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Nana76 [90]
2 years ago
7

Why isn’t a state change from liquid to solid a chemical reaction?

Chemistry
2 answers:
kipiarov [429]2 years ago
4 0

Answer:

because the change can be undone with a chemical change the change cant be undone, and it just passes through another phase of matter. Changes of matter can consider physical

Explanation:

DanielleElmas [232]2 years ago
3 0

Answer:

nosé ehhhye eee p nosé inglés

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If I have 7.5 L of a gas in a piston at a pressure of 1.75 atm and compress the gas until its volume is 3.7 L, what will the new
Sergio [31]

Answer:

3.55atm

Explanation:

We will apply Boyle's law formula in solving this problem.

P1V1 = P2V2

And with values given in the question

P1=initial pressure of gas = 1.75atm

V1=initial volume of gas =7.5L

P2=final pressure of gas inside new piston in atm

V2=final volume of gas = 3.7L

We need to find the final pressure

From the equation, P1V1 = P2V2,

We make P2 subject

P2 = (P1V1) / V2

P2 = (1.75×7.5)/3.7

P2=3.55atm

Therefore, the new pressure inside the piston is 3.55atm

7 0
3 years ago
How many moles of mercury are equivalent to 3.46 x 1023 atoms?
olga55 [171]

Answer:

3.02 X1023 atoms Ag limol. - - 0.50 1 moles. 6.02241023 atoms.

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You have added IgG-sensitized red cells to the negative indirect antiglobulin test result of the antibody screen procedure. You
Ivanshal [37]

Answer:

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It means that the antibodies were present in the sample that react with the antigen present in the test tube.

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Wisdom teeth are the third and final set of human molars that come in during the late teens or early twenties. In some cases, th
Marina86 [1]
The answer is Vestigal.  It is a type of anatomical structure that no longer serves any function. Over time they are no longer needed in the body.  Apart from the wisdom tooth, another example would be the tail bone which has no use for humans.
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What is the mass of a 0.23 L substance, if it has density of 1.90 g/mL?
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Answer:

437 g

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as mass = density × volume

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