CHEM 162 EXAM (IN-CLASS)
PRACTICE PROBLEMS QUESTIONS
AND ANSWERS
Calculate molarity when 734g of lithium sulfate are dissolved in 2500mL of water? -
Correct Answers -2.7 Molar
Calculate the molarity when 9.0x10^23 molecules of CCl4 are dissolved in 500mL of
water? - Correct Answers -3 Molar
How much water would 1 need to add to a solution made of 500mL of a 2.4M KCl
solution to make the final concentration 1.0M - Correct Answers -7.0x10^2mL or .70L
What's the volume of O2(g) occupies 38.7mL at 751mmHg what's the volume if the
pressure changes to 359mmHg - Correct Answers -80.9mL >>> 81mL
Obtain 79.4mL of CO2(g) at 0 Celsius, how many mL of gas would you obtain at 27
Celsius? - Correct Answers -87mL
Pressure of 5.0x10^1 atm at depth 5.0x10^2. The volume of the balloon is 5.0L at what
depth of water temperature of 4 Celsius what would the volume of the balloon be on
surface (1.0atm pressure) at temp. of 11 Celsius? - Correct Answers -300L or 3x10^2L
What volume of a .040M HCl solution is needed to reach with 40.0mL of a .090M NaOH
solution - Correct Answers -90mL or .090L
What's the concentration of potassium hydroxide solution when 68.6mL is needed to
reach the equivalence point with 30.0mL of a .200M sulfuric acid (H2SO4) - Correct
Answers -.175M
A 50.0L cylinder of nitrogen N2 has a pressure of 17.1 atm at 23.0 Celsius, what's the
mass of nitrogen in the cylinder? - Correct Answers -986g
What's the density of carbon tetra hydride gas at 125 Celsius and 3.50atm? - Correct
Answers -1.72g/L
PRACTICE PROBLEMS QUESTIONS
AND ANSWERS
Calculate molarity when 734g of lithium sulfate are dissolved in 2500mL of water? -
Correct Answers -2.7 Molar
Calculate the molarity when 9.0x10^23 molecules of CCl4 are dissolved in 500mL of
water? - Correct Answers -3 Molar
How much water would 1 need to add to a solution made of 500mL of a 2.4M KCl
solution to make the final concentration 1.0M - Correct Answers -7.0x10^2mL or .70L
What's the volume of O2(g) occupies 38.7mL at 751mmHg what's the volume if the
pressure changes to 359mmHg - Correct Answers -80.9mL >>> 81mL
Obtain 79.4mL of CO2(g) at 0 Celsius, how many mL of gas would you obtain at 27
Celsius? - Correct Answers -87mL
Pressure of 5.0x10^1 atm at depth 5.0x10^2. The volume of the balloon is 5.0L at what
depth of water temperature of 4 Celsius what would the volume of the balloon be on
surface (1.0atm pressure) at temp. of 11 Celsius? - Correct Answers -300L or 3x10^2L
What volume of a .040M HCl solution is needed to reach with 40.0mL of a .090M NaOH
solution - Correct Answers -90mL or .090L
What's the concentration of potassium hydroxide solution when 68.6mL is needed to
reach the equivalence point with 30.0mL of a .200M sulfuric acid (H2SO4) - Correct
Answers -.175M
A 50.0L cylinder of nitrogen N2 has a pressure of 17.1 atm at 23.0 Celsius, what's the
mass of nitrogen in the cylinder? - Correct Answers -986g
What's the density of carbon tetra hydride gas at 125 Celsius and 3.50atm? - Correct
Answers -1.72g/L
