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Sergio [31]
3 years ago
9

Elements - made up of Ex:

Chemistry
1 answer:
astra-53 [7]3 years ago
7 0
All elements are made up of atoms. ➢ Atoms are made up of protons, neutrons, and electrons. Two different kinds of atoms can combine to form a compound. A molecule is a combination of atoms that cannot be broken apart while still retaining the same properties as the larger substance that it is a part of.
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A fixed mass of a gas occupies 1000cm
Serhud [2]

Answer:

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Determine the number of moles in 4.21 x 10^23 molecules of CaCI2?????
Alla [95]

Explanation:

Given parameters:

Number of molecules = 4.21 x 10²³ molecules

Unknown parameters:

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Solution:

A mole can be defined as the amount of a substance that contains the avogadro's number of particles i.e 6.02 x 10²³

  To find the number of moles:

          Number of moles = \frac{number of molecules }{[tex]6.02 x 10^{23}}[/tex]

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8 0
3 years ago
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matrenka [14]

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<h3>What is lewis base? </h3>

Lewis base is a species that donates an electron pair.

In the above-given chemical equation, the O^{2-}is the lewis base which is donating an electron pair to the central atom of SO_3 to form SO_4^{-2}.

Hence, O^{2-} is the Lewis base in the following reaction:

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brainly.com/question/15570523

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(Correct me if I am wrong)

5 0
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The geocentric theory was once accepted as an explanation of how objects were positioned in our solar system. Which statement be
dusya [7]

Answer: c

Explanation:

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3 years ago
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