Part a. isotonic saline solution, which has the same osomotic pressure as blood, can be prepared by dissolving 0.923 g of nacl in enough water to produce 100. ml of solution. what is the osmotic pressure of this solution at 25 ∘c? express your answer to three significant figures and include the appropriate units.
part b. osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. the osmotic pressures required for this process can be as high as 19.1 atm . what would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 27 ∘c ? express your answer to three significant figures and include the appropriate units.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

where are the choice options?

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