Earths seasons in Northern Hemisphere: Choose ALL that apply. (Hey guys, sorry to bother but I have a headache and can't think of the answers. Please help..) Question 4 options:

More concentrated sunlight makes for cooler temperatures

The summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.

The atmosphere absorbs some of the sun's rays

The tilt and revolution of the earth as it moves around the sun cause the different seasons of the year.

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

answer carbon and three oxygen atoms;