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Less invasive, not as big an operation, therefore there is less risk involved.Shorter recovery time, and so patient spends less time in hospital.Could also be: Doesn't need to use general anaesthetic. Les...

Each carbon atom in graphite forms 3 covalent bonds, which means there is one delocalised electron per carbon atom. These delocalised electrons can move through graphite and carry charge.

7 electrons.

Make the like terms equate by multiplying (1)*2 and (2)*3, ((1)*2) 24x+7y=64, ((2)*3) 24x+9y=72, Take one away from the other to remove the x term and solve for y, (24x+9y=72) - (24x+7y=64), 2y=8 y=4, Su...

Chemical reactions occur when reacting particles collide with energy equal to or greater than the activation energy. By increasing the concentration of reactants, there are more reacting particl...