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3 years ago

[BWS.05H] The diagram below shows an incorrect model of an atom.

Chemistry

1 answer:

VLD [36.1K]3 years ago

5 0

Answer:

The nucleus contains negatively charged particles (electrons) thereby making it to be neutral

Explanation:

An atom contains a centrally placed nucleus containing protons and neutrons while the electrons revolve around the nucleus.

The protons are positively charged while the neutrons has no charge. The electrons are negatively charged.

In the model given above, the centrally placed nucleus has negatively charge particles together with the positive charge particles thereby making it to be neutral. This is not acceptable as the nucleus of an atom is always positively charged.

The correct model of the atom should only have positive nucleus because the neutrons have no charge while negatively charged electrons revolve around.

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The mechanical properties of a material affect how it behaves as it is loaded. The elastic modulus of the material affects how much it deflects under a load, and the strength of the material determines the stresses that it can withstand before it fails

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2 years ago

Identify 5 basic examples of Solutions?

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3 years ago

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What pressure is required to compress 196.0 liters of air at 1.83 atmosphere into a cylinder whose volume is 26.0 liters

drek231 [11]

Answer:

P₂ = 13.79 atm

Explanation:

Given data:

Initial volume = 196.0 L

Initial pressure = 1.83 atm

Final volume = 26.0 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

1.83 atm × 196.0 L = P₂× 26.0 L

P₂ = 358.68 atm. L / 26.0 L

P₂ = 13.79 atm

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3 years ago

Which of the following molecules are considered inorganic?

Oksi-84 [34.3K]

The answer is D water

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2 years ago

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The cylinder of aluminum in class was approximately 13mm in circumference and 42mm in length. What would be it's approximate mas

Roman55 [17]

Answer:

Mass, m = 1.51 grams

Explanation:

It is given that,

The circumference of Aluminium cylinder, C = 13 mm = 1.3 cm

Length of the cylinder, h = 4.2 cm

We know that the density of the Aluminium is 2.7 g/cm³

Circumference, C = 2πr

$r=\dfrac{C}{2\pi}\\\\r=\dfrac{1.3}{2\pi}\\\\r=0.206\ cm$

Density is equal to mass per unit volume.

$d=\dfrac{m}{V}$

m is mass of the cylinder

V is the volume of the cylinder

$V=\pi r^2h\\\\V=\dfrac{22}{7}\times0.206^2\times 4.2\\\\V=0.5601\ cm^3$

So,

$m=d\times V\\\\m=2.7\times 0.5601\\\\m=1.51\ g$

So, the mass of the cylinder is 1.51 grams.

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3 years ago