Molar mass of C6H8O6 = 176.14g 6.0g C6H8O6 x 1 mol/176.14g = 0.034mol C6H8O6 0.034mol C6H8O6 /0.100L = 0.34 mol/L C6H8O6 0.34 mol/L x 1L/1000mL x 1 mL/20 drops = 1.7 x 10-5 mol/drop. Anyone know what this means?

the answer is c i believe

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