Calculate the number of grams of cl2 formed when 0.115 mol hcl react with o2-

The   number  of  grams  of Cl2   formed  when  0.115  moles  of  HCl   react   with  O2  is  calculated  as  follows

write  the  chemical  equation

4HCl  + O2  >  2H2O  +  2Cl2

if  0.115  moles  of  HCl  reacted  and from  the  equation  above  the  reacting  ratio  between   HCl  and  Cl2  is  4:2  therefore  the  moles  of Cl2=  0.115  x2/4=0.0575moles

mass  of  Cl2=  moles  x molar  mass  of  Cl2(35.5  x2=71g/mol)

=0.0575  moles  x71g/mol  = 4.0825  grams

It changes food into energy that the organism can use.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts