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irakobra [83]
3 years ago
5

Help me on this, offering 20 points and Brainliest​

Chemistry
1 answer:
Oxana [17]3 years ago
4 0

Answer:

not too sure.

Explanation:

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If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at a constant temperature. What is the new volume​
wel

Answer :

=748

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3 years ago
Ana amount of nitrogen undergoes a physical change and increases its volume. What can be known about this physical change
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Answer:

D.) the density changed

Explanation:

This would be the answer because it is a specific amount of Nitrogen undergoing a physical change. Since the color and boiling point don't influence a change in volume, those are ruled out. Also, nitrogen's molecular mass never changes, so that would not make sense either. But if the density, which is mass/volume, has changed (more specifically decreases) then it means the volume has increased.

Hope this helps.

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3 years ago
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Emerald-green crystals of the substance are used in nickel plating. what is the chemical name of this compound
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The chemical name of the substance is nickel sulfate hexahydrate.

Emerald-green crystals of the substance are used in nickel plating. The chemical name of this compound nickel sulfate hexahydrate.

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3 years ago
3. Calculate the molecular or formula mass of each of the following: (a) Pa (c) Ca(NO3)2 (d) CH3CO2H (acetic acid)​
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bdejwefbewjf

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1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressure, to form. an oxide which contains O2– ion
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D sodium
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