I NEED HELP ASAP PLZZZZZZZZ 20 POINTS AND BRAINLY
A chemistry teacher needs to make a 42% sulphuric acid solution. The acid solutions available are 4 liters of 30% sulphuric acid and 50% sulphuric acid, by volume. How many liters of the 50% sulphuric acid solution must be mixed with the 4 liters in order to make the 42% sulphuric acid solution?

Answers

Answer 1

Answer:

4 liters of 30%  and 6 liters of 50% acid.

Step-by-step explanation:

Let the volume of 30% acid be x,  then the volume of 50% acid will be

(10 - x) liters.

So we have the equation:

0.30x  + 0.50(10 - x) = 0.42* 10

0.30x +  5 - 0.50x = 4.2

0.80 = 0.20x

x = 4  liters.

So we need 4 liters of 30% acid and 6 liters of 50% acid.


Related Questions

NEED HELP ASAP (please and thank you)

Answers

Answer:

800

Step-by-step explanation:

i dont know how to explain. i just did the math. hope this helps.

it wouldnt be 600 because thats 1/2 of 1200 not 2/3.  

Answer:800

i put it wrong at first but its 800

help me with this and get 10 point and bright if right.

Answers

Answer:

A

Step-by-step explanation:

As on X axis line touches the positive number so x will be a real number..after that on y axis the lines touching approximately to 1 or 2 so it mean y is less than or equal to 4

The answer is A...
I hope this helps!

I really need help with this...

Answers

b would be the answer i’m pretty sure , it said TWICE as many push ups so it would be 2x
b is the answer because twice as many push ups

I need help please..

Answers

Interest earned year 1: $140 Total: 2,140
Interest earned year 2: $149.8 Total: 2,289.8
Interest earned year 3: $160.29 Total: 2,450.09
Interest earned year 4: $171.51 Total: 2,621.6

This graph shows a proportional relationship between the amount of money in Jack’s savings account and the number of weeks Jack has been saving money.

Which statement identifies the correct slope, and the correct interpretation of the slope for this situation?

A
The slope of the line is 61 , so Jack is saving $6 per week.

B
The slope of the line is 61 , so Jack' is saving $1 for every 6 weeks.

C
The slope of the line is 16 , so Jack is saving $6 for every 1 week that passes.

D
The slope of the line is 16 , so Jack is savings $1 for every 6 weeks that passes.

Answers

I believe it is A. But I’m not exactly sure bc your answer choices don’t seem right. But if it says 6/1 then it should be correct.

The slope of the line is 6, which can be interpreted as Jack saving $6 per week. (Option A).

Recall:

Proportional relationship between two quantities can be given as: y = mx, where m = slope.

Slope (m) = y/x (of a graph that is proportional)

Given the proportional graph, using a point on the line, (5, 30):

Slope (m) = [tex]\frac{30}{5} = 6[/tex]

Therefore, the slope of the line is 6, which can be interpreted as Jack saving $6 per week. (Option A).

Learn more here:

https://brainly.com/question/6869319

The distance on a map between a student’s house and her job is 6 cm. On the same map, the distance between her house and her school 8 cm. The actual distance from her house to school is 12 km. If d represents the approximate distance in km between her house and her job, what is d?

A.4
B.9
C.48
D.16

Answers

Answer:it B I think

Step-by-step explanation:

I’m not sure though.

The answer is a)4
You get this answer because you need to find out how many km per cm, so you divide 12 by 8. This will get u the answer of how many km per cm. Then you multiply by six cm because this is the length on the map between home and her job. This will get you the answer 4.

Please help me I will give you the brain thing and extra points (image below) 4/5

Answers

A. 1 mile per minute

1 mile per minute

Step-by-step explanation:

you see in the time span from 15 to 20 minutes it is 5 minutes and he ran five miles in five minutes so he ran 1 mile per minute :)

20 POINTS AND GIVING BRIANLIEST !!!

Answers

it’s C i’m pretty sure

Answer:

good job

Step-by-step explanation:

After a while, Erin switched off the weather report and looked up the temperatures of different cities in old newspapers and magazines. One of the magazines showed temperatures for different times of a particular year. Based on the temperatures she saw for that year, was Boise warmer in April (6 3/4 F) or in May (6.6 F) ?

Answers

Answer:

Boise was warmer in April than in May.

Step-by-step explanation:

Answer: Boise was warmer in April (6 3/4 F) than in May (6.6 F).

Step-by-step explanation: PLATO

Answer this question ASAP Plz

Answers

Answer:

a) a

b) a

c) b

formulas you may need for the first two

slope intercept and y = mx+b

for c just look at the graph rise over run

Step-by-step explanation:

good luck

An equal amount of three different juices are combined to make a quart of punch,
How much of each type of juice are needed to make 4 quarts of punch?
A. 1 1/3 quart
B. 4 quarts
C. 5 1/3 quarts
D. 12 quarts

Answers

Answer: A

Step-by-step explanation:

because 1* 3 is 3 then 1/3*3 is 3/3 which is one whole son it s 4 quarts

1 1/3 quart of each type of juice is needed to make 4 quarts of punch. Option A is correct.

What is the Ratio?

The ratio can be defined as the proportion of the fraction of one quantity towards others. e.g.- water in milk.

Here,
An equal amount of three different juices are combined to make a quart of punch,
For 1 quart, of punch, the proportion of each of the three juice will be 1/3,
Now,
for 4 quarts of juice proportion of each juice will be 4 times 1/3 so,
Quantity of each juice = 4/3 or  1 1/3.

Thus, 1 1/3 quart of each type of juice is needed to make 4 quarts of punch. Option A is correct.

Learn more about ratios here:

brainly.com/question/13419413

#SPJ2

Which gives the correct values for points A, B, C, and D?
PLEASE HELP ASAP!

Answers

Hope this helps!

A is-2/5

B is -1/5

C is -4/5

D is -3/5

Answer:

none of them do

Step-by-step explanation:

Select the shapes that are similar to shape A.

Answers

I’m pretty sure it’s only pink because green and orange are the same and their point is a bit shorter!

Kino bought a pizza for $12 and four medium drinks at Mariano's Pizza. Use n as a variable and write an expression to represent the total amount of money she spent

Answers

Answer:

12p + 4d = n

Explanation:

p stands for pizza, d for drinks. And the unknown amount of money spent here is represented by n.

p + d will be our total, that's why it is addition.

Answer: Give brainlest and like an give stars cuz this is correct .

Step-by-step explanation:

a = cost of 1 drink $12.75 + 4a $12.75 + $12.00 = $24.75

you could do this one tooo let x represent cost of soda

y = 4x + 12.75

and if you put the three dollars into x

y = 12 + 12.75

so y = 24.75

thank you have a nice say

A contractor purchases 5 dozen pairs of padded work gloves for ​$67.80. She incorrectly calculates the unit price as ​$13.56 per pair for the expense report. What is the correct unit​ price? What is the​ error?

Answers

Answer:

I think the answer would be $1.13 per pair.

Step-by-step explanation:

It states that there were 5 dozen gloves, a dozen equals 12, or in this case 12 pairs. 5 dozen means there would be 5×12=60 or 60 pairs. 67.80÷60(pairs)=1.13 dollars PER pair.

The error is that she divided with the 5 dozens, instead of individual pairs.

I need help with this!!!!!

Answers

Answer:

A) 4(7+x)=64

B) 4x+7=64

Step-by-step explanation:

A

4(7+x)=64

*Disturabute 4 to (7+x)*

28+4x=64

*Subtract 28 on both sides*

4x=36

*Divide by 4*

x=9

**If you do a Check it works*

B

4x+7=64

*Subtract 7*

4x=57

*Divide by 4*

x=14.25

**If you do a Check this also works**

Hope This Helps!!!

How do you solve this;

The price of a theater ticket increased from $7.50 to $7.75. The theater sold 315 tickets at the higher price. With the price increase, how much more did the theater earn on the tickets?

Answers

Answer: 78.75

its just multiplying the extra 25 cents they added by the number of tickets they sold(315) and that equals 78.75$

Blossom typed 1/8 of her report on Monday. She typed 1/4 of the report of Tuesday. How much of the report does she need to type to finish it on Wednesday?

Answers

Answer:4

Step-by-step explanation:

Answer: 5/8

That's it

Jose has scored 206 points on his math tests so far this semester. To get an A for the semester, he must score at least 279 points.

Answers

Answer:

206 + n = 279

Step-by-step explanation:

Find the slope and the y-intercept of the graph of the linear equation. y=−3−1/4x

Answers

the slope is: -1/4
the y-intercept is: -3

Answer:

m= -1/4

b= -3

Step-by-step explanation:

y=mx+b

slope=m

m= -1/4

b=y-intercept

b= -3

john has four more nickels than dimes in his pocket, for a total of $1.25. Which of the following equations could be used to determine the number of dimes,d, in his pocket?

Answers

Answer: You could use really any but i would probably do division or subtraction

Step-by-step explanation:

Rectangle A′B′C′D′ is the image of rectangle ABCD after a dilation.



What is the scale factor of the dilation?



Enter your answer in the box.

Answers

1/2 because all points are half of the original

Answer:

The dilation's scale factor is 1/2.

Step-by-step explanation:

What we know:

Square ABCD's side lengths are all 3.

-2 - (-5)

-2 + 5 = 3

-5 - (-8)

-5 + 8 = 3

Square A'B'C'D''s side lengths are all 1.5.

-2.5 - (-4)

-2.5 + 4 = 1.5

-1 - (-2.5)

-1 + 2.5 = 1.5

Divide the scale (A'B'C'D') by the original (ABCD) to get the scale factor

1.5/3 = 1/2 as the scale factor of the dilation

Please help!!

fhasidhasiuhdhdas (this was so i could post the question)

Answers

It goes up by 9$ and hour

“The Settlers” by Rowena Jackson

1 Little Bear crept closer through the tall grass until he had a better vantage point to watch the trail of wagons pass. He’d never seen white people before, though his father sometimes traded skins and bows with the men. Little Bear had heard all of the warnings, but he still wanted to see what they looked like.

2 One wagon fell behind the rest of the caravan. The rains of the past few days had turned the trail to thick mud, and the wagon’s oxen were tired. They made it another few minutes before Little Bear heard a loud crack, and the back corner of the wagon crashed to the ground.

3 Two people from the wagon inspected the broken wheel. Little Bear froze when one pulled out a rifle and fired it into the air. He crouched into a small ball in the weeds, his heart drumming in his ears. But then he saw other people running to help the stranded travelers, and he knew that the rifle shot had just been a signal.

4 Just then, there was a rustle in the grass beside Little Bear. He let out the long breath he’d been holding when he saw it was just his older brother, White Deer, who silently signaled that they needed to return home before the settlers spotted them.

5 Little Bear followed, but he paused a moment to glance back. Traveling out on the open prairie was dangerous, and the settlers were just people. He hoped the pioneer family got their wagon wheel fixed soon.

Question: In paragraph 3, why does the author choose the words froze, crouched in a small ball and heart drumming in his ears?

Group of answer choices

-----------------------------------------------------------------------------------------------------------------------------
Question: In paragraph 3, why does the author choose the words froze, crouched in a small ball and heart drumming in his ears?

Group of answer choices

To show that Little Bear was frightened by the sound of the rifle being shot.

To show that Little Bear is cold.

To show that Little Bear wanted to know more about the settlers.

To show that Little Bear was afraid when White Dear crept up on him.
-----------------------------------------------------------------------------------------------------------------------------
Question: What is Little Bear’s attitude toward the white settlers in the last paragraph?

Group of answer choices

Little Bear is still scared of the settlers.

Little Bear hopes they get their wheel fixed and leave soon.

Little Bear wanted to know more about the settlers.

Little Bear is no longer afraid of the settlers
-----------------------------------------------------------------------------------------------------------------------------
Question: Which statement from the text best supports Little Bear’s point of view about the white settlers at the end of the story?

Group of answer choices

Little Bear followed White Dear and returned home.

He realized that the settlers were people just like him.

Little Bear thought traveling on the open prairie was dangerous.

Little Bear was relieved when he realized the rifle shot had just been a signal.
-----------------------------------------------------------------------------------------------------------------------------
Question: From what point of view is this story told?

Group of answer choices

first person

second person

third person limited

third person omniscient

This ia all my points

Answers

Question one is to show that little bear was frightened of the shot

Question 2 is little bear hopes they get there wheel fixed soon

Question 3 is he realized that the settlers were people like him

Question 4 is third person limited
poggers poggers poggers

Farmer Jane picked 2,552 strawberries. She shared the strawberries among 9 bins. She wrote an equation to find the total number of strawberries in each bin. 2,522 ÷ 9 = 280 r 2. What does the number 2 represent about Farmer Jane's strawberries?
Question 2 options:

It represents the number of bins leftover.

It represents the number of bins the strawberries were shared into.

It represents the number of strawberries that need to be divided.

It represents the number of strawberries that were not placed in bins.

Answers

Answer:

D.

Step-by-step explanation:

R is remainder and to have equal amounts in each bin she could not put them in one.

It represents the number of bins leftover.

Hope this helped:) Have a grate holiday!

5w+ 16 = 96

solve for w
simplify your answer as much as possible

Answers

Answer:

w = 16

Step-by-step explanation:

5w+ 16 = 96

or, 5w = 96-16

or, w = 80/5

or, w =16

Answer:

[tex]w=16[/tex]

Step-by-step explanation:

[tex]5w+16=96[/tex]

To solve for [tex]w[/tex], you must first begin by subtracting [tex]16[/tex] from both sides of the equation:

[tex]5w=80[/tex]

Then, divide both sides of the equation by the coefficient of [tex]w[/tex], which is [tex]5[/tex]:

[tex]w=16[/tex]

-

To check your work, substitute the solved value of [tex]w[/tex], ([tex]16[/tex]), in for [tex]w[/tex] in the initial equation:

[tex]5w+16=96[/tex]

[tex]5(16)+16=96[/tex]

[tex]80+16=96[/tex]

[tex]96=96[/tex]

Since both sides of the equation are equal, our solution is correct!

help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answers

Answer: Its so blurry. I cant see the question

Step-by-step explanation:

For some reason it’s burly so I can’t really see the question

Can someone step by step explain this to me?
Which is a simplified form of the expression -4(3r – 2) – 2(r + 1)?
Whoever helps gets 50 bonus points.

Answers

-4(3r - 2) - 2(r + 1) = 0

-12r + 8 - 2r - 2 = 0

-14r + 6 = 0

-14r = - 6

r = 6/14

r = 3/7

Answer:

[tex]\huge\boxed{\sf -14r+6}[/tex]

Step-by-step explanation:

[tex]\sf -4(3r-2)-2(r+1)\\\\Resolving \ Parenthesis\\\\= -12r+8-2r-2\\\\Combining \ like \ terms\\\\= -12r -2r +8-2\\\\= -14r+6\\\\\rule[225]{225}{2}[/tex]

Hope this helped!

~AH1807

Which equation can be used to find 60 percent of 50? StartFraction 60 times 2 Over 50 times 2 EndFraction = StartFraction 120 Over 100 EndFraction StartFraction 50 divided by 1 Over 60 divided by 1 EndFraction = StartFraction 50 Over 60 EndFraction StartFraction 60 divided by 2 Over 100 divided by 2 EndFraction = StartFraction 30 Over 50 EndFraction StartFraction 100 times 2 Over 50 times 2 EndFraction = StartFraction 200 Over 100 EndFraction

Answers

Answer:

50/100=.5, .5x60= 30

30

30 is thah answer nshshshs

There are 40 houses in a neighborhood.
• Company X provides electricity to 1/8 of the houses.
• Company Y provides electricity to 1/2
of the houses.
• Company Z provides electricity to the remaining houses.

In this neighborhood, Company Z provides electricity to —

Answers

15.

Explanation: 1/8 of 40 is 5, 1/2 of 40 is 20. 20+5=25 and 40-25=15

Answer:

15 houses

Step-by-step explanation:

40 ÷ 8 = 5  Company X provides electricity to 5 houses

40 - 5 = 35

Half of 40 = 20  Company Y provides electricity to 20 houses

35 - 20 = 15

Company Z provides electricity to 15 houses.

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