Answer
$$0.125 \space mg \space Levsin = 1 \space mL \space of \space solution$$
$$\frac{0.125 \space mg \space Levsin }{1 \space mL \space of \space solution} \space and \space \frac{1 \space mL \space of \space solution}{0.125 \space mg \space Levsin }$$
- The $0.125$ mg is measured. It has three significant figures. The 1 in 1 mL is exact.
Work Step by Step
1. Write the equality:
$$0.125 \space mg \space Levsin = 1 \space mL \space of \space solution$$
2. Write the corresponding conversion factors:
- Create two fractions with the values of the equality in it. The "equal" symbol separates the divisor and the dividend.
$$\frac{0.125 \space mg \space Levsin }{1 \space mL \space of \space solution} \space and \space \frac{1 \space mL \space of \space solution}{0.125 \space mg \space Levsin }$$
- The $0.125$ mg is measured. It has three significant figures. The 1 in 1 mL is exact.
** Hint: Follow the Sample Problem 2.8 example to determine if the number is exact or measured.
