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
Veronika [31]
4 years ago
15

Help me please............…

Chemistry
1 answer:
Simora [160]4 years ago
5 0

Answer:I think this is right: 1. 6 2. 12 3. 4 4. In the middle 5. Carbon 1. The one on the right 2a. Beryllium 2b. Aluminium

Explanation:The protons are the circles with plus signs and the black ones are nutrons. I looked on my periodic table for the rest.

You might be interested in
Which is correct for kinetic particle theory. (It can be all correct or 2 of them correct)
alisha [4.7K]

The answer is that all of them are correct.

7 0
4 years ago
Draw the structural formula of the major product of the reaction of (S)-2,2,3-trimethyloxirane with MeOH, H . Use the wedge/hash
Katarina [22]

Answer:

(S)-3-methoxy-3-methylbutan-2-ol

Explanation:

In this case, we have an <u>epoxide opening in acid medium</u>. The first step then is the <u>protonation of the oxygen</u>. Then the epoxide is broken to generate the most <u>stable carbocation</u>. The nucleophile (CH_3OH) will attack the carbocation generating a new bond. Finally, the oxygen is <u>deprotonated</u> to obtain an ether functional group and we will obtain the molecule <u>(S)-3-methoxy-3-methylbutan-2-ol</u>.

See figure 1

I hope it helps!

8 0
4 years ago
How many grams of CaCl2would be dissolved in 1.0 L of a 0.10M<br> solution of CaCl2?
Goryan [66]
Mass of CaCl2=11g
I hope this one is help you

3 0
3 years ago
Hydrofluoric acid, hf, has a ka of 6.8 × 10−4. what are [h3o+], [f−], and [oh−] in 0.710 m hf?
STALIN [3.7K]

Answer:

[H₃O⁺] = [F⁻] = 2.2 x 10⁻² M. & [OH⁻] = 4.55 x 10⁻¹³.

Explanation:

  • For a weak acid like HF, the dissociation of HF will be:

<em>HF + H₂O ⇄ H₃O⁺ + F⁻.</em>

[H₃O⁺] = [F⁻].

<em>∵ [H₃O⁺] = √Ka.C,</em>

Ka = 6.8 x 10⁻⁴, C = 0.710 M.

∴ [H₃O⁺] = √Ka.C = √(6.8 x 10⁻⁴)(0.710) = 2.197 x 10⁻² M ≅ 2.2 x 10⁻² M.

<em>∴ [H₃O⁺] = [F⁻] = 2.2 x 10⁻² M.</em>

<em></em>

∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

<em>∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺]</em> = 10⁻¹⁴/(2.2 x 10⁻²) = <em>4.55 x 10⁻¹³.</em>

6 0
3 years ago
Calcium (#20) can be found in which group in the periodic
LUCKY_DIMON [66]

Answer:

Alkaline earth metals

Explanation:

Calcium (Ca) is a silvery-white soft metal that has the atomic number 20 in the periodic table. It is an Alkaline Earth Metal and is located in Group 2 of the periodic table. It has the symbol Ca.

5 0
3 years ago
Other questions:
  • An experiment in chm 2045 requires students to prepare a 1.0 M aqueous solution of potassium phosphate.Jennifer fills a 1.0 lite
    9·1 answer
  • Classify each of the following properties by writing physical or chemical matter
    12·1 answer
  • The density of an aqueous solution of sulfuric acid is 1.36 g/mL and the concentration is 3.43 M. What is the concentration of
    13·1 answer
  • A compound is formed when 171.2g of carbon reacts with 28.8 g of hydrogen what is the mass percent of hydrogen in the compound
    5·2 answers
  • How to calculate the percentage of a anhydrous salt
    14·1 answer
  • which two elements are most likely to form an ionic bond? krypton and lithium, magnesium and silicon, calcium and potassium, iod
    10·1 answer
  • PLEASE HELP ASAP!!! science
    14·2 answers
  • How are producers and consumers related?
    14·2 answers
  • The molecule
    5·1 answer
  • The colourlcas liquid was added to an hydrious iron (II) chloride. (1) State what was observed. e 6 Write jouic equatico for the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!