How many moles of HCl are there in 15.0 mL of a solution with a concentration of 0.450 M?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

What is the solubility of substance?

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg