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defon
3 years ago
8

What is a compound?

Chemistry
2 answers:
bulgar [2K]3 years ago
8 0

Answer:

D

Explanation:

Pure water is a compound made from two elements - hydrogen and oxygen. The ratio of hydrogen to oxygen in water is always 2:1. Each molecule of water contains two hydrogen atoms bonded to a single oxygen atom.

Anuta_ua [19.1K]3 years ago
7 0

Answer:

C.

Explanation:

A compound is a thing that is composed of two or more separate elements; a mixture. Which is described in option C

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What is the new concentration of a solution of CaSO3 if 10.0 mL of a 2.0 M CaSO3 solution is diluted to 100 ml?
kifflom [539]

Answer: The new concentration of a solution of CaSO_{3} is 0.2 M 10.0 mL of a 2.0 M CaSO_{3} solution is diluted to 100 mL.

Explanation:

Given: V_{1} = 10.0 mL,      M_{1} = 2.0 M

V_{2} = 100 mL,           M_{2} = ?

Formula used to calculate the new concentration is as follows.

M_{1}V_{1} = M_{2}V_{2}

Substitute the values into above formula as follows.

M_{1}V_{1} = M_{2}V_{2}\\10.0 mL \times 2.0 M = M_{2} \times 100 mL\\M_{2} = 0.2 M

Thus, we can conclude that the new concentration of a solution of CaSO_{3} is 0.2 M 10.0 mL of a 2.0 M CaSO_{3} solution is diluted to 100 mL.

5 0
2 years ago
The volume of a gas at 2.0 atm is 3.0 L. What is the volume of the gas at 1.5 atm at the same temperature?
pshichka [43]

Answer:

4 L

Explanation:

Ideal gas law is P1V1T2=P2V2T1

V2=P1V1/P2

T is not necessary to add since it is constant.

6 0
3 years ago
Which is a description of a niche?
iren2701 [21]

Answer:

B

Explanation:

Niche, in ecology, all of the interactions of a species with the other members of its community, including competition, predation, parasitism, and mutualism. A variety of abiotic factors, such as soil type and climate, also define a species’ niche.

4 0
2 years ago
Two atoms of the same element
kotykmax [81]

Answer:

Isotope

Explanation:

5 0
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Which weigh more 50mL of water or 50 mL of ice
LenKa [72]

Answer:

Water

Explanation:

5 0
2 years ago
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