Today we talked about the mole. The mole is a unit of measurement used to determine the quantity of atoms and molecules. A mole is equal to 6.02 x 10^23. We then talked about how to calculate the percent composition of each element in a compound. This then was followed by calculating the empirical formula for a compound. The empirical formula of a compound is the bare bones lowest ratio of elements in a compound based on given data. There are 4 steps to finding the empirical formula they are:
- Percent to gram (assume 100 gram sample and your percent is your gram)
- Grams to moles (divide by the molar mass of the element found on the periodic table)
- Divide by smallest (use the smallest mole calculated to determine the ratio)
- Multiply til whole (if your ratio ends in .5 or .333 then multiply by 2 for .5 or 3 for .333. Remember to multiply all parts of ratio)
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