60. The label on a box of cereal gives the mass of cereal in two units: 978 grams and
    34.5 oz . Use this information to find a conversion factor between the English and metric
    units. How many significant figures can you justify in your conversion factor?

To find a conversion factor between grams and ounces, you can use the relationship given by the label: 978 grams is equivalent to 34.5 ounces. Therefore, the conversion factor can be established as follows: 1 ounce = 978 grams / 34.5 ounces, which simplifies to approximately 28.4 grams per ounce. In terms of significant figures, since the number “34.5 ounces” has three significant figures, your conversion factor retains three significant figures as well, making it a reliable reference for future calculations.

When practicing conversion, a common mistake is neglecting to adjust for significant figures throughout the process. When using the conversion factor, ensure to round your final answer to the least number of significant figures in the quantities you started with. In this case, if you were converting to ounces from a measurement with only two significant figures, remember to round your result accordingly!