Recent content by jdoyle

Hi Meldraft, It looks so simple I don't know why I didn't do it that way. Thanks very much. John

Hi All, Can anyone walk me through this problem. This is from an old med school entry test. The answer is 81 but I can't work out how the x terms cancel. 3x(3x^ -1/3)^3 Thanks in advance John

Hi PFAdmin, Thanks very much. I had become so confused I couldn't see the wood for the trees. Your explanation is very clear. Thanks again. John

Can anyone help with the following question - see attachment. Answer C is correct. I have been told that it can be solved thus: As our compound contains carbon and hydrogen we need to calculate these masses and deduct them from 128 to give us the mass of the chlorine and bromine...

Hi ACut, Thanks. That was exactly what I was looking for. Best wishes John

Hi Mike, Thanks for your quick reply. I have uploaded the attachment again. I don't understand why it wasn't attached the first time as it was there when I checked the original post. Thanks ahgain. John

The question in the attachment is from an old entrance exam for medical school. The correct answer is B. I realize that if I assign a 'point value' to the levels of reactivity for each of the letters i.e. the more reactive the higher the number T = 1 Q = 2 M = 3 J = 4 and that if...