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Lerok [7]
3 years ago
6

How are an atoms chemical properties determined?

Chemistry
1 answer:
TiliK225 [7]3 years ago
5 0
Electrons determine the chemical properties. Protons and neutrons are in the nucleus the number of protons determines the number of electrons of an atom
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Which statement describes an intensive property of matter
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An intensive property is a property that does not depend on the amount of the substance in a system being measured. Examples are density and color. The opposite is called extensive where the properties depends on the amount of a substance.


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What is the concentration,in molarity, of a solution containing 10 moles of copper(ii) nitrate in 5.0 liters of solution?
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The  concentration  in  molarity  of  a  solution    containing  10  moles  of  copper(ii)  nitrate  in  5.0 Liters    of  solution   is  calculated   using  the  following  formula

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6 0
3 years ago
. KMnO4 oxidizes ethyl benzene to benzoic acid. If this reaction generally results in a 40 % experimental yield, how many grams
lyudmila [28]

Answer:

530.835 g

Explanation:

First we convert 244 g of benzoic acid (C₇H₆O₂) to moles, using its molar mass:

  • 244 g benzoic acid ÷ 122.12 g/mol = 2.00 moles benzoic acid

Theoretically,<em> one mol of ethyl benzene would produce one mol of benzoic acid</em>. But the experimental yield tells us that one mol of ethyl benzene will produce only 0.4 moles of benzoic acid.

With the above information in mind we convert 2.00 moles of benzoic acid into moles of ethyl benzene:

  • 2.00 moles benzoic acid * \frac{1molEthylBenzene}{0.4molBenzoicAcid} = 5.00 moles ethyl benzene

Finally we <u>convert moles of ethyl benzene </u>(C₈H₁₀)<u> into grams</u>, using its <em>molar mass</em>:

  • 5.00 moles ethyl benzene * 106.167 g/mol = 530.835 g ethyl benzene
7 0
3 years ago
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