Azelastine hydrochloride is an antihistamine nasal spray. A standard size container holds one fluid ounce (oz.) of the liquid

azelastine
hydrochloride

#1

Azelastine hydrochloride is an antihistamine nasal spray. A standard size container holds one fluid ounce (oz.) of the liquid. You are searching for this medication in a European drugstore and are asked how many milliliters (mL) there are in one fluid ounce. Using the following conversion factors, determine the number of milliliters in a volume of 2.41 fluid ounces: 1 gallon (gal) = 128 oz., 3.785 x 10-3 cubic meters (m3) = 1 gal, 1 mL = 10-6 m3.

Answer:

1 gallon (gal) = 128 oz.
so, 1 oz. = (1/128) gal
= 0.0078125 gal

3.785 x 10-3 cubic meters (m3) = 1 gal
so, 0.0078125 gal = (3.785 * 0.001)(0.0078125) m3
= 0.00002957 m3

1 mL = 10-6 m3
0.00002957 m3 = (0.00002957/0.000001) ml
= 29.57 ml

so, there are 29.57 ml in one fluid ounce. (ans)
and, number of milliliters in a volume of 2.41 fluid ounces = (2.41 * 29.57) ml
= 71.26 ml (ans)