C. When 4.46 moles of ethylene, C2H4, burns in oxygen to give carbon dioxide and

Chemistry

1 answer:

Shtirlitz [24]3 years ago

3 0

Answer:

finding believability

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Which reaction is a decomposition reaction? A. 2KClO3 → 2KCl + 3O2 B. 4Na + O2 → 2Na2O C. ZnS + 3O2 → 2ZnO + 2SO2 D. 2NaBr + CaF

Vedmedyk [2.9K]

Answer:

Option A. 2KClO₃ → 2KCl + 3O₂

Explanation:

There are five basic general types of chemical reactions:

Decomposition reactions

Synthesis or combination reaction

Single replacement reactions

Double replacement reactions

Combustion reactions

The given reactions are:

2KClO₃ → 2KCl + 3O₂

Which is, indeed, a decomposition reaction because the reactant, KClO₃, is a single substance that undergoes a reaction in which it yields two new substances, known as products: KCl and O₂.

4Na + O₂ → 2Na₂O is a synthesis or combination reaction because two reactants, Na and O₂, combine for the formation of one single new product, Na₂O.

ZnS + 3 O₂ → 2ZnO + 2SO₂ is a single replacement reaction because oxygen is replacing Zn and S in ZnS to form ZnO and plus SO₂.

2NaBr + CaF₂ → 2NaF + CaBr₂ is a double replacement reaction because two ions (Br⁻ from NaBr and F⁻ from CaF₂) are exchanging places with other two ions (Na⁺ from NaBr and Ca²⁺ from CaF₂) two form two new ionic compounds (NaF and CaBr₂).

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Spontaneous generation is a mistaken idea because living things:

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Describe the mass of the reactants and products given the balanced chemical reaction.

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Answer:

The mass of the reactants equals the mass of the products.