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swat32
3 years ago
9

How can the actions of people affect runoff and absorption in a positive way? How do they affect them in a negative way?

Chemistry
1 answer:
lora16 [44]3 years ago
4 0

Answer:

pollution and waste every where like in are ouceans

Explanation:

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2 years ago
Which two subatomic particles do you add together to determine the atomic mass or mass # of the atom?
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Answer:

Protons and Neutrons

Explanation:

The sum of number of protons and the number of neutrons is equal to the mass of an element. Mathematically, it can be given as :

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4 0
4 years ago
If a substance has a half life of 58 years and starts with 500 g radioactive, how much remains radioactive after 30 years?
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Answer:

A = 349 g.

Explanation:

Hello there!

In this case, since the radioactive decay kinetic model is based on the first-order kinetics whose integrated rate law is:

A=Ao*exp(-kt)

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k=\frac{ln(2)}{t_{1/2}} =\frac{ln(2)}{58year}=0.012year^{-1}

Therefore, we can next plug in the rate constant, elapsed time and initial mass of the radioactive to obtain:

A=500g*exp(-0.012year^{-1} *30year)\\\\A=349g

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