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wolverine [178]
3 years ago
7

Choose the pure substance from the list below. Choose the pure substance from the list below.

Chemistry
1 answer:
Vesnalui [34]3 years ago
7 0

Answer:

carbon monoxide is a pure substance because it cannot be separated by any physical method.

Explanation:

A pure substance is also known as chemical substance, it is a form of matter having constant chemical composition and characteristic properties.

Also a pure substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.

A mixture of milk and water (tea) can be separated by filtration (physical method).

A mixture of of sugar and water can be separated by distillation (physical method).

Also a casserole, pomegranate juice are separated using physical methods.

However, carbon monoxide constant chemical composition and characteristic properties, and it cannot be separated by physical method.

Therefore, carbon monoxide is a pure substance.

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6. What causes the phases of the moon?
lawyer [7]

Answer:

The rotation of the Earth.

6 0
2 years ago
Will Florine react? will it combine with other elements?
Alexxx [7]

Fluorine is the most active chemical element, reacting with virtually every element. It even reacts with the noble gases at high temperatures and pressures. The noble gases, or Group 18 (VIIIA), also known as the inert gases, generally do not react with other elements.

Explanation:

5 0
3 years ago
Which of the following actions would cause the volume of the chamber below to increase to 36.0 L?
Orlov [11]

Answer:

Option C. Triple the number of moles

Explanation:

From the ideal gas equation:

PV = nRT

Where:

P is the pressure

V is the volume

n is the number of mole

R is the gas constant

T is the absolute temperature.

Making V the subject of the above equation, we have:

PV = nRT

Divide both side by P

V = nRT / P

Thus, we can say that the volume (V) is directly proportional to both the number of mole (n) and absolute temperature (T) and inversely proportional to the pressure (P). This implies that and increase in either the number of mole, the absolute temperature and a decrease in the presence will cause the volume to increase.

Thus, the correct option is option C triple the number of moles. This can further be seen as illustrated below:

Initial volume (V1) = 12 L

Initial mole (n1) = 0.5 mole

Final mole (n2) = triple the initial mole = 3 × 0.5 = 1.5 mole

Final volume (V2) =?

From:

V = nRT / P, keeping T and P constant, we have:

V1/n1 = V2/n2

12/0.5 = V2/1.5

24 = V2/1.5

Cross multiply

V2 = 24 × 1.5

V2 = 36 L.

Thus Option C gives the correct answer to the question.

5 0
3 years ago
Two substances, A and Z, are to be identified. Substance A can not be broken down by a chemical change. Substance Z can be broke
Kisachek [45]

Answer;

(3) Substance A is an element and substance Z is a compound.

Explanation;

-A compound is a substance formed when two or more chemical elements are chemically bonded together, such as water, carbon dioxide, methane, etc while an element is a pure chemical substance made of same type of atoms, such includes, oxygen, potassium, hydrogen, carbon, etc.

- Compounds can be broken down or decomposed into simpler substances: elements cannot be broken down chemically into simpler substances .

5 0
3 years ago
Read 2 more answers
Which atomic property is different in each isotope of an element?
slava [35]
Mass number...use da textbook bra
6 0
3 years ago
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