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Gnom [1K]
3 years ago
14

HELP FAST!! 20 POINTS!! Any one of these please!!!

Chemistry
1 answer:
Ann [662]3 years ago
6 0
Not sure about the first two but I think number three is B. sorry if I'm wrong
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Given: 4Na + O2 → 2Na2O In this chemical reaction, how many moles of Na2O will be produced if 2.90 moles of Na react completely?
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Since we already have the balanced equation, we know that the ratio between Na:Na_{2}O is 4:2 respectively.

So then we can set up a proportion to find the number of moles produced when 2.90 moles of Na react completely:

\frac{4mol_{Na}}{2mol_{Na_{2}O}} =\frac{2.90mol_{Na}}{xmol_{Na_{2}O}}

Then we cross multiply and solve for x:

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Therefore, we know that when 2.90 moles of Na react completely, there are 1.45 moles of Na_{2}O that are produced.

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2 years ago
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3 years ago
How many grams are in 2 moles of Iodine?
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