Fy What is the pre-image of vertex A' if the image shown
on the graph was created by a reflection across the y-
axis?
A
8
O (-8,-6)
0 (-6, 8)
(8,6)
O (6,-8)
-4
CH
B

SFZJHHKXC NHJNFGNI

Explanation:

HOPE THI HELPS

gnf,kgdj,dezkttkkrytkkttewj

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