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34kurt
4 years ago
12

How is Deposition a exothermic reaction?

Chemistry
1 answer:
nikdorinn [45]4 years ago
5 0
  <span>all the ones that phase down are exothermic - freezing, deposition, condensation. 

all the ones that phase up are endothermic - melting, sublimation, vaporization 

endothermic is to gain heat, exothermic is to release heat</span>
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Which equation demonstrates that nuclear fusion forms elements that are heavier than helium
yan [13]

Answer: The correct option is, 2.

Explanation:

Nuclear fission: It is defined as the reactions in which a larger unstable nuclei breaks into two or more smaller stable nuclei.

Nuclear fusion: It is defined as the reaction where two smaller nuclei combine together to form a larger nuclei.

Option 1 & option 2 shows fusion reaction and option 3 & option 4 shows fission reaction.

In option 1, helium itself is forming but in option 2, element is heavier than forming which is, neon.

Hence, the correct option is 2.

6 0
4 years ago
What example of matter is a mixture
Natalka [10]

Answer:

Most of the matter around us, however, consists of mixtures of pure substances. Air, wood, rocks and dirt are examples of such mixtures. Mixtures can be further classified as Homogeneous and Heterogeneous.

5 0
3 years ago
1. How to elements differ from compounds?
REY [17]

Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements contain only one type of atom.

Explanation:

5 0
4 years ago
An engine cylinder contains 175 mL of gas at a pressure of 1.0 atm. As the engine runs, it compresses the cylinder, reducing the
sukhopar [10]

This problem is providing the initial volume and pressure of a gas in an engine cylinder and asks for the final pressure once the volume of the gas has decreased due to a compression. At the end, the result turns out to be 11.7 atm.

<h3>Boyle's law</h3>

In chemistry, gas laws allow us to calculate pressure, volume, temperature or moles depending on a specified change and based on the concept and equation of the ideal gas, which derives the well-known gas laws; Boyle's, Charles', Gay-Lussac's and Avogadro's.

Thus, since this problem provides initial and final volume and initial pressure for us to calculate the final pressure, we understand we need to apply the Boyle's law as a directly proportional relationship between these two:

P_1V_1=P_2V_2

Thus, we solve for the final pressure, P2, to get:

P_2=\frac{P_1V_1}{V_2}=\frac{1.0atm*175mL}{15mL}\\ \\ P_2=11.7atm

Learn more about ideal gases: brainly.com/question/8711877

8 0
3 years ago
What method would you use to separate sand from gasoline?
WARRIOR [948]

Answer:

Filtration (The process of separating liquids and solids)

Explanation:

Filtration works best when the solute isn't dissolved in the solvent. Basically like how you can filter dirt or sand from water. The opposite of this would be if water and sugar where mixed together you cannot unmix this duo with filtration but with the example given you can use the process of filtration to rid the gasoline of sand.

8 0
3 years ago
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