How would you use density to identify an unknown substance?

1 answer:

3 0

Most elements and compounds have a very specific density value. If you figured out the density the density of the unknown substance it can be compared to all the known densities, until a match is found. E.g. if you found a liquid that had the density of 1g/cm^3 its water whereas if its 0.789g/cm^3 its pure ethanol

Density is calculated by the equation "Dentisy = mass of the substance/ Volume of the substance".

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An insoluble base reacts with an acid to form a salt

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Explanation:

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3 years ago

A stable atom that has a large nucleus most likely contains

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Answer:

3. Equal numbers of protons and neutrons

Explanation:

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The standard molar heat of fusion of ice is 6020 j/mol. calculate q, w, and ∆e for melting 1.00 mol of ice at 0◦c and 1.00 atm p

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Answer : q = 6020 J, w = -6020 J, Δe = 0

Solution : Given,

Molar heat of fusion of ice = 6020 J/mole

Number of moles = 1 mole

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Molar heat of fusion : It is defined as the amount of energy required to melt 1 mole of a substance at its melting point. There is no temperature change.

The relation between heat and molar heat of fusion is,

$q=\Delta H_{fusion}(\frac{Mass}{\text{ Molar mass}})$ (in terms of mass)