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nirvana33 [79]
3 years ago
15

!!please help asap ty!!

Chemistry
1 answer:
Bess [88]3 years ago
7 0

Answer:

2.89× 10²³ atom

Explanation:

Given data:

Number of atoms of Zn = ?

Number of moles of Zn = 0.48 mol

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atom

0.48 mol ×  6.022 × 10²³ atom / 1mol

2.89× 10²³ atom

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Answer:

true

Explanation:

The second type of bone marrow found in the body is yellow bone marrow, which gets its name from its high concentration of fat cells, which appear yellow in color. This type of bone marrow can be found in the medullary cavity in the shaft of long bones and is often surrounded by a layer of red bone marrow.

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3 years ago
5. Which are physical properties of a property of Aluminum metal?
4vir4ik [10]

Answer:

Aluminum is a shiny, silvery white colored metal that is light in weight and strong. Th density of aluminum is 2.7 g/mL, which means the metal will sink in water, but is still relatively light

Hope this helps (:

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8 0
3 years ago
Hello<br><br><br> WRITE CAUSES AND CONSEQUENCE OF ANY 2 NATURAL CALAMITIES.
-Dominant- [34]

Answer:

1) eathquake

earthquake is the natural calamities where there is the vertical and horizontal shaking of the

earth crust. it is cause due to overlappibg of the different plates that are present in the earth surface. when this plates intersect or expand the earth occurs

consequences are it causes loss of life and human property , degards the environment , it leads to flood, landslides etc The damage caused by earthquakes is from ground shaking, ground rupture, landslides, tsunamis, and liquefaction.

Next - volcanic eruption

its is the out flow of the larva from the inner of the earth to other surface. it is cayse due to high pressure exerted on the surface of the earth that leads to explode the inner larva.

its consequences are it degards the environment and loss of the beauty of the nature , there is loss of human life , widlife , etc. volcanic eruption include infectious disease, respiratory illness, burns, injuries from falls, and vehicle accidents related to the slippery, hazy conditions caused by ash. When warnings are heeded, the chances of adverse health effects from a volcanic eruption are very low.

7 0
3 years ago
Identify the acid, base, conjugate acid and conjugate base in the following reactions:
Leni [432]

Answer:

a. NH₃ : base

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NH₄⁺ : conjugate acid

CH₃COO⁻ : conjugate base

b. HClO₄ (perchloric acid) : acid

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ClO₄⁻ : conjugate base

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Hope this helps.

4 0
3 years ago
Why is the expectation value of the energy associated with the 1-D "particle-in-a-box" the same as the eigen value of the Hamilt
Veronika [31]

Answer: The average potential energy of the PIB is 0 irrespective of the wave function.

Explanation:

⟨H⟩=⟨KE⟩+⟨V⟩

the nn quantum number

⟨KE⟩=(π^2 ℏ^2)/(2mL^2 )

the average kinetic energy of the wavefunction is dependent on

⟨V⟩=∫sin(kx)0sin(kx)dx=0

The average potential energy of the PIB is 0 irrespective of the wave function.

⟨H⟩=⟨KE⟩=(π^2 ℏ^2)/(2mL^2 )

4 0
3 years ago
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