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Yuliya22 [10]
3 years ago
11

If heat is released when water vapor what phase change Occurs

Chemistry
2 answers:
Ksenya-84 [330]3 years ago
6 0

Answer:

condensation

Explanation:

Heat is released when a vapour condenses.

Triss [41]3 years ago
3 0

Answer:

A chemical change

Explanation: It is turning into a gas so it wouldnt be a physical change

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Explain difference in melting points for the elements Na and Mg
Savatey [412]

Answer:

magnesium has a greater charge, there will be greater attraction between delocalised electrons and the positively charged ion.

Explanation:

I did this once and got it right I hope you get it right too

6 0
3 years ago
1. If a solution of sodium chloride has 22.3 g of
lina2011 [118]

<u>We are given:</u>

Mass of NaCl in the given solution = 22.3 grams

Volume of the given solution = 2 L

<u></u>

<u>Number of Moles of NaCl:</u>

We know that the number of moles = Given mass / Molar mass

Number of moles = 22.3 / 58.44 = 0.382 moles

<u></u>

<u>Molarity of NaCl in the Given solution:</u>

We know that Molarity of a solution = Moles of Solute / Volume of Solution(in L)

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7 0
3 years ago
Why is the number of electrons or charge of each ion useful information when predicting the products in replacement reactions?
olga nikolaevna [1]
In order to determine if the ion is positively charged or negatively charged
3 0
2 years ago
A sample of a solid labeled as NaCl may be impure. a student analyzes the sample and determines that it contains 75 percent chlo
Evgesh-ka [11]

Answer:

D

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The sample must contain impurity that is lower in atomic mass to sodium and since potassium has higher atomic mass to sodium, the answer is the sample contains NaCl and LiCl. We are sure already that the sample is not pure which rules out  option a and option b contains sodium iodide which cannot contribute to the increase in chlorine

5 0
3 years ago
Should Scientist be allowed to conduct stem cell research?
Citrus2011 [14]

Answer: Studying stem cells can help scientists understand more about how the body works and how disease develops and affects the body so yes

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7 0
3 years ago
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