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
Romashka-Z-Leto [24]
2 years ago
10

A chemist is mixing two solutions, solution A and solution B. Solution A is 15% water and solution Bis 20% water. She already ha

s a
beaker with 10mL of solution A in it. How many mL of solution B must be added to the beaker in order to create a mixture that is 18%
water?
Mathematics
1 answer:
LiRa [457]2 years ago
4 0

Answer:

15 ml

Step-by-step explanation:

We are told

Solution A = 15% of water

Solution B = 20% of water

Let's assume, the entire solution = 100ml

We are told that in the beaker we have 10 ml of Solution A already

Mathematically,

100 ml = 15%

10 ml = X

100ml × X = 15 × 10

X = 150/ 100

X = 1.5%

Hence in the beaker, we have 1.5% of water from Solution A

We are asked to find how many ml of solution B must be added to make the solution have 18% of water

Let y = number of ml of solution B

Hence

10 ml × 15%(0.15) = 1.5 ml of water - Equation 1

y ml × 20%( 0.20) = 0.20y ml of water ...... Equation 2

Add up the above equation

10ml + y ml ×18% (0.18) = 1.5 + 0.20y

(10 + y)(0.18) = 1.5 + 0.20y

1.8 + 0.18y = 1.5 + 0.20y

Collect like terms

1.8 - 1.5  = 0.20y - 0.18y

0.3 = 0.02y

y = 0.3/0.02

y = 15ml                              

Therefore,15mL of solution B must be added to the beaker in order to create a mixture that is 18% water

                     

You might be interested in
HELP! 25 POINTS! I ONLY HAVE 3 MINS LEFT! BRAINLIEST FOR BEST ANSWER! GUARANTEED 5-RATING AND THANKS AS WELL! HELP PLEASE!
stiv31 [10]

Domain represents the possible x values for the function.

It is...

x≤-2 and x>2

answer: a,b,c,f

3 0
2 years ago
What is the answer 8s + 8 + 3st + 4s
Illusion [34]

Answer:

12s + 8 + 3st

Step-by-step explanation:

Combine like terms:

8s + 4s = 12s

8

3sr

6 0
2 years ago
Solve the system of equations 6x+3y=12 and 5x+y=7
Levart [38]
6x+3y = 12
Solving for x
3(2x+y)=12
2x+y=12/3
2x+y=4
2x=4-y
X=4-y/2
8 0
3 years ago
Read 2 more answers
Matt swam 225 yards in 5 minutes. If Matt swam at a constant rate, how fast did he swim in yards per minute?
inna [77]
5/5 = 1
225/5 = 45

45 yards per minute
3 0
2 years ago
Read 2 more answers
Whats the distance between the following points? -9,8 -3,2
xeze [42]

<em>So</em><em> </em><em>the</em><em> </em><em>right</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em>√</em><em>3</em><em>1</em><em>4</em><em> </em><em>units</em><em>.</em>

<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em>

<em>Hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>you</em>

<em>Good</em><em> </em><em>luck</em><em> </em><em>on</em><em> </em><em>your</em><em> </em><em>assignment</em>

8 0
2 years ago
Other questions:
  • Someone help me!! Pls
    8·1 answer
  • What is the measure of one interior angle of a regular polygon that has 40 sides?
    15·1 answer
  • What is the opposite of 6 on the number line
    10·1 answer
  • You have $30 to spend on gas for your vehicle this week. If gas costs $2.42 per gallon, how many gallons of gas can you buy? Rou
    6·1 answer
  • Omar had 7 goldfish in his tank. He has 3 fewer redfish than goldfish in his tank. Omar also has 8 more black fish than goldfish
    13·2 answers
  • Please help :((( will mark brainliest !
    10·1 answer
  • How much does each fruit cost?
    12·1 answer
  • 2.The marked price of television is Rs2000.If 13 percentage tax was levied, after allowing 10 percentage discount, find the fina
    6·1 answer
  • Part 1 out of 2
    10·1 answer
  • Find the perimeter of the polygon with the given vertices. Round your answer to the nearest hundredth.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!