Carbon has a half life of 5730 years, how many years would it take a 4 g sample to
decay to .5 g

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration. what is the titrant volume? titrant analyte indicator titrant volume analyte concentration naoh ch3cooh phenophthalein select one: a. 20.0 ml b. 27.0 ml c. 30.0 ml d. 24.0 ml

Can someone me with questions 15 to 17 plz.

An experimental procedure requires a 10 ml of acid to be dissolved