Molarity

5. Calculate the sodium ion concentration when 60.0 mL of 6.0 M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate.

Gas Law Problem

Nitrogen and Hydrogen gases react to form Ammonia. A closed, rigid cylinder contains a total of 0.750 mol of gas at 25 degrees C and 1.10 atm before the reaction takes place; the mole ratio of hydrogen to nitrogen in the cylinder is 3:2. Determine the temperature and pressure of the gas in the cylinder at the end of the reaction. Assume the cylinder walls do not absorb nor release heat. Neither the temperature nor the pressure remains constant. Otherwise, make any assumptions necessary to solve the problem.

Gas Problem

Ammonia gas at 223°C and 90. atm flows into a reactor at a rate of 500. L/min. Carbon dioxide at 223°C and 47 atm flows into the reactor at a rate of 600. L/min. What mass of urea is produced per minute by this reaction assuming 100% yield?

Molarity and dilution

What is the concentration of a solution in which 5.0 mL of a 4.5 M HCl is diluted to 250 mL of solution?

Vinegar and eggshells reaction

When vinegar and eggshells are combined a reaction ocurrs that produces new chemicals. Show a balanced equation for this reaction.