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Oliga [24]
2 years ago
14

Without the atmosphere, life on Earth would not be possible. Which of the following is NOT an explanation for how Earth’s atmosp

here protects life on the planet?
A. It allows visible light to pass through completely.


B. It contains gases that filter out ultraviolet radiation.

C. It keeps Earth warm by trapping in heat.

D. It protects life from ultraviolet rays of light
Chemistry
2 answers:
kvasek [131]2 years ago
3 0

Answer:

B

Explanation:

IM A CHEMISTRY WIZZZZ

:)

I hope u get full marks on your paper/test/quiz or whatever!

There is a 20 percent chance so stay positive!

Alex73 [517]2 years ago
3 0

Answer:

D

Explanation: ultraviolet rays are harmful to humans

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Which material is likely to slow the<br> flow of electric charges the most? Explain.
AlladinOne [14]

Explanation:

Atoms of metals do not hold their electrons to themselves. Instead they allow them to float around them delocalised. This is important because it is this characteristic that allows metals to be good conductors of electricity since electrons are free to move around to carry a charge.

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5 0
3 years ago
What are valence electrons ?
Arada [10]

Answer:In chemistry, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.

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3 years ago
Relate what you have learned about the word quantum to the Bohr model.​
ss7ja [257]
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7 0
3 years ago
A first-order decomposition reaction has a rate constant of 0.00440 yr−1. How long does it take for [reactant] to reach 12.5% of
mina [271]

Answer:

473 year

Explanation:

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

Given:

To reach 12.5% of reactant means that 0.125 of [A_0] is decomposed. So,

\frac {[A_t]}{[A_0]} = 0.125

t = ?

\frac {[A_t]}{[A_0]}=e^{-k\times t}

0.125=e^{-0.00440\times t}

t = 473 year

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