Theresa Morgan, a chemist, has a 30% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each should she mix to get 420 liters of a hydrochloric acid solution with a 45% acid concentration? liters of 30% hydrochloric acid solution . liters of 50% hydrochloric acid solution .

Question

gotchashot1 gotchashot1

07-06-2018
Mathematics

contestada

Theresa Morgan, a chemist, has a 30% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each should she mix to get 420 liters of a hydrochloric acid solution with a 45% acid concentration? liters of 30% hydrochloric acid solution . liters of 50% hydrochloric acid solution .

Respuesta :

Otras preguntas

War 2 by Angela Johnson 2000s what do lines 9-10 reveal about the speker

Un automóvil de 1000 kg toma una curva en una carretera plana de 50 metros de radio con una rapidez de 50 km/h. ¿el automóvil seguirá la curva o derrapara? se s

When and where will the next total solar eclipse be visible after 2024?

luna walks at 3 miles per hour and runs at 4 miles per hour if y= hours walking and x= hours running and her exercise route is at least 6 miles write an inequal

The mean age of the singers in a children's choir is 13.2 years. A 6-year-oldjoins the choir. Which sentence is true?A. The mean age is still 13.2 years.OB. The

Question 7 of 10When we use media, we:A. often contribute to them.B. never use them to relax.C. are completely passive.D. cannot connect with others.SUB

assist me with geomtry

After World War II, what two nations emerged as world superpowers with more industrial and military strength than other countries?

Explain 4 occasions that bond the various groups

With reference to the practical part of the test . Why do you have to fip a coin to determine which allele each parent would pass on to the offspring

sqdancefan sqdancefan · Answer 1 · 2018-06-09T21:10:14+02:00

Let x represent the number of liters of 50% acid Theresa puts into the mix. The the number of liters of 30% acid will be (420-x). The total amount of acid in the final solution will be ...
0.50x + 0.30(420-x) = 0.45(420)
0.20x + 126 = 189 . . . . . . . . . . . . . . . simplify
0.20x = 63 . . . . . . . . . . . . . . . . . . . . . subtract 126
x = 63/0.20 = 315 . . . . . . . . . . . . . . . liters of 50% solution
(420-x) = 420-315 = 105 . . . . . . . . . liters of 30% solution

Theresa should mix ...
105 liters of 30% solution
315 liters of 50% solution