Multiple Choice
In the reaction 2H_2 + O_2 ightarrow 2H_2O, what is the total number of molecules reacting when 2 molecules of H_2 react with 1 molecule of O_2?
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3. Chemical Reactions
Stoichiometry
Multiple Choice
If 4.0 moles of NaOH react completely with excess CO2 according to the equation 2 NaOH + CO2 → Na2CO3 + H2O, how many moles of Na2CO3 can be produced?
A
1.0 mole
B
4.0 moles
C
2.0 moles
D
8.0 moles
Verified step by step guidance1
Identify the balanced chemical equation: \(2 \text{NaOH} + \text{CO}_2 \rightarrow \text{Na}_2\text{CO}_3 + \text{H}_2\text{O}\).
Determine the mole ratio between NaOH and Na\(_2\)CO\(_3\) from the balanced equation. For every 2 moles of NaOH, 1 mole of Na\(_2\)CO\(_3\) is produced.
Given 4.0 moles of NaOH, use the mole ratio to find the moles of Na\(_2\)CO\(_3\) produced: \(\text{moles of Na}_2\text{CO}_3 = \frac{1}{2} \times 4.0\) moles of NaOH.
Calculate the moles of Na\(_2\)CO\(_3\) by multiplying the given moles of NaOH by the mole ratio factor.
Interpret the result as the number of moles of Na\(_2\)CO\(_3\) produced when 4.0 moles of NaOH react completely with excess CO\(_2\).
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