Element Y Is a Gas at room temperature
Is a Nonmetal and has no electrical
conductivity
Is completely unreactive and inert
Has an average atomic mass that is 3.33
times greater than the standard for atomic
mass(Carbon-12)

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

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