Which of the folio rock formation processes in NOT matched correctly? A) Melting & cooling = Ingenious rock formation
B) Heat & pressure = metamorphic rock formation
C) Magma cooling = metamorphic rock formation
D) sediments being deposited, compacted & cemented together = sedimentary rock formation
E) Weathering, erosion, deposition, compaction & cementation = sedimentary rock formation

I got e but you might want to wait for someone else to answer it just incase...

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