(05.06 LC) Which formula can be used to calculate the percent yield?

(07.05 LC) Which property of manganese dioxide helps it turn hydrogen peroxide into water faster than it would without it?

(06.03 MC) A 4.5-liter sample of a gas has 0.80 mole of the gas. If 0.35 mole of the gas is added, what is the final volume of the gas? Temperature and pressure remain constant.

Which of the drugs discussed in this class are most closely linked with crime?  How might these drugs cause crime?

(07.05 MC) The graph shows a sample of gas when it is hot, cold, and at room temperature.Which statement is correct about curves B and C?

(06.02 LC) What happens to the particles of a solid when the solid changes into a liquid?

(07.01 LC) On which of the following factors does the amount of energy absorbed by an endothermic reaction depend?

(05.02 MC) What is the mass of a sample of NH3 containing 3.80 × 1024 molecules of NH3?

Mixing barbiturates with alcohol can cause a ________________ effects where the combines result is ___________than the sum of the effects of each drug along.  

(07.01 LC) Which statement is true about endothermic and exothermic reactions?