HW3 _200 PM_Answers

HW3 _200 PM_Answers - General Chemistry 1035 2:00 PM (T,...

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General Chemistry 1035 2:00 PM (T, Th) Homework 3 This homework is due on September 17 in class. Make sure you pick up a blank opscan in class. Make sure you have bubbled the correct student number. Failure to do so will result in an automatic zero for this homework. 1. Calculate the molar mass of tetraphosphorus decaoxide, a corrosive substance which can be used as a drying agent. A. 469.73 g/mol B. 283.89 g/mol C. 190.97 g/mol D. 139.88 g/mol E. 94.97 g/mol 2. Calculate the molar mass of Ca(BO 2 ) 2 6H 2 O. A. 273.87 g/mol B. 233.79 g/mol C. 183.79 g/mol D. 174.89 g/mol E. 143.71 g/mol 3. For which compound does a mass of 12.8 g have 0.254 moles? a) CH 3 Cl b) HC 2 H 3 O 2 c) HCOOH d) none of these
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4. Which of the following samples has the most moles of the compound? A. 50.0 g of Lithium oxide B. 75.0 g of CaO C. 200.0 g of Iron(III) oxide D. 50.0 g of CO 2 E. 100.0 g of SO 3 5. Potassium dichromate, is used in tanning leather, decorating porcelain and water proofing fabrics. Calculate the number of chromium atoms in 78.82 g of Potassium dichromate.
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HW3 _200 PM_Answers - General Chemistry 1035 2:00 PM (T,...

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