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【Daily Question】May 21, 2018 – Participate to earn +2 wealth; +3 to +10 wealth for correct answers

2018-05-21View Original

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Fill-in-the-blank: Now, we want to prepare 1 liter of a 0.01000 mol/L K2Cr2O7 solution, (M=294.2 g/mol). The accuracy of the analytical balance used is ±0.1mg. If the required relative error is ±0.2%, then the weighing of K2Cr2O7 should be accurate to ( ). 0.0001g

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