Answer
The pharmacist must prepare 110 g of ointment.
Work Step by Step
1. Identify the conversion factors.
- We need to convert from "oz" to "g".
Looking to the table 2.7 (Page 38), we can see that:
$454$ $g = 1$ $lb$
and
$1$ $lb = 16$ $oz$
Therefore: $454 $ $g = 16 $ $oz$
2. Calculate the value in grams, using the conversion factor:
$4.0 $ $oz \times \frac{454g}{16oz} = 113.5g$
3. Adjust the number to the correct number of significant figures.
- The used number that has the fewest number of significant figures is "4.0", with 2. Therefore, the result of the multiplication must have 2 SFs.
$113.5$ $g = 110$ $g$
