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ss7ja [257]
2 years ago
6

A sample of carbon tetrachloride (CCI) contains 3 moles of the substance. How many atoms are there in the sample?

Chemistry
1 answer:
STALIN [3.7K]2 years ago
3 0

Answer:

Number of atoms =1.806×10²⁴

Explanation:

You have the number of moles of Carbon tetrachloride which is n=3

And you are looking for number of atoms that are in the sample, which are represented by the letter "N"

The formula that has both number of moles(n) and number of atoms(N) is written as n=N/Na

Na is called the Avogadros number and it is equal to 6.08×10²³, it never changes(it is a constant)

So you will substitute the number of moles and the avogadros number to you formula, and the only unknown will be the number of atoms which you are looking for

  • n=N/Na
  • 3=N(6.02×10²³)
  • N=1.806×10²⁴ atoms of CCl

NB: N does not represent the number of atoms only. It may also represent the number of particles or molecules...

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3 years ago
An iron nail rusts when exposed to oxygen. According to the following reaction, how many moles of iron(III) oxide will be formed
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Answer:

0.453 moles

Explanation:

The balanced equation for the reaction is:

2Fe(s) + 3O2(g)  ==>  2Fe2O3

From the equation,  mass of O2 involved = 16 x 2 x 3 = 96g

                                 mass of Fe2O3 involved = [(2x26) + 3 x 16] x 2

                                                                            = 100g

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                                  32.2g of O2 Will produce   100x32.2/96

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Therefore number of mole of 33.54g of Fe2O3 = 33.54/74

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3 years ago
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