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Zigmanuir [339]
3 years ago
15

The atomic number is equal to

Chemistry
1 answer:
Yuri [45]3 years ago
3 0
1. “what forms of energy conversions occur during the process of photosynthesis? (How does energy transform?) 2. What is missing from the food web but is essential to maintain equilibrium? A. Soil B.water C. Decomposers D. Oxygen
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At the boiling point, the vapor pressure of a liquid is equal to the _______.
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At the boiling point, the vapor pressure of a liquid is equal to the atmospheric pressure.
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After completing an experiment to determine gravimetrically the percentage of water in a hydrate, a student reported a value of
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Answer:

b) The dehydrated sample absorbed moisture after heating

Explanation:

a) Strong initial heating caused some of the hydrate sample to splatter out.

This will result in a higher percent of water than the real one, because you assume in the calculation that the splattered sample was only water (which in not true).

b) The dehydrated sample absorbed moisture after heating.

Usually inorganic salts may absorbed moisture from the atmosphere so this will explain the 13% difference between calculated water percent the real content of water in the hydrate.

c) The amount of the hydrate sample used was too small.

It will create some errors but they do not create a difference of 13% difference as stated in the problem.

d) The crucible was not heated to constant mass before use.

Here the error is small.

e) Excess heating caused the dehydrated sample to decompose.

Usually the inorganic compounds are stable in the temperature range of this kind of experiments. If you have an organic compound which retain water molecules you may decompose the sample forming volatile compounds which will leave crucible so the error will be quite high.

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When a -COOH group replaces a hydrogen in a hydrocarbon the result is a/an ____.
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