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if 3 significant figures is required, correct answer: 0.123 wrong answers: 0.12, 0.13, 0.1234; if 3 decimal places is require

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What is the mass of 8.04 x 10-3 mol 02? A. 0.257 g B. 3.89 g C. 0.129 D. 5.03 x 10-4

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What is the empirical formula of C3H603? A. CH30 B. C6H1206 C. CH20 CHO

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