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
Archy [21]
3 years ago
5

I need help!!! Calculating pH, pOH, [H+] and [OH-]

Chemistry
1 answer:
Advocard [28]3 years ago
4 0
Find the hydroxide ion concentration of a solution with a pOH of 5.90. To solve this, use a scientific calculator and enter 5.90 and use the +/- button to make it negative and then press the 10x key.
You might be interested in
How many oxygen atoms are there in 582 grams of caffeine (CH10N402, 194 g/mol)? Avogadro's Number: 1 mole = 6.02 x 1023 species
Sergeu [11.5K]

Answer:

3.61 * 10 ²⁴atoms.

Explanation:

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

From the question ,

w = 582 g

m = 194 g/mol

The number of moles can be calculated from the above formula , and substituting the respective values ,

n = w / m  = 582 g / 194 g/mol  =  3 mol

In the molecular formula of caffeine ,

<u>In 1 mole of caffeine their are - 2 moles of Oxygen. </u>

Therefore , in  3 moles of Caffeine there will be 6 moles of oxygen.

As well know ,

one mole of any substance contains 6.023*10²³ atoms,

Therefore , in  6 mol of oxygen =  6 * 6.023*10²³ atoms  = 3.61 * 10 ²⁴atoms.

8 0
3 years ago
How many atoms of oxygen (o)are present 2naOH+H2SO4 2H2O+Na2SO4
Dafna1 [17]

Answer:

10

Explanation:

6 0
3 years ago
6. Which of the following labels for the picture below is correct? a) Solute + solvent = solution b) Solvent + solute = saturati
SVETLANKA909090 [29]

Answer:

answer is a since solute dissolve a solvent to give a solution

4 0
3 years ago
Why is there DNA in our food?
sukhopar [10]

Answer:

probably because most of our food comes from animals-

Explanation:

3 0
3 years ago
Read 2 more answers
Which statement explains why catalysts are important for living
Marina86 [1]

Answer:

Catalysts allow chemical reactions to occur at temperatures at which the organism lives.

Explanation:

Catalysts are molecules that speeden the rate of chemical reaction by lowering the activation energy of the reaction. In a living system, the catalyst are ENZYMES, which help to hasten up many biochemical reactions.

Another function of catalyst in living systems is that it allows chemical reactions to occur at temperatures at which the organism lives.

8 0
3 years ago
Other questions:
  • Calculate the molar mass of aluminum oxide (Al2O3). Express your answer to four significant figures.
    8·1 answer
  • What’s the best answer
    14·1 answer
  • What is the difference between the energy of spring A, stretched 0.6 meters, and spring B, stretched 0.3 meters, if they have th
    8·1 answer
  • How many moles of water are produced from 2 moles of oxygen gas
    15·1 answer
  • The following reaction was carried out in a 3.25 L reaction vessel at 1100 K:
    10·1 answer
  • Can someone please help me?
    8·1 answer
  • Which of the following is not a reason to use an alloy instead of a pure metal?
    14·2 answers
  • How can the periodic table be used to infer the number of valence electrons in an atom?
    10·1 answer
  • What is the periodic table element for Iron?
    6·2 answers
  • How many neutrons does this atom have?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!