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
Tomtit [17]
3 years ago
13

What is the mole fraction of water in 200g of 95 ethanol?

Chemistry
1 answer:
deff fn [24]3 years ago
7 0
             <span> If the solution is 95% by weight, that means that in 100 grams of solution you have 5 grams of water and 95 grams of ethanol.

Convert each of these masses to moles by dividing each mass by the molar mass of the compound.

5 g/18 g/mol = 0.278 mol water
95 g / 46g/mol = 2.065 mol ethanol

Mole fraction water:
= mol water / total moles
= 0.278/ (0.278 + 2.065)
= 0.119 </span>
You might be interested in
Molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement of __________.A) the law of multiple
fgiga [73]

Answer:

The correct answer is B.

Explanation:

The molecule of water has 2 atoms of hydrogen and 1 atom of oxygen.

The ratio of masses are given as:

2\times 1 g/mol: 1\times 16 g/mol= 1 : 8

This illustrates the law of definite proportions which is also known as law of constant compositions .

The law states that 'the elements combining to form compound always combine in a fixed ratio by their mass.'

Whereas :

Law of multiple proportion states that when two elements combine with each other to form more than one compounds , the mass of one element with respect to the fixed mass of another element are in ratio of small whole numbers.

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

In a balanced chemical reaction ,total mass on the reactant side must be equal to the total mass on the product side.

Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.

7 0
3 years ago
How many moles are in 29.5 grams of Ax?
JulsSmile [24]

The number of moles present in 29.5 grams of argon is 0.74 mole.

The atomic mass of argon is given as;

Ar = 39.95 g/mole

The number of moles present in 29.5 grams of argon is calculated as follows;

39.95 g ------------------------------- 1 mole

29.5 g ------------------------------ ?

= \frac{29.5}{39.95} \\\\= 0.74 \ mole

Thus, the number of moles present in 29.5 grams of argon is 0.74 mole.

<em>"Your question seems to be missing the correct symbol for the element" </em>

Argon = Ar

Learn more here:brainly.com/question/4628363

6 0
2 years ago
The movement of water both on and<br> above Earths surface
DanielleElmas [232]

The movement of water on and above the earth's surface is called the hydrologic cycle, or the water cycle. Hope this helps!

4 0
3 years ago
Which is not a compound? a)Gold b)water c)sugar D)silicon dioxide
sweet [91]
Gold is an element. Water is made from hydrogen and oxygen, and silicon dioxide is an oxide of silicon, consisting of <span> two oxygen atoms and one silicon</span>
8 0
2 years ago
What does the atomic mass of an element on the periodic table represent?
Lynna [10]
The atomic mass on the periodic table represents the sum of number of protons and number of neutrons.

Atomic mass = Number of protons + number of neutrons

Hope this helps!
3 0
3 years ago
Other questions:
  • The heat of fusion for ice is 334 joules per gram. Adding 334 joules of heat to one gram of ice at STP will
    12·1 answer
  • The process by which water vapor changes to liquid water is called
    15·1 answer
  • What is an example of a physical change
    10·2 answers
  • Tiny water droplets in the air disperse the white light of the sun into a rainbow. What is the energy of a photon from the red p
    12·1 answer
  • What type of wave produces sound?
    8·1 answer
  • Find the density of a block with a length of 8.0 cm, a width of 4.0 cm, a height 2.0 cm,
    6·1 answer
  • Question 1 (5 points)
    14·1 answer
  • Which of the following is NOT a trait of gases ?
    5·2 answers
  • Four atoms and/or ions are sketched below in accordance with their relative atomic and/or ionic radii. Which of the following se
    5·1 answer
  • Help please it’s worth 20 points
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!