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Zepler [3.9K]
3 years ago
8

1) All atoms are _____.

Chemistry
2 answers:
Katyanochek1 [597]3 years ago
6 0

All atoms are of <u>neutral charge, with an equal amount of protons and electrons.</u>

bekas [8.4K]3 years ago
4 0

Answer : The correct option is, (b) All atoms are of neutral charge, with an equal amount of protons and electrons.

Explanation :

As we know that an atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.

The protons and the neutrons are located inside the nucleus or center of the nucleus where the mass of the an atom is concentrated and the electrons are located around the nucleus.

The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.

  • When the number of electrons are more than the number of protons then the element is negatively charged.
  • When the number of protons are more than the number of electrons then the element is positively charged.
  • When the number of electrons are equal to the number of protons then the element is neutral charged.

From this we conclude that, all the atoms are of neutral charge, with an equal amount of protons and electrons.

Hence, the correct option is (b)

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Calculate the new pressure if a 2300 mL of a gas at a pressure of 1.88 atm is allowed to contract to a volume of 2.21 L.
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Answer:

V₂ = 0.958 atm

Explanation:

Given data:

Initial volume = 2300 mL (2300/1000 = 2.3 L)

Initial pressure = 1.88 atm

Final volume = (2.21 L + 2.3L) = 4.51 L

Final pressure = ?

Solution;

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1.88 atm × 2.3 L =  P₂ × 4.51 L

V₂ = 1.88 atm × 2.3 L / 4.51 L

V₂ = 4.32 atm.L /  4.51 L

V₂ = 0.958 atm

6 0
3 years ago
What is the chemical formula for aluminium?
Leya [2.2K]

Answer

Aluminum is a silvery-white metal which is extremely soft by nature. Totally earth's crust contains 8% of Aluminum. Aluminium is a low-density nonmagnetic and ductile metal which can be made into sheets or wires as required

Explanation:

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Why do metals differ in specific heat? Why is Al much higher than gold?
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The nature of the elements or compounds (metalic elements in this case) determines the transference of heat inside the body of the object. The mechanism of heat transfer inside the metals is conductivty. The more compact and denser the metal, the closer the atoms and the faster the transference of heat by conductivity and the lower the specific heat.

Then,  the reason why specific heat of Al is much lower than gold, is that gold is much denser than Al.
6 0
4 years ago
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