key-eng-fall07-q8059x02z4v

key-eng-fall07-q8059x02z4v - CHEM 2045C Quiz 2 Show your...

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CHEM 2045C: Quiz 2 NAME _________KEY_____________ N #_______________ Show your work for full credit Eng Q8059x02-zeta-4-v Potentially helpful information 1 in = 2.54 cm (exactly) 1 lb = 453.59 g 1 L = 1.0567 qt ° C = 5 / 9 ( ° F – 32) K = ° C + 273.15 For full credit, show all of your work legibly , observe all significant figures rules, and box your answers. 1. (4 pts) Give the missing name or chemical symbol of the element, as appropriate, for the following. S sulfur Ag silver aluminum Al potassium K 2. (2 pts) Convert 0.02500 ft 3 to cm 3 . 002500 12 1 254 1 707 9 3 3 3 3 3 3 3 3 3 3 . . . ft in ft cm in cm × × = 2 points each conversion factor (1 pt if they didn’t cube) 1 point for the answer (½ sig figs, ½ units) 3. (5 pts) Gold melts at 1.948 × 10 3 ° F. What is the melting point of gold in Kelvin? Change Fahrenheit to Celsius ° C = 5 / 9 ( ° F – 32) = 5 / 9 (3.215 × 10 3 ° F – 32) = 1064 ° C 1 pt Change Celsius to Kelvin K = ° C + 273.15 = 1064 ° C + 273.15 =
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