Which of the following is an example of a model?

a) pv=nrt

b) a geographical map

c) a belief that aliens exist

d) all of the above

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

Ijust took the quiz. their is no coefficient needed. : )

4.49 gramshope that fren : )

  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