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
IRISSAK [1]
3 years ago
14

A student dissolves 7.9 g of stilbene (C14H12) in 475. mL of a solvent with a density of 1.03 g/mL. The student notices that the

volume of the solvent does not change when the stilbene dissolves in it. Calculate the molarity and morality of the students solution. Round both of your answers to 2 significant digits.
Chemistry
1 answer:
andrey2020 [161]3 years ago
6 0

Answer:

Molarity: 0.092M

Molality: 0.090m

Explanation:

Molarity, M, is defined as the moles of solute (In this case, C14H12 -Molar mass: 180.25g/mol-) in 1L of solution.

The molality, m, are moles of solute per kg of solvent.

<em>Molarity:</em>

<em>Moles solute: </em>

7.9g * (1mol/180.25g) = 0.04383 moles

<em>Liters solution:</em>

475mL = 0.475L

Molarity: 0.04383 moles / 0.475L = 0.092M

<em />

<em>Molality:</em>

<em>kg solvent:</em>

475mL * (1.03g/mL) = 489.25g = 0.48925kg

Molality:

0.04383 moles / 0.48925kg = 0.090m

You might be interested in
What is it called when particles travel from an area of high consentration to an area of low consentration?
Umnica [9.8K]
If it isn't using energy, it's called diffusion
8 0
3 years ago
? Question
mr_godi [17]

A is the answer

In an ozone molecule, the three atoms must be connected, so there must at least be a single bond between them. Place

dots in pairs around the oxygen atoms until each oxygen atom has eight valence electrons, starting with the atoms on the

outside and doing the central atom last if there are enough. Do not exceed the total number of valence electrons

identified in part A. Remember that the dashes between the oxygen atoms, which represent single bonds, each indicate

the presence of two valence electrons

6 0
2 years ago
How many nonbonding electron pairs are there in the lewis structure of the peroxide ion, o22−?
Tom [10]
There is 6 non - bonding pairs.
Let me show you one easy method to do this.
o22-, oxygen valence electron = 6 here we have two so total 12, and -2 that means we add electrons so it’s all equal to 14 right.
whenever need to find lone pair, subtract the number you get with the lowest multiple of 8.
here we total 14 valence electron right so lowest multiple of 8 would be 8.
so 14 - 8 = 6 and that is our answer.
Let me know if you have Problem with chemistry.
8 0
3 years ago
Read 2 more answers
Which component is missing from the process of photosynthesis? Carbon Dioxide + Water + _________ → Glucose + Oxygen Group of an
telo118 [61]

Answer:

Sunlight

Explanation:

Photosynthesis is the process where by plants manufacture their own food through conversion of carbon(iv)oxide and water in presence to sunlight to produce glucose and oxygen as by product.

The reaction is photo-catalyzed and would only take place in the presence of sunlight.

6CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6O₂

4 0
3 years ago
Read 2 more answers
Hydrogen has three isotopes 1H, 2H, and 3H. What is the difference between these three isotopes?
Leona [35]
The main difference between the 3 isotopes of hydrogen are the number of neutrons in the nucleus. Hydrogen has no neutrons, Deuterium has one neutron, and tritium has two neutrons. All three have one proton and one electron.
4 0
2 years ago
Other questions:
  • 1 atm is equal to: <br> A. 1 mmHg <br> B. 14.7 mmHg <br> C. 76 mmHg <br> D. 760 mmHg
    11·2 answers
  • A 500 gram piece of metal has a volume of 2.75cm3 what is the density
    15·2 answers
  • Compare and contrast the compounds CH4 and PH3 in terms of covalent bonding, molecular geometry (shape), and intermolecular forc
    7·1 answer
  • What steps are being taken to ensure that copper will continue to be available in the future?
    10·1 answer
  • What is the [H3O+] in a solution with [OH-] = 1.0 x 10-12 M?
    9·1 answer
  • When iron reacts with oxygen, it forms iron oxide, or rust.
    11·1 answer
  • Describe how light is emitted from an atom. A) As protons absorb energy they travel from the nucleus through the atom emitting l
    6·1 answer
  • Question 5 (1 point)<br> Potassium Bromide is insoluble.<br> O True<br> O False
    13·2 answers
  • PLEASEE HELP ASAP WILL MARK BRAINLIEST
    8·2 answers
  • Because of a scarcity of workers in the New World, persons were transported against their will to work on large farms without pa
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!