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
jekas [21]
3 years ago
8

Find the amount in kJ of heat exchanged by the combustion of 61.9 g of ethane (C2H6(8) given that the molar enthalpy of combusti

on of ethane is -1,451 kJ/mol. 3
or more sig figs
Chemistry
1 answer:
elena-14-01-66 [18.8K]3 years ago
8 0

Answer:

2994 kJ

Explanation:

When one mol of ethane (C₂H₆) is combusted, 1451 kJ of heat is exchanged.

First we convert 61.9 g of C₂H₆ into moles, using its molar mass:

  • 61.9 g ÷ 30 g/mol = 2.06 mol C₂H₆

Finally we <u>calculate how much heat is exchanged by the combustion of 2.06 moles of C₂H₆</u>:

  • 2.06 mol * 1451 kJ/mol = 2994 kJ
You might be interested in
(0904) How many atoms are there in 56.2 grams of Krypton, Kr?
Luba_88 [7]

Answer:

56.2÷6.02×10^23

=9.34×10^23

Explanation:

Divide the given mass of the atom by the mass of an Atom (the avogadro's constant) to find the number of atoms in the given mass.

8 0
3 years ago
How many total atoms are in C3H-NO3?
Alik [6]

Answer:

Percent composition by element

Element Symbol # of Atoms

Hydrogen H 5

Carbon C 3

Nitrogen N 3

Oxygen O 9

5 0
3 years ago
Elaborate on the difference in natural occurrences between fission and fusion reactions. A) Neither fission nor fusion reactions
vazorg [7]
<span>Okay then I would go with choice B since fusion takes place in the sun which is a giant star.</span>
8 0
3 years ago
Read 2 more answers
The solubility of potassium chloride is 34 g KCl
kenny6666 [7]

Answer: When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:, unsaturated

At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?, 60 ºC

Explanation:

8 0
3 years ago
What's the principle of Atomic emission spectroscopy?
slega [8]

Answer:

Explanation:

The theory or working principle of Atomic Emission Spectroscopy involves the examination of the wavelengths of photons discharged by atoms and molecules as they transit from a high energy state to a low energy state. A characteristic set of wavelengths is emitted by each element or substance which depends on its electronic structure.

4 0
3 years ago
Other questions:
  • Solution A has a concentration of 3 M. If solution B is 5 times more concentrated than A what is it’s concentration?
    15·1 answer
  • 1. Describe potential long-term and short-term effects of exposure to chemicals.
    13·1 answer
  • Why does the high pressure air being released into the ballast tanks of a submarine cause it to rise quickly?
    13·1 answer
  • Which term names a metamorphic change in rocks over a wide area from tectonic forces in Earth's crust and mantle? A. local metam
    8·2 answers
  • Alguien sabe algo de introducción ala fisica ?​
    15·1 answer
  • What occurs as two atoms of fluorine combine to become a molecule of fluorine?
    11·2 answers
  • Is tillite a mineral or a rock
    15·1 answer
  • What is mixture of noodles in a bowl​
    5·1 answer
  • A force of 10 N pulls an object to the right, and a force of 7 N pulls to the left, what is the net force
    13·1 answer
  • This is my question in imageIf 16.0 grams of aluminum oxide were actually produced, what is the percent yield of the reaction be
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!