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
stiv31 [10]
1 year ago
13

What is the energy of a photon of infrared radiation with a frequency of 2.53 × 1012 Hz? Planck’s constant is

Chemistry
1 answer:
Novosadov [1.4K]1 year ago
6 0
It is letter b or c nit d
You might be interested in
6
xxTIMURxx [149]

Answer:

a

Explanation:

5 0
3 years ago
Calculate the pH of a solution that is 0.205M benzoic acid and 0.230M sodium benzoate, a salt whose anion is the conjugate base
pickupchik [31]

Answer:

pH = 4.25

Explanation:

A solution composed of a weak acid and its conjugate base is a <em>buffer solution</em>. To calculate the pH of a buffer solution we use the Henderson-Hasselbach equation:

pH = pKa + log ([conjugate base]/[weak acid]

In this case, we have the following data:

[conjugate base] = [sodium benzoate] = 0.230 M

[weak acid] = [benzoic acid] = 0.205 M

The pKa of benzoic acid is 4.2. So, we introduce the data in the equation:

pH = 4.2 + log (0.230 M/0.205 M) = 4.2 + 0.050 = 4.25

4 0
3 years ago
What volume will water vapor form when 40 liters of hydrogen completely reacts with 25 liters of oxygen? Assume the temperature
Brut [27]
                                                             2H2           +           O2 ---->2H2O  
number of moles in reaction                 2 mol                  1 mol       2 mol
number of liters in the reaction         2*22.4 L                1*22.4 L    2*22.4L
We can see that volumes of the gases are proportional to coefficients in the reaction ( if gases are under the same conditions), so we can write

                              2H2           +           O2 ---->2H2O  
                               2 L                         1 L          2 L
     given                 40 L                      ( 25 L)     40 L

We can see that we have excess of O2,
because if 2 L H2 are needed 1 L O2, then 40 L of H2 are needed 20 L O2.

So, limiting reactant is H2, and we will need to calculate Volume of H2O using H2.
2L H2 give 2L H2O(gas), so 40 L H2 give 40 L H2O.
7 0
3 years ago
What do you mean by ductility?​
laiz [17]

Ductility is the ability of a material to be remoulded to a force applied to it without breaking.

e.g copper electronic wires

8 0
3 years ago
The air temperature surrounding a snowy driveway is 0ºC. One side of the driveway is shaded, while the other side is sunny. The
ICE Princess25 [194]

Answer:

The snow absorbed radiant energy to produce a physical change.

Explanation:

8 0
3 years ago
Other questions:
  • Calculate the ratio of H+ ions to OH– ions at a pH = 6. Find the concentration of H+ ions to OH– ions listed in Table B of your
    12·2 answers
  • Creativity plays a vital role in science. In what aspects of science is creativity involved? A. Designing experiments B. Formula
    13·2 answers
  • In Ray Bradbury's 1953 novel Fahrenheit 451, 451°F is said to be the temperature at which books, which have been banned in the
    12·1 answer
  • Name the following Compounds<br> Alkane C-C
    8·1 answer
  • Select the correct answer.
    6·1 answer
  • The vapor pressure of a system at equilibrium
    10·1 answer
  • Identify the major force between molecules of pentane and hexane
    14·1 answer
  • One method for preparing a nitrile is the dehydration of a primary amide.
    7·1 answer
  • Which of these is an example of chemical change
    12·1 answer
  • An atom has the following electron configuration.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!