The following compounds are nonelectrolytes that are soluble in water. Which statement below is true of the colligative properties of these compounds? acetic acid CH3COOH
glycerol C3H5(OH)3
sucrose C12H22O11
urea CH4N2O

A. Glycerol would have the highest osmotic pressure because is highly viscous.
B. Acetic Acid would have the greatest boiling point of elevation because is an acid.
C. Sucrose would have the highest freezing-point of depression because it has the highest number of hydrogens.
D. Each compound would have the same colligative properties.
E. Sucrose would have the highest freezing-point of depression because it has the highest molar mass.

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

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