Hi, really struggling at the moment, this is an AS level chemistry question on a sheet i have been given. Can anyone give me any advice on this please?
"Tin ore, known as cassiterite, contains an oxide of tin. This oxide contains 78.8% tin by mass. Calculate the empirical formula of this oxide. You must show your working"
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- Thread Starter
- 30-09-2011 18:37
- 30-09-2011 19:11
So if tin makes up 78.8% of the mass, oxygen must make up the remaining 21.2%.
Divide each percentage by the relative atomic mass, this will give you a ratio of elements in the compound. Find a way to convert these numbers to whole numbers
- 30-09-2011 20:00
And adding to post #2
If the numbers are relatively near to a whole number then you should just round it
Unless it's near to half, then double the numbers and you should get the answer too