Exam_1B_ans_White

Exam_1B_ans_White - Rockley, Fall 2011, Chem.1314 Exam #1....

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Rockley, Fall 2011, Chem.1314 Exam #1. Page 1 of 5. Name: ______________________ Name in BLOCK CAPITALS _________________ Lab Day: ____________________ TA Name _____________________ 1. Convert 77 K, the boiling temperature of liquid nitrogen, to Fahrenheit: A -170.6 B 350.2 C -321.1 D 662.3 E -196.15 2. A small cylinder of brass has a diameter of 1.4 cm and a height of 2.5 inches. It weighs 87.5 g. What is the density of the brass in g/cm 3 ? A 9.84 B 8.96 C 19.69 D 2.72 E 0.112 3. From the following list of ions and ionic radii (in pm) specify the pair of ions that will give the weakest ionic bonding: Mg 2+ 72; K + 138; Rb + 152 Ba 2+ 135; Cl 1- 181; O 2- 140; I - 220 A Mg 2+ and O 2- B Rb + and I - C Ba 2+ and I - D Rb + and O 2- E none of these is correct 4. Which of the following is incorrect ? A There are 3 atoms of oxygen per formula unit of sodium phosphite B There are 6 atoms of oxygen per formula unit of magnesium bicarbonate C There are 4 atoms of oxygen per formula unit of cesium perchlorate D There are 3 atoms of oxygen per formula unit of chlorous acid E There is 1 atom of nitrogen per formula unit of hydrocyanic acid 5. Give the name or symbol (whichever is missing) of:
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Exam_1B_ans_White - Rockley, Fall 2011, Chem.1314 Exam #1....

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