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chem practicefinal-summer

# chem practicefinal-summer - Molar masses that you may find...

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Molar masses that you may find useful… NO = 30.01 g/mol PbS = 239.27 g/mol PCl3 = 137.32 g/mol Ca3(PO4)2 = 310.18 g/mol Al2O3 = 101.96 g/mol Ba3(PO4)2 = 601.93 g/mol Fe2O3 = 159.7 g/mol C6H12O6 = 180.2 g/mol Fe(NO3)3 = 241.9 g/ mol Al(NO2)3= 165.01 g/mol H2SO4 = 98.12 g/mol C8H18 = 114.22 g/mol CH4 = 16.04 g/mol H2S = 34.09 g/mol K3PO4 = 212.27 g/mol NO2 = 46.01 g/mol H2O = 18.02 g/mol HNO3 = 63.02 g/mol 1. How many significant figures should the answer to the following calculation be reported to? ( 98.116 + 2.63 ) / 100.000 a. 2 b. 3 c. 4 d. 5 e. 6 2. Which of the following sets of information represent the bromide ion? protons neutrons electrons 3. Name the following compound: Ca3N2 4. The floor of a room is 78.9 square feet. Carpeting is sold in units of square yards. Convert this value to square yards. (Hint: 3.00 feet = 1.00 yard) a. 26.3 yd2 b. 237 yd2 c. 710.yd2 d. 2.92 yd2 e. 8.77 yd2

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5. Determine the ground state electron configuration for Sn (Z=50). 6. A liquid has a density of 3.88 g/mL. What volume (in L) of the liquid must be measured to obtain a mass of 77.4 grams? a. 3.00 x 10-1 L b. 1.99 x 10-2 L c. 5.01 x 10-2 L d. 3.33 x 10-3 L e. 6.48 x 10-3 L 7. Place the following in order of decreasing atomic size. Ne P S
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