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Prove algebraically that (2n + 1) to the power of 2 - (2n-1) is an even number

(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 brackets. To do t...
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Answered by Otiti O. • Maths tutor
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Explain which molecule has the highest boilng point HCL, water ot CH4?

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 be...
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Answered by Julia Ż. • Chemistry tutor
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Find the area between the curves C_1, C_2 and the lines x=0 and x=1, where C_1 is the curve y = x^2 and C_2 is the curve y = x^3.

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 0&lt...
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Answered by Monika K. • Maths tutor
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What is the conditional tense?

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 would g...
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Answered by Lucy W. • French tutor
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why does iodine have a higher boiling point than chlorine?

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, number...
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Answered by Lauren H. • Chemistry tutor
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