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QveST [7]
4 years ago
5

Is dry ice subliming, endothermic or exothermic??

Chemistry
1 answer:
kaheart [24]4 years ago
5 0
Subliming is endothermic
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Use Boyle's Law to solve this problem: A gas has a volume of 10.0 L at a pressure of 4.0 atm. If the gas expands to 20.0 L, what
NARA [144]

Answer:

P₂ = 2 atm

Explanation:

Given data:

Initial volume = 10.0 L

Initial pressure = 4.0 atm

Final volume = 20.0 L

Final pressure = ?

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

4.0 atm × 10.0 L = P₂ × 20.0 L

P₂ = 40.0  atm. L/ 20.0 L

P₂ = 2 atm

7 0
3 years ago
Over a period of years, the average rainfall in an area has decreased, causing environmental changes. Most likely to survive the
zalisa [80]

ans D) with a great amount of genetic variation

3 0
3 years ago
Read 2 more answers
suppose a 22.092 g sample of 1 1 mixture of acetylferrocene and ferrocene was sepeerated by column chromatography and the recove
maksim [4K]

Answer:

Percentage recovery of acetylferrocene = 81.6%

Explanation:

Mass of the sample mixture = 22.092 g

Ratio of mixture of acetylferrocene and ferrocene = 1 : 1

This means that the sample conatains equal amounts of acetylferrocene and ferrocene.

Therefore the mass of each sample in the mixture = 22.092 g / 2 = 11.046 g

Mass of acetylferrocene recovered = 9.017 g

Percentage recovery of acetylferrocene = (mass of recovered/ mass in sample) * 100%

Percentage recovery of acetylferrocene = (9.017 g / 11.046 g) *100%

Percentage recovery of acetylferrocene = 81.6%

3 0
4 years ago
What are three common examples of nuclear energy?
Elena L [17]
1) <span> The fusion reaction (hydrogens form helium) in the Sun syplies our planet with all of the energy.
2) Nuclear bombs -</span><span>uncontrolled fission reaction creates mass destruction.
3) </span><span>Nuclear power plant - controlled fission reaction suplies homes with electric energy.
</span>Nuclear fission<span> is </span>nuclear reaction<span> in which the </span>nucleus<span> of an atom splits into smaller parts.</span>
5 0
3 years ago
What is the molarity of a solution containing 18.2 g of KCl in 215 mL of KCl solution?
bulgar [2K]

Answer:

The sum would be 69109.4944 ml if that's what you were asking

3 0
3 years ago
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