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CaHeK987 [17]
2 years ago
14

Matter is neither created nor destroyed in a chemical reaction

Chemistry
1 answer:
olga_2 [115]2 years ago
8 0
This is true according to the Law of Conservation of Mass.

Hope this helps! :)
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What is the total number of oxygen atoms represented in the formula na2c03.10h2o?
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As per the given chemical formula- Na2CO3.10H2O, one mole of the chemical compound contains 13 moles of oxygen atoms. Hence

Number of moles of oxygen atoms in one mole of Na2CO3.10H2O = 13

number of moles of oxygen atoms in 0.2 moles of Na2CO3.10H2O = 13 X 0.2 = 2.6

Now, one mole of a substance contains 6.022 X 10^23 particles of the substance. Thus

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number of moles of oxygen atoms in 2.6 moles of oxygen atoms = 2.6 X 6.022 X 10^23 = 15.657 X 10^23

= 1.566 X 10^24

Thus, there are 1.566 X 10^24 atoms of oxygen in 0.2 moles of Na2CO3.10H2O.
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