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18 votes
HELP

Determine the empirical formula of a compound containing 48.38
grams of carbon, 6.74 grams of hydrogen, and 53.5 grams of oxygen.
In an experiment, the molar mass of the compound was determined to be 180.15 g/mol.
What is the molecular formula of the compound?
For both questions, show your work or explain how you determined the formulas by
giving specific values used in calculations.

User Gaynelle
by
2.6k points

2 Answers

15 votes
15 votes

my teacher hasnt graded yet, but i got the same answer as the guy above. i did my best to explain the process for y'all if you genuinely don't understand/know how to do it. THE PROCESS IS VERY LONG, but youll get it eventually if i didnt help lol GOODLUCK

and yes, the molecular formula is C6H12O6

HELP Determine the empirical formula of a compound containing 48.38 grams of carbon-example-1
HELP Determine the empirical formula of a compound containing 48.38 grams of carbon-example-2
HELP Determine the empirical formula of a compound containing 48.38 grams of carbon-example-3
User Ahmet Emrebas
by
3.1k points
20 votes
20 votes

Answer:

I recently answered this question. The response I submitted is included below. I beleive my answer should be correct.

Step-by-step explanation:

Question 1:

C: 48.38g(1mol/12g) = 4.0317

H: 8.12g(1mol/1.01g) = 8.12

O: 53.5g(1mol/16g) = 3.34375

Divide by the smallest amount (3.34375)

C = 4.0317/3.34375 = 1.206 = 1

H = 8.12/3.34375 = 2.42 = 2

O = 3.34375/3.34375 = 1

Empirical formula = CH2O

Question 2:

Molecular formula = n(empirical formula)

n = molar mass (compound)/molar mass (empirical)

Empirical formula: CH2O

Molar mass of CH2O = 12 + 2x1 + 16 = 30 g/mol

Molar mass of compound: 180.15 g/mol


n = (180.15g/mol)/(30g/mol) = 6

Molecular formula = C6H12O6

User Tkers
by
2.9k points