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4 years ago

At a molecular level describe the differences between a hot object and a cold object

Chemistry

1 answer:

Inessa [10]4 years ago

5 0

Answer:

Explanation:

The hot object are those which have high energy atoms that moves with a very fast energy whereas the cold object are those which have low energy atoms and moves with low speed.

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Classify which compounds will dissolve in water and which ones will not dissolve in water.

vredina [299]

Answer:

Dissolves in water: Acetone, 1-propanol, Methanol

Do not dissolve in water: Hexane, Decane

Explanation:

From the principle that like dissolves like,polar substances will dissolve in polar solutions, while non-polar substances will dissolve in non-polar substances.

Water is a polar solution, therefore, polar substances will dissolve in it.From the given options:

Acetone is a polar molecule, therefore, it will dissolve in water.

1-propanol is a polar molecule, therefore, it will dissolve in water.

Hexane is a non-polar molecule, therefore, it will not dissolve in water.

Methanol is a polar molecule, therefore, it will dissolve in water.

Decane is a non-polar molecule, therefore, it will not dissolve in water

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3 years ago

A sample has a mass of 1.2 g and a volume of 1.1 cm? What is the density of this sample?

mamaluj [8]

Answer:

Density is a physical quantity, defined as the ratio of body mass to the volume occupied by this body. The average body density is the ratio of body weight to its volume.

Since the mass in a body can be distributed unevenly, a more adequate model defines the density at each point of the body as a derivative of mass over volume.

Thus, to obtain the density of a sample, its mass must be divided by its volume. Thus, the density of the sample is 1.2 / 1.1, that is, 1.09 g/cm3.

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3 years ago

Which has a greater momentum, a car or a bike moving at the same speed

blsea [12.9K]

The car has greater momentum because it has more mass than a bike, even if they have the same speed. I hope this helped! :-)

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4 years ago

The ratio of the heights 1.50 m and 75 cm of two persons can be written as

Blizzard [7]

Answer:

The required ratio would be 2:1

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3 years ago

Chemical name for Fe2O3?

Flura [38]

The chemical name is ferric oxide or iron (III) oxide or hematite. We can found it naturaly as a magnetite, mineral.

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4 years ago

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At a molecular level describe the differences between a hot object and a cold object​

At a molecular level describe the differences between a hot object and a cold object