Lab 1

# Lab 1 - Nikka Ghalili Introduction U87705553 The main goal...

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Nikka Ghalili U87705553 Introduction: The main goal of this lab was to estimate the sizes of atoms and molecules in solids, liquids and gases and in the end also the Avogadro's number. This was done by measuring the different samples in the 3 phases and attaining their mass and volume and packing coefficient. With this information we were able to manipulate basic equations in order to calculate the sizes of the different atoms. Procedures: In the experiment, we first chose our 2 metal samples, which happened to be copper and lead. We then measured the mass and volume (which we did by the liquid displacement test) then used this information to calculate the other values required on Table 2 and hence we were able to attain the size of the individual molecules in both substances. We then proceeded to calculate the packing coefficient in solids. We did this by placing what seemed to be 10mL of lead shots into a cylinder tube, then filling the cylinder with water until the water was aligned with the lead shots. We took the volume of the water to be the volume of empty space and that is how we were able to get the packing coefficient. We then measured the mass and volume of a sample of water and by modifying a little the formula we used previously to calculate the size of molecules in solids, we were able to get the size of molecules in liquids. For the gas phase, we took a cylinder sample of dry ice and took its dimensions and calculated

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Lab 1 - Nikka Ghalili Introduction U87705553 The main goal...

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