bromine? How many different variants were there?
well..it depends on the mole ratio..
for example, in my paper, it was 0.08 moles of silicon reacts with 7.2g of fluorine, the equation given was
Si + 2F2 ----> SiF4
so, silicon and fluorine are in the mole ratio 1:2
the moles of fluorine given is 7.2/(19x2) = 7.2/38 = 0.189 moles....(we use 38, cuz its diatomic, so we take double the original Ar
so that means, if fluorine is 0.189 moles, then according to the mole ratio, silicon should be 0.189/2 = 0.095 moles...but it is 0.08..meaning, silicon is limiting..
I took the mole ratio(1:2)
so if silicon was 0.08 then fluorine needed was 0.16(0.08x2) which is 0.16x38g(6.08g)
but there was 7.2g, much more than required ans so silicon limiting reagent
different approach but yeah same ans