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
aleksley [76]
4 years ago
7

An aqueous solution contains 32.7% KCl (wt/wt%). what is the mole fraction of KCl in the solution

Chemistry
1 answer:
inna [77]4 years ago
5 0

The mole fraction of KCl in the solution is 0.1051

calculation

mole fraction of KCl in solution = moles of KCl / total number of moles(moles of KCl +moles of H2O)

moles=mass/molar mass

mass of KCl=32.7g

molar mass of KCl= 39 +35.5

moles of KCl is therefore= 32.7g/74.5 g/mol=0.439 moles

find the moles of H2O= mass of H2O/molar mass

mass of H2O=100-32.7=67.3g

molar mass of H2O=( 1 x2) +16=18 g/mol

moles = 67.3/18 =3.739 moles

total moles=3.739+0.439=4.178 moles

mole fraction is therefore=0.439/4.178=0.1051

You might be interested in
Which of the following is the highest level of organization (least specific)? a. genus c. family b. class d. order
yKpoI14uk [10]
Hello

Your answer would be:

a. genus
4 0
3 years ago
Briefly summarise the death of Jesus Christ​
salantis [7]

Answer:

The death of Jesus was a unique, one of a kind, once for all death that ransomed mankind from sin and satisfied the righteousness of God and made it possible for man to once again have a personal relationship with God. The simple definition of death is separation.

Explanation:

hope this helps? :))

4 0
3 years ago
Read 2 more answers
Two blocks of platinum have a temperature of 200°C. One block has a mass of 10 g, the other block has a mass of 100 g. Do the bl
Katarina [22]

The two blocks have the same amount of thermal energy.

<h3>Effect of temperature on different mass objects</h3>

Due to platinum metal, the thermal energy is equally distributed in the whole metal so that's equal distribution the thermal energy of both blocks will be the same so we can conclude that the two blocks have the same amount of thermal energy.

Learn more about mass here: brainly.com/question/15476873

8 0
2 years ago
Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom?
ser-zykov [4K]

Answer:

Option D

Explanation:

Rutherford deduced that the atomic nucleus was positively charged because the alpha particles that he fired at the metal foils were positively charged, and like charges repel. Alpha particles consist of two protons and two neutrons, so they are positively charged. In Rutherford's experiments most of the alpha particles passed straight through the foil without being deflected. However, occasionally the alpha particles were deflected in their paths, and rarely the alpha particles were deflected backward at a 180 degree angle.

Since like charges repel, Rutherford concluded that the cause of the deflections of the positively charged alpha particles had to be something within the atom that was also positively charged. Rutherford concluded from his metal foil experiments that most of an atom is empty space with a tiny, dense, positively charged nucleus at the center that contains most of the mass of the atom.

7 0
4 years ago
Please help, much appreciated.
Artyom0805 [142]
This is a synthesis reaction, the general pattern is: A+B=AB. It fits, you see :)?
5 0
4 years ago
Other questions:
  • WILL GIVE BRAINLIEST!
    12·2 answers
  • If 1.0 gram of matter was converted to energy, how much energy would be formed?
    11·1 answer
  • How many moles of H2 would be contained in 4.0 L of the gas at 202.6 kPa and 127°C?
    5·2 answers
  • How many moles of He are in 16 g of the element? 1.0 mol 4.0 mol 8.0 mol 16 mol
    9·1 answer
  • Iron fillings sprinkled near a magnet arrange themselves into a pattern that illustrates the
    6·1 answer
  • What is the difference between fission and fusion<br><br> The help would be appreciated
    12·1 answer
  • Given the reaction: 3() + () → 3() + 2()
    8·1 answer
  • Worth 100 points if able to help, please! (show work if possible)
    12·2 answers
  • D. Period 3 element with 6 valence electrons
    9·1 answer
  • If the concentration of a dilute solution of nitric acid is 0. 0001 m. What is the ph of that solution?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!