Aluminum reacts with oxygen according to: $$4Al(s) + 3O_2(g) \rightarrow 2Al_2O_3(s)$$ . If $$27.0 \ g$$ of $$Al$$ ( $$M_r = 27 \ g \ mol^{-1}$$ ) reacts with $$32.0 \ g$$ of $$O_2$$ ( $$M_r = 32 \ g \ mol^{-1}$$ ), which reagent is the limiting reagent and what mass of $$Al_2O_3$$ ( $$M_r = 102 \ g \ mol^{-1}$$ ) is produced?

$$O_2$$ is limiting; $$51.0 \ g$$ of $$Al_2O_3$$ produced

$$Al$$ is limiting; $$51.0 \ g$$ of $$Al_2O_3$$ produced

$$O_2$$ is limiting; $$68.0 \ g$$ of $$Al_2O_3$$ produced

$$Al$$ is limiting; $$102.0 \ g$$ of $$Al_2O_3$$ produced

The pH of solution X is 1 and that of Y is 2. Which statement is correct about the hydrogen ion concentrations in the two solutions?

[H + ] in X is ten times that in Y .

[H + ] in X is half that in Y .

[H + ] in X is twice that in Y .

[H + ] in X is one tenth of that in Y .

Which solution contains 0.1 mol of sodium hydroxide?

100 cm 3 of 1.0 mol dm –3 NaOH

10 cm 3 of 0.1 mol dm –3 NaOH

1000 cm 3 of 1.0 mol dm –3 NaOH

Stoichiometry and Acid-Base Quiz

Authored by Nabila Jomaa

Chemistry

10th Grade

Used 3+ times

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MULTIPLE CHOICE QUESTION

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MULTIPLE CHOICE QUESTION

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Which of the following correctly describes an Arrhenius acid?

A substance that accepts a proton in solution

A substance that donates an electron pair

MULTIPLE CHOICE QUESTION

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Which of the following equations is correctly balanced?

MULTIPLE CHOICE QUESTION

1 min • 1 pt

MULTIPLE CHOICE QUESTION

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MULTIPLE CHOICE QUESTION

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MULTIPLE CHOICE QUESTION

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