Question 1.12: (a) Convert 0.75 lb to grams. (b) Convert 0.50 qt to decilit...

(a) Select the conversion factor from Worked Example 1.9 (b) so that the “lb” units cancel and “g” remains:

$0.75  \cancel{lb} \times \frac { 454 g}{ 1 \cancel{ lb}} = 340 g$

(b) In this, as in many problems, it is convenient to use more than one conversion factor. As long as the unwanted units cancel correctly, two or more conversion factors can be strung together in the same calculation. In this case, we can convert first between quarts and milliliters and then between milliliters and deciliters:

$0.50 \cancel{qt} \times \frac { 946.4  \cancel{mL}}{ 1 \cancel {qt}} \times  \frac { 1 dL}{ 100 \cancel{ mL} } = 4.7 dL$