To aid in the prevention of tooth decay, it is recommended that drinking water contain
1.10
ppm fluoride, F−.

How many grams of F− must be added to a cylindrical water reservoir having a diameter of
4.28
× 102 m and a depth of
21.07
m?

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules