Lesson 4.3.1.3
4.3.1.3 Mass changes when a reactant or product is a gas Quiz: AQA Chemistry, Unit 3
20 questions
In partnership with Revision Ninja
Lesson 4.3.1.3, Mass changes when a reactant or product is a gas: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 3: Quantitative chemistry, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
Why is the mass of a metal oxide greater than the original metal?
- Atoms shrink
- Oxygen combines
- Hydrogen escapes
- Heat is added
-
What happens to the mass when calcium carbonate is heated in an open container?
- It decreases
- It doubles
- It increases
- It stays constant
-
In the thermal decomposition of a metal carbonate, what leaves as a gas?
- Hydrogen
- Oxygen
- Carbon dioxide
- Nitrogen
-
Why does magnesium increase in mass when burned in air?
- Carbon is absorbed
- Nitrogen is lost
- Oxygen is added
- Water is formed
-
Why does copper oxide weigh more than the copper used to make it?
- Oxygen reacted
- Copper expanded
- Heat added mass
- Nitrogen reacted
-
Limestone (CaCO3) decomposes in an open tube and the solid mass falls from 10 g to 5.6 g. What is the gas?
- Water vapour
- Oxygen
- Hydrogen
- Carbon dioxide
-
A metal is 5 g and its oxide is 8 g after burning in air. How much oxygen reacted?
- 13 g
- 8 g
- 3 g
- 5 g
-
Why does an enclosed system show no mass change during a reaction?
- No substances escape
- Gases are destroyed
- Mass is lost
- Reactions stop
-
What best explains a mass loss during a reaction in an open flask?
- Solid expanded
- Volume decreased
- Gas escaped
- Heat destroyed mass
-
2Mg + O2 -> 2MgO (Mg = 24, MgO = 40). If 48 g of magnesium reacts completely, what mass of magnesium oxide forms?
- 48 g
- 80 g
- 40 g
- 64 g
-
What is a non-enclosed system?
- Mass is conserved
- Reactions cannot occur
- Nothing can enter
- Gases can escape
-
Why does a metal carbonate lose mass when heated?
- Metal evaporates
- Carbon dioxide escapes
- Water is created
- Oxygen is absorbed
-
Which reaction in an open container shows an increase in mass?
- Melting ice
- Dissolving salt
- Burning magnesium
- Heating carbonate
-
Calcium carbonate (Mr 100) is heated and all the carbon dioxide (Mr 44) escapes. What mass of carbon dioxide is released from 100 g of calcium carbonate?
- 100 g
- 56 g
- 22 g
- 44 g
-
What happens to the mass of iron when it rusts in air?
- It increases
- It decreases
- It stays same
- It halves
-
What is the best conclusion when a heated solid loses mass in an open crucible?
- Gas escaped
- Solid melted
- Oxygen was gained
- Heat added mass
-
In a closed system, how does the mass of products compare to reactants?
- Becomes zero
- Always decreases
- Stays the same
- Always increases
-
2Cu + O2 -> 2CuO. Using copper 12.7 g (Cu = 63.5, CuO = 79.5), what mass of copper oxide forms?
- 15.9 g
- 7.95 g
- 19.0 g
- 12.7 g
-
What apparatus is required to show that a gas product's mass is included in a reaction?
- Enclosed container
- Bunsen burner
- Evaporating basin
- Open beaker
-
A student heats 5.0 g of a carbonate and 3.0 g of solid remains. What mass of carbon dioxide was released?
- 8.0 g
- 2.0 g
- 5.0 g
- 3.0 g
Related quizzes
- Conservation of mass and balanced chemical equations Quiz · 4.3.1.1 · 20 questions
- Relative formula mass Quiz · 4.3.1.2 · 20 questions
- Chemical measurements Quiz · 4.3.1.4 · 20 questions
- Moles (HT only) Quiz · 4.3.2.1 · 20 questions
- Amounts of substances in equations (HT only) Quiz · 4.3.2.2 · 20 questions
- Using moles to balance equations (HT only) Quiz · 4.3.2.3 · 20 questions
- Limiting reactants (HT only) Quiz · 4.3.2.4 · 20 questions
- Concentration of solutions Quiz · 4.3.2.5 · 20 questions
- Percentage yield Quiz · 4.3.3.1 · 20 questions
- Atom economy Quiz · 4.3.3.2 · 20 questions