Take Test: Chapter 8: HC × + course assessment id 132531 18ccourse id-_11449 1&c

Question

Take Test: Chapter 8: HC × + course assessment id 132531 18ccourse id-_11449 1&content; id particles? https//cowley What is the term for the amount of substance that contains 602 x 10 O Avogadro's number O formula mass O molar mass O mole O None of these QUESTION 12 Butyric acid is the odor of rancid cheese. Calculate the empirical formula for butyric acid given its percent composition: 54.53% C, 9.15% H, and 3632% O. O CHO CHO QUESTION 13 Click Save and Submit to save and stubmit. Cliok Save All Ansvers to save all answers Sa

Explanation / Answer

11)
1 mol contains 6.02*10^3 particles
Answer: mole

12)
we have mass of each elements as:
C: 54.53 g
H: 9.15 g
O: 36.32 g


Divide by molar mass to get number of moles of each:
C: 54.53/12.01 = 4.5404
H: 9.15/1.008 = 9.0774
O: 36.32/16.0 = 2.27


Divide by smallest to get simplest whole number ratio:
C: 4.5404/2.27 = 2
H: 9.0774/2.27 = 4
O: 2.27/2.27 = 1


So empirical formula is:C2H4O
Answer: C2H4O

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