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
Dafna11 [192]
3 years ago
8

Calculate [OH−] for each solution.

Chemistry
1 answer:
Triss [41]3 years ago
6 0

Answer:

1.  [OH⁻] = 0.30 M ; 2. [OH⁻] = 1.54x10⁻⁶M ; 3. [OH⁻] = 1.32x10⁻¹³M

Explanation:

Remember the rule:

pH + pOH = 14

pOH = 14 - pH

10*⁻pOH (you have to elevate 10, to -pOH)

10*⁻pOH  = [OH⁻]

1. 14 - 13.48 = 0.52

10⁻⁰°⁵² = 0.30

2. 14 - 8.19 = 5.81

10⁻⁵°⁸¹ = 1.54x10⁻⁶

3. 14 - 2.12 = 12.88

10⁻¹²°⁸⁸ = 1.32x10⁻¹³

You might be interested in
Which of the below options is not a type of chemical bond?
sashaice [31]

Answer:

magnetic attraction

Explanation:

6 0
3 years ago
Use the ideal gas law to calculate the concentrations of nitrogen and oxygen present in air at a pressure of 1.0 atm and a tempe
notka56 [123]

Answer:

[N₂] = 0.032 M

[O₂] = 0.0086 M

Explanation:

Ideal Gas Law → P . V = n .  R . T

We assume that the mixture of air occupies a volume of 1 L

78% N₂ → Mole fraction of N₂ = 0.78

21% O₂  → Mole fraction of O₂ = 0.21

1% another gases  → Mole fraction of another gases = 0.01

In a mixture, the total pressure of the system refers to total moles of the mixture

1 atm . 1L = n . 0.082L.atm/mol.K . 298K

n = 1 L.atm / 0.082L.atm/mol.K . 298K → 0.0409 moles

We apply the mole fraction to determine the moles

N₂ moles / Total moles = 0.78 → 0.78 . 0.0409 mol = 0.032 moles N₂

O₂ moles / Total moles = 0.21 → 0.21 . 0.0409 mol = 0.0086 moles O₂

4 0
3 years ago
The diagram shows the process of photosynthesis. Which part represents an autotroph?
Naddik [55]

Answer:

A and B

Explanation:

The Sun's Energy is stored in the chemical bonds that make up food. Some forms of life make their own food. These are the Autotrophs.

Plants are autotrophs, which means they produce their own food.

3 0
2 years ago
Read 2 more answers
An area in the desert where water is found is known as an.
lbvjy [14]

Answer:

Oasis

Explanation:

An area in the desert that has water in it is called an oasis.

6 0
2 years ago
What happens to excess heat produced in the muscle during contraction and relaxation
Afina-wow [57]

Answer:

Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.

Explanation:

Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.

3 0
2 years ago
Other questions:
  • The rate of disappearance of HBr in the gas phase reaction 2HBr(g) → H2 (g) I2 (g) is 0.190 M s-1 at 150°C. The rate of appearan
    13·1 answer
  • In order for fusion to begin during the birth of a star there needs to be a certain amount of
    10·1 answer
  • In a piece of silver, where would you find the valence electrons?
    11·2 answers
  • The osmotic pressure of a saturated solution of strontium sulfate at 25 ∘C∘C is 21 torrtorr. Part A What is the solubility produ
    10·1 answer
  • Plz help quick
    13·2 answers
  • ILL IBE BRAINLY Asian Tsunami 2004:
    14·1 answer
  • An increase in the elevation, or altitude, of a land mass causes
    11·1 answer
  • Find the temperature from 150ml cylinder containing 0.75 moles gas at 153kpa.
    15·1 answer
  • How you could speed up the rate of dissolving when dying Easter eggs? The dye tabs are taking a long time to dissolve and evenly
    13·1 answer
  • A new penny has a mass of 2.49 g and a volume of 0.349 cm3. Is the penny made of pure copper?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!