If a flask containing one liter of water was poured into 1,000 small cubes, then each cube would contain:

Answer is: 1 mL or 1 cm³.

V(water) = 1 L; volume of the water.

One liter is equal to 1000 milliliters (mL) or 1000 cubic centimetres (1000 cm³).

V(water) = 1 L · 1000 mL/L.

V(water) = 1000 mL.

V(cube) = 1000 mL ÷ 1000.

V(cube) = 1 mL; volume of the cube.

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