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Mice21 [21]
3 years ago
14

Which substance would you most likely need to cool to the lowest temperature before it condenses?

Chemistry
2 answers:
melamori03 [73]3 years ago
5 0

the answer is: B. ethane (C2H6), a nonpolar covalent compound

Goryan [66]3 years ago
4 0
Schwarzschild Radius here.

So,

The real questions is "Which compound has the lowest boiling point?"  The answer would be the compound with the lowest intermolecular attractions.

Typically, the hierarchy of intermolecular attractions is as follows:

Ionic >> polar covalent > nonpolar covalent

Ionic compounds typically have very high boiling points, because melting them involves inputting enough energy to rip apart the positive and negative ions.  Sodium chloride, for example, has a boiling point of 1413°C.  So potassium bromide would probably have the highest boiling point.

Polar covalent compounds typically have boiling points closer to room temperature.  The most familiar polar covalent compound is water, with a boiling point of 100°C.  Ammonia is actually similar to water in that its primary intermolecular attraction is hydrogen bonding.

Nonpolar covalent compounds typically have the lowest boiling points.  Small alkanes/alkenes/alkynes have very low boiling points.  Their main intermolecular attraction is London dispersion forces, which are directly proportional to molecular mass, and thus are very weak in molecules such as methane, ethane/ethene, propane/propene, etc.  Thus, we can expect ethane to have the lowest boiling point.

Hope this helps!
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miss Akunina [59]
Wind isn’t an external force that acts in the rock cycle.
4 0
3 years ago
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What is the molar mass of just the O in CO2?
Vlad1618 [11]

Answer:

16 g/mol

Explanation:

In CO2, it means we have 1 mole of carbon and 2 moles of oxygen.

However, we want to find the molar mass of just a single mole of oxygen.

Now, from tables of values of elements in electronic configuration, the molar mass of oxygen is usually approximately 16 g/mol.

In essence the molar mass is simply the atomic mass in g/mol

8 0
3 years ago
What should i write on a essay about glue and liquid corn starch
PolarNik [594]
Hmm... interesting topic you're writing about here!
Well, for this essay, there must be specific criteria, correct? I'll make some suggestions, but of course you don't have to go by them if you don't like 'em. So... here they are!:

- List the physical and chemical properties of glue
- List the physical and chemical properties of liquid corn starch
- Compare and contrast the physical and chemical properties of glue with the physical and chemical properties of liquid corn starch
- You can conduct some experiments with the two substances also! You can mix the two together and see how they react with each other, and incorporate the results of the experiment into your essay.
- You can mix glue with some other liquid substances too, and incorporate your results into your essay. You can see whether each substance the glue mixes with creates a homogeneous or heterogeneous mixture, etc.
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That's all I can come up with at the moment. Maybe you'll take some of these suggestions into consideration...? Anyhow, I hope I helped somehow! :)
8 0
3 years ago
Solve the 3 questions
Dmitrij [34]

Answer:

what kind of math is this

Explanation:

5 0
2 years ago
A chemist wants to develop a fuel by converting water back to elemental hydrogen and oxygen using coupled ATP hydrolysis to driv
Doss [256]

Answer:

Firstly, we need know that:

Energy of a opposite reaction will equal to = (-) energy of forward reaction.

Therefore,

H2(g) +1/2 O2(g) -------------> H2O (g)    ΔfG = -237.13 kJ/mol -----------(1)

ATP + H2O (l) ................. ...........> ADP + Pi   ΔG = -31 kJ/mol   -----------(2)

The first equation can be written as:

H2O -------------------------> H2 +1/2 O2   ΔG = 237.13 kJ/mol -------------(3)

Equation (3) showed the formation of one mole of H2 gas required energy = 237.13 kJ/mol

Equation (2) showed that one mole of ATP on hydrolysis produces energy = 31.0 kJ/mol

Therefore, to get one mole of H2 gas means:

no of moles of ATP required = energy required for H2 production/energy produced by ATP  

= 237.13/31.00

= 7.65 moles

Therefore,  to produce one mole H2 gas = 7.65 moles of ATP is required

So in order to produce 3 moles of H2

= x ATP required for one mole

= 3 x 7.649

= 22.947 moles

Therefore, to produce three mole of H2 = 22.9 moles of ATP.

3 0
3 years ago
Read 2 more answers
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