ill try to . no promises tho.
the answer is 1260
you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.
7*5*36= 1260 it's all about multiplying
water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.
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