The diagram below shows a group of water molecules.

Water is shown as an upper O with superscript delta minus, bonded below left and right to upper H atoms with superscripts delta plus. The right H is bonded with a dotted line to the O in an identical atom below to the right. The right H of the second molecule is bonded with a dotted line to the O of a third molecule, which is reversed top to bottom from the other two.

The water molecules in the diagram are attracted to each other by
ionic bonds.
hydrogen bonds.
London dispersion forces.
dipole-induced dipole interactions.

1.solid

2.carbon dioxide

3.helium

c8h10 is your answerr

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