# chemistry

posted by kellie

Solid magnesium metal reacts with chlorine gas according to the following equation:

Mg + Cl2 --> MgCl2

What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 13.2 g of Cl2

I got 7/24.3= .288
13.2/70.90= 1.861777

thats as far as i got and im stuck and don't know what to do next

1. bobpursley

YOu got moles of Mg, and moles of Cl2. The reaction then will be limited by the moles of Mg.

So you will get .288moles of MgCl2

massMgCl2=.288*molmassMgCl2

The equation is limited by the element you have the least moles of.

In this case it will be the Cl2. 13.2/70.9 = .1862 mol

massMgCl2 = .1862 mol * molmassMgCl2

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