To find the mole of a substance, you take the mass divided by the molar mass of that substance~
A mole of CO2 = 2 moles of O2
8 CO moles x 2 =
16 moles
Molarity= moles/liter, so you would need 3mol KBr/1 liter
(0.3M)(1L)= 0.3mol KBr
Mole ratio for the reaction is 1:1
no of moles in NaOH that reacted= 1*21.17/1000=0.02117mols
molarity of HCl=0.02117*10/1000
=2.117M
