Iron reacts with chlorine gas, Cl2, to form iron(III) chloride, FeCl3 Write the balanced equation for this synthesis reaction.

2Fe + 3Cl2 --> 2 FeCl3

Explanation:

Fe + Cl2 -->  FeCl3

iron is balanced but chlorine isn't so we find what number can make each one equal

Fe +3Cl2 --> 2FeCl3

now we need to balance iron

2Fe + 3Cl2 --> 2 FeCl3

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the answer is 0.42 is that is an option. this question provides no info