The American Dental Association recommends that an adult female should consume 3.0mg of flouride per day to prevent tooth decay. If the flouride is consumed as sodium flouride (45.24% F)what amount of sodium flouride contains the recommended amount of flouride in mg?

3 mg F x (1 g/1000 mg) x (1 mol F/19.0g F) x (1 mol NaF/1 mol F) x (42 g NaF/1 mol NaF) = xx

Check my thinking and look carefully at each term I've used. I initially inverted some of them.

The answer above is in grams. You will need to convert it to mg. Also, check the atomic and molar masses.

To determine the amount of sodium fluoride that contains the recommended amount of fluoride, we need to calculate the quantity of sodium fluoride required to provide 3.0 mg of fluoride.

Since sodium fluoride contains 45.24% fluoride (F), it means that for every 100 grams of sodium fluoride, 45.24 grams would be fluoride.

To find the amount of sodium fluoride needed, we can set up a proportion:

(45.24 grams fluoride / 100 grams sodium fluoride) = (3.0 mg fluoride / x grams sodium fluoride)

Cross-multiplying, we get:

45.24 * x = 100 * 3.0

Simplifying the equation:

45.24x = 300

Dividing both sides of the equation by 45.24:

x = 300 / 45.24

Calculating this expression, we find:

x ≈ 6.63 grams

Therefore, the amount of sodium fluoride that contains the recommended amount of fluoride (3.0 mg) is approximately 6.63 grams.