If Gallium-68 has a half-life of 68.3 minutes, how much of a 115 mg sample is left after 6 half-lives?
5 mg
1.8 mg
0.6 mg
none of the above

What is the number of moles in 15.0 g ash3?

What does the cell nucleus do or, how does it function?

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion