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
Sever21 [200]
3 years ago
7

At 25 °c, what is the hydroxide ion concentration, [oh–], in an aqueous solution with a hydrogen ion concentration of [h ] = 3.0

× 10–5 m?
Chemistry
1 answer:
chubhunter [2.5K]3 years ago
5 0

As,

Water has a pkw=14

so it can be represented as,

[H+] [OH-] = 1*10^-14

If [H+] = 3*10^-5M

[OH-] = (1*10^-14) / ( 3*10^-5)

[OH-] = 3.3*10^-9 M

You might be interested in
If a radioactive material has a 10 year half-life, how much of a 100 g sample will be left after 30 years?
olga_2 [115]
12.5g, each 10 years you lose a half of what you have at that given moment

5 0
3 years ago
The bonds of four salts (MgBr2, NaCl, MgCl2, and NaBr) are evaluated for ionic character based on electronegativity differences
sammy [17]

Answer:

MgBr2 < MgCl2 < NaBr < NaCl

Explanation:

In order to determinate ionic character, we have to subtract the electronegativity from the elements involved. This is known as Pauling rule.

MgBr2 > ΔΕΝ = 1.8

NaCl > ΔΕΝ = 2.3

MgCl2 > ΔΕΝ = 2

NaBr > ΔΕΝ = 2.1

6 0
3 years ago
What effect does pneumonia have on the diffusion of O2 and CO2 across the membranes in the lungs? a. slows diffusion b. complete
GarryVolchara [31]

Answer:

a. slows diffusion

Explanation:

Gas exchange on respiratory surfaces in the body (the lungs) occurs through a process known as diffusion. Blood which is low in oxygen and high in carbondioxide (carried from cells) goes through an exchange in the lung's alveoli (where oxygen concentration is high and carbondioxide is low). The oxygen in the alveoli diffuses into the blood, while the carbondioxide in the blood diffuses into the alveoli. This diffusion is possible because of the concentration gradient across the membranes.

Pneumonia is the inflammation of the lungs due to injury or infection. Liquid (pus) accumulates in the alveoli (a natural immune response to the infection or injury), a condition known as pulmonary edema which makes it harder for gases to be exchanged between the blood and the alveoli, thereby making breathing difficult. This slows down diffusion and if the condition is severe enough, can cause a respiratory failure where oxygen levels in the blood are critically low and carbondioxide levels are very high.

5 0
3 years ago
A piece of copper is 2x2x4 cm and has a mass of 142, what is the density of copper
ohaa [14]

Answer:

Demisty = mass/volume = 142/ (2×2×4) = 142 / 16 =

8.875g/cm^3

Explanation:

3 0
3 years ago
Maltase is an enzyme that breaks down maltose. If a maltase enzyme has just completed catalyzing the decomposition of maltose, t
netineya [11]
Yes it is available. It will continue catalyzing the reactions until it becomes completely consumed. That's how enzymes work. They work and are eventually consumed in the process completely without altering the reaction in any way other than speeding it up.
<span />
7 0
3 years ago
Other questions:
  • Acid-catalyzed dehydration of secondary and tertiary alcohols proceeds through an E1 mechanism. The first step is the protonatio
    14·1 answer
  • In its aqueous solution, 32% of a substance dissociates to release hydroxide ions. Which of the following is true for the substa
    13·1 answer
  • What is the uncertainty for each of the following numbers? a) 65.74 b) 60.009 c) 66_ _d) 65.750
    5·1 answer
  • If the male monster has a genotype of HH, will he have horns?<br> yes or no
    10·2 answers
  • Please help me...thank you so much..
    6·1 answer
  • Which of the following single replacement reactions will take place?
    8·1 answer
  • Need help on 1-10. for chemistry
    6·1 answer
  • Which factor affects the amount of gravitational potential orgy at object but
    11·2 answers
  • ________ are __________ for inherited traits. <br> PLSS ANSWER ASAP I BEG
    15·1 answer
  • Molecules of ice have less mass than molecules of water. True or False
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!