• whats the Lewis structure for CH2F2

• Calculate the pH of a 0.051 M (C2H5)2NH solution (Kb = 1.3 10-3).

• A sample of gas (1.3 mol) occupies __________ L at 22 C and 2.5 atm

• how many moles of magnesium oxide are produces by the reaction of 3.82g of magnesium nitride with 7.73g of water? how many grams of excess reactant is left over?

• explain what happens to a gas when put into a container

• How do I find the vapor pressure of a 2.5 M NaCl solution if I have the volume of the vapor and the temperature but I don't know the number of moles of the vapor?

• How many moles of 2.7 M of solution of NaCl that has a volume of 362 mL?

• The pH of a 0.05 M solution of potassium hydroxide, KOH, is

• Calculate the molarity (M) of NO3- in a solution prepared by adding 750 mL of 0.600 M Al(NO3)3 and 100 mL of 0.300 M Al(NO3)3 . Assume volumes are additive.

• Consider the reversible reaction : A(g)--><-- 2B(g). At equilibrium, the concentration of A is 0.381 M and that of B is 0.154 M. What is the value of the equilibrium constant, Keq?

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