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
Dimas [21]
3 years ago
9

In a certain medical test designed to measure carbohydrate tolerance, an adult drinks 6 ounces of a 40% glucose solution. When t

he test is administered to a child, the glucose concentration must be decreased to 30%. How much 40% glucose solution and how much water should be used to prepare 6 ounces of 30% glucose solution?
Chemistry
1 answer:
Ostrovityanka [42]3 years ago
8 0

Answer:

4.5 ounces of 40% glucose solution and 1.5 ounces of water.

Explanation:

The new solution will be prepared by adding more solvent, so the relation between concentration and volume is given by:

C1xV1 = C2xV2

Where C is the concentration, V is the volume, 1 represents the initial solution and 2 the final solution.

We want 6 ounces of a solution which 0.3 glucose, so :

0.4xV1 = 0.3x6

0.4xV1 = 1.8

V1 = 4.5 ounces

So, it's necessary 4.5 ounces of the 40% glucose solution. The volume of water (Vw) will be the total volume less the volume of the solution:

Vw = 6 - 4.5

Vw = 1.5 ounces

You might be interested in
The warmer water contacting the ice cube transfers energy to that ice cube through what process
lys-0071 [83]

the answer is conduction

4 0
3 years ago
How does light travel?
kipiarov [429]
Through stored energy is how light travels
3 0
3 years ago
Why is the metric system the preferred system of measurement for science
Nikolay [14]
In is a lot easier because it uses 10s.
3 0
3 years ago
Read 2 more answers
What is the pH of a solution with an [H+] of (a) 5.4 x 10-10, (b) 4.3 x 10-5, (c) 5.4 x 10-7?
IgorLugansk [536]

Answer:

a. 9.2

b. 4.4

c. 6.3

Explanation:

In order to calculate the pH of each solution, we will use the definition of pH.

pH = -log [H⁺]

(a) [H⁺] = 5.4 × 10⁻¹⁰ M

pH = -log [H⁺] = -log 5.4 × 10⁻¹⁰ = 9.2

Since pH > 7, the solution is basic.

(b) [H⁺] = 4.3 × 10⁻⁵ M

pH = -log [H⁺] = -log 4.3 × 10⁻⁵ = 4.4

Since pH < 7, the solution is acid.

(c) [H⁺] = 5.4 × 10⁻⁷ M

pH = -log [H⁺] = -log 5.4 × 10⁻⁷ = 6.3

Since pH < 7, the solution is acid.

3 0
3 years ago
Why does the melting of the polar ice caps facilitate the absorption of CO2 by ocean waters?​
Korvikt [17]

hi brainly user! ૮₍ ˃ ⤙ ˂ ₎ა

⊱┈────────────────────────⊰

Answer:

The melting of the caps increases the concentration of CO2 in the water, making its absorption faster.

⊱┈────────────────────────⊰

Explanation:

<h2><u>CO2 absorption</u><u> </u></h2>

The polar caps of our planet have in their composition several elements, among them the CO2 that is absorbed by the atmosphere. Cold waters, which are present in the Arctic, have an easier time absorbing CO2 compared to other waters.

When glaciers melt, the CO2 that is present in the mixture is dissolved in the ocean, increasing its concentration. The cold waters that came from the ice caps increase the absorption of CO2.

Learn more about natural methods remove CO2 from the atmosphere in:

brainly.com/question/14323197

#SPJ2

4 0
1 year ago
Other questions:
  • Is MgCo3 = MgO + CO2 redox reactions
    5·1 answer
  • At constant pressure, which of these systems do work on the surroundings? Check all that apply.
    13·1 answer
  • What the other name of atoms?
    7·1 answer
  • Assume the atomic mass of element x is 22.99 amu. A 22.42 g sample of x combines with 34.56 g of another element y to form a com
    6·2 answers
  • An acid with a p K a of 8.0 is present in a solution with a pH of 6.0. What is the ratio of the protonated to the deprotonated f
    9·1 answer
  • Which statement is true according to the kinetic theory?
    11·1 answer
  • 1 An<br>atom<br>has 20<br>number?<br>with 39<br>neutron<br>mass number<br>it's<br>atomic​
    10·1 answer
  • Whats the function of Cytoplasm
    13·2 answers
  • 21. A piece of metal with a a mass of 15.2 g is heated from 17°C to 42°C. In the process it absorbs 1362 J of
    13·1 answer
  • What is the energy of a photon with a frequency of 3.2 x 10 -2 Hz?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!