prequiz1t.125

prequiz1t.125 - Dr. Zellmer Time: 30 mins Chemistry 125...

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Dr. Zellmer Chemistry 125 Tuesday Time: 30 mins Winter Quarter 2012 January 3, 2012 Pre-quiz Name Rec. TA/time ---------------------------------------------------------------------------------------------------------------------------------------- Show ALL your work or EXPLAIN to receive full credit. R = 0.08206 L C atm/mol C K = 8.314 J/mol C K 1. (7 pts) The amount of lead, Pb, in the air on a particular day is 1.60 x 10 ! 10 lb/ft 3 . What is the mass (in kg ) of lead in 2.00 m 3 ? (1 in = 2.54 cm, 1.000 lb = 453.6 g) (You MUST use dimensional analysis to receive full credit !) 2. (8 pts) A quantity of heat equal to 600.0 cal is REMOVED from 40.0 g of water at an initial temperature of 45.0 o C. Calculate the FINAL temperature (in o C). (The specific heat of water is 1.00 cal/g C °C) Show your work . Copyright R. J. Zellmer, January 3, 2012 OVER . ..
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3. (3 pts) Correctly name or write the formulas for the following compounds. Also , are they ionic or molecular? Chromium (VI) sulfide
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This note was uploaded on 02/19/2012 for the course CHEM 125 taught by Professor Zellmer during the Winter '08 term at Ohio State.

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prequiz1t.125 - Dr. Zellmer Time: 30 mins Chemistry 125...

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