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2 years ago

Why do trees produce carbon dioxide (CO2) at night?.

Chemistry

1 answer:

TiliK225 [7]2 years ago

5 0

Answer:

Because photosynthesis ceases due to the lack of sunlight.

Explanation:

Plants typically absorb CO2 and release oxygen, but they also “exhale” CO2, particularly at night, when photosynthesis ceases due to the lack of sunlight. Forests also emit more CO2 when they are stressed by increasing temperatures.

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What is wrong with the chemical reaction written below?

REY [17]

Answer:

b) The mass of your total product is greater than your total reactants

Explanation:

Mass of reactants is 20 and product is 25 which never occurrs in real

3 0

3 years ago

Its a lot cheaper and wanted to know if you think it would be just as good?

Firdavs [7]

Yes. Price should be a factor that you consider

5 0

3 years ago

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital and please explain why

alexandr1967 [171]

Answer:

Option A) n = 5, ℓ= 3, mℓ= +1 is a correct set of quantum numbers for an electron in a 5f orbital.

Explanation:

1) n is the main or principal quantum number. It is an integer number from 1. So, it may be 1, 2, 3, 4, 5, ...

2) In 5f, the principal quantum number is n = 5.

So, the possible correct choices are A) n = 5, ℓ = 3, mℓ = +1 or D) n = 5, ℓ = 4, mℓ = 3.

3) ℓ is the second or the orbital angular momentum quantum number.

ℓ can be an integer number from 0 to n - 1.

So, when n = 5, ℓ can be 0, 1, 2, 3 or 4, only one of those.

This quantum number is also the subshell or kind of orbital.

This summarizes the relation between the number and the letter that identifies the kind of orbital:

ℓ kind of orbital

0 s

1 p

2 d

3 f

So, for an electron in 5f orbital, the first two quantum numbers are n = 5, ℓ = 3.

With that, you already know that the correct choice can only be A) n = 5, ℓ = 3, mℓ = +1.

4) mℓ is the third or the magnetic quantum number. This quantum number can take the values from - ℓ to + ℓ. So, for ℓ = 3 (or f) , it can be -3, -2, -1, 0, +1, +2, or +3.

Hence, A) n = 5, ℓ= 3, mℓ= +1 is a correct set of quantum numbers for an electron in a 5f orbital.

7 0

4 years ago

If a gas occupies 4600 mL at 0.9 atm and 195°C, what is the new volume in ml

Bumek [7]

Answer:

The new volume is 2415 mL

Explanation:

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases.

Boyle's law says that the volume occupied by a given gas mass at constant temperature is inversely proportional to the pressure and is expressed mathematically as:

P * V = k

Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between volume and temperature will always have the same value:

$\frac{V}{T} =k$

Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the gas pressure increases. And when the temperature is decreased, the gas pressure decreases. This can be expressed mathematically in the following way:

$\frac{P}{T} =k$