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I am Lyosha [343]
2 years ago
6

The molar mass of copper(II) chloride (CuCl2) is 134. 45 g/mol. How many formula units of CuCl2 are present in 17. 6 g of CuCl2?

7. 88 × 1022 formula units 1. 84 × 1023 formula units 1. 91 × 1023 formula units 1. 42 × 1024 formula units.
Chemistry
1 answer:
Nesterboy [21]2 years ago
6 0

The number of formula units in the 17.6 g copper (II) chloride sample is 7.88\;\times\;10^2^2option A is correct.

The formula unit is given as the molecule of the compound with constituent atoms and bonds.

<h3>Computation for the number of formula units</h3>

The number of formula units in a mole of sample is equal to the Avogadro number. The Avogadro number is a constant with the value of 6.023\;\times\;10^2^3.

Thus, the number of formula units in copper (II) chloride are:

\rm 1\;mol=6.023\;\times\;10^2^3\;formula\;unit\\134.45\;g/mol=6.023\;\times\;10^2^3\;formula\;unit

The given mass of copper chloride is 17.6 g. The number of formula units is given as:

\rm 134.45\;g=6.023\;\times\;10^2^3\;units\\\\17.6\;g=\dfrac{6.023\;\times\;10^2^3}{134.45}\;\times\;17.6\;units\\\\ 17.6\;g=7.88\;\times\;10^2^2\;units

The number of formula units in the 17.6 g copper (II) chloride sample is 7.88\;\times\;10^2^2 units.

Thus, option A is correct.

Learn more about formula units, here:

brainly.com/question/19293051

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If a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed.

If a substance undergoes a chemical change, then it will not retain its original properties because a new substance is formed.

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So in shorter words its options 2 and 3

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A container was found in the home of the victim that contained 120 g of ethylene glycol in 550 g of liquid. How many drinks, eac
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0.432 drinks are toxic

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If the victim weighs 85kg, its letal dose is:

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The drinks are:

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Calculate the mass fraction of sodium chloride in the solution if 20 g of it is dissolved in 300 ml of water.
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The mass fraction of sodium chloride is 0.0625

<h3>What is the mass fraction of sodium chloride in the solution?</h3>

The mass fraction of sodium chloride is the ratio of the mass of sodium chloride to the total mass of the solution.

The mass fraction of sodium chloride is determined as follows;

mass of sodium chloride = 20 g

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Learn more about mass fraction at: brainly.com/question/14783710

#SPJ1

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