If we start with 1.000 g of strontium-90, 0.887 g will remain after 5.00 yr. This means that the half-life of strontium-90 is yr.

Visible light is located in the middle of the spectrum.

  the volume of  0.220 m k2s    solution  required  to  completely  react with 175 ml  of 0.115m co(no3)2  calculate the moles  of co(no3)2 =  molarity x volume/1000175 x0.115/1000= 0.02  moleswrite  the reacting  equationk2s(aq)  +  co(no3)2  = 2 kno3(aq)  + cos(s)by  use  of mole ratio between k2s to co(no3)2 which  is  1: 1 the moles of k2s is therefore = 175  x0.115/1000= 0.02  molesvolume = moles/molarity=0.02/0.22=0.09  ml  of k2s

I'd say your answer would be the sides of a metal pan become hot when the pan is placed on the stove burner

Im not sure but if i figure it out i’ll hello you