Which of the following reactions can be described as an atom combination reaction? (a) Ca(g) + S(g) + 4 O(g) → CaSO4(s) (b) C(graphite) + 2 H2(g) → CH4(g) (c) C3H8(g) + 5O2(g) → 3 CO2(g) + 4 H2O(g) (d) C6H6(g) → 6 C(g) + 3 H2(g) (e) K(s) + Mn(s) + 2 O2(g) → KMnO4(s

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A: (a)

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A: Please find the below attachments.     Thank you

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Q: e mass, in grams,

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".