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
daser333 [38]
2 years ago
5

4. a compound called pyrene has the empirical formula c8h5. when 4.04 g of pyrene is dissolved in 10.00 g of benzene, the boilin

g point of the solution is 85.1°c calculate the molar mass of pyrene and determine its molecular formula. the molal boiling-point constant for benzene is 2.53°c/m. its normal boiling point is 80.1°c
Chemistry
1 answer:
e-lub [12.9K]2 years ago
3 0

The molecular mass of pyrene is 204.4 g/mol.

From;

ΔT = Kb m i

Where;

  • ΔT = boiling point elevation
  • Kb = boiling point constant
  • m = molality
  • i = Van't Hoff factor

Since the compound is molecular; i = 1

The number of moles of pyrene = 4.04 g/MM

Where; MM = molar mass of pyrene

molality = number of moles of pyrene/mass of solvent in Kg

The mass of solvent = 10 g or 0.01 Kg

molality =  4.04 g/MM/0.01

ΔT = Boiling point of solution - Boiling point of pure solvent

ΔT = 85.1°C - 80.1°C

ΔT = 5°C

5 = 2.53 × 4.04 g/MM/0.01 × 1

5 = 10.22 × 1/0.01 MM

0.05MM = 10.22

MM= 10.22/0.05

MM= 204.4 g/mol

Learn more: brainly.com/question/2292439

You might be interested in
What is the mass of 2.80 grams of H2O
IrinaK [193]

The mass of 2.80 grams of h2o is 18.02 amu I believe

8 0
3 years ago
Journal making expressing qualitative data and quantitative data.
barxatty [35]
Journal making expressing data and quantitative data

6 0
2 years ago
How many Liters are there in 51. 300 cm? (11 = 1000 cm)
Black_prince [1.1K]

Answer:

4,572.67

Explanation:

11 divided by 1000= 90.90

44= 11x

x=4

4 x 11= 4000

44-51.300=6.300

6.300 x 90.90=572.67

4000 + 572.67 = the answer

7 0
3 years ago
A geologist is studying the shore along a river. She finds a pile of rocks at the base of a riverbank. These broken rock pieces
Dmitry_Shevchenko [17]

The scientist who studies the earth constituent like solids, gas and liquid is called a geologist. Weathering and erosion are the correct blanks.

<h3>What are weathering and erosion?</h3>

The process of the deterioration of any solid particles like minerals, soils and rocks is called weathering. It occurs due to biochemical substances, atmospheric gases and water pressure.

The process of the transportation of the rocks and mineral particles away from their original position is called erosion it is due to forceful air and water.

The rocks moved from their original place to some another due to weathering and this process of their transportation is called erosion.

Therefore, <u>weathering </u>and <u>erosion </u>are the correct blanks.

Learn more about weathering and erosion here:

brainly.com/question/11712593

7 0
2 years ago
The continents of earth were clutered to gether in formation that a scientist named what
harkovskaia [24]

<u>Answer</u>:

the continents of earth were clustered together in formation that a scientist named Pangaea.

<u>Explanation</u>:

Before 300 million years ago, our earth was not made up of 7 different continent what we have now. Instead it was single huge mass land that was surrounded by a single ocean called  Panthalassa. A lot of  migration and collision lead to the formation of Pangaea. An Scientist named Albert Wegener gave the name Pangaea. Later, Pangaea was broken into  Gondwanaland and Laurasia.These Lands were then divided into 7 continents.

3 0
2 years ago
Other questions:
  • What are four ways you can separate mixture?
    10·2 answers
  • What kind of chemical bond is an insulator most likely to have?
    6·2 answers
  • What is the definition of a "saturated solution"?
    12·1 answer
  • (03.03 MC)
    6·1 answer
  • Which part of the electromagnetic spectrum has a lower frequency than visible light?
    5·2 answers
  • pH is a logarithmic scale used to indicate the hydrogen ion concentration, [H+], of a solution: pH=−log[H+] Due to the autoioniz
    11·1 answer
  • 12) A 17.92 g sample of copper was submerged in water, and the volume reading rose by 2.00 mL. What is the density of the copper
    12·1 answer
  • A car is traveling with an initial velocity of 15 m/s when the driver decides to go faster by accelerating at 5 m/s2 for 10 seco
    8·1 answer
  • 1 2 3 4 5 6 7 8 9 10 Suna passes an electric current through a sample of clear, colorless, and odorless liquid. As the experimen
    11·1 answer
  • What is one way humans can preserve biodiversity
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!