Answer:
balancing the equation we get c2h6 + 3o2 -------> 2h2o+ 2co2 look the totalass of the atoms in reactant is equal to the totalass of product ,hence the law is applied
I think the 1st pic, the 2nd one, and the 3rd one.
Explanation:
Hope this helps.
I don't really understand this...
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The answer is true