A Geiger-Müller counter, used to detect radioactivity, registers 14 units when exposed to a

radioactive isotope. What would the counter read, in

units, if that same isotope is detected 60 days later?

The half-life of the isotope is 30 days.

How many moles are in 43.9 l of oxygen

A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)