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nydimaria [60]
3 years ago
15

What were the four elements that ancient Greeks believed to exist

Chemistry
1 answer:
ruslelena [56]3 years ago
4 0

Answer:

The ancient Greeks believed in the four elements of air, earth, fire, and water. The Greek philosopher Empedocles is known for originating the theory of these classic four elements being the basis of all things.

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3 years ago
What is the molarity if I take 10mL of 20 volumes Hydrogen Peroxide?
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Answer:

1.635 M

Explanation:

Given:

10 mL of 20 volumes Hydrogen Peroxide

Here,

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also,

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Now,

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20 dm³ oxygen = \frac{\textup{20}}{\textup{24.47}}  moles

or

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also,

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thus,

1 dm³ of solution must contain 2 × moles of O₂ as moles of H₂O₂

thus,

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or

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3 0
3 years ago
Based on what you’ve determined regarding one mole of sand and one mole of water, which statements must be correct? Select all t
Igoryamba

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Explanation:

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Condensation happens when water vapor cools. true or false??
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