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3 years ago

If a substance changes its shape and size, is it a physical or chemical change? - chemical - physical - both

Chemistry

1 answer:

Alex3 years ago

4 0

Physical. chemical only applies when it undergoes a reaction

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Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you t

Lelu [443]

Answer:

Sample A - mixture

Sample B- Mixture

Explanation:

Looking at sample A, we can see that as water was poured over sample A, the sample was separated into its components as the powder disappeared leaving behind a gritty black sand-like material on the surface of the paper. A separation of the mixture has taken place.

In sample B, we can clearly see that it is a mixture because the amount of solid recovered is much less than the total mass of the solid put into the beaker. The sample must have been separated into its components.

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2 years ago

Which class of organic compound is most likely to be used in anesthetics?

lubasha [3.4K]

The class of organic compound is most likely to be used in anesthetics is ethers. The first ether that is used in anesthetics is diethyl ether .

In general anesthetic works on brain, and produce unconsciousness and insensitivity to feel pain or anything. Generally it lowers the sensitivity of the organs. Diethyl ether is the first ether that is used as anesthetics.

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3 years ago

Read 2 more answers

Three blocks are shown: Three blocks are shown. Block A has mass 3 kilograms, length 6 centimeters, height 4 centimeters, and wi

dsp73

Answer:

Block A has the greatest density.

Explanation:

Three blocks are shown: Three blocks are shown.

Block A has mass 3 kilograms, length 6 centimeters, height 4 centimeters, and width 2 centimeters.

Block B has mass 1 kilograms, length 6 centimeters, height 2 centimeters, and width 4 centimeters.

Block C has mass 2 kilograms, length 2 centimeters, height 6 centimeters, and width 4 centimeters.

Which statement is correct?

- Block A has the greatest density.

- Block B has the greatest density.

- The density of Block A is equal to the density of Block B.

- The density of Block B is equal to the density of Block C

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1 year ago

What happens to that atom of magnesium-24 if it GAINS a NEUTRON? *

kipiarov [429]

Answer: If this atom loses one electron, it will become a cation with a 1+ charge

Explanation:

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3 years ago

A. 24.5 g of ammonia NH3 = how many moles of ammonia?

Art [367]

23.9 11.00 would be the wrong answer because I guessed

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2 years ago