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