1 Fundamentals of Chemises
Seit-Assessment Exercise 1 10
1. Aspirin is a compound that contains carbon, hydrogen and oxygen. It is used as a
painkiller. An aspirin tablet contains 1.25 x 1030 molecules. How many moles of this
compound are present in the tablet?
2. A method used to prevent rusting in ships and underground pipelines involves connecting
the iron to a block of a more active metal such as magnesium. This method is called
cathodic protection. How many moles of magnesium are present in 1 billion (1 x 10
atoms of magnesium.
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