1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pav-90 [236]
3 years ago
10

How much pure water must be mixed with 10 liters of a 25% acid solution to reduce it to a 10% acid solution?

Mathematics
1 answer:
elena-s [515]3 years ago
8 0

Suppose you add x liters of pure water to the 10 L of 25% acid solution. The new solution's volume is x + 10 L. Each L of pure water contributes no acid, while the starting solution contains 2.5 L of acid. So in the new solution, you end up with a concentration of (2.5 L)/(x + 10 L), and you want this concentration to be 10%. So we have

\dfrac{2.5}{x+10}=0.1\implies25=x+10\implies x=15

and so you would need to add 15 L of pure water to get the desired concentration of acid.

You might be interested in
Red bricks and grey bricks were used to build a decorative wall. The number of red bricks divided by number of grey bricks was 5
azamat
Red bricks : Grey bricks
        5        :            2

Total parts = 5 + 2 = 7

7 parts = 224
-----------------------
Find 1 part:
-----------------------
1 part = 234 ÷ 7
1 part = 32

-----------------------
Find 5 parts:
-----------------------
5 parts = 32 x 5 
5 parts = 160

----------------------------------------------
Answer: 160 Red bricks
----------------------------------------------
5 0
3 years ago
Pls help :)<br> What x what x what = 9 2/5
anyanavicka [17]

Answer:

1.5326

Step-by-step explanation:

there is no more simplification it can only be calculated by a calculator

8 0
2 years ago
Read 2 more answers
Find the area of the trapezoid.<br> Answer options: 8sqrt2, 4sqrt3, 12.0, 16sqrt2
Elis [28]

Answer:

=  8sqrt2

Step-by-step explanation:

Area of a trapezium is given by the formula;

1/2(a+b)h ;

Where a and b are the parallel sides and h is the perpendicular height.

a = 3 cm, b= 5 cm

To get; h, we use the Pythagoras theorem;

h² = 3² - 1²

   h² = 8

h = √8

  = √4√2

 = 2√2

Thus;

Area = 1/2(3 +5) 2√2

         = 1/2 ×8 × 2√2

       <u>  = 8√2 cm² or  8sqrt2 cm²</u>

8 0
3 years ago
Disregard anything that is already answered I was guessing. I really need help.
iris [78.8K]

i tjibk ut would be anthung weit wgat us thrs

6 0
3 years ago
Look at the diagram and answer the question. i’ll give brainliest.
Bad White [126]
Whoever worded question made tha shi so confusing
7 0
3 years ago
Read 2 more answers
Other questions:
  • 6231 rounded to the nearest thousand is. Enter your answer without<br> commas.
    15·1 answer
  • In the general linear equation, y = bx + a, what is the value of b called?
    13·1 answer
  • If 8x−4y=20 and 4x−8y=4, what is the value of x−y?
    11·1 answer
  • What is the X intercept of 5x + 2y = 6
    11·1 answer
  • The sides of a triangle are in the ratio 3:4:5. What is the length of each side if the perimeter of
    14·1 answer
  • In rolling one die, give the probability a number less than 4 will show.
    7·1 answer
  • First person to answer correctly get marked brainly
    8·2 answers
  • Complete the congruent statement
    8·1 answer
  • I need help please. ​
    6·1 answer
  • 2. What is different about multiplying whole numbers and decimals?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!