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
STALIN [3.7K]
3 years ago
12

CORRECT ANSWER GETS BRAINLIEST!!!!!!!!!!!!

Chemistry
2 answers:
Mrac [35]3 years ago
8 0

Answer:

2, 4, 1, 3, 5

Explanation:

i believe is this a test

please mark this answer as brainlest i got the answer from someone by the way which is my sis

but forget all of that

please mark brainlest

Mama L [17]3 years ago
5 0
3,2,1,5,4 I’m pretty sure
You might be interested in
Identify and describe atom, element, compound and molecule of important in food science​
Y_Kistochka [10]

Answer:

an atom is the smallest particle of matter

a compound is a substance that has two or more atoms and element is the opposite of compound.

molecule is........,...............hope this helps

6 0
3 years ago
QUESTION 1
Svetlanka [38]

Answer:

C

Explanation:

Because nothing is left at the end of the reaction.

3 0
3 years ago
A mixture of benzoic acid and naphthalene was dissolved in tert-butyl methyl ether and the resulting solution was extracted with
Llana [10]

Answer:

C₆H₅COOH Benzoic Acid

Explanation:

Here we are using the extraction method to separate  benzoic acid from naphtalene in the  ether solution  by reacting it with the base sodium bicarbonate to produce the salt sodium benzoate  ( naphtalene remains in the organic layer )  .

The sodium benzoate  is completely soluble in the aqueous layer being a salt, and  reacts with hydrochloric acid ( again an acid base reaction ) which precipitates the benzoic acid  since the it is insoluble in water hence  separating it.

5 0
3 years ago
If a solution of HF (Ka=6.8×10−4) has a pH of 2.90, calculate the concentration of hydrofluoric acid.
fgiga [73]

Answer: 0.0023

Explanation:

I just answered this very same question. You can read my answer here: brainly.com/question/12077289.

1) First, you must write the balanced equilibrium equation, which will let you to determine the mole ratios of the different species in solution:

    HF ⇆ H⁺ + F⁻

Therefore, the mole ratio is: 1 HF: 1 H⁺ : 1  F⁻

2) Second, write the equilibrium constant of the acid, Ka, which will permit you to state the relationship of the concentrations in equilibrium:

        Ka = [H⁺] [F⁻] / [HF]

   [HF] is the searched concentration of the hydrofluoric acid

   From the mole ratio of the balanced chemical equation [H⁺] = [F⁻]

       Hence:

       Ka = [H⁺] [H⁺] / [HF] = [H⁺]² / [HF]

3) From the pH value you can calculate [H⁺],  using the definition:

  •    pH= - log [H⁺]
  •    Substitute: 2.90 = - log [H⁺]

 

 Clear [H⁺] using logarithm properties:

         [H^+]=10^{-2.90}=0.00126

4) Now you can substitute [H⁺] and the value of Ka in the equation for Ka:

   Ka = [H⁺]² / [HF] ⇒ [HF] = [H⁺]² / Ka = (0.00126)² / (6.8×10⁻⁴) = 0.00233.

Since the value of Ka has two significant figures, you must report the answer with two significan figures, i.e. 0.0023

7 0
3 years ago
2. Just like the N and S poles on bar
maksim [4K]

Answer:

A) attract

Explanation:

hope it helps you

3 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the wavelength of the photon that would be absorbed or emitted. Round your answer to 3 significant digits.
    7·1 answer
  • A liquid is placed in an evacuated, sealed flask. When will this closed system reach dynamic equilibrium?
    8·2 answers
  • Please help, need a correct answer asap!!
    10·1 answer
  • Why should we store Phosphorus in water​
    15·1 answer
  • Which of the following pairs does not share the same empirical formula?
    7·2 answers
  • The student is now told that the four solids, in no particular order, are aluminum chloride (AlCl3), sugar (C6H12O6), benzoic ac
    6·1 answer
  • 99<br> 96<br> 040Zr<br> +<br> 42He<br> ----&gt;<br> + "42Mo
    5·1 answer
  • Whoever awser correct I will give you Brainly
    13·1 answer
  • Juanita has done her experiment twenty times, and has gotten the same result every time. What would be the BEST thing for her to
    7·1 answer
  • Water, H2O, is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared __________
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!