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Gases
Solution
Acids and Bases
100
The inverse relationship between pressure and volume is known as
Boyle's Law
100
What is the definition of molarity and molality?
Molarity is mol/L Molality is mol/kg
100
What is the definition of a Bronsted-Lowry acid?
It donates a proton
200
If a gas is at STP, what conditions is it at?
0 C, 1atm
200
I have 300mL of 5.4M HCl solution. How much distilled water must I add to create a 3.4M HCl solution?
175.47mL
200
If a solution has a pH of 4.3, then what is the hydroxide ion concentration?
2 x 10-10
300
What are the 3 properties of an ideal gas?
1) No intermolecular forces 2) No volume 3) All collisions are perfectly elastic
300
What is the equilibrium expression for the following reaction? A(s) + 2B(aq) -> 3C(g)
[C]^3/ [B]^2
300
Stomach acid contains HCl at a concentration of 0.03mol/L. What is the pH of stomach acid? What is the pOH?
pH = 1.52, pOH= 12.48
400
A balloon is inflated to 665mL volume at 27C. It is immersed in a dry ice bath at -78.5C. What is its volume, assuming the pressure remains constant?
431mL
400
Two moles of nitrogen dioxide gas combine to form one mole of dinitrogen tetroxide gas. Consider a system at equilibrium, where the product concentration of dinitrogen tetroxide is 4.0 x 10-2 mol/L and the reactant concentration is 1.4 x 10-1mol/L. What is the Keq for this reaction?
Keq= 2.04
400
Find the pH of a solution prepared by dissolving 0.035 mol of a NaOH(strong base) in 1.75L of distilled water.
pH= 12.30
500
How many liters of hydrogen gas will be produced at 280.0K and 0.947atm if 1.74mol of sodium react with excess water according to the following equation: 2Na(s) + 2H2O(l) -> 2NaOH(aq) + H2(g)
21.1L H2
500
If Keq is 1.65 x 10-3 at 2027oC for the reaction below, what is the equilibrium concentration of NO when [N2] = 1.8 x 10-3 and [O2] = 4.2 x 10? N2(g) + O2(g)  NO(g)
0.011
500
A vinegar sample is found to have 0.837M concentration. Its hydronium ion concentration is 3.86 x 10^-3M. Calculate Ka.
Ka= 1.78 x 10^-5