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otez555 [7]
3 years ago
6

A sample of an ideal gas is cooled from 50.0°C to 25.0°C in a sealed container at constant volume.

Chemistry
1 answer:
ozzi3 years ago
3 0

Answer: Option (E) is the correct answer.

Explanation:

Since, it is given that the container is sealed one. So, no gas molecule is able to escape into the surrounding. Therefore, average molecular mass of the gas will remain the same.

Also, it is given that gas is cooled down from 50^{o}C to 25^{o}C. This means that there occurs a decrease in kinetic energy of the molecules of gas as kinetic energy is directly proportional to temperature.

Mathematically,      K.E \propto \frac{3}{2}kT

Hence, sped of molecules will decrease and molecules become closer to each other with decrease in temperature.

Thus, we can conclude that following values for the gas will decrease.

  • The average distance between the molecules.
  • The average speed of the molecules
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21.10g of NaOH and Ba3(OH)2 mixture is dissolved water to prepare 1.0dm³ Solution. To neutralize 25.OO mL of this solution needs
alex41 [277]

From the equation of te reaction, we know that the mass percent  of NaOH in the mixture is 1.4%.

<h3>What is neutralization?</h3>

Neutralization is a reaction that occurs between an acid and a base to yield salt and water only.

In tis case, the reaction of the NaOH and HCl occurs as follows; NaOH + HCl ----> NaCl + H2O

Number of moles of HCl reacted = 15/1000 * 0.5 moldm-³ = 0.0075 moles

Since the reaction is 1:1, 0.0075 moles of NaOH reacted.

Mass of NaOH =  0.0075 moles of NaOH * 40 g/mol = 0.3 g

Percent of NaOH = 0.3 g/21.10g * 100/1 = 1.4%

Learn more about percent concentration: brainly.com/question/202460

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1 year ago
e) Hydrogen gas is a non-metal and can be prepared in a laboratory Explain why hydrogen gas is collected over water.​
Luda [366]

Answer:

to collect pure hydrogen and avoid mixing with air

3 0
2 years ago
I need numbers 8 and 9. Thank you.
Sophie [7]

313.110 for number 8


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5 0
2 years ago
Which compound is composed of oppositely charged ions? A. SCl2 B. OF2 C. PH3 D. Li2O
netineya [11]

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D.

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If a compound is composed of oppositely charged ions, it has to be formed by metal and non-metal.

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2 years ago
Which pair of reactants will undergo aldol condensation to produce methylvinyl ketone?
xenn [34]

When formaldehyde and acetone then react with each other( aldol condensation) then it will be formed <u> methyl vinyl ketone.</u>

<u />

In organic chemistry, an aldol condensation would be a condensation reaction in which an enol and enolate ion combines with a carbonyl chemical to produce a -hydroxy aldehyde or -hydroxy ketone, that is then dehydrated to produce a conjugated enone.

In aldol condensation, when  formaldehyde and acetone then react with each other then it will be formed <u> </u><u>methyl vinyl ketone.</u>

It can be written as

CH_{2} O + CH_{3} COCH_{3} → HOCH_{2} -CH_{2} -CO-CH_{3}

When it will be heated then it gives methyl vinyl ketones.

HOCH_{2} -CH_{2} -CO-CH_{3} → CH_{2} =CH-CO-CH_{3}

So, the pair of reactants will be formaldehyde and acetone

To know more about aldol condensation

brainly.com/question/9415260

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1 year ago
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