An exothermic reaction is a chemical reaction that releases energy through light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy.
The answer is D. M<span>arine fossils at elevations high above sea level :)</span>
Answer:
The rate constant at 84.8°C is
Explanation:
Taking the Arrhenius equation we have:
Where is the rate constant at a temperature 2, is the rate constant at a temperature 1; is the temperature 1, is the temperature 2, R is the gas constant and is the activation energy.
Now, we need to solve the equation for , so we have:
Then we need to make sure that we are working with the same units, so:
And now we can replace the values into the equation:
To solve the ln we have to apply e in both sides of the equation, so we have:
Prokaryotes are usually unicellular - and so would not have tissue, organs or organ systems.Some prokaryotes are multicellular, and you could potentially say that they are a tissue (many similar cells working together to perform a task). However, no prokaryotes have organs or organ systems.
Answer:
Aluminium Can not rust (Can't rust also meaning <u>Corrode)</u>
Because it's surface is protected by aluminium Oxide which stops the metal below from coming in contact with the air (which contains Oxygen) Unlike rust, which can flake off the surface of iron and steel objects, the layer of aluminium oxide does not flake off.
<u>Corrode</u>
<u>destroy or damage (metal, stone, or other materials) slowly by chemical action.</u>
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