Balanced Equations (AQA A-Level Chemistry): Quizzes

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Balanced Equations
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10 questions from this quiz

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What does balancing chemical equations ensure?

Conservation of mass & stoichiometry

In the balanced equation CH4+2O2→CO2+2H2OCH_4 + 2O_2 \rightarrow CO_2 + 2H_2O, how many O2O_2 molecules react?

2

What are spectator ions?

Ions that appear unchanged on both sides

What is the net ionic equation for HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l)HCl (aq) + NaOH (aq) \rightarrow NaCl (aq) + H_2O (l)?

H++OH−→H2OH^+ + OH^- \rightarrow H_2O

If 0.50 g of CaCO3CaCO_3 reacts completely, what mass of CO2CO_2 is produced (1:1 ratio)?

0.22 g

At RTP, what volume does 1 mole of any gas occupy?

24 dm³

If 30.0 cm³ of 0.1 mol/dm³ NaOHNaOH neutralises 25.0 cm³ acid (1:1), what is acid concentration?

0.12 mol/dm³

If 0.050 mol of MHCO3MHCO_3 weighs 4.2 g, what is its molar mass?

84 g/mol

What volume of CO2CO_2 is produced from 0.005 mol at RTP?

0.12 dm³

What is the second step in writing ionic equations?

Separate aqueous compounds into ions

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