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nikklg [1K]
3 years ago
7

You are asked to determine the identity of an unknown liquid and can measure only one physical property. you heat a liquid and r

ecord the liquid turns to vapor at 100 Celsius: this demonstrates which physical property?
Chemistry
1 answer:
Licemer1 [7]3 years ago
5 0
This demonstrates the boiling point. The substance changes from liquid to gas which is the point of vaporization and since it is from heat, it is boiling.
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Determine the number of atoms of O in 92.3 moles of Cr3(PO4)2
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739 is the number of atoms of O in 92.3 moles of Cr3(PO4)2.

Explanation:

Molecular formula given is  = Cr3(PO4)2

number of moles of the compound is 92.3 moles

number of 0 atoms in 92.3 moles =?

From the chemical formula 1 mole of the compound has 8 atoms of oxygen

So, it can be written as

1 mole Cr3(PO4)2 has 8 atoms of oxygen

92.3 moles of Cr3(PO4)2 has x atoms of oxygen

\frac{8}{1} = \frac{x}{92.3}

x = 8 x 92.3

x = 738.4 atoms

There will be 739 oxygen atoms in the 92.3 moles of Cr3(PO4)2.

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