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
goldenfox [79]
3 years ago
12

4. A new compound X has been made, and a 5 x 10-4 Molar solution of it gives an absorbance of 0.405 at the maximum absorbance of

265 nm. The path length of the UV cell is 0.5cm.
Use Beer’s Law to calculate the Molar Absorptivity coefficient of Compound X at this wavelength, quoting the correct units.
Chemistry
1 answer:
vesna_86 [32]3 years ago
4 0

Answer:

1620 cm⁻¹·M⁻¹

Explanation:

<em>Beer's Law </em>states that:

A = ε * b * C

Where A is the absorbance, ε is the Molar Absorptivity coefficient, b is the path length, and C is the molar concentration.

<u>Use the given data</u>:

0.405 = ε * 0.5 cm * 5x10⁻⁴ M

And <u>solve for ε</u>:

ε = 1620 cm⁻¹·M⁻¹

So the Molar Absorptivity coefficient of Compound X at this 265 nm is 1620 cm⁻¹·M⁻¹.

You might be interested in
Dissolving salt in water reduces the intermolecular forces between water molecules. What most likely happens to the surface tens
Svetllana [295]

If we dissolve salt in water they will reduce the intermolecular forces between water molecule and this will decrease the surface tension.

Surface tension is due to cohesive forces (the forces between molecules of same substance) hence as cohesive forces decreases the surface tension also decreases

7 0
4 years ago
Read 2 more answers
A metal pellet with a mass of 100.0 g, originally at 116°C, is dropped into a cup of water, initially at
Alina [70]

Answer:

C, 42g

Explanation:

In thermal equilibrium, both bodies (metal pellet and water) both have the same final temperature (46.3°C).

Assuming no heat is lost to surroundings,

the energy lost from metal pellet = energy gained for water

Since E = mc∆T

(energy = mass x specific heat capacity x temperature change)

mc∆T (metal pellet) = mc∆T (water)

100 x 0.568 x (116-46.3) = m 4.184 (46.3 - 23.8)

3958.96 = 94.14m

m = 42g

6 0
3 years ago
Explain in YOUR words what factors determine which type of fossil fuel forms; coal, oil, or gas.
MariettaO [177]

Answer:  three very important kinds of things: coal, oil, and natural gas.

Explanation:

8 0
3 years ago
18. What is the percent by mass sugar of a solution made by dissolving 12.45 grams of sugar in 100 grams of water?
Fantom [35]

The percent by mass sugar of a solution : 11.07%

<h3>Further explanation</h3>

Given

mass of sugar = 12.45 g

mass of water = 100 g

Required

The percent by mass

Solution

Mass of solution :

\tt mass~sugar+mass~water=12.45+100=112.45~g

Percent mass of sugar :

\tt \%mass=\dfrac{mass~sugar}{mass~solution}\times 100\%\\\\\%mass=\dfrac{12.45}{112.45}\times 100\%=11.07\%

6 0
3 years ago
An atom of which of these elements most likely forms an anion? A. AI B. Br C. Ca D. Mg
Papessa [141]
The answer is B. A good way determine this is how far right the element is on the periodic table. The further right the element is, the more electronegative it is meaning it is more willing to accept an electron. This can be explained using the valence electrons and how many need to be added or removed to complete the octet. The further right you are, the easier it is for the element to just gain a few electrons instead of loose a bunch. Noble gases are the exception to this since they don't normally react though.
4 0
3 years ago
Read 2 more answers
Other questions:
  • A scientist found the fossilized remains of a modern badger species in a new layer of sedimentary rock. The fossil was dated to
    10·2 answers
  • Column A
    11·1 answer
  • How many energy levels dose a tungsten atom have?
    15·1 answer
  • BRAINLIEST ASAP! PLEASE HELP ME :)<br><br> What ancient Greek theory did Robert Boyle help dispel?
    15·1 answer
  • if you ride your bike around the block, returning to the exact point where you started, your displacement is ____m?
    5·1 answer
  • Bond length is the distance between the centers of two bonded atoms. On the potential energy curve, the bond length is the inter
    7·1 answer
  • An atom has a mass number of 9 and 5 neutrons. What is its atomic number? A 19 B. 14 O c.4 D. 11 SN​
    12·2 answers
  • Which drug is derived from the hemp plant?
    13·1 answer
  • What are the products of <br> C6 H12 + 9O2 <br> ?
    5·1 answer
  • .25 g of each of the following gasses are taken at 27°C and 600 mm
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!