Question

Part 1:

You obtain an organic compound that contains C, H, N, and O and determine the percent composition of each element. You determine that the sample is 34.91% carbon, 6.83% hydrogen, 27.26% nitrogen, and 31.00% oxygen, each by mass. We will make the assumption that the percent listed is the same as the mass in grams, if the total mass is 100 grams.

a) Using this assumption, determine the moles of each element. After, add up the moles of each element and enter your answer below.

b) Now, divide all substances by the number of moles of the element with the SMALLEST number of moles. Add up all these values, and enter the number below.

c) Round the numbers obtained in part 3 to either whole numbers or decimals that represent common fractions (such as 0.5 for 1/2, 0.33 for 1/3, 0.66 for 2/3, 0.25 for 1/4, 0.75 for 3/4, etc). Now, multiply the numbers by a factor until they are all whole. Sum up the resulting numbers and enter your sum below (your answer should be a whole number).

d) The above result represents the empirical formula, or the formula with the lowest whole number ratios of each element. Determine the molar mass of the empirical formula, and enter the value below

e) The molar mass of the compound is 206.44. If necessary, multiply the empirical formula by some whole number in order to match this molecular mass. Then, sum up the subscripts of all elements and enter your number below (if necessary, include any implied one's). Your answer should be a whole number.

Answer 1