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lesya692 [45]
3 years ago
11

What is jin wang's response to finding wei-chen and amelia locked in the biology lab closet?

Biology
1 answer:
Sergeu [11.5K]3 years ago
3 0
He asks Amelia out. APEX
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Which of the following samples will have the greatest volume at STP?a. 22 g Neb. 22 g Hec. 22 g O2d. 22 g Cl2 e. All have the sa
sammy [17]

Answer:

22g of He

Explanation:

Volume of gas at STP is given as :

Volume occupied(dm³) = number of moles x 22.4dm³mol⁻¹

In order to solve this given problem, we would first find the number of moles from the different masses of atoms and molecules given.

Number of moles = \frac{mass }{Molar mass}

Now, let us obtain the molar mass of the given atoms and elements:

For Ne; molar mass is the atomic mass = 20gmol⁻¹

      He = 4gmol⁻¹

      O₂ = (16 x2)gmol⁻¹  = 32gmol⁻¹

      Cl₂ = (35.5x2)gmol⁻¹ = 71gmol⁻¹

Number of moles of Ne = \frac{22}{20} = 1.1mol

Volume occupied by Ne at STP = 1.1 x 22.4 = 24.64dm³

       

Number of moles of He = \frac{22}{4} = 5.5mol

Volume occupied by He at STP = 5.5 x 22.4 = 123.2dm³

Number of moles of O₂ = \frac{22}{32}  = 0.688mol

Volume occupied by O₂ at STP = 0.688 x 22.4 = 15.4mol

Number of moles of Cl₂ = \frac{22}{71} = 0.3099mol

Volume occupied by Cl₂ at STP = 0.3099 x 22.4 = 6.94dm³

5 0
3 years ago
What is the process by which substances move from areas of higher concentration to areas of lower concentration
AleksandrR [38]

Answer:

Diffusion

Explanation:

The process by which substances move from areas of higher concentration to areas of lower concentration is called diffusion.

For example:

Substance moves across a cell membrane without using the cell's energy tends to move away from the area where it is more concentrated.

It is known as passive transport.

It is the process in which substance without using the cellular energy tend to move down the concentration gradient.

It is also known as simple diffusion.

When perfume bottle is open particles spread in air due to difference in concentration from bottle to out side environment.

While,

In case of active transport substance move against the concentration gradient i.e to wards the area of higher concentration.

This process require energy.

4 0
3 years ago
Some natural substances can be dangerous if misused.<br> True<br> False
shusha [124]

Answer:

true

Explanation:i just know trust me

4 0
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Nutrients from digested food enter the bloodstream through the process of
Dahasolnce [82]

Answer:

1. Absorption is the answer

8 0
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A bacterium is inoculated into a tube of nutrient broth and incubated. After incubation, it appears turbid throughout, top to bo
BaLLatris [955]

Answer:

facultative anaerobe

Explanation:

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