A current theory states during Earth’s formation, it was struck by a planet approximately the same size as Mars. Select the following effects of the impact. (Select 3) A) Debris from the impact coalesced to form the moon.

B) The Earth gained mass from the impact.

C) The impact caused the surface of the Earth to melt.

D) The impact caused the Earth to slow its rotation.

the earth gained mass from the impact :)

welcome

um i think it might be a car?

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