If melted butter were poured into a glass of milk and allowed to rest, two distinct layers would be visible. how would these layers appear?
a.
the melted butter would lie above the layer of milk because butter is less dense than milk.
b.
the melted butter would lie above the layer of milk because milk is less dense than butter.
c.
the milk would lie above the layer of melted butter because butter is less dense than milk.
d.
the milk would lie above the layer of melted butter because milk is less dense than butter.

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

answerlinnaeus;