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Whitepunk [10]
4 years ago
15

I WILL GIVE BRAINLIEST!!!!!!!

Chemistry
2 answers:
wariber [46]4 years ago
8 0

coal is the most consumed

alexandr402 [8]4 years ago
3 0
It’s A) Petroleum. It accounts for almost 40% of US energy.
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A friend tells you that plants grow and gain mass only because of the nutrients they pull out of the soil. It this statement tru
Nutka1998 [239]
The statement that the friend made is not true. most of the mass of the plant is from carbon. the carbon comes from carbon dioxide which is used during photosynthesis. the left over carbon from photosynthesis is used to to help the plant gain mass. there is a process for this which is called cellular respiration
5 0
4 years ago
Which statement is true about trends shown on the electromagnetic scale.
lawyer [7]
Remember that <span>λ, or wavelength, is proportional to (1/f), where f=frequency. That means that wavelength and frequency are inversely related. When one goes up, the other goes down, and vice versa. That means answers C and D are incorrect because those answers have wavelength and frequency in a direct relationship.

Radiant energy is directly proportional to frequency. When frequency increases, radiant energy increases. That means A) </span><span>As wavelength decreases, radiant energy and frequency increase is the correct answer.</span>
6 0
3 years ago
Read 2 more answers
Q4-P1 is 1.00atm and V1 is 3.00L. We've now changed the volume so V2 is 1.70L. Use Boyle's Law, how much is P2? *Round your answ
Sliva [168]
Answer: 1.77


Explanation
6 0
4 years ago
Which is a substance that could be found in air, water or soil that is harmful to humans or animals?
tatyana61 [14]
Hello!

A substance that could be found in air, water or soil that is harmful to humans or animals is a Pollutant.

The other substances cannot be found in air, water or soil. Fossil fuels can only be found in soil, smog can only be found in the air, and carbon dioxide can be found in the water or air. 

Pollutants 
are substances that have harmful effects and damage the environment.  Some examples of pollutants are Carbon Monoxide (air), Lead (soil) and Insecticides (water). 

Have a nice day!
6 0
3 years ago
The rate law for the reaction NH4(aq)+ + NO2(aq)- → H2O(l) + NO2(g) is rate = k [NH4+][NO2-], and the value of k is 2.7*10-4 M-1
dybincka [34]
We are given the rate law, so we can substitute the given values for the rate constant and the concentrations of the reactants to solve for the rate of reaction. Since rate = k [NH4+][NO2-]:
rate = (2.7 x 10^-4 / M-s)(0.050 M)(0.25 M) = 3.375 x 10^-6 M/s
8 0
3 years ago
Read 2 more answers
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