluminum react according to the reaction below, ______ moles of copper will be produced.

2Al + 3CuSO4 --> Al2(SO4)3 + 3Cu

2

On a hot day, a small, well-insulated building is significantly colder than the outside. A solid metal door leads to the outside, and a person placing their hand nearby but not touchng the door can feel warmth from the door. How does the heat from outside make it into the hand?

2

What is the melting point of the substance?

2

Match the following masses with the number of moles.

Draggable itemCorresponding Item
23 g of Na
1 mole
10.0 g of NaOH
2 moles
4.04 g of H2
0.5 moles
16.0 g of O2
0.25 moles
2

Balancing the equation; make sure you show your work.

2

When heat is added to boiling water, the temperature of the boiling water

3

What is wrong with this set up?

2

Endothermic reactions result in: (Select all that apply)

3

Using the following chemical reaction, determine how many moles of Mg(OH)2 will be produced if you start with 12 moles of H2O.
Mg + H2O → Mg(OH)2 + H2

3

P4 + Cl2 → PCl3
Calculate how many grams of phosphorus that reacted if 250g of phosphorus trichloride, PCl3 is produced by the above reaction.

2

Two metals of equal mass but different specific heat capacities are subjected to the same amount of heat. Which will undergo the smallest change in temperature?

3

Identify the acid, base, conjugate acid and conjugate base for the following:
HClO4 + H2O ⇄ H3O + ClO4

4

Using the following reaction:
CaCO3 + SO2 + other reactants --> CaSO3 + other products (no need to balance)
In a particular experiment, 255 g of CaCO3 was exposed to 135 g of SO2 (limiting) in the presence of an excess amount of other chemicals required for the reaction. What is the theoretical yield of CaSO3? If only 198 g of CaSO3 were produced, what would be the percent yield of CaSO3 in this experiment?

2

Which of the following is true for temperature?

2

A hot metal sinker of mass 68.2 grams at 99.8°C is dropped into a cup containing 125 mL of water at 22.4°C. The final temperature in the cup is 31.0°C. What is the specific heat capacity of the metal? Submit/show your work.

3

Consider the following heating curve for water and answer the following questions:
a. Describe as fully as you can what is happening for each section of the curve (for example, what is going on between A and B, B and C, etc.
b. What is the temperature at point B?
c. What is the temperature at point E?