Quinine, C_20H_24N_2O_2, is a component of tonic water and bitter lemon. a. How
ID: 501015 • Letter: Q
Question
Quinine, C_20H_24N_2O_2, is a component of tonic water and bitter lemon. a. How many moles of H are in 1.0 mole of quinine? b. How many moles of C are in 5.0 moles of quinine? c. How many moles of N are in 0.020 mole of quinine? Aluminum sulfate, Al_2(SO_4)_3, is used in some antiperspirants. a. How many moles of S are present in 3.0 moles of Al_2(SO_4)_3? b. How many moles of aluminum ions (Al^3+) are present in 0.40 mole of Al_2(SO_4)_3? c. How many moles of sulfate ions (SO_4^2-) are present in 1.5 moles of Al_2(SO_4)_3?Explanation / Answer
You can figure this question out by looking up quinine to find its chemical formula. The number of moles of hydrogen will be the number of hydrogen in the chemical formula. Once you see the chemical formula is C20H24N2O2 then you know that there are 24 moles of hydrogen for every one mole of quinine.
b) C20H24N2O2, 1 mole Quinine contains 20 moles of carbon 5.0 moles of Quinine contains 20*5.0 = 100 moles of carbon
c) C20H24N2O2,1 mole Quinine contains 2 moles of nitrogen 0.02 moles of Quinine contains 2*0.02 = 0.04 moles of nitrogen
7.8)
a) (3.0 mol Al2(SO4)3) x (3 mol S / 1 mol Al2(SO4)3) = 9 mol of S
b) (0.40 mol Al2(SO4)3) x (2 mol Al{3+} / 1 mol Al2(SO4)3) = 0.80 mol Al{3+}
c) (1.5 moles of Al2(SO4)3) x (3 mol SO4{2-} / 1 mol Al2(SO4)3) = 4.5 mol SO4{2-}