A small cartridge for pumping up a bicycle tyre holds 16 g of carbon dioxide…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A small cartridge for pumping up a bicycle tyre holds g of carbon dioxide. The molar mass of carbon dioxide is g/mol. How many moles is that, and how many molecules?
Need a reminder? The key ideaShow
One mole holds particles, and . In a gas each molecule has a volume , and the average spacing is its cube root. In a liquid the volume for each molecule is .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. g, g/mol, per mole.
Step 1. Moles. .
Step 2. Molecules. .
Answer: mol, or molecules.
Check. Less than half a mole, so fewer than half of . It fits.
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