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Usimov [2.4K]
3 years ago
6

Copper has 29 protons, 34 neutrons, and 29 electrons. what is the atomic number of copper?

Chemistry
1 answer:
liberstina [14]3 years ago
3 0
Lt will be 29 
http://www.chemicalelements.com/elements/cu.html
here is the link to cheek 
good luck .
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Assume the solubility of benzoic acid in ice-cold water is 1.70 g/L and the solubility of benzoic acid in hot water is 68.0 g/L.
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Answer:

The volume of water needed to recrystallize 0.700 g of benzoic acid is 10.29 mL.

Explanation:

For the complete recrystalization,

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As we are given that the solubility of benzoic acid in hot water is 68.0 g/L. Now we have to determine the volume of water is needed to recrystallize 0.700 g of benzoic acid.

we conclude that,

As, 68.0 grams of benzoic acid soluble in 1 L of water.

So, 0.700 grams of benzoic acid soluble in  of water.

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conversion used : (1 L = 1000 mL)

Therefore, the volume of water needed to recrystallize 0.700 g of benzoic acid is 10.29 mL.

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