Which is true regarding covalent substances placed in water?

a. covalent substances conduct electricity very well in water.
b. the molecules aren't separated from one another by water molecules.
c. covalent substances don't dissociate into charged particles.
d. the solute particles in the covalent substances are able to overcome the attractive forces between the solvent and the solute.

the answer is 0.8m.

by: nicholas

is there any options? maybe im just not seeing them but i need the options to

-love shrooms

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