What volume does 0.067 moles of He gas occupy at STP?
show work please

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

May someone me with these science questions

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.