QUIZ
1. When driving a car, a legal limit for ethanol (Mr = 46.0) is 80 mg per 100 cm3 of blood. What
is this concentration in mol/dm3?
2. A gas cylinder contains 4.4 kg of propane (C3H8). How many propane molecules are in the
cylinder? (The Avogadro constant, L = 6.02 × 1023 mol–1) (Ar C:12, Ar H: 1)
3. Calculate the number of molecules in 11.2 liters of SO2 gas at STP! (Ar S: 32, Ar O:16)
4. What is the empirical formula of an oxide of nitrogen (NxOy) that contains 26% nitrogen by
mass? (Ar N: 14)
QUIZ
1. When driving a car, a legal limit for ethanol (Mr = 46.0) is 80 mg per 100 cm3 of blood. What
is this concentration in mol/dm3?
2. A gas cylinder contains 4.4 kg of propane (C3H8). How many propane molecules are in the
cylinder? (The Avogadro constant, L = 6.02 × 1023 mol–1) (Ar C:12, Ar H: 1)
3. Calculate the number of molecules in 11.2 liters of SO2 gas at STP! (Ar S: 32, Ar O:16)
4. What is the empirical formula of an oxide of nitrogen (NxOy) that contains 26% nitrogen by
mass? (Ar N: 14)
QUIZ
1. When driving a car, a legal limit for ethanol (Mr = 46.0) is 80 mg per 100 cm3 of blood. What
is this concentration in mol/dm3?
2. A gas cylinder contains 4.4 kg of propane (C3H8). How many propane molecules are in the
cylinder? (The Avogadro constant, L = 6.02 × 1023 mol–1) (Ar C:12, Ar H: 1)
3. Calculate the number of molecules in 11.2 liters of SO2 gas at STP! (Ar S: 32, Ar O:16)
4. What is the empirical formula of an oxide of nitrogen (NxOy) that contains 26% nitrogen by
mass? (Ar N: 14)
QUIZ
1. When driving a car, a legal limit for ethanol (Mr = 46.0) is 80 mg per 100 cm3 of blood. What
is this concentration in mol/dm3?
2. A gas cylinder contains 4.4 kg of propane (C3H8). How many propane molecules are in the
cylinder? (The Avogadro constant, L = 6.02 × 1023 mol–1) (Ar C:12, H: 1)
3. Calculate the number of molecules in 11.2 liters of SO2 gas at STP! (Ar S: 32, O:16)
4. Hydrogen chloride gas (7.3 g) is in a container at a pressure of 1 atmosphere and a
temperature of 25 oC. (Ar Cl:35.5)
(1) How many moles of gas are present?
(2) How many molecules of gas are present?
5. Formic acid (HCOOH) is a liquid monoprotic acid. What mass of formic acid should be taken
and diluted to obtain 1.00 liter of a 0.075 M solution?
QUIZ
1. When driving a car, a legal limit for ethanol (Mr = 46.0) is 80 mg per 100 cm3 of blood. What
is this concentration in mol/dm3?
2. A gas cylinder contains 4.4 kg of propane (C3H8). How many propane molecules are in the
cylinder? (The Avogadro constant, L = 6.02 × 1023 mol–1) (Ar C:12, H: 1)
3. Calculate the number of molecules in 11.2 liters of SO2 gas at STP! (Ar S: 32, O:16)
4. Hydrogen chloride gas (7.3 g) is in a container at a pressure of 1 atmosphere and a
temperature of 25 oC. (Ar Cl:35.5)
(1) How many moles of gas are present?
(2) How many molecules of gas are present?
5. Formic acid (HCOOH) is a liquid monoprotic acid. What mass of formic acid should be taken
and diluted to obtain 1.00 liter of a 0.075 M solution?
QUIZ
1. When driving a car, a legal limit for ethanol (Mr = 46.0) is 80 mg per 100 cm3 of blood. What
is this concentration in mol/dm3?
2. A gas cylinder contains 4.4 kg of propane (C3H8). How many propane molecules are in the
cylinder? (The Avogadro constant, L = 6.02 × 1023 mol–1) (Ar C:12, H: 1)
3. Calculate the number of molecules in 11.2 liters of SO2 gas at STP! (Ar S: 32, O:16)
4. Hydrogen chloride gas (7.3 g) is in a container at a pressure of 1 atmosphere and a
temperature of 25 oC. (Ar Cl:35.5)
(1) How many moles of gas are present?
(2) How many molecules of gas are present?
5. Formic acid (HCOOH) is a liquid monoprotic acid. What mass of formic acid should be taken
and diluted to obtain 1.00 liter of a 0.075 M solution?