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

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

5070_w23_qp_11

MCQ

2023

Paper 1, Variant 1

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One mole of magnesium is dissolved in excess aqueous ethanoic acid, CH3COOH. How many moles of hydrogen, H2, will be produced?

5070_s12_qp_12

MCQ

2012

Paper 1, Variant 2

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How many moles of ethanoic acid, CH3CO2H, react with one mole of magnesium?

5070_w16_qp_11

MCQ

2016

Paper 1, Variant 1

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How many moles of ethanoic acid, CH3CO2H, react with one mole of magnesium?

5070_w16_qp_12

MCQ

2016

Paper 1, Variant 2

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A sample of magnesium hydroxide, Mg(OH)2, is made by adding an excess of aqueous sodium hydroxide to an aqueous solution containing 1.20 g magnesium sulfate, MgSO4. The mass of magnesium hydroxide formed is 0.26 g. What is the percentage yield of magnesium hydroxide?

5070_s19_qp_12

MCQ

2019

Paper 1, Variant 2

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The nitrogenous fertiliser urea has the structure shown...

5070_s19_qp_12

MCQ

2019

Paper 1, Variant 2

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The element chlorine has two isotopes, l C and . C l In the Periodic Table, chlorine is shown...

5070_w22_qp_11

MCQ

2022

Paper 1, Variant 1

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Questions Discovered

57