Question

1. The formula for Novocain, a local anesthetic is C13H21N2O2. What is the molar mass of this compound?

2. Putrescine is a compound that is partially responsible for the rotten smell of decaying flesh. It consists of 54.50% C, 13.73% H, and 31.77% N. What is the empirical formula of putrescine?

3. Calculate the molarity of a solution consisting of 60.0 g of NaOH in 1.50 L of solution.

Answer 1

SOLUTION 1. The given compound is ( 13 H₂, NO Molar mass of IBD + 21x1 + 2 x 14 + 2x16) g. (13 H₂, NO₂ = 237 g 2. Assuming a 100 g sample of given compound, to mass of carbon - 54.50 g . Moles of carbon = (54.50) moles = 4.54 moles 12 - 13.73 moles Mass of Hydrogen = 13.73 g i Moles of hydrogen = (13073) moles = 13. Mass of nitrogen - 31077 g . Moles of nitrogen = (3177) moles ² 2.27 moles The stoichiometric ratio of carbon, hydrogen and nitrogen is a COHON = 1654: 13.73 : 2.27 is - 2:6:1 u Emperical formula of putrescine (HN

3. Mass of NaOH(solute) 60.0 g & Moles of NaOH - (60.0 moles 40 - Volume of solution - 1.50 moles 1.50 L i to Molarity of the solution no of moles Volume of solution 1.50 1.00 M

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