Subsection 3.3. The mole and the Avogadro constant for Chemistry, O Level - revisedeck

3.3. The mole and the Avogadro constant

A subsection of Chemistry, 5070, through 3. Stoichiometry

Listing 10 of 57 questions

In a titration, a 25.0 cm3 sample of 0.100 mol / dm3 sodium hydroxide is exactly neutralised by 16.2 cm3 of dilute sulfuric acid. The equation for the reaction is shown...

5070_w24_qp_12

MCQ

2024

Paper 1, Variant 2

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A 10 cm3 sample of a gaseous hydrocarbon is completely burnt in oxygen. The total volume of the products is 70 cm3. All gas volumes are measured at room temperature and pressure. Which equation represents the combustion of the hydrocarbon?

5070_s12_qp_11

MCQ

2012

Paper 1, Variant 1

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A 10 cm3 sample of a gaseous hydrocarbon is completely burnt in oxygen. The total volume of the products is 70 cm3. All gas volumes are measured at room temperature and pressure. Which equation represents the combustion of the hydrocarbon?

5070_s12_qp_12

MCQ

2012

Paper 1, Variant 2

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One mole of a sugar, (CH2O)6, is burned. Which volume of oxygen, measured at room temperature and pressure, is required for complete combustion of the sugar?

5070_s19_qp_11

MCQ

2019

Paper 1, Variant 1

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10 cm3 of propane is burned in 70 cm3 of oxygen in a closed container. C3H8+ 5O2 3CO2+ 4H2OWhat is the total volume of gas present after the reaction?

5070_s21_qp_12

MCQ

2021

Paper 1, Variant 2

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Sodium hydrogencarbonate decomposes on heating. 2NaHCO3 → Na2CO3 + H2O + CO2 In an experiment, a 5.0 mol sample of sodium hydrogencarbonate is heated. Which volume of carbon dioxide, measured at room temperature and pressure, is evolved?

5070_w13_qp_11

MCQ

2013

Paper 1, Variant 1

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The complete combustion of 20 cm3 of a gaseous alkane, X, requires 130 cm3 of oxygen. Both volumes were measured at r.t.p What could be the identity of X?

5070_w13_qp_12

MCQ

2013

Paper 1, Variant 2

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Sodium hydrogencarbonate decomposes on heating. 2NaHCO3 → Na2CO3 + H2O + CO2 In an experiment, a 5.0 mol sample of sodium hydrogencarbonate is heated. Which volume of carbon dioxide, measured at room temperature and pressure, is evolved?

5070_w13_qp_12

MCQ

2013

Paper 1, Variant 2

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Methane burns in oxygen. CH4+ 2O2 CO2+ 2H2O10 cm3 of methane is reacted with 25 cm3 of oxygen. What is the total volume of gas that would be measured after the reaction?

5070_w21_qp_11

MCQ

2021

Paper 1, Variant 1

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250 cm3 of 1.0 mol / dm3 hydrochloric acid reacts with an excess of solid sodium carbonate. The equation is shown...

5070_w22_qp_11

MCQ

2022

Paper 1, Variant 1

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Questions Discovered

57