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
algol13
3 years ago
9

How much glycerol ( is liquid supplied at 100%) would you need to make 200 mL of 20% v/v (volume/volume) glycerol solution?

Chemistry
1 answer:
RSB [31]3 years ago
6 0

Answer:

40mL of glycerol are needed to make a 20% v/v solution

Explanation:

This problem can be solved with a simple rule of three:

20%  v/v is a sort of concentration. In this case, 20 mL of solute are contained in 100 mL of solution.

Therefore, in 100 mL of solution you have 20 mL of solvent (glycerol)

In 200 mL, you would have,  (200 .20)/ 100 = 40 mL

You might be interested in
Do the chemical bonds between atoms change during cellular respiration?
borishaifa [10]
During cellular respiration, the carbon and hydrogen atoms change partners and bond with oxygen atoms instead. The carbon-hydrogen bonds are replaced by carbon-oxygen and hydrogen-oxygen bonds. As the electrons of these bonds "fall" toward oxygen, energy is released.
6 0
2 years ago
I don't really understand this worksheet question.​
Citrus2011 [14]
25/2 and 96/X
CROSS MULTIPLY.

2x=2,400.
divide by 2.
x=1,200.

you take the GIVEN MASS of an element, and you put it on top, the coefficient is what it’s over. i believe this is right
3 0
3 years ago
Why does the titration of a weak acid with a strong base always have a basic equivalence point? Why does the titration of a weak
CaHeK987 [17]

Answer: Option (c) is the correct answer.

Explanation:

When a weak acid reacts with a strong base then it results into the formation of a basic solution. Hence, the resulting solution will always have a pH greater than 7.

Since, at the equivalence point number of hydrogen ions become equal to the hydroxide ions. Therefore, pH of solution will be about 7.

So at the equivalence point, the weak acid will get neutralized due to the addition of strong base. Therefore, it will lead to the formation of conjugate base.

As a result, the solution will become slightly basic in nature.

Thus, we can conclude that at the equivalence point, the acid has all been converted into its conjugate base, resulting in a weakly acidic solution because at the equivalence point, the acid has all been converted into its conjugate base, resulting in a weakly basic solution.

5 0
3 years ago
1) A certain liquid has a density of 0.80 g/ml. What is the mass of a 40 ml sample of this liquid? 1)
Llana [10]

Answer:

The answer is

<h2>32 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume = 40 mL

density = 0.80 g/mL

The mass is

mass = 40 × 0.8

We have the final answer as

<h3>32 g</h3>

Hope this helps you

8 0
3 years ago
Consider these scenarios. Scenario A: Carmen reads an article in Tasty Food magazine stating that eating an apple can help you f
Reika [66]

Answer:

Scenario B

Explanation:

In Scenario B; Yuki reads an article in the Professional Journal of Medicine stating that ginger root can help prevent some types of cancer. The article was published in a professional journal. Manuscripts sent to professional journals for publication must pass through a peer review process in order to ascertain the reliability of the data presented.

Magazine articles may not go through a peer review process since it is not written for the consumption of a professional audience.

5 0
3 years ago
Read 2 more answers
Other questions:
  • How many calories of heat are necessary to raise the temperature of 319.5 g of water from 35.7 °C
    6·1 answer
  • Suppose you were making 100.0 mL of a solution that is 0.040 M KCl. What mass of KCl should you weigh to make this solution?
    14·1 answer
  • HELP ASAP
    12·1 answer
  • What is the importance of standardization in chemistry​
    15·1 answer
  • A student measured a strip of aluminum as 1.25m long. The teacher said it was actually 2.12m long. What was the student's percen
    7·1 answer
  • If the following elements were to combine with each other, choose which demonstrate the Law of Multiple Proportion. Select all t
    14·1 answer
  • An electrically neutral atom of oxygen has eight electrons. What other facts do you know for sure about this atom? 1.) there are
    9·2 answers
  • If one parent has sickle cell anemia and the other parent is a carrier, what is the possibility that their child will have sickl
    10·1 answer
  • What would be the effect on this reaction of increasing the temperature?
    15·2 answers
  • 4. When a turbine spins, it generates electrical energy and that is where it gets its name from.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!