What’s the distance between propane particles?

Copy and complete the concept map using the following:

lapo4ka [179]

Answer:

a) Alkali

b) Na

c) Cs

d) Inner Transition

e) actinides

f) Fe

g) Hg

Explanation:

K, Na and Cs are all Alkali Metals
Fe, Hg and Ag are all Transition Metals
actinides and lanthanides are known as the Inner Transition Metal

7 0

3 years ago

Test Name: GR8_Sci_U07_USA_FY20

kumpel [21]

The distance from the star to the Earth

Explanation:

The absolute brightness of a star is a measure of the intrinsec luminosity of the star, i.e. it does not depend on the distance of the star from the Earth.

In other word, the absolute brightness is a measure of the luminosity of a star if all stars were placed at the same distance from Earth.

On the other hand, the relative brightness of a star is a measure of its luminosity as observed on Earth, therefore it does depend on the distance of the star from the Earth: the farther the star is, the more its luminosity will decrease, and vice-versa.

The star's absolute brightness, therefore, depends only on the characteristics of the star itself, namely:

- The absolute magnitude of the star

- The rate at which the star produces energy via nuclear fusion

- The rate at which the star releases energy via electromagnetic radiation

Therefore, the only factor that does NOT change if the absolute brightness of a star changes is

- The distance from the star to the Earth

Learn more about planets and stars:

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8 0

3 years ago

What is the representative particle for copper metal, Cu

Mamont248 [21]

A representative particle is the smallest unit of a substance that can be broken down without altering the composition. Matter is composed of three types of representative particles: atoms, molecules and formula units.

Atoms and Elements

Atoms are the smallest particle that can be split. Substances that contain only one kind of atom are called elements.

Molecules

The molecule is the representative particle of molecular compounds. It is also the representative particle of diatomic elements.

Formula Unit

The representative particle of an ionic compound is the formula unit. A formula unit uses a formula to calculate the basic whole number ratio of the ions in an ionic compound.

Diatomic Elements

Diatomic elements, or molecules, are made up of two atoms of the same element. These diatomic elements are not part of a compound.

6 0

3 years ago

Read 2 more answers

Heating up a reaction does which of the following:

Svetradugi [14.3K]

Heating up a reaction does increase the number of collision only.

Hence, Option C is correct answer.

<h3>What is Collision Theory ? </h3>

According to the collision theory, the reaction take place when the collision occur and molecules having sufficient energy or threshold energy for collision.

The collision of molecules depend on the kinetic energy of molecules. Greater the kinetic energy greater the number of molecules collide. Lesser the kinetic energy lesser will be collision.

<h3>How temperature affect the collision theory ?</h3>

With an increase in temperature, there is an increase in energy that can be converted into activation energy in a collision, and that will increase the reaction rate. A decrease in temperature would have the opposite effect. With an increase in temperature, there is an increase in the number of collision.

Thus from the above conclusion we can say that Heating up a reaction does increase the number of collision only.

Hence, Option C is correct answer.

Learn more about collision theory here:

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7 0

1 year ago

As the chain length of a hydrocarbon is increased the heat of vapourization

White raven [17]

Answer:

Answer is d, strength of London forces increases with molecular size.

Explanation:

Dispersion forces are the forces preesnt between all intermingling atoms, molecules and particles. Dispersion forces are the weakest intermolecular force, but they build up with the addition of more atoms, molecules or particles. Heat of vapourisation or boiling point is dependant on the energy required to break the bonds within the molecule/hydrocarbon in question. The build up of dispersion forces create greater intermolecular forces, which make the boiling of a substance more difficult. Hence increased hydrocarbon chain length, and the related increased eat of vapourisation is due to how the strength of the London/Dispersion forces increases with molecular size

6 0

2 years ago