Module 10
True or False: for a gas solute dissolving in a liquid solvent, the solvent molecules must be attracted to the solute molecules enough to pull the solute molecules closer to one another.
True
What is the temperature at which the vapor pressure of a liquid is equal to normal atmospheric pressure?
Boiling point
What kind of energy does an apple have? Kinetic, potential, or both?
Potential
Identify the acid in the equation: NH3 + H2O —> NH4+ + OH-
H2O
True or false: the limiting reactant is responsible for determining how much product is produced
True
What is the molality of a solution made from 5.61 moles of KCl and 2.11 kg of water?
2.66 m
If 345.1 grams of CO2 are placed in a vessel whose volume is 32.1 liters at a temperature of 20.0 °C, what will the pressure be?
5.88 atm
If a 50.0 g object needs 1,145 Joules to increase its temperature by 10.0 °C, what is its specific heat capacity?
2.29 J/g(°C)
Write the balanced chemical equation for the reaction of HF with water.
A compound has an empirical formula of CH2 and a molecular mass of 70.1 amu. What is its molecular formula?
C5H10
Acetic acid has a boiling point of 118.5° C and a Kb of 3.08 °C/m. What is the boiling point of a 3.20 m solution of Ca(NO3)2 in acetic acid?
148.1 °C
A weather balloon is filled with 34.6 liters of helium at 24 °C and 1.02 atm. As the weather balloon rises, the surrounding temperature decreases, as does the pressure. When the balloon reaches an altitude where the temperature is 11 °C and the pressure is 0.21 atm, what will the volume of the balloon be?
160 L
A 1.50 kg iron object (c = 0.4521 J/g(°C)) at 110.0 °C releases 5,505 Joules of heat. What is its new temperature?
101.9 °C
What is the concentration (in M) of an ammonia (NH3) solution if 12.23 grams of ammonia are dissolved in enough water to make 560.0 mL of solution?
1.28 M
What is wrong with the following statement? In the reaction N2 + 3H2 —> 2NH3, 1 gram of N2 reacts with 3 grams of H2 to make 2 grams of NH3.
The word gram should be replaced by the word mole