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Ipatiy [6.2K]
3 years ago
11

Match each of Earth's spheres with its definition.

Chemistry
2 answers:
insens350 [35]3 years ago
7 0

Answer:

Thin layer of gases suspended in the air surrounding.

Explanation:

Atmosphere, mark me brainlist.

Margarita [4]3 years ago
3 0
I think it should be Atmosphere
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An atom with an atomic number of 18 will have how many electrons in its innermost orbit
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Answer:

2 electrons

Explanation:

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What is the mass of 0. 513 mol Al2O3? Give your answer to the correct number of significant figures. (Molar mass of Al2O3 = 102.
Margarita [4]

The mass of a 0.513 mol of Al2O3 is 52.33g.

HOW TO CALCULATE MASS:

The mass of a substance can be calculated by multiplying the molar mass of the substance by its number of moles. That is;

mass of Al2O3 = no. of moles of Al2O3 × molar mass of Al2O3

According to this question, there are 0.513 moles of Al2O3.

Mass of Al2O3 = 0.513 × 102

Mass of Al2O3 = 52.33g

Therefore, the mass of a 0.513 mol of Al2O3 is 52.33g.

Learn more about mass calculations at: brainly.com/question/8101390?referrer=searchResults

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2 years ago
What is scientific law how does a hypothesis become a law
malfutka [58]

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In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory. It is a misconception that theories turn into laws with enough research.

Explanation:

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MaRussiya [10]

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You need to count all the atoms on each side of the chemical equation. once you know how many of each type of atom you have,you can only change the coefficient. (the numbers in front of the atoms or compounds

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True or False <br>sound needs a medium to travel​
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True or T

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