DP Chemistry (first assessment 2025)

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Reactivity 2. How much, how fast and how far? » Reactivity 2.1—How much? The amount of chemical change » Reactivity 2.1.2—The mole ratio of an equation can be used to determine: • the masses and/or volumes of reactants and products • the concentrations of reactants and products for reactions occurring in solution. Calculate reacting masses and/or volumes and concentrations of reactants and products.

Reactivity 2.1.2—The mole ratio of an equation can be used to determine: • the masses and/or volumes of reactants and products • the concentrations of reactants and products for reactions occurring in solution. Calculate reacting masses and/or volumes and concentrations of reactants and products.

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Directly related questions

22N.1A.SL.TZ0.3:
How many moles of carbon dioxide are produced by the complete combustion of 7.0 g of ethene, C₂H₄ (g)?

M_r = 28

A. 0.25

B. 0.5

C. 0.75

D. 1.0
22N.1A.SL.TZ0.3:
How many moles of carbon dioxide are produced by the complete combustion of 7.0 g of ethene, C₂H₄ (g)?

M_r = 28

A. 0.25

B. 0.5

C. 0.75

D. 1.0
22N.2.SL.TZ0.5a:
Calculate the amount, in mol, of sulfur dioxide produced when 500.0 g of lignite undergoes combustion.

S (s) + O₂ (g) → SO₂ (g)
22N.2.SL.TZ0.5a:
Calculate the amount, in mol, of sulfur dioxide produced when 500.0 g of lignite undergoes combustion.

S (s) + O₂ (g) → SO₂ (g)
22N.2.SL.TZ0.a:
Calculate the amount, in mol, of sulfur dioxide produced when 500.0 g of lignite undergoes combustion.

S (s) + O₂ (g) → SO₂ (g)
19M.1A.SL.TZ1.2:
What volume of carbon dioxide, CO₂ (g), can be obtained by reacting 1 dm³ of methane, CH₄ (g), with 1 dm³ of oxygen, O₂ (g)?

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (l)

A. 0.5 dm³

B. 1 dm³

C. 2 dm³

D. 6 dm³
19M.1A.SL.TZ1.2:
What volume of carbon dioxide, CO₂ (g), can be obtained by reacting 1 dm³ of methane, CH₄ (g), with 1 dm³ of oxygen, O₂ (g)?

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (l)

A. 0.5 dm³

B. 1 dm³

C. 2 dm³

D. 6 dm³
19M.1A.SL.TZ1.2:
What volume of carbon dioxide, CO₂ (g), can be obtained by reacting 1 dm³ of methane, CH₄ (g), with 1 dm³ of oxygen, O₂ (g)?

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (l)

A. 0.5 dm³

B. 1 dm³

C. 2 dm³

D. 6 dm³
19M.1A.SL.TZ1.2:
What volume of carbon dioxide, CO₂ (g), can be obtained by reacting 1 dm³ of methane, CH₄ (g), with 1 dm³ of oxygen, O₂ (g)?

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (l)

A. 0.5 dm³

B. 1 dm³

C. 2 dm³

D. 6 dm³
19N.2.SL.TZ0.2a(i): Determine the mole ratio of S2O32− to O2, using the balanced equations.
19N.2.SL.TZ0.2a(i): Determine the mole ratio of S2O32− to O2, using the balanced equations.
19N.2.SL.TZ0.a(i): Determine the mole ratio of S2O32− to O2, using the balanced equations.
19N.2.SL.TZ0.2a(i): Determine the mole ratio of S2O32− to O2, using the balanced equations.
19N.2.SL.TZ0.2a(i): Determine the mole ratio of S2O32− to O2, using the balanced equations.
19N.2.SL.TZ0.a(i): Determine the mole ratio of S2O32− to O2, using the balanced equations.
19N.2.SL.TZ0.2a(ii):
Calculate the number of moles of oxygen in the day 0 sample.
19N.2.SL.TZ0.2a(ii):
Calculate the number of moles of oxygen in the day 0 sample.
19N.2.SL.TZ0.a(ii):
Calculate the number of moles of oxygen in the day 0 sample.
19N.2.SL.TZ0.2a(ii):
Calculate the number of moles of oxygen in the day 0 sample.
19N.2.SL.TZ0.2a(ii):
Calculate the number of moles of oxygen in the day 0 sample.
19N.2.SL.TZ0.a(ii):
Calculate the number of moles of oxygen in the day 0 sample.
19N.2.SL.TZ0.6a(ii):
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate.
19N.2.SL.TZ0.6a(ii):
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate.
19N.2.SL.TZ0.a(ii):
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate.
19N.2.SL.TZ0.6a(ii):
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate.
19N.2.SL.TZ0.6a(ii):
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate.
19N.2.SL.TZ0.a(ii):
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate.
21M.1A.SL.TZ1.4:
What is the coefficient of $HCl$ (aq) when the equation is balanced using the smallest possible whole numbers?

$__CuO (s)+ __HCl {(aq) → __CuCl}_{2} {(aq) + __H}_{2} O (l)$

A. 1

B. 2

C. 3

D. 4
21M.1A.SL.TZ1.4:
What is the coefficient of $HCl$ (aq) when the equation is balanced using the smallest possible whole numbers?

$__CuO (s)+ __HCl {(aq) → __CuCl}_{2} {(aq) + __H}_{2} O (l)$

A. 1

B. 2

C. 3

D. 4
21M.1A.SL.TZ1.4:
What is the coefficient of $HCl$ (aq) when the equation is balanced using the smallest possible whole numbers?

$__CuO (s)+ __HCl {(aq) → __CuCl}_{2} {(aq) + __H}_{2} O (l)$

A. 1

B. 2

C. 3

D. 4
21M.1A.SL.TZ1.4:
What is the coefficient of $HCl$ (aq) when the equation is balanced using the smallest possible whole numbers?

$__CuO (s)+ __HCl {(aq) → __CuCl}_{2} {(aq) + __H}_{2} O (l)$

A. 1

B. 2

C. 3

D. 4
22M.2.SL.TZ1.1b(i):
Calculate the amount of magnesium, in mol, that was used.
22M.2.SL.TZ1.1b(i):
Calculate the amount of magnesium, in mol, that was used.
22M.2.SL.TZ1.b(i):
Calculate the amount of magnesium, in mol, that was used.
22M.2.SL.TZ1.1b(i):
Calculate the amount of magnesium, in mol, that was used.
22M.2.SL.TZ1.1b(i):
Calculate the amount of magnesium, in mol, that was used.
22M.2.SL.TZ1.b(i):
Calculate the amount of magnesium, in mol, that was used.
22M.2.SL.TZ1.1d(i):
Calculate coefficients that balance the equation for the following reaction.

__ Mg₃N₂(s) + __ H₂O (l) → __ Mg(OH)₂(s) + __ NH₃(aq)
22M.2.SL.TZ1.1d(i):
Calculate coefficients that balance the equation for the following reaction.

__ Mg₃N₂(s) + __ H₂O (l) → __ Mg(OH)₂(s) + __ NH₃(aq)
22M.2.SL.TZ1.d(i):
Calculate coefficients that balance the equation for the following reaction.

__ Mg₃N₂(s) + __ H₂O (l) → __ Mg(OH)₂(s) + __ NH₃(aq)
22M.2.SL.TZ1.1d(i):
Calculate coefficients that balance the equation for the following reaction.

__ Mg₃N₂(s) + __ H₂O (l) → __ Mg(OH)₂(s) + __ NH₃(aq)
22M.2.SL.TZ1.1d(i):
Calculate coefficients that balance the equation for the following reaction.

__ Mg₃N₂(s) + __ H₂O (l) → __ Mg(OH)₂(s) + __ NH₃(aq)
22M.2.SL.TZ1.d(i):
Calculate coefficients that balance the equation for the following reaction.

__ Mg₃N₂(s) + __ H₂O (l) → __ Mg(OH)₂(s) + __ NH₃(aq)

Sub sections and their related questions

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