Which of the following is not an example of a chemical change?

Chemistry

2 answers:

elena55 [62]3 years ago

5 0

This would be C. A car rusting

nekit [7.7K]3 years ago

4 0

Food digesting- because you are breaking down the food particles.

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What is the meaning of "Laser"

iVinArrow [24]

A device that generates an intense beam of coherent monochromatic light (or other electromagnetic radiation) by stimulated emission of photons from excited atoms or molecules. Lasers are used in drilling and cutting, alignment and guidance, and in surgery; the optical properties are exploited in holography, reading bar codes, and in recording and playing compact discs.

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2 years ago

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The exchange rate for one United States dollar (US$1.00) is two dollars and seventy cents in Eastern Caribbean currency (EC$2.70

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Answer:

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2 years ago

What’s 124.683 as a 1 significant digit number

AVprozaik [17]

Answer:- 100

Explanations:- The given number is 124.683 and it has 6 significant figures. We are asked to round it to one significant digit number. To round it as one significant digit we need to make two second and third digits zero and all the three digits next to the decimal are dropped since we want only one significant digit. Second and third digits left to the decimal could not be dropped as they hold the place values. So, 124.683 is round to 100 that has just one significant digit.

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2 years ago

Identify which statement about a solution is correct. Group of answer choices The solution has the same physical state as the ph

zavuch27 [327]

Water can only be the solvent, never the solute is the statement about a solution that is correct.

The solute is the substance that, in general, is found in less quantity and that dissolves in the mixture.

The solvent, on the other hand, is the substance that usually appears in greater quantity and where the solute dissolves.

The most usual thing is that the solvent is the substance that establishes the physical state of the solution.

Water is considered a universal solvent, since it is the liquid that dissolves the most substances, a quality linked to its status as a “polar molecule”, this is due to its ability to form hydrogen bonds with other substances.

Solubility depends on the properties of a solvent that allow it to interact with a solute in a stronger way than the solvent particles do with each other.

In particular, the polar character of water makes it an excellent solvent for polar and ionic solutes, which are called hydrophilic.

Therefore, we can conclude that water can only be the solvent, never the solute is the statement about a solution that is correct.

Learn more here: brainly.com/question/2835889

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2 years ago

The density of potassium, which has the BCC structure, is 0.855 g/cm3. The atomic weight of potassium is 39.09 g/mol. Calculate

Delicious77 [7]

Answer:

For a: The edge length of the crystal is 533.5 pm

For b: The atomic radius of potassium is 231.01 pm

Explanation: