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3 years ago

As the pressure on the surface of a liquid decreases, the temperature at which the liquid will boil

Chemistry

2 answers:

enot [183]3 years ago

8 0

Increases with pressure

kap26 [50]3 years ago

3 0

Increases, boiling point, and vapor pressure are inversely proportional to each other.

think of this, water boils at a lower temperature at high altitude, like on the mountains because the atmospheric pressure there is lower.

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4 years ago

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4 years ago

Which set of work should be used to solve the following problem?

VladimirAG [237]

Answer:

C. 65.5 g PF3 x (1 mole / 87.97 g PF3)

Explanation:

Dimensional analysis can be used to find the amount of moles in 65.5 grams of PF3 gas.

First we would need to determine relevant conversions.

We would need to find the molar mass of PF3 which is already given ( 87.97 g / mol )

So 1 mole of PF3 = 87.97g

From there we can create the dimensional analysis table which will look something like the attached image.

This table correspond with answer choice C.

Reasons it's not the other answer choices.

It wouldn't be A because the units must cancel out and they don't as grams is being multiplied by grams

It would be B because it doesn't use correct units.

There are not 87.97 moles in 1 gram of PF3. There are 87.97 grams in 1 mole of PF3

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2 years ago