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(2n + 1) ² - (2n-1)can also be written be as (2n +1)(2n + 1) - (2n-1) Two brackets next to each other indicate that you must multiple them by each other, this is also known as expanding the bra...

HCl, due to chlorine electronegativity, is a polar molecule. This causes dipole-dipole interactions between molecules that need to be overcome for the molecules to boil. Water also has dipole interactions...

We start by drawing a diagram which illustrates the question. First draw the x-y plane and the two curves curve y = x^2 and y = x^3. Notice that the two curves intersect at x=0 and x=1, and in the range ...

The conditional tense is the French way of saying I "would do something". It's an action that would happen if a certain condition occurred. So, for example, in English you might say "i woul...

If we look at group 7 of the periodic table, we can see that iodine is below chlorine. The trend in going down a group in the periodic table is that the number of electron shells increases, therefore, num...