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SCORPION-xisa [38]
2 years ago
7

What could you do to increase the volume of the gas in a jar?

Chemistry
2 answers:
Leona [35]2 years ago
5 0

An increase in the number of gas molecules in the same volume container increases pressure.

A decrease in container volume increases gas pressure.

An increase in temperature of a gas in a rigid container increases the pressure.

beks73 [17]2 years ago
4 0

Decrease the pressure

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a solution of unknown molecular substance is prepared by dissolving 0.50g of the unknown in 8.0g of benzene. the solution freeze
spayn [35]

Answer:

THE MOLAR MASS OF THE UNKNOWN MOLECULAR SUBSTANCE IS 200 G/MOL.

Explanation:

Mass of the unknown substance = 0.50 g

Freezing point of the solution = 3.9 °C

Freezing point of pure benzene = 5.5 °C

Freezing point dissociation constant Kf = 5.12°C/m

First, calculate the temperature difference between the freezing point of pure benzene and the final solution freezing point.

Change in temperature = 5.5 -3.9 = 1.6 °C

Next is to calculate the number of moles or molarity of the compound that dissolved.

Using the formula:

Δt = i Kf m

Assume i = 1

So,

1.6 °C = 1 * 5.12 * x/ 0.005 kg of benzene

x = 1.6 * 0.008 / 5.12

x = 0.0128 / 5.12

x = 0.0025 moles.

Next is to calculate the molar mass using the formula, molarity = mass / molar mass

Molar mass = mass / molarity

Molar mass = 0.50 g /0.0025

Molar mass = 200 g/mol

Hence, the molar mass of the unknown compound is 200 g/mol

6 0
3 years ago
Question 2 of 5
alex41 [277]
Precision relates to how close the answers are to each other, so I’d think it would be D because of the limited range between data points.
7 0
3 years ago
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Where do Alkanes come from​
bagirrra123 [75]

Answer:

Alkanes naturally occur in crude oil and are a major component of many fuels and solvents derived from petroleum

3 0
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How many covalent bonds are in a nitrogen molecule?
makvit [3.9K]
3 covalent bonds (there are 2 electrons in the first orbital and 5 in the second. You still have room for three more)
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How to convert 2750 mg to g?
choli [55]

Answer:

2.75 g

Explanation:

divide 2750 by 1000

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3 years ago
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