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3 years ago

Question 8 of 10

Chemistry

2 answers:

valkas [14]3 years ago

5 0

Answer:

It is (A.) Gases have the highest kinetic energy, followed by liquids, and then solids

Explanation:

Gases have high kinetic energy because their particles are far apart from each other and have a negligible force of attraction, whereas Liquids have the high force of attraction as compared to gases so they have less kinetic energy than gases, and Solids have the high force of attraction between their particles because of that its molecules are closely packed, therefore

Gases have the highest kinetic energy,

Followed by Liquids,

Then finally, Solids with the lowest kinetic energy.

Akimi4 [234]3 years ago

3 0

I think the right answers is c

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A car travelling at 20km per hour emits about 0.0750kg of carbon monoxide per kilometre. How many mole of carbon monoxide are em

natta225 [31]

Answer:

2.67761514 moles

Explanation:

0.075kg equates to 75g.

This means that the car emits 75g of CO per km.

dividing 75g by the molar mass of CO (28.01g/mol) we get 2.67761514 moles

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3 years ago

The radius of a krypton atom is 110pm and it's mass is 1.39x10 to -22 g.

Readme [11.4K]

Answer:

$24.9~g/cm^3$

Explanation:

Density is found dividing mass by volume. In this case, we treat krypton as a sphere having a volume of $V = \dfrac{4}{3}\pi r^3$ . Given:

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We obtain density of:

$d = \dfrac{m}{V} = \dfrac{m}{\dfrac{4}{3}\pi r^3} = \dfrac{3m}{4\pi r^3}$

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This is not a feasible value for a gas like krypton, its radius is actually not 110 pm.

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3 years ago

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The answer is D! Explaination:

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3 years ago

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4 years ago

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mihalych1998 [28]

Answer:

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Explanation:

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3 years ago