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MissPhiladelphia
The balanced chemical equation would be written as follows:

Na + Cl2 = NaCl2

We are given the amount of sodium to be used in the reaction. This will be the starting point of the calculation. The ratio of the reactants is 1 mole is to 1 mole. Therefore, we need an equal amount of 4 moles of Cl2 gas to completely react with the sodium metal.

Answer: 2 moles of chlorine gas will react.

Explanation

[tex]2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)[/tex]

According to reaction, 2 mole of sodium reacts with 1 mole [tex]Cl_2[/tex] gas

1 mole of sodium will react with = [tex]\frac{1}{2}[/tex] moles of [tex]Cl_2[/tex] gas.

Then , 4 moles of sodium will react with :

[tex]\frac{1}{2}\times 4\text{moles of } Cl_2=2 moles[/tex]

2 moles of chlorine gas will react.

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