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Chemistry test

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Chemistry 101 Review Questions for Exam 2 1. What is the molar mass of Ca(NO3)2? (a) 102 g/mol (b) 164 g/mol (c) 204 g/mol 2. What is the % by mass of Cl in CH2Cl2? (a) 83.5% (b) 19.8% (d) 150 g/mol (c) 41.8% (e) 116 g/mol (d) 94.1% 3. The average atomic weight of copper is 63.5 amu. Copper has two naturally occurring isotopes. One of the isotopes has an atomic weight of 62.9 and an abundance of 69.1%. The other isotope has an abundance of 30.9%. What is the atomic weight of this isotope? (a) 63.2 (b) 63.8 (c) 64.1 (d) 64.8 4. What is the coefficient (simplest whole number) on Al when t ...
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