They can form acids or ‘acid rain’ like nitric acid or sulfuric acid which can damage buildings and structures.
Don't ever return unused chemicals to their original containers. If you do, you could be
contaminating the chemical. Discard the leftover chemical in the correct waste
box. Ask your teacher if your not sure about what to do.
A star’s spectrum will change over time due to it being dependent on some properties in the photosphere such as :
<h3>What is a Star?</h3>
This refers to an astronomical object composed of hydrogen and helium and held together by gravity. As stars age or get older, changes occur but are very slow.
This is why most stars spend their lifetime in the main sequence but does't invalidate that they won't remain constant as their constituents also become used up with time.
This is therefore the reason why star’s spectrum will change over time as the most appropriate choice.
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Answer:
It's because of the presence of protons.
Explanation:
A nucleus of an atom has protons and neutrons. We know that a proton has a charge of
+
1
, while a neutron has no charge, or
0
. Therefore, the nucleus of an atom will always have a positive charge.
The average rate of reaction over a given interval can be calculated by taking the difference of concentration on a particular given reactant, and dividing it by the total time. In this case, (1.00 M - 0.655 M)/30 s = 0.0115 M/s, or 0.0115 mol/L-s, and this is the final rate of reaction.