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3 years ago

How are the melting points and boiling points of molecular compounds usually different from those of ionic compounds

1 answer:

6 0

Melting points and boiling points of molecular compound are usually lower than ionic compounds. This is so as only a small amount of energy is required to overcome the weak intermolecular forces of attraction (Van de Waals forces) thus having lower m.p. and b.p.

Ionic compounds require a large amount of energy to overcome the strong electrostatic forces of attraction between the ions, hence having higher mp and bp

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The change in its axis or orbit

saw5 [17]

Axis I hope this helped answer orbit or axis

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3 years ago

What % of the earth's freshwater is found in glaciers and ice packs? 0.03% 0.03% 3% 3% 24.9% 24.9% 75%

Westkost [7]

Answer:

En verdad solo el 0,025% del agua de la tierra es dulce

Explanation:

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3 years ago

Based on periodic properties, choose the more metallic element from each of the following pairs.

dimulka [17.4K]

Answer:

Sr is the more metallic element

Bi is the more metallic element

O is the more metallic element

As is the more metallic element

Explanation:

One thing should be clear; metallic character increases down the group but decreases across the period.

Hence, as we move across the period, elements become less metallic. As we move down the group elements become more metallic.

This is the basis upon which decisions were made about the metallic character of each of the elements listed above.

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3 years ago

A scientific ________ must have a control, so that the variables that could affect the out come is reduced. A:experiment B:concl

Lostsunrise [7]

Answer:

A.experiment

Explanation:

hope this helps

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3 years ago

When an object is lifted 10 feet off the ground, it gains a certain amount of potential energy. If the same object is lifted 30

Elden [556K]

Answer: 3 times as much the potential energy

Explanation:

Potential energy is the energy possessed by an object by virtue of its position.

$P.E=m\times g\times h$

m= mass of object

g = acceleration due to gravity

h = height of an object

When same object with same is lifted from 10 feet to 30 feet. The height has increased 3 times , thus the potential energy will also get 3 times as much.

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3 years ago