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2 years ago

Methane is a gas at room temperature and pressure. Explain why this is the case.

2 answers:

7 0

Methane has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.

Sveta_85 [38]2 years ago

4 0

Answer:

hope it helps ❤

Explanation:

Methane only has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.

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Intermolecular forces dipole differences london dispersion

loris [4]

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2 years ago

How many moles of sodium hydroxide are contained in 65.0 mL of a 2.20 M solution?

taurus [48]

2.20 M means there are 2,20 mol of NaOH in 1 000 mL of solution. We can use this proportion as a conversion factor:

$65\ mL\cdot \frac{2.20\ mol}{1\ 000\ mL} = \bf 0.143\ mol$

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3 years ago

The vapor pressure of pure pentane and pure hexane are 425 torr and 151 torr respectively. equal moles of pentane and hexane are

nadezda [96]

The mole fraction of pentane in the vapor is 0.291

Vapour pressure rises with temperature and is a measurement of a substance's propensity to transform into a gaseous or vapour state. The boiling point of a liquid is the temperature at which the pressure exerted by its surroundings equals the vapour pressure present at the liquid's surface.

The number of moles of a particular component in the solution divided by the overall number of moles in the sample solution is known as the mole fraction.

Using the formula for vapour pressure,

vapour pressure = $P^{}$ ° $_{hex}$ × $X_{hex}$ + $P^{}$ ° $_{pen}$ × $X_{pen}$

vapour pressure = 151 × $(1-$ $X_{pen}$ $)$ + 425 × $X_{pen}$

240 = 151 - 151 $X_{pen}$ + 425 $X_{pen}$

240 - 151 = - 151 $X_{pen}$ + 425 $X_{pen}$

89 = 274 $X_{pen}$

$\frac{89}{274}$ = $X_{pen}$

0.291 = $X_{pen}$

Therefore, the mole fraction of pentane in the vapor is 0.291

Learn more about vapour pressure here;

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3 0

1 year ago

Please Help . Thank You Very Much

KatRina [158]

Transverse can travel through solids(but not liquids and gas) and longitude can travel through any matter.

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2 years ago

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the soun

Shtirlitz [24]

Answer:

Yes, I would be able to hear the speaker clearly because the supposedly dropping off of sound as the distance gets farther is counteracted by "reverberations" inside the auditorium.

Explanation:

According to the "Inverse Square Law," if the distance from the sound source is doubled, the intensity of the sound will diminish by 6 decibels. This is true if the situation is in a "free field," which means the sound has no reflection.

However, this is not the case in an "auditorium." An auditorium causes the "reverberation" of sound. This prolongs the resonance of the sound. So, this means that even if the sound drops off by a factor of 100 (20 decibels), due to reverberations, the height of the ceiling, the kind of wall and materials used in making the seats also affect the intensity of the sound waves. This is the reason why auditoriums are used as venues for concerts, presentations and the like where a large group of people serve as the audience.

4 0

3 years ago

Read 2 more answers