Question

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Answer 1

Explanation:

You have to count the number of atoms in both sides of the reaction to be equal, to make it a little easier you can make a list. So in the equation Na+H2O→NaOH+H2, there are

1−Na−1

2−H−3

1−O−1

So you multiply NaOH and H2O by 2, so you have 4 hydrogens in both sides, and then multiply Na by 2 to be equal to the NaOH you previously multiplied.

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Answer 2

Answer:

2Na + 2H2O → 2NaOH + H2

Explanation:

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