Question:

AP Chemistry exam part 5!! have tons of fun!?

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23. How does the H+ ion concentration of a solution that has a ph of 3 compare with the H+ ion concentration of a solution with a ph of 6.

a. 3 times greater

b. 3 times less

c. 1000 times less

d. 1000 times greater.

24. An ideal gas at a temperature of 273 Kelvins and a pressure of 760 torr occupies a volume of 11.2 liters. How many moles of gas are there?

a. 0.673 moles

b. 0.5 moles

c. 2.1 moles

d. 1.0 moles

25. A sample of gas contains 1.5 moles and a volume of 50 L. If more gas is added and the new volume is 150 L, how many moles of gas will the new volume contain. Assume no change in temperature or pressure.

a. 0.5 moles

b. 4.5 moles

c. 3 moles

d. Cannot determine from information given.

26. As the temperature of a liquid increases, the vapor pressure of the liquid generally:

a. Depends upon the type of intermolecular forces.

b. Stays the same.

c. Decreases

d. Increases