A sample of Halfnium- 156 decays for .1 seconds, If the half life of Halfnium-156 is 2.5 X 10-2, how many half- lifes has it gone through?

Where are each of the three particles located within the atom?

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?