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
Dean used a triple beam balance to find that the mass of a rock was 40 g and he used a graduate cylinder that measures the volum
zhenek [66]

Answer:

Never bwa hahaha JK try d

Step-by-step explanation:

4 0
3 years ago
Write the ratio as a fraction in lowest terms. Be sure to make necessary conversions:
agasfer [191]

Answer:12533

Step-by-step explanation:

4 0
2 years ago
Mary is getting up a fence for her square garden.The garden has an area of 100 square feet.How long will each side of fence have
saw5 [17]
It would be 25 feet 25x4= 100
7 0
3 years ago
Determine the graph of the equation y=20(0.8)^x/3.
otez555 [7]

Answer: it is the 4th graph

Step-by-step explanation:

(-3,25)(0,20)(3,16)(6,12.8)

3 0
2 years ago
Does the point (2 3 , 2) lie on the circle that is centered at the origin and contains the point (0, -4)? Why?
AnnyKZ [126]
Consider this option:
1.the equation of the circle using its centre and point (0;-4) is:
x²+y²=4.
2. to substitute given point (23;2) into the equation of the circle:
23²+2²≠4

answer: this point does not belongs to the circle.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Pre-orders for the yearbook cost $38 each and full price cost $45 each. If 24 students in Mr. Hillman's class purchased yearbook
    6·1 answer
  • Need Help ASAP. Thank You.
    9·1 answer
  • If f (x) = StartRoot x minus 3 EndRoot, which inequality can be used to find the domain of f(x)?
    8·2 answers
  • Compare 1third of thirty or I fifth of 50​
    10·1 answer
  • a dress pattern reqiures 3/18 yards of fabric. jody wants to make matting dresses for the girls in her sewing club so she purcha
    13·2 answers
  • Half of a number,increased by 4,is 18, what is that number
    5·2 answers
  • 1. A community swimming pool is 7 yards 4.79 feet wide. How wide is the pool in meters and centimeters?
    8·1 answer
  • In the year 2005, the average cost of a car could be modeled by the equation C= -15x^2 + 20x - 3 where x is the number of years
    12·1 answer
  • What is 1/7 + 2/7 =
    6·2 answers
  • I need help please I am not good at math I'm going to read it ​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!