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1.) The the following reaction is:

BaCO3 --> BaO + CO2

Decomposition reaction
Single replacement reaction
Combustion Reaction
Synthesis Reaction
Double replacement reaction

2.) When magnesium is burned in the presence of oxygen, it produces magnesium oxide according to the following chemical equation.

2Mg+O2->2MgO
If 3.45 grams of Mg are burned, how many grams of MgO are produced?

5.72
8.69
3.45
4.35

3.) When a molecule is separated into its component parts, it forms

compounds
atoms
protons
ions

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3 answers
  1. what are your answers for me to check?

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    bobpursley
  2. I think the first one is Decomposition reaction i dont know the second one and i think the third one is ions??

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  3. Decomposition is correct.
    #3 see this. https://www.google.com/search?q=atoms+and+compounds

    #2 is a stoichiometry problem.

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