CHEMISTRY HIGH SCHOOL

Which statement describes a chemical property that can be used to distinguish between compound A and compound B?(1) A is a blue solid, and B is a white solid.
(2) A has a high melting point, and B has a low melting point.
(3) A dissolves in water, and B does not dissolve in water.
(4) A does not burn in air, and B does burn in air.

Answers

Answer 1
Answer: (4) A does not burn in air, and B does burn in air is your answer. Flammability is a chemical property while the rest of these are physical properties.
Answer 2
Answer:

Final answer:

The correct option is 4.

The ability of a compound to burn in air is a chemical property and can be used to distinguish between two compounds.

Explanation:

The statement that describes a chemical property which can be used to distinguish between compound A and compound B is: (4) A does not burn in air, and B does burn in air. Physical properties like color, melting point, and solubility (options 1, 2, and 3) are characteristics that can be observed without changing the substance into another substance. On the other hand, a chemical property describes how a substance interacts with other substances, including its flammability. Therefore, the ability or inability of a compound to burn in air would be a chemical property.

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Ionic compounds produce ions in solution by

Answers

Ionic compounds either dissociate or dissolve in a solution to produce ions.  
I hope this helps.  Let me know if anything is unclear.

A lawnmower runs on gasoline.what type of energy transformation takes place in its engine?

Answers

It would be chemical energy?

What is most likely true about ocean temperatures surrounding Australia, which is marked by the star in the following map?Map showing the Ocean Conveyor belt. A cold current runs west to east, south of Australia. The current then reverses course in the Pacific Ocean, so that a warm current flows east to west, north of Australia.

Public Domain

A. The ocean temperatures north of Australia are lower than the ocean temperatures south of Australia
B. The ocean temperatures north of Australia are higher than the ocean temperatures south of Australia
C. The ocean temperatures north of Australia are the same as the ocean temperatures south of Australia.
D. The ocean temperatures north of Australia are sometimes higher and sometimes lower than the ocean temperatures south of Australia.

Answers

The answer that is most likely true about ocean temperatures surrounding Australia, which is marked by the star in the following map is that b) the ocean temperatures north of Australia are higher than the ocean temperatures south of Australia. 

Answer:

B. The ocean temperatures north of Australia are higher than the ocean temperatures south of Australia

Explanation:

When sodium metal is added to water, an orange flame is observed on the metal surface. Based on this observation, what can best be concluded

Answers

Answer:

the answer i belive is c

Explanation:

A chemical reaction occurs because heat and light are given off.

Explanation:

A property which causes change in chemical composition of a substance is known as a chemical property. For example, reactivity, toxicity, combustion etc.

Whereas a property which causes no change in chemical composition of a substance is known as a physical property. For example, mass, volume, density etc.

Sodium is a very reactive metal and it reacts readily with oxygen, water etc. So, when sodium is added to water then occurrence of an orange flame represents its reactivity.

Thus, based on given observation it can be concluded that chemical reaction takes place when sodium is added to water.

Container A contains 10.0 g of liquid isopropyl alcohol which has a latent heat of vaporization of 732 J/g. Container B contains 10.0 g of liquid ethanol which has a latent heat of vaporization of 841 J/g. Both containers are brought to their respective freezing points. Heat is then removed from both containers at the same rate. The container whose contents will freeze first is:

Answers

By definition, the latent heat associated with melting a solid or freezing a liquid is called the heat of fusion.

Container A has a latent heat of vaporization of 732 J/g.
Container B has a latent heat of vaporization of 841 J/g.

Latent heat of vaporization refers to the vaporizing a liquid or a solid or condensing a vapour.

This means that Container A boils first because it has lower latent heat of vaporization. 

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Answers

plate tectonics within the earth are constantly shifting, and every once in a while the plates collide with one another, causing earthquakes.
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