ReciQues-01-Key.pdf_, filename=_ReciQues-01-Key.pdf_, filename=_ReciQues-01-Key.pdf_, filename=_Re

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Chem 110 Recitation Problems – Chapter 1 ANSWER KEY – Answers are in BOLD TEXT 1 1. A standardized mass of 50.000 g is placed on an electronic balance. The following readings were obtained when the mass was weighed multiple times. Is this data accurate, precise, both, or neither? 48.176 g 48.171 g 48.174 g 48.179 g A. Accurate and precise B. Accurate but not precise C. Accurate but precision cannot be determined D. Precise but not accurate E. Precise but accuracy cannot be determined F. Not accurate and not precise G. Both precision and accuracy cannot be determined 2. Air is filtered before it is compressed into tanks for scuba divers. The filters remove all particles and contaminants from the air so it is just nitrogen gas, oxygen gas, and several other gaseous substances (very minor components). The air inside a scuba divers tank would fall under what classification? A. Heterogeneous mixture B. Homogeneous mixture C. Pure compound D. Pure element 3. How many milligrams (mg) are there in 0.429 kg?
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