2 years ago

suppose a log'smassis 5 kg after burning the mass of the ash is 1 kg explain what may have happened to the other 4 kg of mass

1 answer:

8 0

The wood has undergone a chemical change and has been transfered into energy and gas. Also, the smoke coming from the fire comes from the wood

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Sunny_sXe [5.5K]

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crimeas [40]

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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$x=1.45$

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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