September 8

September 8 - 3. (A) Write out the following numbers in...

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September 8, 2008 Name: _________________________________ Chemistry 1200 Dr. McGuire Quiz 1 1. Identify the following processes or properties as either chemical or physical by placing a P (physical) or C (chemical) next to each: __ C __ Boiling an egg or baking bread __ P __ The blueness of the sky on a clear day __ P __ The spray from opening a bottle of champagne __ C __ The aging of wine or cheese __ P __ Ethylene glycol boils at 198 C 2. Which of the following substances is a mixture ? (i) a solution of sodium chloride in water (ii) an alloy of zinc and copper (iii) carbon dioxide gas (iv) copper(II) chloride (v) blood A) (i) only B) (i) and (ii) only C) (iii) and (iv) only D) (iii), (iv) and (v) only E) (i), (ii) and (v) only
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Unformatted text preview: 3. (A) Write out the following numbers in scientific notation: 2050.0 ____ 2.050 x 10 3 0.00002050 _____ 2.050 x 10-5 1.0 ______ 1.0 x 10 0.727 ______ 7.27 x 10-1 (B) State the number of significant figures in each of the following: 2001 __ 4 ___ 186,000.0 __ 7 ___ 6.62 x 10-27 ___ 3 __ 1500 ___ 2 or 4. It is ambiguous. Thats why we use scientific notation. 4. A cube of iron has a mass of 15.37 g. If each side of the cube has dimensions of 1.25 cm, what is the density of iron? A) 1.23 g/cm 3 B) 1.92 g/cm 3 C) 3.00 g/cm 3 D) 7.87 g/cm 3 E) 10.5 g/cm 3 5. Which of the following substances is NOT an element? A) Cr B) Co C) Cd D) CO E) Cl...
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September 8 - 3. (A) Write out the following numbers in...

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