the bitter tasting c ompound quinine is a component of tonicwater and is used as
ID: 685628 • Letter: T
Question
the bitter tasting c ompound quinine is a component of tonicwater and is used as a protection against malaria. it contains onlyC, H, N and O. when a sample of mass 0.487 g was burned, 1.321 g ofcarbon dioxide, 0.325 g of water and 0.0421 g of nitrogenwere produced. the molar mass of quinine is 324 g/mol. determinethe Empirical and Molecular Formula for quinine. can someone please do it? thank you. the bitter tasting c ompound quinine is a component of tonicwater and is used as a protection against malaria. it contains onlyC, H, N and O. when a sample of mass 0.487 g was burned, 1.321 g ofcarbon dioxide, 0.325 g of water and 0.0421 g of nitrogenwere produced. the molar mass of quinine is 324 g/mol. determinethe Empirical and Molecular Formula for quinine. can someone please do it? thank you.Explanation / Answer
1.321 g CO2 * ( 1mol CO2/ 44 g CO2) *( 12 g C / 1mol CO2) =0.360272727 g C 0.325 g H2O * ( 1mol H2O/ 18 g H2O) *( 2 g H/ 1mol H2O) =0.0361111111 g H 0.0421 g N2 total mass = 0.3603 + 0.0361 + 0.0421 = 0.4385 g mass oxygen = 0.487 g - 0.4385 g = 0.0485 g O moles C = 0.36027 g C *(1mol / 12 g) = 0.0300225 molC moles H = 0.03611 g H *( 1mol / 1 g) = 0.03611 mol H moles N = (0.0421 g N *( 1mol / 14 g) = 0.00300714286 mol N moles O = (0.0485 g O * ( 1mol/ 16 g)) = 0.00303125 mol O Divide all by 0.003007 mol => 0.0300225 mol C / 0.003007 = 9.98420353 ~ 10 mol C => 0.03611 mol H / 0.003007 = 12.0086465 ~ 12 mol H => 0.03007 mol N/ 0.003007 = 1 mol N => 0.0303125 mol O / 0.0303125 ~ 1 mol O => Empirical formula C10H12NO formula weight = 10*12 + 12*1 + 1*14 + 1*16 = 162 g/mol => 324/162 = 2 => molecular formulaC20H24N2O2
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