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Chromium (Cr) can combine with chlorine (Cl2) to form chromium chloride (CrCl3).

Which equation is a correct representation of this reaction?

Responses

2Cr + Cl2 → CrCl3

2 upper case C lower case r plus upper case C lower case l subscript 2 end subscript rightward arrow upper case C lower case r upper case C lower case l subscript 3 end subscript,

Cr + Cl2 → CrCl3

upper case C lower case r plus upper case C lower case l subscript 2 end subscript rightward arrow upper case C lower case r upper case C lower case l subscript 3 end subscript,

2Cr + 3Cl2 → 2CrCl3

2 upper case C lower case r plus 3 upper case C lower case l subscript 2 end subscript rightward arrow 2 upper case C lower case r upper case C lower case l subscript 3 end subscript,

2Cr + 3Cl2 → CrCl3