Chapter 7 Exercise Answers

** 7.11 has been corrected
ODY - Remember that your problem set is due on test day (probably Friday 1/20) and that your work must lead to these answers for credit.  Units must be included. Please slash through units as they cancel. Your work may look different but should lead to the same answer with the same units/sig figs.

Honors - You have begun these exercises. Check the ones you should have completed. We will cover the rest the following week.

7.1 a. 2.0 mol water   d. 2.00 mol carbon dioxide

7.2 a 27 g water         d. 4.04 g molecular hydrogen

7.3 a 67 L Ar             d. 90. L helium

7.4 a 1.25 g/L             d. 0.761 g/L

7.5 44.4 g/mol

7.6 63.8 g/mol

7.7 Ne is twice as fast moving as Kr  (Graham's law is not on this test.)

7.8 a 42.88% C, 57.12% O     b 46.21% Zn, 19.86% Si, 33.93% O    c 3.09% H, 31.60% P, 65.31%O

7.9 45.691% water                           7.10 no calculations just give formula in simplest terms

7.11 a CH₂O     b Ca₃P₂      c Al(ClO₄)₃

7.12 a  CaCl₂     b   CsCl           c Al₂S₃       d Ni(NO₃)₂

7.13 C₆H₆

7.14 C₅H₁₀

7.15 C₄H₁₀

7.16 C₉H₈O₄