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
irakobra [83]
2 years ago
10

How much pure alcohol must a pharmacist add to 10 cm.

SAT
1 answer:
Lera25 [3.4K]2 years ago
3 0

The amount of pure alcohol that the pharmacist must add to 10 cm of a 10% alcohol solution to strengthen it to a 70% solution is; 20 cm³

<h3>Volume of Solutions</h3>

Let x represent the volume of 100% pure alcohol in cm³ that is required to be added. Thus;

x(100%) + 10%(10 cm³) = 70%(x + 10 cm³)

Multiplying out the bracket gives;

x + (10 × 0.1) = 0.7(x + 10)

⇒ x + 1 = 0.7x + 7

x - 0.7x = 7 - 1

0.3x = 6

x = 6/0.3

x = 20 cm³

In conclusion. the volume of pure alcohol required to be added to 10 cm of a 10% alcohol solution to strengthen it to a 70% solution is 20 cm³

The complete question is;

How much pure alcohol must a pharmacist add to 10 cm of a 10% alcohol solution to strengthen it to a 70% solution? ASAP

Read more about Volume of solution at; brainly.com/question/26015585

You might be interested in
Nine less than four times a number equals fifteen
Natasha_Volkova [10]
Simple
Nine less than a number times four equals fifteen
basically, x*4-9=15 would be your equation, or something similar
Well, we know x can't equal 1,2,3,OR 4. Five is also out, because 5*4=20-9=11, so cross that out.
But if you try doing 6*4-6=15, it fits.
6*4=24, 24-9=15
Thus, x=6, so your answer to Nice less than four times a number equals fifteen is 6. 
~Hope this helps!

6 0
3 years ago
15. For a random sample of n = 64, find the probability of a sample mean being
mart [117]

Answer:

0.9726

Explanation:

The computation of the probability of a sample mean is shown below:

P(\bar x < 24.3)

To find the probability first we have to determine the z score which is

z = \frac{\bar x - \mu_{\bar x}}{\sigma_{\bar x}} \\\\ = \frac{\bar x - \mu }{\frac{\sigma}{\sqrt{n} } } \\\\ = \frac{24.3 - 24}{\frac{1.25}{\sqrt{64} } }

= 1.92

Now probability is

P(\bar x < 24.3) \\\\= P(z < 1.92)

= 0.9726

Hence, the probability of the sample mean is 0.9726

We simply applied the above formulas to determined the probability of a sample mean and the same is to be considered

6 0
3 years ago
Which BEST describes the physical properties of the Earth's core?A)semi-moltenB)water and organic substancesC)a solid lower part
andrew11 [14]

Answer: C) A solid lower part and a liquid upper part

Explanation:

The Earth's outer core is a fluid layer and composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. Hopefully I'm right!

6 0
3 years ago
Which situation would most likely be covered by long term disability insurance brainly
Karo-lina-s [1.5K]

Answer:

the Long term disability insurance protects you during lengthy of disability when you’re unable to work (for example, if you are injured.) It is sometimes described as income replacement insurance, as it will pay you a monthly amount that replaces your regular paycheck while you are not working.

Explanation:

hope this helps if not let me know

3 0
2 years ago
Why computer are important for us​
shutvik [7]

Answer:

Computers allow us to answer or solve questions that we cannot solve ourselves. It can also allow us to research answers or make more questions or answers...

Explanation:

for the people with ads

<h2>      ↓↓↓↓↓↓↓</h2><h2>Computers allow us to answer or solve questions that we cannot solve ourselves. It can also allow us to research answers or make more questions or answers...</h2><h2></h2><h2>Computers allow us to answer or solve questions that we cannot solve ourselves. It can also allow us to research answers or make more questions or answers...</h2><h2></h2><h2>Computers allow us to answer or solve questions that we cannot solve ourselves. It can also allow us to research answers or make more questions or answers...</h2>
5 0
2 years ago
Read 2 more answers
Other questions:
  • Organizing sentences around a central idea creates a what
    14·2 answers
  • How would the authors of passage 2 most likely respond to the prospect referred to in sentence 1 of paragraph 5 in passage 1
    5·1 answer
  • Do your parents or grandparents still play candy crush?<br> (doing an experiment)
    11·1 answer
  • The choices are <br> O solar flares <br> O neap tides<br> O new moon <br> O eclipse
    15·2 answers
  • What do you think to improve for your grades the next virtual school term..????​
    8·2 answers
  • How did the leadership of Samuel Gompers from the American Federation of Labor differ from Terence Powderly of the Knights of La
    7·2 answers
  • Is it true that the Curie family has won 5 Nobel Prizes?
    5·1 answer
  • Access to this page has been denied because we believe you are using automation tools to browse the website.
    5·1 answer
  • What is (f+g)(x)? f(x)=x2−36 g(x)=x3+2x2−10 enter your answer in standard form in the box. (f+g)(x)=
    8·1 answer
  • What happened to jobs for women after the end of World War I
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!