Because just like compounds, the table of chemicals can be looked at as having all the different pieces of it. So the different chemicals are the different "elements" to the periodic table.
Answer:
HELP ASAP!! Evaluate the extent to which the United States government and people have reconciled social, economic, and political disparities with regards to the nation’s founding principles.
7.5x10^14 Hz. I just worked it out on paper.
Answer:

Explanation:
Hello,
In this case, the increase in the temperature involves the addition of heat that is defined in terms of mass, heat capacity and temperature:

In this case, the heat capacity of iron is 0.450 J/(g*K), thus the heat results:

In such a way, since the temperature is increased heat is added, that is why it is positive.
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