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3 years ago

Which liquid substance would evaporate most quickly in the open air at 20°C? Explain our answer

Chemistry

1 answer:

kati45 [8]3 years ago

3 0

Answer:

mp -5; bp 30

Explanation:

That will be a liquid at room temperature, and it will evaporate quite quickly. Room temperature is generally considered 20 degrees Celsius. Choice B melts from a solid to a liquid at -5 degrees, so it's a liquid at room temperature as long as the boiling point is higher than 20 degrees.

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Answer truthfully:))

Elina [12.6K]

Answer:

<u>Formula</u><u>:</u> $Velocity \: V = f \lambda \\ Solution: = 5 \times 0.8 \\ = 4 \: {ms}^{ - 1}$

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3 years ago

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Cola contains phosphoric acid and carbonic acid. Which is the most likely reason that cola also contains a large amount of sugar

Bumek [7]

Answer:

B. to counteract the sourness of the acids

Explanation:

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3 years ago

1 C3H8 + 5 O2 --> 3 CO2 + 4H20. If 1.5 moles of C3H8 react, how many

UNO [17]

Answer:

First confirm the reaction is balanced:

C3H8 + 5O2 --> 3CO2 + 4H20 (3 cabon - check; 8 hydrogen - check; 10 oxygen - check).

a) In the equation there is a 5:1 ratio between propane and oxygen. We also know that number of mole is proportional to pressure and volume. Since pressure is constant (STP) then the volume of O2 is 7.2 * 5 = 36 litres.

b) For a near ideal gas that PV = nRT (combined gas law). So for 7.2 litres propane we find n(propane) = 101.3 * 7.2/8.314*298 ~ 0.29 mole (using metric units throughout for simplicity).

There is a 1:3 ratio between propane and CO2. Therefore 3 * 0.29 = 0.87 mole of CO2 is produced.

MW(CO2) ~ 44 g/mol. Therefore m(CO2) = 44 * 0.87 ~ 38.3 g

c) We know we need more oxygen than propane (due to the 1:5 ratio) so oxygen is the limiting reagent. Again Volume is proportional to number of mole and we see there is a 5:4 ratio between oxygen and water. Therefore the volume of water vapour produced will be (4/5) * 15 = 12 litres.

The other questions use the same technique and will give you some much needed practice.

Explanation:

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4 years ago

The part that includes land and water

luda_lava [24]

Answer: this is all of it

Explanation: i know this because its all of it

6 0

3 years ago

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How many grams of hcl can dissolve in 200 g of water at 60 c?

Eddi Din [679]

The solubility curve is a plot of solubility against temperature.

<h3>What is solubility?</h3>

The term solubility refers to the amount of substance that dissolves in solution at a given temperature. Hence, the solubility curve is a plot of solubility against temperature.

Thus, from the solubility curve (not shown) the amount if HCl dissolved can be obtained hence the question is incomplete.

Learn more about solubility:brainly.com/question/8591226

#SPJ1

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2 years ago