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masya89 [10]
4 years ago
8

Which of the following correctly describes a compound?

Chemistry
1 answer:
Nutka1998 [239]4 years ago
3 0

A compound is a pure substance formed by the chemical combination of two or more different elements.


A compound may be splitted into simpler substances by chemical reactions, and has different properties to those of the elements that form it.


The composition of a compound is fixed: every piece of a compound has the same kind of atoms, bonded in the same way and proportion.


Some examples of compounds are H₂O, NaCl, H₂O₂, CH₃COOH. As you see, they have a chemical formula which states the kind and number of the atoms that form them.


They are different to mixtures, which are formed by two or more compounds, in a variable proportion, and can be separated by physical media. Some examples of mixtures are the solutions (e.g. NaCl dissolved in H₂O), and some solid mixtures (e.g. a mixture of marbles and sand).

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7. The tendency of sound waves to bend when they pass from one medium to a different medium is known as A. refraction C. resonan
ahrayia [7]

The tendency of sound waves to bend when they pass from one medium to a different medium is known a refraction.

<h3>What is refraction ?</h3>

In diffraction, a sound wave is bent or stretched out in a single medium where the sound speed remains constant. Refraction is a crucial instance in which sound waves arc or diffuse. Due to variations in the wave's speed, a sound wave bends in this occurrence.

A wave bends as it travels along the edge of an object or through an aperture. It is referred to as diffraction. When a wave transitions from one medium to another at an angle, it also bends. It's known as refraction.

Thus, The option A is correct.

To learn more about refraction follow the link below;

brainly.com/question/2660868

#SPJ1

7 0
1 year ago
Wine goes bad soon after opening because the ethanol in it reacts with oxygen gas from the air to form water and acetic acid , t
ryzh [129]

The mass of ethanol is consumed by the reaction of 3.37g oxygen gas is 4.85g

Explanation:

The balanced equation for the chemical reactions is;

CH₃CH₂OH + O₂ → CH₃COOH + H₂O

The mole ratio between oxygen and ethanol in the reaction is 1 : 1

The molar mass of O₂ is 32g / mole. Therefore the O₂ moles consumes in the reaction is;

3.37 / 32

If the molar mass of ethanol is 46.07g/mole, and the ration of reaction in 1 : 1; Then the moles of ethanol consumed is;

3.37/32 * 46.07

= 4.85g

5 0
3 years ago
Below is a diagram of an atom. What is the atomic number of this atom?
Oksana_A [137]

Answer:

14

Explanation:

there are 14 electrons in the shells

8 0
3 years ago
 please  answer the last points i have
Reil [10]

i think it is the cell wall.

6 0
3 years ago
Which term is defined as the phase change from gas to solid?.
const2013 [10]

Answer:

deposition is the change from gas to solid

5 0
2 years ago
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