Exam 1 Solved - Introduction to Chemistry - Summer 2007 | CHEM 100, Exams of Chemistry

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ji Exam #1 Chem 100 Summer 2007. Ch1&2.1-2.9 100 pts (110pts possible) lay Name Helpful Hints: 2.54cm=Tin 454 g=1\lb Part 1. Fillin the blanks 5 pts Prefix Symbol Math equiv. (fe te 10° deci of 107 centi c fee milli m re@-> 6 Zorcre B 10 Part 2. Choose the Single closest or best answer. 5 pts each 2. What is the total length of two pieces of tubing which measure 4.50 cm and 3.222 cm? Express the answer to the correct number of significant figures. @772 em D)D) 7.7m B) 4.72 cm E) E} 8cm C) 7.722 cm 3. Malic acid, a compound used to increase the acidity of fruit-flavored products, freezes at 128°C and ils at 150°C. What is its phase at 100°C, a temperature used in food processing applications? solid D) a mixture of solid and liquid B) liquid E) a mixture of liquid and gas C) gas 4. A laboratory technician reports that the mass of a growth removed from a patient is 274.06 g. How many significant figures does this measurement contain? A)2 B)3 cya E) none of the above