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
Nat2105 [25]
3 years ago
6

A laboratory technician needs to make a 63-liter batch of a 20% acid solution How can the laboratory technician combine a batch

of an acid solution that is pure acid with another that is 10% to get the desired concentration?
Mathematics
2 answers:
Gre4nikov [31]3 years ago
6 0
Let x be the volume (liters) of pure (at 100%) acid needed
Let y be the volume (liters) of the other acid (at 10%) needed 
The final solution will be:
a) x+ y = 63 liters, AND their respective concentration in acid: is
100% x & 10% :y that will generate 63 liters at 20%
b) x +0.1 y = 63x 0.2 = 12.6

Let's solve this system of 2 equations:

x + y =63
x + 0.1 y = 12.6

Solving it will give you:

x= 7 liters at 100%
y = 56 liters at 10%
Vanyuwa [196]3 years ago
6 0

(63-x)= amount of 10% solution wanted

0.10(63-x) + x =0.20(63) =

6.3-0.1x+x=12.6

0.9x=6.3

X=7

63-7 = 56 liters

Check:

0.10(56) +7 = 0.2(63)

12.6 = 12.6


You might be interested in
Hard one wat is 500-45=<br><br><br>good luck​
aksik [14]

Answer:

EASY the awnser is about 15

8 0
3 years ago
Read 2 more answers
2/3 * (-3) h SD j ni djndjifnr​
Eddi Din [679]
2/3 x (-3)
-2/3 x3
= -2
5 0
3 years ago
Use the distributive property to find two expressions that are equivalent to 7(3x - 4)
ehidna [41]
I could only figure out one... sorry! Good luck

The answer is: 21x-28
7 0
3 years ago
The perimeters of the square and the triangle shown below are equal. What is the value of x?
Rudiy27
Perimeter is the sum of all the sides. So we can set up an equation:

\sf 3x+1+3x+1+3x+1+3x+1=2x+8+x+8+4x+2

Now solve for 'x', combine like terms:

When it comes to terms with variables it's just like normal addition but we keep the variable:

\sf 3x+3x+3x+3x=12x
\sf 2x+x+4x=7x

So we have:

\sf 12x+1+1+1+1=7x+8+8+2

Add:

\sf 12x+4=7x+18

Subtract 7x to both sides:

\sf 5x+4=18

Subtract 4 to both sides:

\sf 5x=14

Divide 5 to both sides:

\boxed{\sf x=2.8}
8 0
3 years ago
Which equation best matches the graph shown below ?
Shalnov [3]
Pretty sure it’s the bottom right option
8 0
3 years ago
Other questions:
  • It is legal to write a check when your account does not have funds to cover it.
    9·2 answers
  • Which best describes the solution for this equation 0.5(4x+3)=5x-2.5
    9·2 answers
  • The area of this circle is 72 (3.14) m squared what is the area of a 45 degree sector of this circle
    13·1 answer
  • A plant grows at a constant rate. Lokesh records the height of the plant each
    12·1 answer
  • Find the 35th term in the arithmetic sequence nce; 10,-14,-18,-22,..
    7·1 answer
  • 3.
    11·1 answer
  • At a rugby match,the ratio of children to adults us 2:3. there are 80 children in the crowd. each adult ticket costs £8. each ch
    6·1 answer
  • All vertical angles are congruent angles? ​
    13·2 answers
  • Use the two point (0,9) and (8,5) to write the equation in slope-intercept form.
    15·1 answer
  • Find the perimeter<br> simply Answer
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!