Convert 4.5 km to feet. (note: 2.54 cm = 1 in; 12 in = 1 ft) O 1.4 x 10-2 ft
O 1.8 x 10-3 ft
O 1,400 ft
O 1.5 x 104 ft
O 1.8 x 103 ft

14763.8

Explanation:

idk what the question is about

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