a sample of 0.3127 mole of compound Li2ZO4 has a mass of 41.53g. The element Z is?

Fe
I
Cr
n
Br

Explain please how you got the answer

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1. Find the mass of 1 mole of the substance using proportions.
2. Find the mass of Li2 and O4 in the substance.
3. Subtract 2 from 1 to get the mass of Z.
4. Compare in the given answers to get Z.