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
kotegsom [21]
3 years ago
8

How much of the 8% solution should we use to make 100g of a 3% solution?

Mathematics
2 answers:
sp2606 [1]3 years ago
8 0
Suppose x grams of 8% solution should be mixed to make 100 g of 3% solution.
here we shall have:
the amount of 3% solution in the 100 g will be:
3/100*100=3 grams
the the equation will be, 8% of what quantity becomes 3g?
(8/100)*x=3
hence solving for x we shall have:
0.08x=3
x=3/0.08
x= 37.8 grams
The implication of this is that, when you have 37.5 grams of 8% solution, that will contain 3  of pure chemical and hence when you add more solvent on top of 37.5 g until you reach 100g, that will be 3% solution.
gizmo_the_mogwai [7]3 years ago
8 0

Answer: 37.5 gram

Step-by-step explanation:

Since, by the dilution equation,

M_1\times V_1 = M_2\times V_2

Where, M_1 and V_1 are the molarity and volume of the concentrated stock solution and M_2 and V_2 are the molarity and volume of the diluted solution we want to make.

Here, M_1 = 8\% = 0.08,

M_2 = 3\% = 0.03,

V_2 = 100\text{ gram}

And, V_1 = ?,

0.08\times V_1 = 100\times 0.03

0.08\times V_1 = 3

8\times V_1 = 300

V_1 = 37.5\text{ gram}


You might be interested in
From a group of 11 people, you randomly select 2 of them. What is the probability that they are the 2 oldest people in the group
Artemon [7]

Answer:

2/11

Step-by-step explanation:

Probability is the LIKELIHOOD of an event.

According to the word problem, there are 11 people in total and 2 of them are being selected.

The probability of them being the 2 oldest people is 2 in 11, or 2/11.

8 0
2 years ago
Records at an insurance company showed that the first 30 customers made an average of 5 claims each through their lifetime. Afte
umka2103 [35]

The average of the 75 customers will be 6.4.

<h3>How to calculate the value?</h3>

The first 30 customers made an average of 5 claims each. The total claims will be:

= (5 × 30) = 150

When 75 more people were assessed, the average was 6. Therefore, the total claims will be:

= (75 + 30) × 6

= 105 × 6

= 630

Therefore, the average of the 75 customers will be:

= (630 - 150)/75

= 480/75

= 6.4

Learn more about mean on:

brainly.com/question/1136789

#SPJ1

8 0
2 years ago
All 231 students in math club went on a field trip some rode in vans that held 7 people and some rode on buses that held 25 peop
MariettaO [177]

Answer:

8 vans

7 buses

Step-by-step explanation:

Let there be "b" buses

and "v" vans

Since 7 people is the capacity of vans, the total capacity is

7v

Also, since 25 people is the capacity of 1 bus, the total capacity is

25b

In total 231 people, so we can write our first equation as:

7v + 25b = 231

Now, we know there are 15 vehicles (bus + vans) in total, so we can write our 2nd equation as:

v + b = 15

Now, we solve for v and b. Let's solve the 2nd equation for v and substitute that into 1st and solve for b first:

v + b = 15

v = 15 - b

Now,

7v + 25b = 231\\7(15-b) + 25b = 231\\105-7b+25b=231\\18b=126\\b=7

Hence, there are 7 buses

Since 15 vehicles in total, the number of vans is:

15 - 7 = 8 vans

So,

8 vans

7 buses

8 0
3 years ago
The late fee at the library is based on the number of days a book is late. Carter paid $1.08 for a book that was 9 days late. If
Nataly [62]

Answer:

16

Step-by-step explanation:

4 0
2 years ago
Strawberries cost $3.00 per pound. For each question
antoniya [11.8K]

A. 1/3 pound

B. 11/3 or 3.666666667

7 0
2 years ago
Read 2 more answers
Other questions:
  • How to find the answer to 361/2
    13·2 answers
  • What is the volume of the figure? Enter the answer in the box.
    10·2 answers
  • ∠A and ∠B are complementary angles. The measure of ∠A=4x° and the measure of ∠B=50°. Find m∠A. * i dont understand can someone h
    8·1 answer
  • Can someone help me.
    8·1 answer
  • Solve the system of equations.<br> 2y - 3x = -27<br> 5y + 3x = 6<br> What is the x ?
    10·1 answer
  • In the equation y=5x, what is the value of M?​
    13·1 answer
  • Repost: I don't want anyone to give me the answer. I just need to know the best way to solve it.
    7·1 answer
  • Two students, Stephanie and Maria, want to find out who has the higher GPA when compared to each of their schools. Stephanie has
    8·2 answers
  • What is the range for the following<br> numbers?<br> 5, 1, 12, 3, 4, 2, 10
    5·2 answers
  • Helpppppppppppppppppppppppppppppppppp!!!!!!!!!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!