The ksp of calcium phosphate ca3(po4)2 is 1.3 × 10-32 at 25°c. what is the solubility of ca3(po4)2 in moles/liter in a 0.20 molar solution of na3po4?

a.
2.3 × 10-11 moles/liter
b.
4.3 × 10-13 moles/liter
c.
2.3 × 10-32 moles/liter
d.
1.3 × 10-32 moles/liter

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297