Amy walks 3 m from her desk to the teacher's desk. From the teachers desk, she then walks 4 m in the opposite direction to the classroom door. Which
table correctly represents both the distance and displacement of Amy's
motion?
Teacher's
Amy's
desk
desk
Distance
Displacement
O
A.
7 m
1 m to the left
Distance
Displacement
B.
7 m
7 m to the left
Distance
Displacement
O
C.
1 m
7 m to the left
Distance
Displacement
D.
1 m
1 m to the left

i think a, hope it .

explanation:

the correct answer is:

a. formation of precipitation

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; capital earns interest; entrepreneurship receives a profit or incurs a loss;