Multiple Choice
If 5.0 moles of C_3H_8 react completely with excess O_2 according to the equation C_3H_8 + 5 O_2 ightarrow 3 CO_2 + 4 H_2O, how many moles of CO_2 are produced?
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3. Chemical Reactions
Stoichiometry
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which one of the following contains the most moles of oxygen atoms?
A
1 mole of SO2
B
1 mole of O3
C
1 mole of CO2
D
1 mole of H2O
Verified step by step guidance1
Identify the number of oxygen atoms in one molecule of each compound: SO\_2 has 2 oxygen atoms, O\_3 has 3 oxygen atoms, CO\_2 has 2 oxygen atoms, and H\_2O has 1 oxygen atom.
Recall that 1 mole of any substance contains Avogadro's number (6.022 \times 10^{23}) of molecules.
Calculate the total moles of oxygen atoms in 1 mole of each compound by multiplying the number of oxygen atoms per molecule by 1 mole: for example, for SO\_2, total moles of oxygen atoms = 2 \times 1 mole.
Compare the total moles of oxygen atoms for each compound: SO\_2 (2 moles O), O\_3 (3 moles O), CO\_2 (2 moles O), and H\_2O (1 mole O).
Determine which compound has the greatest number of moles of oxygen atoms per mole of compound; the compound with the highest value contains the most moles of oxygen atoms.
