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3 years ago

5. Didderent betwen group and period.

Chemistry

1 answer:

Ronch [10]3 years ago

3 0

A group goes vertically and a period goes horizontally.

(a group goes down and a period goes across)

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the atomic number of an element x is 14 and its relative atomic mass is 28 write the electronic distribution in an atom of x

AlekseyPX

Answer:

the electronic distribution in an atom of x is 14

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2 years ago

Part 1: A cylinder containing 20.0 L of compressed nitrogen is connected to an empty (evacuated) vessel with an unknown volume.

baherus [9]

Answer:

The volume of the vessel is 250 L

Partial pressure of hydrogen = 189 torr

Explanation:

Using Boyle's law

${P_1}\times {V_1}={P_2}\times {V_2}$

Given ,

V₁ = 20.0 L

V₂ = ?

P₁ = 25 atm

P₂ = 2 atm

Using above equation as:

${P_1}\times {V_1}={P_2}\times {V_2}$

${25}\times {20.0}={2}\times {V_2}$

${V_2}=\frac {{25}\times {20.0}}{2}\ L$

${V_2}=250\ L$

<u>The volume of the vessel is 250 L.</u>

According to Dalton's law of partial pressure:-

$P_{H_2}=Mole\ fraction\times Total\ Pressure$

So, according to definition of mole fraction:

$Mole\ fraction\ of\ H_2=\frac {n_{H_2}}{n_{H_2}+n_{He}}$

Also,

Mole fraction of H₂ = 1 - Mole fraction of He = 1 - 0.75 = 0.25

So,

Total pressure = 756 torr

Thus,

$P_{H_2}=0.25\times 756\ torr$

<u>Partial pressure of hydrogen = 189 torr.</u>

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3 years ago

The global movement of air occurs in convection cells. In general,how does air move

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Air moves when the molecules are free meaning they aren't close up to each other or trying to fill up space, they are moving freely.

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3 years ago

In the wild, female and juvenile African elephants typically live in herds that vary in size, depending on the

uysha [10]

Herd behavior in elephants ensures that individuals are protected and the species is perpetuated.

<h3>What is her behavior?</h3>

It is a behavior that is characteristic of animals that form herds.

Herds generally refer to groups of animals that live or move together or both.

By protecting individual elephants that are weak or young from being preyed upon by lions and leopards, more members of the population survive.

When more members of the population survive, the species is perpetuated and the likelihood of going into extinction reduces.

More on herd behavior can be found here: brainly.com/question/15112922

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2 years ago

Youll get brainliest!!!

Dmitrij [34]

<span>A. Mechanic agitations</span>

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3 years ago

5. Didderent betwen group and period.​

5. Didderent betwen group and period.