How many milligrams of sodium fluoride are in a 10 mL dose of a solution containing 0.044% sodium fluoride?

To find the amount of sodium fluoride in a 10 mL solution with a concentration of 0.044%, you first need to understand how to convert the percentage into a measurable amount.

The percentage concentration (w/v) of a solution means grams of solute per 100 mL of solution. Thus, a 0.044% solution contains 0.044 grams of sodium fluoride in 100 mL. To find out how much is in 1 mL, you divide 0.044 grams by 100 mL:

0.044 grams/100 mL = 0.00044 grams/mL.

Next, you multiply this amount by the volume of your solution, which is 10 mL:

0.00044 grams/mL × 10 mL = 0.0044 grams.

Now, to convert grams to milligrams (since there are 1,000 milligrams in a gram), you multiply by 1,000:

0.0044 grams × 1,000 mg/g = 4.4 mg.

Thus, in a 10 mL dose of a solution containing 0.044% sodium fluoride, there are 4.4 mg of sodium fluoride present.