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
lawyer [7]
3 years ago
5

When 4.979 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 16.20 grams of CO2 and 4.976 grams of H

2O were produced.
In a separate experiment, the molar mass of the compound was found to be 54.09 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon.
Chemistry
1 answer:
dimaraw [331]3 years ago
5 0
For Hydrocarbon combustion:

CₓHₐ + O₂ → xCO₂ + a/2 H₂O

Moles of CO₂ = 16.2 / 44 = 0.37
Moles of Carbon = 0.37
Moles of H₂O = 4.976 / 18 = 0.28
Moles of Hydrogen = 0.28 x 2 = 0.56

Molar ratio = C : H = 1 : 1.5
= 2 : 3
C₂H₃

Mass of empirical unit = 12 x 2 + 1 x 3
= 27
Mr = 54.09
Number of empirical units repeated: 54.09 / 27
= 2

Molecular formula = C₄H₆
You might be interested in
Suppose you begin with an unknown volume of 8.61 m h2so4 and add enough water to make 5.00*102 ml of a 1.75 m h2so4 solution. wh
olga55 [171]
<span>1.02x10^2 ml Since molarity is defined as moles per liter, the product of the molarity and volume will remain constant as mole solvent is added. So let's set up an equality to express this m0*v0 = m1*v1 where m0, v0 = molarity and volume of original solution m1, m1 = molarity and volume of final solution. Solve for v0, then substitute the known values and calculate: m0*v0 = m1*v1 v0 = (1.75 M * 500 ml)/8.61 M v0 = (1.75 M * 500 ml)/8.61 M V0 = 101.6260163 Rounding to 3 significant figures gives 102 ml. So the original volume of the 8.61 M H2SO4 solution was 102 ml or 1.02x10^2 ml.</span>
3 0
3 years ago
Identify the type of bonding, molecular geometry (shape), and intermolecular forces experienced by the compounds HF and HBr. Whi
Anestetic [448]
Im not sure but i think its hbr. i hope im right and i hope this helped,
8 0
3 years ago
Which of the following best describes exothermic chemical reactions?<br>​
zlopas [31]
They always release heat
3 0
3 years ago
In a vintage science fiction movie, space travelers find themselves on a planet orbiting a distant star in which there are curio
MA_775_DIABLO [31]

Answer:

has 4 electrons in its valence shell.

Explanation:

Silicon has 14 protons, so its neutral atom has also 14 electrons, thus, the electron distribution following the Linus Pauling's diagram is:

1s² 2s²2p⁶ 3s²3p²

Thus, it has 4 electrons in its valence shell (3), likely carbon. So, silicon would have some of the properties of carbon, such as form 4 bonds, and the structure would be similar.

5 0
3 years ago
What gas is released during cellular respiration?
alina1380 [7]
Carbon dioxide. <span>Cellular respiration is this process in which oxygen and glucose are used to create ATP, carbon dioxide, and water. ATP, carbon dioxide, and water are all products of this process because they are what is created. Carbon dioxide is released as a gas when you exhale.</span>
8 0
4 years ago
Read 2 more answers
Other questions:
  • Why does molecular polarity occur? ​
    7·1 answer
  • Why does water roll off of dry ice?
    11·1 answer
  • A salt is best described as a compound that is formed from the reaction between
    11·1 answer
  • In a 1 M solution of NH3(aq), identify the relative molar amounts of these species. Arrange them from most to least.
    14·1 answer
  • Does a melted iceberg increase the salinity of the ocean?
    8·2 answers
  • Read the given expression.
    6·1 answer
  • What is the concentration , in grams per liter , of a solution containing 6 mEq of calcium chloride ( CaCl2 ) per milliliter ? (
    10·1 answer
  • BRAINLIEST!!!!!!! PLEASE HELP!!!!!!!!!!!!!!
    5·1 answer
  • At which location would an object’s weight be the greatest?
    12·2 answers
  • What element is represented by the following orbital diagram?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!