Nonmetals Assignment Active
Choosing the Appropriate Property
A sample of iodine is easiest to ship as a powder because it is
v. making it easy to break into
small pieces.
Helium is less
than the elements that make up the air we breathe, so a balloon filled with
helium will float in air.
Plastic is a compound of nonmetallic elements, so its
properties make it a popular coating
for electric wires to prevent the current from escaping.

the ratio of the conjugate base to the acid required to attain the desired ph.

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