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
nordsb [41]
2 years ago
12

What is the frequency of light with a wave- length of 4.0 ×10−7 m?

Chemistry
1 answer:
Kisachek [45]2 years ago
7 0

7.5x10^14 Hz. I just worked it out on paper.

You might be interested in
Which is the best example of how electromagnetic energy is used in everyday life?
Sever21 [200]
A patient receiving an X-ray in a hospital
4 0
3 years ago
How does your Skeletal and Muscular Systems work together?
elena-s [515]

Answer:

Answer would be A, Muscles move your bones

Explanation:

Without the Muscular System, your bones would not be connected properly

3 0
3 years ago
Read 2 more answers
For the generic equilibrium HA(aq) ⇌ H+(aq) + A−(aq), which of these statements is true? For the generic equilibrium , which of
timama [110]

<u>Answer:</u> The correct statement is if you add the soluble salt KA to a solution of HA that is at equilibrium, the pH would increase.

<u>Explanation:</u>

Common ion effect is defined as the effect which occurs on equilibrium when a common ion (an ion which is already present in the solution) is added to a solution. This effect generally decreases the solubility of a solute.

Equilibrium reaction of HA and KA follows the equation:

HA\rightleftharpoons H^{+}(aq.)+A^{-}(aq.)

KA\rightleftharpoons K^+(aq.)+A^{-}(aq.)

According to Le-Chateliers principle, if there is any change in the variables of the reaction, the equilibrium will shift in the direction in order to minimize the effect.

In the equilibrium reactions, A^- ion is getting increased on the product side, so the equilibrium will shift in the direction to minimize this effect, which is in the direction of HA.

Thus, the addition of KA will shift the equilibrium in the left direction.

Equilibrium constant depends on the temperature of the system. It does not have any effect on any change of pH.

pH is defined as the negative logarithm of hydrogen ions present in the solution

  • If the solution has high hydrogen ion concentration, then the pH will be low.
  • If the solution has low hydrogen ion concentration, then the pH will be high.

As, the equilibrium is shifting in the left direction, that means concentration of H^+ ions are getting decreases. This will increase the pH of the solution.

Hence, the correct statement is if you add the soluble salt KA to a solution of HA that is at equilibrium, the pH would increase.

8 0
3 years ago
What is the volume occupied by 30.00 grams of pure gold?​
mr Goodwill [35]

Answer:

I think 1.56

Explanation:

3 0
3 years ago
What is the volume of 0.120 g of C2H2F4<br> vapor at 0.970 atm and 22.4°C?<br> Answer in units of L.
ludmilkaskok [199]

Answer:

V= 0.031L

Explanation:

P= 0.97atm, V= ?, n= 0.12/98 =0.00122mol, R= 0.082, T= 22.4+273= 295.4

Applying

PV=nRT

0.970×V = 0.00122×0.082×295.4

Simplify the above equation

V= 0.031L

6 0
2 years ago
Other questions:
  • What are the two parts of a phospholipid
    10·1 answer
  • An acid-base titration is a neutralization reaction performed to determine: the concentration of an unknown acid based upon the
    11·1 answer
  • Can someone help me with the question in the image. if it is correct i will mark as brainliest
    11·1 answer
  • At a certain temperature, ethane has a vapor pressure of 304 torr and propane has a vapor pressure of 27 torr. What is the mole
    15·1 answer
  • What does centripetal force mean?
    8·1 answer
  • Balance the following redox equation, identifying the element oxidized and the element reduced. Show all of the work used to sol
    11·1 answer
  • What is nitrogen???? explain!!! ​
    5·2 answers
  • How many milliliters of a 0.40%(w/v) solution of nalorphine must be injected to obtain a dose of 1.5 mg?
    7·1 answer
  • How to solve x² in differential​
    6·1 answer
  • What structure do bacteria cells have
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!