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2 years ago

How does the flow of energy during freezing compare with the flow of energy during melting

Chemistry

1 answer:

lianna [129]2 years ago

3 0

Answer:

At the melting point, some molecules overcome the forces of attraction. Energy gained after the the solid melts increases the average kinetic energy or the temperature. When liquid is freezing the energy flows out the the liquid. As the kinetic energy decreases, they move more slowly.

Explanation:

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Which do you think has more mass, 1 mole of fructose, 1 mole of sucrose or 1 mole of aspartame? Explain your reasoning.

pogonyaev

Answer:

i think they would be all the same

Explanation:

they sound like sugars

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2 years ago

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Zoe is frying eggs in a pan. The eggs cook because of _____ of heat. Zoe feels hot as she stands near the stove mostly because o

erica [24]

Answer:

1) conduction

2) Radiation

Explanation:

Conduction is a mode of heat transfer by which heat energy is transferred through a material, the average position of the particles of the material remaining the same.

Radiation is a process of heat transfer by which heat is transferred from a hotter to a cooler point without any intervening medium.

The pan used to fry the egg is a conductor of heat hence heat can pass through it by conduction thereby enabling the eggs to cook.

Heat can travel without an intervening medium hence Zoe feels hot near the stove. This ability of the heat to travel without an intervening medium is called radiation.

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3 years ago

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What is the mass of 4.75 moles of arsenic trichloride?

Lina20 [59]

Answer:

1 mole is equal to 1 moles Arsenic Trichloride, or 181.2806 grams.

Explanation:

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3 years ago

“Aqueous calcium hydroxide reacts with carbon dioxide gas to produce solid calcium carbonate and liquid water.” Which chemical e

Svetlanka [38]

Ca(OH)2(aq) + CO2(g) —> CaCO3(g) + H2O(l)

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3 years ago

Draw three different Lewis structures that could be possible for ZX2, assuming that Z is the central atom and that X is not hydr

Mariana [72]

Answer:

See images attached and explanation

Explanation:

I have drawn three possible structures of ZX2. We have to remember that the shapes of molecules could be predicted on the basis of the Valence shell electron pair repulsion theory.

The number of electrons on the valence shell of the central atom determines the shape of the molecule. We have also been told that X is not hydrogen.

If the two X atoms are arranged at a bond angle of 180 degrees, we could have either structure I or II. We will have these structures if the Z atom is sp2 hybridized.

Similarly, if the Z atom is sp3 hybridized, we may have structure III in which the molecule is bent with a bond angle less than 109 degrees. This may result from the presence of a lone pair on Z.

Note that all these structures obey the octet rule.

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2 years ago