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
Lorico [155]
3 years ago
9

What is the [OH-] in a solution with a pol of 7.86?

Chemistry
1 answer:
yulyashka [42]3 years ago
3 0

Answer:

pH of 7.86, then the [OH-] is equal to 10^(14-7.86) = 10^6.14 M

Explanation:

You might be interested in
What is the difference between continuous and discontinuous variation?
jonny [76]
The difference between the two is that the values in discontinuous variation are fixed, while the values in continuous variation can be changed. :)
5 0
3 years ago
At 2°C, the vapor pressure of pure water is 23.76 mmHg and that of a certain seawater sample is 23.09 mmHg. Assuming that seawat
wariber [46]

Answer:

0.808  M

Explanation:

Using Raoult's Law

\frac{P_s}{Pi}= x_i

where:

P_s = vapor pressure of sea water( solution) = 23.09 mmHg

P_i = vapor pressure of pure water (solute) = 23.76 mmHg

x_i = mole fraction of water

∴

\frac{23.09}{23.76}= x_i

x_i = 0.9718

x_i+x_2=1

x_2 = 1- x_i

x_2 = 1- 0.9718

x_2 = 0.0282

x_i = \frac{n_i}{n_i+n_2}  ------ equation (1)

x_2 = \frac{n_2}{n_i+n_2}  ------ equation (2)

where; (n_2) = number of moles of sea water

(n_i) = number of moles of pure water

equating above equation 1 and 2; we have :

\frac{n_2}{n_i}= \frac{0.0282}{0.9178}

= 0.02901

NOW, Molarity =  \frac{moles of sea water}{mass of pure water }*1000

= \frac{0.02901}{18}*1000

= 0.001616*1000

= 1.616 M

As we assume that the sea water contains only NaCl, if NaCl dissociates to Na⁺ and Cl⁻; we have \frac{1.616}{2} =0.808 M

3 0
3 years ago
Read 2 more answers
The following reaction is exothermic. C6H12O6(s)+6O2(g)⇌6CO2(g)+6H2O(g)C6H12O6(s)+6O2(g)⇌6CO2(g)+6H2O(g) Predict the effect (shi
Zigmanuir [339]

Answer:

According to Le Chatelier's principle, increasing the reaction temperature of an exothermic reaction causes a shift to the left and decreasing the reaction temperature causes a shift to the right.

Explanation:

C6H12O6(s) + 6O2(g) ⇌6CO2(g) + 6H2O(g)

We are told that the forward reaction is exothermic, meaning heat is removed from the reacting substance to the surroundings.

According to Le Chatelier's principle,

1. for an exothermic reaction, on increasing the temperature, there is a shift in equilibrium to the left and formation of the product is favoured.

2. if the temperature of the system is decreased, the equilibrium shifts to right and the formation of the reactants is favoured.

3. if the reaction temperature is kept constant, the system is at equilibrium and there is no shift to the right nor to the left.

6 0
3 years ago
Read 2 more answers
Acids react with
Verdich [7]
Water is produce bases and says
6 0
3 years ago
Imagine that you are playing a game of Clue in which Mrs. White is killed in the conservatory. You have a device in each room to
myrzilka [38]

Answer:

  • <u><em>Mr. Plum</em></u><em> killed Mrs. White.</em>

Explanation:

<u>1) Wavelengths for the different light colors (visible light) and related character:</u>

Color  Wavelength          related character

Violet  380–450 nm  ← Professr Plum

Blue  450–485 nm  ← Mrs. Peacock

Cyan  485–500 nm  

Green  500–565 nm  ← Mr. Green

Yellow  565–590 nm  ← Colonel Mustard

Orange  590–625 nm  

Red  625–740 nm  ← Miss Scarlet

<u>2) At the time of the murder, the spectrometers recorded:</u>

a) In the <em>dining room</em>: <em>520 nm</em>.

520 nm is in the range 500 - 565 nm, which is the range for green color, so <em>Mr. Green</em> was in the dining room and is no more a suspect.

b)<em> In the lounge and study: lower frequencie</em>s.

Since frequency and wavelength are inversely related, the wavelengths in the longe and study have to be of <em>yellow and red</em> colors, which are the only two with longer wavelengths from the option given.

Then, <em>Mustard and Scarlet</em> are not criminal.

c)<em> In the library: the second shortest wavelength of the five recorded. </em>

<em />

The second shortest wavelength, as per the table, is that of <em>blue </em>color. So, <em>Mrs. Peacock</em> is not the killer.

The only left option is violet, so Mr. Plum is the only who could be at the conservatory and he is the killer.

7 0
3 years ago
Other questions:
  • What role does the mantle play in the rock cycle?
    15·2 answers
  • What is the ph of a buffer that consists of 0.45 m ch3cooh and 0.35 m ch3coona? ka = 1.8 × 10–5?
    6·1 answer
  • 1
    11·1 answer
  • What Is Oxidation Reaction
    6·1 answer
  • The average human body temperature is 98.6 °
    12·1 answer
  • Of the atoms below, __________ is the most electronegative.<br> PLZ HELP I'LL AWARD BRINLIEST.
    6·1 answer
  • How many molecules are in 92.9 g of NaOH?​
    14·1 answer
  • 15 points <br> Discuss how cells differ from one another
    9·1 answer
  • What is the percent composition of C4H10? (4 points)
    6·1 answer
  • How are viscosity and flow rate similar
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!