What is the chemical formula for compounds containing one zinc atom for every two bromine atoms?

The elements present in the compound is represented by the set of chemical symbols with subscripts where subscripts represents the number of atoms present in the compound, is known as chemical formula.

The chemical symbol for zinc is and for bromine is .

The given compound is composed of one zinc atom for every two bromine atoms. The subscript for zinc () is 1 for zinc atom and for bromine () is 2 for bromine atom. Thus, the chemical formula is .

Hence, chemical formula for compounds containing one zinc atom for every two bromine atoms is .

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2