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
iragen [17]
3 years ago
9

To reduce 16 ounces of a 25% solution of antiseptic to a 10% solution, how much distilled water should a nurse add?

Mathematics
1 answer:
yan [13]3 years ago
7 0

Answer:

24 ounces

Step-by-step explanation:

Here's a more intuitive approach to use here.

You know that your initial solution has a percent concentration, presumably volume by volume, of  

25

%

. This means that any volume of this solution contains  

1

part solute and  

3

parts solvent.

The target solution must have a concentration of  

10

%

, which means that any volume of this solution will contain  

1

part of solute and  

9

parts solvent.

Your starting solution has a volume of  

16

ounces, or  

4

parts, each with a volume of  

4

ounces.

In order to get to a solution that has a total of  

10

parts, you must add  

6

parts of solvent to the initial solution. Since we know that

1 part  

=

4 ounces

it follows that you must add

6

parts

⋅

4 ounces

1

part solvent

=

24 ounces

of distilled water, which is your solvent, to the initial solution.

The target solution will contain  

1

part solute and  

9

parts distilled water for a total of  

10

parts of solution, and hence have a percent concentration of  

10

%

.

You might be interested in
Plz can someone help me with number 5?
Anettt [7]

Answer:

77

Step-by-step explanation:Trust

7 0
3 years ago
In the city of Carmen, there is a drawbridge that is opened twice per hour over the summer. The graph below shows the number of
n200080 [17]

Answer:

1) Between 0 and 1 minute the rate of change is 25 ft./min

2) Between 1 and 2 minute the rate of change is 0 ft./min

3) Between 2 and 4 minute the rate of change is -12.5 ft./min

Step-by-step explanation:

1) Between 0, and 1 feet, we have;

The rate of change = (Final height - Initial height)/(Final time - Initial time)

The rate of change = (40 - 15)/(1 - 0) = 25 ft/min

Between 0 and 1 minute the rate of change = 25 ft./min

2) Between 1, and 2 feet, we have;

The rate of change = (40 - 40)/(2 - 1) = 0 ft/min

Between 1 and 2 minute the rate of change = 0 ft./min

3) Between 2, and 4 feet, we have;

The rate of change = (15 - 40)/(4 - 2) = -12.5 ft/min

Between 2 and 4 minute the rate of change = -12.5 ft./min

7 0
3 years ago
Which of the following angles is not coterminal with the other three?
jekas [21]

9514 1404 393

Answer:

  b.  17°

Step-by-step explanation:

All of the angles are 2nd-quadrant angles except 17°, which is a 1st-quadrant angle.

  17° is the odd angle

__

When you compute ...

  mod(angle, 360), you get 163, 17, 163, 163.

4 0
3 years ago
What is the area of a regular octagon with a apothem of 16 inches long and a side of 19 in Long round the answers to the nearest
azamat
To find the area of any regular (regular means all sides are = and all angles are =)  poylgon when you know the length of the apothem and the length of the side you can use the formula:
A = (1/2)ap where a = the length of the apothem and p = the perimeter of the polygon. You can also use n*s in place of p where n = the number of sides of the polygon and s = the length of the side.

A= (1/2)(16)(19*8) (An octagon has 8 sides.)
A = 1216 in^2
3 0
3 years ago
Read 2 more answers
For the standard normal probability distribution, the area to the right of the mean is:
sveticcg [70]
The answer is 0.5. I hope this is helpful.
7 0
3 years ago
Other questions:
  • Find the position function of a particle moving along a coordinate line that satisfies the given conditions. 2sint-cost
    12·1 answer
  • Evan has $4,000 that he wants to put into a saving account until he leaves dor college, which will be 6 years from now. How much
    13·1 answer
  • The graph shows the number of laps that kailee ran around a track over a given amount of time
    9·2 answers
  • Which of the following is equal to the rational expression when x ne2 or -4? (5(x - 2))/((x - 2)(x + 4))
    10·1 answer
  • Help I need to submit this ASAP​
    12·1 answer
  • The dolphin dives 20 feet below the surface of the ocean. What is the dolphins elevation in feet?
    11·1 answer
  • Please I need a step by step explanation ASAP.
    13·1 answer
  • What is ( 9 x 2/3 ) x 2/3
    14·1 answer
  • Which line on the graph below has a slope of zero <br><br><br> P Q R S
    9·1 answer
  • How can energy be used at night when the Sun is not shining?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!