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Check for any silly mistakes, a lost negative or a simple arithmetic error. If you can’t find any, we’ll work through the question together and see where the method differs from yours. Then we will work o...

Probability that Ria takes Green then Blue is 7/9 * 2/8 = 14/72. Probability that Ria takes Blue then Green is 2/9 * 7/8 = 14/72. Added together we get 28/72 = 7/18.

The -OH is an activating group, it donates its lone pair into the delocalised ring of electrons. This increases the electron density in the ring, making it more reactive.

3x^2 = 48 x^2 = 16 x = 4

We know the roots of the equation 3x² - 5x + 4 = 0 is P & Q, therefore is is equivalent to (x - P)(x - Q...