Question

When sugar is burned, water vapor and carbon dioxide are produced. A sugar molecule has a specific number of carbon, hydrogen, and oxygen atoms. Use the balanced chemical equation to identify the number of carbon, hydrogen, and oxygen atoms in sugar. Sugar + 12O2 ? 11H2O + 12CO2

Answer 1

Sugar has ✔ 12 carbon atoms.

Sugar has ✔ 22 hydrogen atoms.

Sugar has ✔ 11 oxygen atoms.

Step-by-step explanation:

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Answer 2

Number of carbon, hydrogen, and oxygen atoms in sugar:

• C: 12
• H: 22
• O: 11

Step-by-step explanation:

1) Given balanced chemical equation:

• Sugar(s) + 12O₂(g) → 11H₂O(g) + 12CO₂(g)

2) Mass conservation law: in a chemical reaction, the atoms are not created nor destroyed; they recombine to form new substances, so the number of atoms of each kind in the reactants is equal to the number of atoms of the same kind in the products.

3) Balance.

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Atom Products = Reactants

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C 12CO₂ ⇒ 12 = 12 in sugar

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H 11H₂O ⇒ 11 × 2 = 22 = 22 in sugar

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O 12CO₂ ⇒ 12 × 2 = 24 12 × 2 = 24 in O₂ + x in sugar

11H₂O ⇒ 11

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24 + 11 = 35 = 24 + x

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Solve for x: 35 = 24 + x ⇒ x = 35 - 24 = 11 ∴ 11 O atoms in sugar

Conclusion:

Number of carbon, hydrogen, and oxygen atoms in sugar:

• C: 12
• H: 22
• O: 11