sssh201612
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According to the balanced equation below, which of the following is equivalent to how many moles of AlCl3 can be made from 4.0 moles of Cl2?

2Al + 3Cl2 ---> 2AlCl3

a) 2.7 moles
b) 4.0 moles
c) 8.0 moles
d) 24 moles

Respuesta :

znk

Answer:

a) 2.7 mol

Explanation.:

2Al + 3Cl₂ ⟶ 2AlCl₃

We want to convert moles of Cl₂ to moles of AlCl₃.

Choose the conversion factor ( the correct molar ratio)

It is or either [tex]\frac{\text{3 mol Cl}_{2}}{\text{2 mol AlCl}_{3}}[/tex] or [tex]\frac{\text{2 mol AlCl}_{3}}{\text{3 mol Cl}_{2}}[/tex]

We choose the one with the desired units (mol AlCl₃) on top.

[tex]\text{Moles of AlCl}_{3} = \text{4.0 mol Cl}_{2} \times \frac{\text{2 mol AlCl}_{3}}{\text{3 mol Cl}_{2}} = \text{2.7 mol AlCl}_{3}[/tex]

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