1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stells [14]
2 years ago
5

Compound C with molar mass 205gmol-1 , contains 3.758g of carbon , 0.316g of hydrogen and 1.251g of oxygen. Determine the molecu

lar formula.
Chemistry
1 answer:
labwork [276]2 years ago
8 0

Answer:

Molecular formula => C₁₂H₁₂O₃

Explanation:

From the question given above, the following data were obtained:

Molar mass of compound = 205gmol¯¹

Mass of Carbon (C) = 3.758 g

Mass of Hydrogen (H) = 0.316 g

Mass of Oxygen (O) = 1.251 g

Molecular formula =?

We'll begin by determining the empirical formula of the compound. This can be obtained as follow:

C = 3.758 g

H = 0.316 g

O = 1.251 g

Divide by their molar masses

C = 3.758 /12 = 0.313

H = 0.316 /1 = 0.316

O = 1.251 /16 = 0.078

Divide by the smallest.

C = 0.313 / 0.078 = 4

H = 0.316 / 0.078 = 4

O = 0.078 / 0.078 = 1

Thus, the empirical formula of the compound is C₄H₄O

Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:

Molar mass of compound = 205gmol¯¹

Empirical formula => C₄H₄O

Molecular formula =>?

[C₄H₄O]ₙ = 205

[(12×4) + (4×1) +16]n = 205

[48 + 4 +16]n = 205

68n = 205

Divide both side by n

n = 205 / 68

n = 3

Molecular formula => [C₄H₄O]ₙ

Molecular formula => [C₄H₄O]₃

Molecular formula => C₁₂H₁₂O₃

You might be interested in
Is ice melting in a drink a chemical change?
konstantin123 [22]
Nope, it's a physical change. When ice melts it changes into liquid water, it's still water. Changes in which no new substances are formed are physical changes, hence this is a physical change.
6 0
3 years ago
In a classical long run supply model the economy is always doing what
ch4aika [34]

Answer:

Economy is always at the full employment level of output

Explanation:

The economy in a classical long-run supply model will always have the same economic output

8 0
3 years ago
What are more than 5 abiotic things in the desert?
Anna71 [15]
Abiotic things are like rocks...dirt...water vs. biotic is living things or something that was living
7 0
3 years ago
Read 2 more answers
Please Help!!
Oksi-84 [34.3K]

Answer:

2K + Br2 --> 2KBr is the answer

4 0
3 years ago
Which of the following transports information from the eye to the brain?
Marina CMI [18]

Answer:

c

Explanation:

c is the correct answer

4 0
2 years ago
Other questions:
  • How are landforms and faults related
    11·1 answer
  • The insoluble salts below are put into 0.10 M hydrochloric acid solution. Do you expect their solubility to be more, less, or ab
    12·1 answer
  • Do convalent compounds conduct electricity
    11·1 answer
  • Examples of the skills used in science include _____ and _____.
    9·1 answer
  • Pls help me it detects if it’s right or wrong
    13·1 answer
  • A common oxidizing agent is..?
    5·1 answer
  • At 25◦C a 4 L sample of H2 exerts a pressure of 5 atm. What pressure would the same sample exert in a 2 L container at 25◦C?
    8·1 answer
  • which diver will experience more pressure: A scuba diver at 10 meters or one at 100 meters below at the surface of the water
    13·1 answer
  • How to convert °c 40 to °f
    15·1 answer
  • What would the potential of a standard hydrogen electrode (s. h. e. ) be under the given conditions? [h ]=0. 84 mh2=2. 2 atm=298
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!