Which of the following drugs has been clearly linked to crimes and violence?

What is the mole fraction of oxygen in a gas mixture that is 40.0% oxygen and 60.0% nitrogen by volume?

A solution is prepared by dissolving 17.75 g sulfuric acid, H2SO4, in enough water to make exactly 100.0 mL of solution. If the density of the solution is 1.1094 g/mL, what is the weight % H2SO4 in the solution?

How much water must be added to 42.0 g of CaCl2 to produce a solution that is 40.0 wt% CaCl2?

For a liquid solution made by dissolving a solid or a gas in a liquid, the

What volume of 3.00 M CH3OH solution is needed to provide 0.500 mol of CH3OH?

Identify the polar solvent.

Zinc reacts with hydrochloric acid according to the equation:  Zn + 2HCl -> ZnCl2 + H2       How many moles of H2 are produced from 20.0 g of Zn?

Which of the following would be considered a base under the Arrhenius definition?

Silver sulphide and hydrogen combine to form silver and hydrogen sulphide.  3.0 g of H2 and 100 g of Ag2S are used to produce 85.0 g of Ag. The equation for the reaction is:  Ag2S + H2 -> 2Ag + H2S a)    What is the actual yield of silver (Ag)? b)    Which reactant is the limiting reagent? Support your answer with calculations.  c)    What is the theoretical yield of silver?