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
aalyn [17]
3 years ago
7

What is the mole fraction, x, of solute and the molality, m (or b), for an aqueous solution that is 19.0% naoh by mass?

Chemistry
1 answer:
Bond [772]3 years ago
5 0
We will assume that the solvent is water. So, if we have 100 grams of the solution, 19 grams will be sodium hydroxide, while the remaining 81 grams will be water.

The molar weight of sodium hydroxide, NaOH, is 40. The molar weight of water is 18. Finding the moles of each:

NaOH:
19 / 40 = 0.475

Water:
81 / 18 = 4.5

Total moles present:
4.5 + 0.475 = 4.975 moles

The mole fraction of NaOH is:
0.475 / 4.975 = 0.0955

The mole fraction of NaOH is 0.0955
You might be interested in
ASAP: The main difference between the gravitational force and electrical force is that
Dahasolnce [82]

Answer:

Electrical force can pull and push

Explanation:

5 0
3 years ago
Common additives to drinking water include elemental chlorine, chloride ions, and phosphate ions. Recently, reports of elevated
NeX [460]

Answer:

Check the explanation

Explanation:

Kindly check the attached image below to see the step by step explanation to the question above.

8 0
2 years ago
A weather system moving through the American Midwest produced rain with an average pH of 5.02. By the time the system reached Ne
bulgar [2K]

Answer:

The rain falling in New England is 2.29 times more acidic than the one in the American Midwest.

Explanation:

The acidity of a solution depends on the concentration of H⁺ ions ([H⁺]). We can calculate this concentration from the pH using the following expression.

pH = -log ([H⁺])

American Midwest

pH = -log ([H⁺])

5.02 = -log ([H⁺])

[H⁺] = antilog (-5.02) = 9.55 × 10⁻⁶ M

New England

pH = -log ([H⁺])

4.66 = -log ([H⁺])

[H⁺] = antilog (-4.66) = 2.19 × 10⁻⁵ M

The ratio of concentrations is:

\frac{2.19 \times 10^{-5} M  }{9.55 \times 10^{-6} M} =2.29

The rain falling in New England is 2.29 times more acidic than the one in the American Midwest.

4 0
3 years ago
Does a Chemical reaction happen between Sodium and water? I NEED the answer NOW! (please!!!)
kompoz [17]
A chemical reaction does happen between sodium and water to form Sodium Hydroxide (NaOH) and Hydrogen Gas (H-2)
5 0
2 years ago
I WILL GIVE U BRAINLIEST IF UR CORRECT
KiRa [710]

Answer:

D: a new substance

Explanation:

Chemical reaction

A change in matter that produces on or more new substances

7 0
2 years ago
Read 2 more answers
Other questions:
  • Two liquids that are soluble in each other are said to be____
    14·1 answer
  • Identify each of the following mixtures as either homogeneous or heterogeneous and as a solution, a
    6·2 answers
  • How many atoms are in each of the following
    15·2 answers
  • The maximum energy of photo electrons (increases or decreases or remains constant) with increasing frequency and (increases or d
    6·1 answer
  • Identify and label the Brønsted-Lowry acid, its conjugate base, the Brønsted-Lowry base, and its conjugate acid in each of the f
    7·1 answer
  • what is the limiting reactant in the reaction of 12.0 g of SO2 with 8.0 g of H2S and their reaction? what mass of sulfur will be
    8·1 answer
  • 5. Which statement is true about electronegativity?
    7·1 answer
  • Please help do not understand!!!!!!!!!!!!!!!
    11·1 answer
  • How is stoichiometry used to calculate energy released when a mass of liquid freezes?
    9·2 answers
  • Why does a floating leaf indicate photosynthesis has occurred
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!