Original post by danr2
is this gcse or igcse?
AS level
Original post by Pigster
What can't you do?
You only need n = m / Ar
You only need n = m / Ar
But it wants you the work out the percentage by mass?
Original post by Pigster
Work out what mass of silver is in the coin, then work that out as a percentage of the mass of the coin.
Which I can't do...
The mass bit I can't do the percentage
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