Pre-AP Chem Spring Review

What is the limiting reactant if 10 moles of NH₃  react  with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

• NH₃
• NO
• N₂
• water

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

When is the number 22.4 used in a mole conversion?

• 1 mol = 22.4 g

• 1 mol = 22.4 L of a gas at STP

• 1 mol = 22.4 L of a 1 M solution

• 1 mol = 22.4 molecules

Which of the following is the measure of average kinetic energy of molecules?

• pressure
• heat energy
• volume
• temperature

Volume of a gas ____________ with increased temperature.

• decreases
• increases
• stays the same

When the temperature is constant (k) inside a balloon, if you add pressure on it, the volume will ..... 

• Decrease
• Increase
• Not Change at all
• Particles will solidify 

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

Which of the following will produce crystals if cooled or disturbed?

• unsaturated solution

• saturated solution

• supersaturated solution

• all of the above

Since "like dissolves like", water and oil will not mix because

• both of them are polar

• both of them are nonpolar

• oil is polar and water is nonpolar

• oil is nonpolar and water is polar

If a solution is 2.5 M, which conversion factor could you use?

• 1 mol = 2.5 L

• 1 L = 2.5 mol

• 2.5 L = the given moles

• 2.5 g = 1 mol