How many moles is 11 grams of H2O
Answer to the nearest 0.01 moles.

0.61 moles

Explanation:

Find the molecular mass of 1 mole of water:

1 mole H2O = H= 1×2=2 + O= 16 = 18

? = 11g

Then cross multiply:

11×1= 11

11÷18= 0.6111111111

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