In chemistry, some changes are reversible and some are irreversible, explain.

1 answer:

8 0

The denaturing of proteins is irreversible. For example, eggs cannot be unboiled. Other reactions, such as the formation of carbonic acid, are reversible.

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If 29.4 mL of ethanol is dissolved in water to make 359 mL of solution, what is the concentration expressed in volume/volume % o

Sveta_85 [38]

Answer: $8.2\%$

Explanation:- Volume percentage is the ratio of volume of solute to the volume of solution defined in terms of percentage.

${\text {volume percentage}}=\frac{\text {volume of solute}}{\text {volume of solution}}\times 100\%$

Given: volume of solute = 29.4 ml

Volume of solution= 359 ml

${\text {volume percentage}=\frac{29.4}{359}\times 100\%=8.2\%$

6 0

4 years ago

If the bag was made from a metal (like sturdy aluminum foil), do you think it would lose its heat faster or slower than the plas

Luden [163]

I think it would lose its heat faster than the plastic bags because of higher conductivity feature.

<h3>What is conduction?</h3>

Conduction is the process in which heat or electricity is transmitted or transferred through the material of a substance without movement of the material.

We know that metals are good conductors so we can conclude that it would lose its heat faster than the plastic bags bof higher conductivity feature.

Learn more about heat here: brainly.com/question/13439286

5 0

2 years ago

Period # for hydrogen

lesya [120]

pretty positive the answer is 1

3 0

4 years ago

Read 2 more answers

You are analyzing a solid isolated from a reaction and find that its boiling point is over 1000 ∘ C . You dissolve the compound

babymother [125]

Answer:

Sodium iodide NaI

Magnesium chloride MgCl₂

Explanation:

Silicon dioxide SiO₂ it is not soluble in water, so it can not be recrystallized from water, it is a white solid and the boiling point is 2230 °C. This one is not the unknown solid.

Sodium iodide NaI it is soluble in water, it has a white color and the boiling point is 1304 °C . This can be the unknown solid.

Magnesium chloride MgCl₂ is soluble in water, it have a white color and the boiling point is 1,412 °C . This can be the unknown solid.

Phosphorus tribromide PBr₃ is will start a hydrolysis reaction in water, it is a colorless liquid and it has a boiling point of 173 °C. This one is not the unknown solid.

5 0

3 years ago

Help me please( ╹▽╹ )

xeze [42]

Lower temperature

Let's verify