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
gulaghasi [49]
3 years ago
9

Which of the following substances has the highest melting point?

Chemistry
1 answer:
Aleksandr [31]3 years ago
5 0

Nonane (b) has the highest melting point.

-----------------------------

A caveat: I'm assuming that we're dealing with the straight-chain isomers of these alkanes (specifically pentane and nonane). The straight-chain isomer of pentane (<em>n</em>-pentane, CH3-[CH2]3-CH3) has a melting point of -129.8 °C; the straight-chain isomer of nonane (<em>n-</em>nonane, CH3-[CH2]7-CH3) has a melting point of -53.5 °C. The pattern holds as you go down (or up): The more carbon atoms, the higher the melting point. So, in decreasing order of melting points here, you'd have the following: nonane > pentane > butane > ethane.

However, one structural isomer of pentane, neopentane, has a melting point of -16.4 °C, which is <em>higher </em>that the melting point of <em>n</em>-nonane despite neopentane having the same molecular formula as its straight-chain isomer. Of course, you're not to blame for coming up with this question; this is just some extra info to keep in mind.

You might be interested in
Evidence of a chemical change would be
Elodia [21]
D- Rusting car fender
4 0
3 years ago
Read 2 more answers
Determine the volume of 12.3 grams of formaldehyde gas at STP?
postnew [5]
9.184 liters CH2O at STP

I think this is correct. Good luck
3 0
3 years ago
Read 2 more answers
Ap sublevel has 3 electrons. How should they be arranged
galina1969 [7]

Answer:

C.)One electron in each p orbital

Explanation:

In a P-sublevel with 3 electrons, they should be arranged with one electron going into each p-orbitals.

This is in accordance with the Hund's rule of maximum multiplicity.

The rule states that "electrons go into degenerate orbitals or sub-levels(p,d and f) singly before paring up".

Since the p-orbital is 3-fold degenerate with a capacity to accommodate a maximum number of 6 electrons, given 3 electrons, they will follow the Hund's rule in order to fill the orbitals.

So one electron will go in each p - orbitals easily.  

4 0
3 years ago
The ends of a bar magnet are called .. HELP ASAP!!!!!!!!!!!!!!1
LenaWriter [7]
<span>The ends of a bar magnet are called POLES</span>
5 0
4 years ago
Read 2 more answers
How many grams of hydrogen are produced when 125 g of iron reacts with 125 g of water?
Makovka662 [10]
13.89g hope this helps!
4 0
3 years ago
Other questions:
  • Giving out 56 points!<br> What's the top color of a rainbow?
    5·2 answers
  • What is the formula for this ionic compound and tha name ?
    15·1 answer
  • Fertilization takes place when
    12·2 answers
  • A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave
    8·1 answer
  • 1.<br> What is a chemical reaction?
    12·1 answer
  • How many atoms are in 9.95 moles of iron?
    10·1 answer
  • The picture shows a model of a cell.
    7·1 answer
  • What is the purpose of photosynthesis
    11·1 answer
  • Determine the concern traction in [M] of a solution that has an absorbance of 0.420
    6·1 answer
  • What happens to the particles in hot water when it cools down
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!