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igomit [66]
3 years ago
6

Which processes represent one chemical change and one physical change

Chemistry
1 answer:
Effectus [21]3 years ago
6 0
- freezing and melting

- freezing and vaporization

- decomposition and melting

- decomposition and combustion

PLEASE RATE AS THE BRAINLIEST ANSWER! THANK YOU! :)


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Does spring and Fall exist at the poles?
seropon [69]

Answer:

Yes

Explanation:

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3 years ago
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The molecular weight of a gas that has a density of 5.75 g/l at stp is __________ g/mol.
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Answer : The molecular weight of a gas is, 128.9 g/mole

Explanation : Given,

Density of a gas = 5.75 g/L

First we have to calculate the moles of gas.

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So, 1 liter volume of gas present in \frac{1}{22.4}=0.0446 mole of gas

Now we have to calculate the molecular weight of a gas.

Formula used :

\text{Moles of gas}=\frac{\text{Mass of a gas}}{\text{Molecular weight of a gas}}

Now put all the given values in this formula, we get the molecular weight of a gas.

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3 years ago
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<span>More surface area --> more molecules of the solute in contact with the solvent --> more chance for a solvent molecule to collide with the solute molecules --> dissolves faster

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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Explanation: Plz make brainliest

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