Check Atom Conservation in a Balanced Model - Practice 1

5 questions0m 0s

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A balanced chemical equation preserves the count of each element. Coefficients multiply entire formulas; subscripts stay part of the substance identity. Use the symbolic model only, not a physical reaction.

Worked example

In 2 H2 + O2 -> 2 H2O, there are 4 H atoms and 2 O atoms on each side.

Balanced equation 2 H2 + O2 -> 2 H2O is paired with atom-count rows. Four H and two O appear on each side. Separate count circles are bookkeeping, not a depiction of free atoms during reaction.

Question 1 Paper model: 2 H2 + 1 O2 -> 2 H2O. How many hydrogen atoms are represented on either side? Answer

Question 2 Paper model: 4 H2 + 2 O2 -> 4 H2O. How many hydrogen atoms are represented on either side? Answer

Question 3 Paper model: 6 H2 + 3 O2 -> 6 H2O. How many hydrogen atoms are represented on either side? Answer

Question 4 Paper model: 8 H2 + 4 O2 -> 8 H2O. How many hydrogen atoms are represented on either side? Answer

Question 5 Paper model: 10 H2 + 5 O2 -> 10 H2O. How many hydrogen atoms are represented on either side? Answer