Constant pressure and temperature problem

Question

Question 1: Which of the following pH levels would be the most acidic?

• pH 2
• pH 5
• pH 8
• pH 12

Question 2: If you drop a 25 gram piece of metal that has a temperature of 100 Celsius into 1000 grams of water at 20 Celsius, what best describes what would occur?

• The temperature lost by the metal will equal the temperature gained by the water.
• The heat lost by the metal will equal the heat gained by the water.
• The final temperature will be 60 Celsius.
• The final temperature will be more than 60 Celsius.

Question 3: Which of the following is not true regarding carbon?

• Carbon 12 is radioactive.
• Carbon can form long chains and rings.
• Carbon will bond with other carbon atoms.
• Carbon will readily bond with hydrogen and oxygen.

Question 4: What is the pH of a 0.00750 M solution of hydrochloric acid, HCl?

• pH = 1.45
• pH = 1.93
• pH = 2.12
• pH = 3.07

Question 5: A balloon that contains 0.750 moles of gas has a volume of 16.8 L. If the balloon expands to a volume of 25.4 L at a constant pressure and temperature, how many moles of gas would the balloon contain?

• 0.496 mol
• 0.882 mol
• 1.13 mol
• 6.45 mol