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a) First sweet you pick will be soft centred in 7 out of 11 cases, so the probability is 7/11when you are picking up a second sweet there are only 6 hard centred left and a total of 10, so the probability...

The molecule is 'trigonal planar'.This is because the central atom, boron, is attached to three fluorine atoms, and each fluorine atom repels the other fluorine atoms as much as possible. The only configu...

First find 10% which is £55Next find 1% which is 55/10 = £5.50As 12% = 10% + 1% + 1%,12%= £55 + £5.5+ £5.5= £66

In 1 there are 3 thirds so in 9 there will be 3x9 thirds which is 27 thirds.

First we need to find two numbers that multiply to make ac and add to make b which are -6 and 5 in this case.The two numbers that do this are 6 and -1. Now we separate the 5x into 6x and -x. Putting this ...