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
eduard
3 years ago
10

In the experiment "Beer-Lambert’s Law and Spectrophotometry", you prepared a calibration plot similar to the one pictured below.

What is the approximate concentration of a solution whose absorbance is 0.35?
Chemistry
1 answer:
dexar [7]3 years ago
8 0

Answer:

0.025M

Explanation:

As you must see in your graph, each concentration of the experiment has an absorbance. Following the Beer-Lambert's law that states "The absorbance of a solution is directely proportional to its concentration".

At 0.35 of absorbance, the plot has a concentration of:

<h3>0.025M</h3>
You might be interested in
It takes 495.0 kJ of energy to remove 1 mole of electron from an atom on the surface of sodium metal. How much energy does it ta
Zigmanuir [339]

Answer:

\lambda=241.9\ nm

Explanation:

The work function of the sodium= 495.0 kJ/mol

It means that  

1 mole of electrons can be removed by applying of 495.0 kJ of energy.

Also,  

1 mole = 6.023\times 10^{23}\ electrons

So,  

6.023\times 10^{23} electrons can be removed by applying of 495.0 kJ of energy.

1 electron can be removed by applying of \frac {495.0}{6.023\times 10^{23}}\ kJ of energy.

Energy required = 82.18\times 10^{-23}\ kJ

Also,  

1 kJ = 1000 J

So,  

Energy required = 82.18\times 10^{-20}\ J

Also, E=\frac {h\times c}{\lambda}

Where,  

h is Plank's constant having value 6.626\times 10^{-34}\ Js

c is the speed of light having value 3\times 10^8\ m/s

So,  

79.78\times 10^{-20}=\frac {6.626\times 10^{-34}\times 3\times 10^8}{\lambda}

\lambda=\frac{6.626\times 10^{-34}\times 3\times 10^8}{82.18\times 10^{-20}}

\lambda=\frac{10^{-26}\times \:19.878}{10^{-20}\times \:82.18}

\lambda=\frac{19.878}{10^6\times \:82.18}

\lambda=2.4188\times 10^{-7}\ m

Also,  

1 m = 10⁻⁹ nm

So,  

\lambda=241.9\ nm

6 0
3 years ago
Which orbital has the lowest energy
GalinKa [24]

Answer:

s orbital

Explanation:

it has the lowest energy because

Paulis law state that orbitals with lower energy must be fill first before that of higher energy

and the s orbital is filled first

5 0
3 years ago
___________ is a characteristic of a substance that's observed during a chemical reaction. *
Tju [1.3M]
Chemical property. Chemical property refers to the characteristic changed
3 0
3 years ago
38) Which of the following is not a reaction of alcohol
mylen [45]
<h2>I guess...</h2>

<h3>Dehydration </h3>
8 0
3 years ago
What is used to determine the number of each atom in an ionic formula?
Nutka1998 [239]

the oxidation state of each atom

3 0
3 years ago
Other questions:
  • A beaker contains a 25 mL solution of an unknown monoprotic acid that reacts in a 1:1 stochiometric ratio with NaOH. Titrate the
    5·1 answer
  • The average air tempature in an area over a long period of time is called
    8·2 answers
  • How does changing the temperature affect the chemical reaction?
    9·1 answer
  • How many grams of nano3 remain in solution at 20 ∘c?
    13·1 answer
  • An "empty" container is not really empty if it contains air. How may moles of nitrogen are in an "empty" two-liter cola bottle a
    7·1 answer
  • If a parent cell has 23 chromosomes and reproduces asexually through mitosis,how many chromosomes will each of its daughter cell
    7·1 answer
  • How many moles of iron is 6.022 x 10^22 atoms of iron? (Report answer as a number rounded to one place past the decimal.) *
    8·1 answer
  • You titrate 25.00 ml of 0.1894 M acetic acid with 0.2006 M NaOH. How many ml of NaOH (to four significant figures) will be requi
    9·1 answer
  • why is it harder to remove an electron from fluorine than from carbon? to put it another way, why are the outermost electrons of
    15·1 answer
  • It was observed that magnesium sulphate was present in tap water ,which hardness might that be​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!