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just olya [345]
3 years ago
12

FREE BRAINLIEST IF CORRECT

Chemistry
2 answers:
Veronika [31]3 years ago
8 0

Answer:

Reflection.

Explanation:

An echo is an example of wave reflection. Reflection occurs when waves bounce back from a surface they cannot pass through.

Hope this helps

tangare [24]3 years ago
6 0

Answer:

reflection because they reflect back for the animals to know what is happening

Explanation:

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Answer:

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Explanation:

In the example, the amount of hydrogen is 202,650 x 0.025 / 293.15 x 8.314472 = 2.078 moles. Use the mass of the hydrogen gas to calculate the gas moles directly; divide the hydrogen weight by its molar mass of 2 g/mole. For example, 250 grams (g) of the hydrogen gas corresponds to 250 g / 2 g/mole = 125 moles.

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Reika [66]

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