Which element is needed for
a. Bone and teeth formation.
b. Treatment of water.

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm