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Stolb23 [73]
3 years ago
5

Which of the following elements does not form hydride by direct heating with

Chemistry
2 answers:
Sholpan [36]3 years ago
5 0
The answer to this question is BE
ozzi3 years ago
4 0
I believe the answer is A.

Hope this helps! ^^
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A 10 gram sample of water is heated to 105 ℃ and is mixed with a 25 gram sample of water cooled to 25℃ . What is the final tempe
lesya692 [45]

Answer:

The final temperature of the water mixture is 47.85°C

Explanation :

Given,

For Warm Water

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For Cold Water

mass = 25grams

Temperature = 25°C

When a sample of warm water is mixed with a sample of cool water,

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<h3>Qlost = Qgain</h3>

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Q = (mass) (ΔT) (Cp)

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(mass) (ΔT) (Cp) = (mass) (ΔT) (Cp)

We start by calling the final, ending temperature 'x.' Keep in mind that BOTH water samples will wind up at the temperature we are calling 'x.' Also, make sure you understand that the 'x' we are using is FINAL temperature. This is what we are solving for.  

The warmer water goes down from to 105°C to x, so this means its Δt equals 105°C − x. The colder water goes up in temperature, so its Δt equals x − 25℃

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8 0
4 years ago
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