Drinking water is fluoridated by adding sodium fluoride in treated water. It is desirable to keep soluble fluoride at least 1 mg/L to prevent dental cavities. If treated water has calcium of 200 mg/L, will it be possible to keep soluble fluoride of 1 mg/L. Ksp for calcium fluoride (CaF2) is 3 x 10-11. Atomic weight: calcium: 40 g and fluoride 19 g.

i would say b

explanation:

but i think i would need more information than that

all eukaryotic cell have mitochondria : )

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.