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What is the volume of 3.2 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)?. . 7.0 L. . 14 L. . 22. L. . 72 L

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There are numerous information's already given in the question. The answer can be easily deduced using those given information's. 

Amount of chlorine gas = 3.2
1 mole of gas at STP = 22.4 liters
Then
Volume of chlorine gas = 3.2 * 22.4
                                      = 72 liter.
From the above deduction, it can be concluded that the correct option among all the options that are given in the question is the fourth option or the last option.

Answer : The volume of 3.2 moles of chlorine gas [tex](Cl_2)[/tex] at standard temperature and pressure (STP) is, 72 L

Solution : Given,

Moles of chlorine gas [tex](Cl_2)[/tex] = 3.2 moles

As we know that, at standard temperature and pressure (STP)

1 mole of chlorine gas contains 22.4 L volume of gas

So, 3.2 moles of chlorine gas contains [tex]22.4\times 3.2=71.68=72L[/tex] volume of gas

Therefore, the volume of 3.2 moles of chlorine gas [tex](Cl_2)[/tex] at standard temperature and pressure (STP) is, 72 L

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