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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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The brightness of a star depends on its _____ a. color b. composition of atmosphere c. distance from Earth, and stars that are c
Yanka [14]

Answer:

Either B or C. Composition or the Distance from the Earth.

5 0
3 years ago
Chelsea went ice skating. The ice, her skates, the Zamboni, and the rink building were all examples of solids she encountered. S
inysia [295]

Answer:

Answers are C, D

Explanation:

Solid particles always stick together no matter what happens unless it is changing into a liquid. If you are talking about vibration for solid particles that only applies to thermal vibratio so not A. They do not slide past each other because they are packed very tightly together. They have a definite shape and volume because they stay together unless facing heat. Hopefully this helps you :)

pls mark brainlest ;)

4 0
3 years ago
What is the boiling point of a solution containing 203 g of ethylene glycol (C2H6O2) and 1035 g of water? (Kb for water is 0.52
Andru [333]

Answer:

101,37°C

Explanation:

Boiling point elevation is one of the colligative properties of matter. The formula is:

ΔT = kb×m <em>(1)</em>

Where:

ΔT is change in boiling point: (X-100°C) -X is the boiling point of the solution-

kb is ebulloscopic constant (0,52°C/m)

And m is molality of solution (mol of ethylene glycol / kg of solution). Moles of ethylene glycol (MW: 62,07g/mol):

203g × (1mol /62,07g) = <em>3,27moles of ethlyene glycol</em>

<em />

Molality is: 3,27moles of ethlyene glycol / (1,035kg + 0,203kg) = 2,64m

Replacing these values in (1):

X - 100°C = 0,52°C/m×2,64m

X - 100°C = 1,37°C

<em>X = 101,37°C</em>

<em></em>

I hope it helps!

7 0
3 years ago
What is the molar mass of (NH4)3 PO4? 113g, 121g, 149g, 339g
allochka39001 [22]
(NH4)3PO4 :

N = 14 * 3 =  42
H = 1 * 12 = 12
P = 31 * 1 = 31
O = 16 * 4 = 64
-------------------------
42+12+31+64 =  149 g / mol

Hope this helps!.


7 0
3 years ago
Classify the following compounds as ionic or covalent:. a.H2O. b.C6H12O6. c.CuBr2. d.KMnO4. e.C2H6. f.Fe(C2H3O2)3. . How do you
Papessa [141]
Ionic compounds are compounds composed of a metal as the cation (positive charge) and non-metals as anion (negative charge). Covalent compounds are composed of both non-metals. In this respect, a) water is covalent b) covalent c) ionic d) ionic e) covalent f) ionic. 
4 0
3 years ago
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