The purpose of this lab was to identify a mystery substance in a plastic baggie given only the mass of the empty bag and the number of moles/particles. We determined the identity of the substance by first weighing the bag on the scale to find the total mass, and then subtracted the mass of the empty bag from that, which gave us the substance mass. Afterwards, we calculated the molar mass by dividing the substance mass (in grams) by the number of moles in the substance. For Set B, we were given the number of particles instead of moles, so we just converted it into moles and plugged that into the molar mass equation. Finally, we matched the calculated answer with one of the given possible compounds using the periodic table.
Bag A4 contained calcium carbonate, and bag B3 contained potassium sulfate.
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