In order to describe the velocity of an object, which three pieces of data are needed? question 4 options: the mass of the object in grams the speed at which the object traveled the pull of gravity on the object the distance traveled by the object the time taken to travel the direction of travel the mass of the object in grams the time taken to travel the acceleration of the object object the distance traveled by the object the force the object had on another object the mass of the object in grams

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