Question

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The sodium salt of methyl orange has 7% sodium. What is the minimum molecular weight of the compound?​

Answer 1

Answer:

ans: 329

Explanation:

Let M be the minimum molecular weight of the compound.

7% of the compound is sodium. It is equal to 7/100×M=0.07M g sodium in 1 mole of compound.

At least, 1 mole of Na will be present in 1 mole of compound.

1 mole of sodium weighs 23 g.

Thus, 0.07M=23

M= 23/0.07 = 329 g/mol

Thus, the minimum molecular weight of the compound is 329 g/mol.

Hence, the correct ans is 329