A lab technician has 40 gallons of a 15% iodine solution. How many

gallons of a 40% iodine solution must he add to make a 20% iodine solution?


Please show work!!

Answers

Answer 1

The quantity of a 40% iodine solution that must be added to 40 gallons of a 15% iodine solution to make a 20% iodine solution is: 10 gallons.

According to the question;

We are required to determine how many gallons of a 40% iodine solution must he add to make a 20% iodine solution.

Let gallons of a 40% iodine solution to be added be; x gallons.

Therefore, the total gallons of a 20% iodine solution obtained is; (40+x) gallons.

By mass balance of iodine in each solution;

(15% of 40) + (40% of x) = (20% of (40 + x))

(0.15 × 40) + 0.4x = 0.2x + 8

0.2x = 2

x = 10 gallons.

In essence; 10 gallons of a 40% iodine solution must be added to make a 20% iodine solution.

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Related Questions

HELP I NEED AN ANSWER ASAP!! IM BEING TIMED!!

For this year‘s prom, 35/12 grade students and 28th 11th grade students voted on the theme. The segment take a bar graph below shows the distribution of responses.

Based on the segmented bar graph, does there appear to be an associates between grade level and prom theme?

A yes, there is a different number of students in each class.
B yes, it appears that the 12th grade students prefer the 1920s more than the 11th grade students, and prefer the beach party less.
C no, both distributions of student preferences have the same four categories.
D no, both distributions of student preferences have about the same preference for each of the prom themes.
E no, by the same number of students in each class. Preferred winter wonderland and masquerade ball as prom themes.

Answers

Answer:

B

Step-by-step explanation:

Logically and if you observe the graph closely ┐( ∵ )┌

The answer is yes, there appears to be an association between grade level and prom theme based on the segmented bar graph. The Option B is correct

Is there an association between grade level and prom theme?

The graph shows that 12th-grade students prefer the 1920s theme more than the 11th-grade students do, and they also have a lower preference for the beach party theme. This indicates a difference in preferences between the two grade levels for these specific prom themes.

This graph provide information on whether both distributions have the same four categories or whether they have the same preference for each of the prom themes, so, its indicate whether the number of students in each class is the same or not.

Read more about Graph

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A delivery company charges a flat rate of $3 for a large envelope plus an additional $0.25 per ounce for every ounce over a pound the package weighs. The postage for the package is $5.50. How much does the package weigh? (Hint: remember the first pound is included in the S3.)​

Answers

Answer:

1 pound 10 ounces

Step-by-step explanation:

5.50-3.00=2.50

2.50/0.25=10

Please Answer correctly

Answers

Answer:

I Think 2.

Step-by-step explanation:

If im correct pls give brainliest im tired thx! :D

[tex]\huge\fbox\orange{A} \huge\fbox\red{N}\huge\fbox\blue{S}\huge\fbox\green{W}\huge\fbox\gray{E}\huge\fbox\purple{R}[/tex]

[tex]\huge\underline\mathsf\colorbox{white}{2}[/tex]

[tex]\huge\underline\mathtt\colorbox{cyan}{I'm Sure}[/tex]

[tex]\huge\mathsf\colorbox{white}{}[/tex]

Home Find the slope of the roof of a home that rises 8 feet for every horizontal change of 24 feet.

Answers

Answer:

1/3

Step-by-step explanation:

to find slope

m=(vertical distance)/(horizontal distance)

m=8/24

m=1/3

please help!
-
-
-
-
-

Answers

The answer has to be in y-intercept form. Which is y=mx+b and b can also be neg. y=mx-b. The m is your slope and b is your y-intercept. So A’s slope counting from 3 on the y axis to 1 on the x-axis which is down 2 over 1 so it will be -2/1. And your y intercept is 3. The equation is y=-2x+3. For B its the same thing but no graph. Remember that slope is RISE over RUN. So since the number is on the bottom of the line the rise is 4 and the run is 1. So in this case 10 is your y-intercept. Which means you equation is y=4x+10.

Find the circumference of a wheel whose radius is 35cm. Find the distance covered in 60 seconds ,if it revolves 5 times per second​

Answers

Answer:

hey I hope this is clear

Step-by-step explanation:

what is the rate of change of the area of a circle with respect to the radius when the radius is r=3

Answers

Now the formula for the area of a circle is: πr². So we take 3 and just put it into the equation. π·3²=28.27. This is the area of the circle. Now the rate of change I think would just be the difference between the radius and the area of the circle so 28.27-3=25.27.

1) There are 44 dogwood trees currently in the park. Park workers will plant more
dogwood trees today. When the workers are finished there will bę 70
dogwood trees in the park. How many dogwood trees did the workers plant today?

Answers

Answer:

26

Step-by-step explanation:

there are already 44 dogwood trees

there will be 70 dogwood trees by the end of the day

we take how many dogwood trees there already are and subtract them from what there will be

70-44=26

120-20/10+2
help quick due in 10 min

Answers

[tex]120 - \frac{20}{10} + 2 \\ 120 - 2 + 2 \\ = 120[/tex]

Answer:

120

Step-by-step explanation:

120-20/10+2

=120-2+2

=120

Explain why the slope of line a is 2/6.

Answers

Answer:

The slope of a line is 2/6 because slope also means rise over run (y/x). So the line's slope is 2/6 because it goes up (rises) in the y-direction 2 units and moves to the right (runs) 6 units, from one point to another.

Step-by-step explanation:

Find the missing angles

Answers

Step-by-step explanation:

<3 = 47°, alternate angle.

<2 = 52° , alternate angle.

<5=180-47-52=81°, linear pair.

<1= 180-52=128°, alternate angle, linear pair.

<4= 180-47= 133°, alternate angle, linear pair.

hope this helps you.

please help don,t undertan

Answers

Answer:

substract.

Step-by-step explanation:

eg. 5 before 17 = 17-5

so 5 before 17= 12

same for others

Sau một thời gian sử dụng, một tủ sách nghệ thuật đã có dấu hiệu bị xuống cấp và
cần sửa lại (xem hình vẽ). Các ngăn BC, DE và FG gỗ bị
mục và cần thay mới. Chủ nhà sách cần 3 miếng ván sao
cho khớp với các vị trí này. Em hãy giúp chủ nhà sách
tính toán chiều dài các miếng ván này sao cho khớp với
các vị trí cần thay thế. Biết ngăn HI=12 dm. Tính chiều
dài các ngăn BC;DE;FG

Answers

Answer:

Step-by-step explanation:

WILL MARK BRAINLIEST

Answers

Step-by-step explanation:

Given:

x = 70y = 106

Find: Z to two decimal places

[tex] {a}^{2} + {b}^{2} = {c}^{2} \\ {x}^{2} + {z}^{2} = {y}^{2} \\ {70}^{2} + {z}^{2} = {106}^{2} \\ 4900 + {z}^{2} = 11236 \\ {z}^{2} = 11236 - 4900 = 6336 \\ z = \sqrt{6336} = 79.60[/tex]

7/8÷2/3= __
can i get only the answer

Answers

Answer:

21/16

Step-by-step explanation:

hope it hepls pa brainlest na din po

Answer:

in fraction= 1 5/16

in decimal = 1.3125

Can someone help me with this please!

Answers

Answer:

The correct answer would be A!

Answer:

Answer is A

Step-by-step explanation:

Hope it helps!

Please help !!! Aspen scored no fewer than 18 points in her
last basketball game. She scored 6 points on free
throws that are worth 1 point each. The rest of
the points she scored on 3-point field goals.
Which inequality can be used to
determine, p, the number of 3-point field
goals that Aspen made?

Answers

Inequalities are used to represent unequal expressions.

The inequality is: (c) [tex]\mathbf{3p + 6 \ge 18}[/tex]

The given parameter is:

[tex]\mathbf{Free = 6}[/tex]

Represent the number of 3-point field goals with p.

So, the total number of points is:

[tex]\mathbf{Total = 3 \times p + Free}[/tex]

[tex]\mathbf{Total = 3 p + Free}[/tex]

Substitute 6 for Free

[tex]\mathbf{Total = 3 p + 6}[/tex]

He scored no fewer than 18 points, means that:

He scored 18 or more points

So, the inequality is:

[tex]\mathbf{Total = 3 p + 6 \ge 18}[/tex]

Rewrite as:

[tex]\mathbf{3p + 6 \ge 18}[/tex]

Hence, the correct option is (c)

Read more about inequalities at:

https://brainly.com/question/11612965

helppppppppppppppp plsssssssssss

Answers

Answer:

y=5/1 - 3

Step-by-step explanation:

use rise over run

2 sss, aas, sas, or not enough information

Answers

Answer:

ASA

Step-by-step explanation:

there is one more angle, which is the vertical opposite.

Jim and his friends went out for dinner at a restaurant and the bill was $68.50 if Jim wants to tip 18% what should the tip be

Answers

Answer:

$12.33

Step-by-step explanation:

Since the bill is $68.50, and Jim wants to tip 18%, it will be $80.83 in total

18% = 0.18

since you don't want to DECREASE the bill, it's 1.18

1.18 x 68.5 = 80.83

hope this helped :)

Fill in the missing numbers to complete the division problem.​Enter your answers in the boxes.6,957\div 7=6,957÷7=Remainder:

Answers

Answer:

6

Step-by-step explanation:

why because when you work this out 6,957÷7 your answer will be 993.8571...

so you take the hole number of the decimal and multiply it by 7 the answer should be subtracted from 6,957

Hmm I’ve spent time on it… help pls anyone?

Answers

Assume all cookies were butter cookies.

25 x 15 = 375

543 - 375 = 168

27-15 = 12

168 / 12 = 14

She sold 14 chocolate cookies and 11 butter cookies.

EQUILATERAL

ISOSELES

SCALENE

Answers

Answer:

isoseles triangle

explanation: none of the sides are the same

hope this helps

Answer: SCALENE

Step-by-step explanation:

All sides are unequal, ISOSELES has 2 equal sides and EQUILATERAL all sides are equal.

19. What is the 6th term in the sequence below? 1, 3, 7, 15, 31, _, 127​

Answers

The 6th term in the sequence should be 63

Hi I need help with this

Answers

Answer:

well this is going to be long, but

1. 0.625

2. -0.136

3. 1.222

4. -5.075

5. -7.455

6. 4.067

7. -9.111

8. -7.833

9. 17/25

10. -1/100

11. -3 99/100

12. 8 149/200

13. 3 1/200

14. -13 3/250

15. -9 49/50

16. -10 113/250

17. your friends snapper is larger, 1320/156 > 1313/156

18. 0.13 > 1/8

19. -1 2/9 < 5/4

20. -5.175 < -5 1/6

21 -1 1/2 = -1.5, - 1 7/9 = -1.777777....

Step-by-step explanation:

sorry i didnt know which question you needed help on so i did it all, hope this helped you!! have a great day

the simple interest on $700 for 2 years at 10% is ?​

Answers

Answer:

140

Step-by-step explanation:

∫P=700

∫T=2

∫R=10% after a few calculating you get 140.....the answer is right just sorry for my bad explaining


10. If a + b = 10, what is the value of 2(a + b) + + + (a + b)2 – 4
11. The cost of a hamburger and a soft drink together is $2.23. The cost of 2 hamburgers and
3 soft drink together is $5.26 What is the cost of a soft drink? What is the cost of a burger?

Answers

Answer:

answer for 10th question is 121

Step-by-step explanation:

2(a+b)+a+b/2+(a+b)^2-4

=2(10)+10/2+(10)^2-4

=20+5+100-4

=125-4

=121

Answer:

10.  121      11.  Hamburger = $1.43

Step-by-step explanation:

2(a + b) + (a + b)/2 + (a + b)² - 4

2(10) + (10)/2 + (10)² - 4

20 + 5 + 100 - 4

25 + 100 - 4

125 - 4 = 121

11.   Let H = Hamburger and Soft Drink = D

          H + D = $2.23

      2 H + 3D = $5.26

H + D = $2.23        Solve for D

D = $2.23 - H        

2H + 3D = $5.26     Now substitute the value of H into the second equation.

2H + 3($ 2.23 - H) = $5.26

2H + $6.69 - 3H = $5.26

 -H + $6.69 = $5.26

 -H = - $1.43

  H = $1.43

 


Monday's low temperature was – 19" and its high was –7

Answers

Answer:

-19 degrees fahrenheit?? and -7 degrees celcius??

Step-by-step explanation:

Is each line parallel, perpendicular, or neither parallel nor perpendicular to the line 4x + 3y = 12? Drag and drop each choice into the boxes to correctly complete the table. Parallel Perpendicular Neither

Answers

Step-by-step explanation:

The line given:

4x + 3y = 12, its slope is m = - 4/3

Other lines to compare:

-3x + 4y = 8, the slope is m = 3/4, it is perpendicular line as the product of the slopes is  - 1;4x + 3y = 31, the slope is m = -4/3, same slope but different y- intercept, it is parallel line;3x + 4y = 12, the slope is m = -3/4, it is neither parallel nor perpendicular;-4x + 3y = - 1, the slope is m = 4/3, it is neither parallel nor perpendicular
4x+3y=123y=-4x+12y=-4/3x+12

Slope=m=+4/3

#1

-3x+4y=8

m=3/4

Perpendicular

#2

4x-3y=31

m=-4/3

Parallel

#3

3x+4y=12

m=-3/4

neither

#4

-4x+3y=-1

m=4/3

Neither

I need help with my Algebra 1 ugh plz help! Sorry there’s a typo

Answers

Answer:

x + 8 > 11

dot at 11 going to the right.