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Alex_Xolod [135]
3 years ago
10

You have 1 1/2 moles of 1 kg bottles of O2. What is the mass of O2 that you have? A. 9.033x10^23 kg B. 9.033x10^23 atoms C. 1.80

x10^27 kg D. 1.806x10^24 moles

Chemistry
2 answers:
ki77a [65]3 years ago
8 0

Answer:

B

Explanation:

Rashid [163]3 years ago
6 0

Answer:

b

Explanation:

trust

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10.9%.

Explanation:

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The next thing you do is to Determine the exponential density, the can be done by using the formula below;

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What is the total amount of heat released when 94.0 g water at 80.0 °C cools to form ice at −30.0 °C?
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Answer:

The total amount of heat released  is  68.7 kJ

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Q1 = m Cp dT

      = 94 x 4.184 x (0 - 80)

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Q3 = - 94 x 2.09 x 30

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Total heat = Q1 + Q2 + Q3  = -31.43 kJ  + (-31.35 kJ  ) + (-5.894 kJ )  = -68.7 kJ

Total heat released = -68.7 kJ

Note that the "negative sign" simply indicates heat released, therefore no need to put it in the answer.

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