Georgina wants to make a 42% citric acid solution. if she has 0.5 liters of water, how many liters of a 49% citric acid solution should she add?

Georgina should add 3 liters of 49% citric acid solution.

Step-by-step explanation:

let x be the liters of 49% solution that Georgina should add. Then after she has added 0.5 liters of water, the total liters of solution she has will be

and 42% of this should be the solute:

and since adding water does not add any solvent, this amount must come from the 49% citric acid solution; therefore

Solving for we get:

This the amount of 49% citric acid solution Georgina must add.

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

12

step-by-step explanation: