Scientists are often interested in knowing the
molar heat of combustion – the heat released
during the combustion of one mole of a
substance. Use the Periodic Table to find molar
masses
How many moles of ethanol are present in the
sample?
mol

Ibelieve the answer 4 moles

  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

The nationalists army held a higher advantage because of the ammount of men in the army. outnumbered them up to 3 over 1.