EXAM 2 VERSION A CH 313 N Date: 10/26/20071.The chemical formula for cocaine is C17H21NO4. What is thepercent carbon in cocaine?A)32.2B)67.3C)8.43D)46.72.Analysis of calcium carbide showed its mass composition is 62.5% calcium and 37.5% carbon. What is its empirical formula?3.Consider the balanced equation:3NaHCO3+ C6H8O7→3CO2+ 3H2O + Na3C6H5O7What mass of CO2is produced when 200 g of NaHCO3 undergoes reaction?4.Which of these compounds is not a strong acid?5.A gas occupies a volume of 525 mL at a pressure of 1.00 atm. What is the new volume of the gas when the pressure is doubled?A)104 mLB)263 mLC)345 mLD)760 mLPage 1
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