A sample of a compund made entirely from copper and oxygen was founf to have a total mass of 0.1431g. The mass of the copper om the compound eas found to be 0.1271g. (i)Calculate the mas of oxygen in the sample. (ii)Calculate the number of moles of oxygen in the sample. (iii) Use the mole ratio of copper to oxygen rounded off to the nearest whole nmber to determine both the formula and the molar mass of the compound.

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.