What is the molarity of 2 mol of KI dissolved in 1 L water? A. 1 M
B. 3M
C. 0.5 M
D. 2 M

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

i believe the answer is a.

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

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