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Zanzabum
3 years ago
15

What type of elements generally bond covalently, and how do they satisfy the octet rule?

Chemistry
1 answer:
Alex Ar [27]3 years ago
3 0

Answer:

Covalent, or, elements on the right side of the ladder (on the periodic table). Covalent compounds satisfy the octet rule by sharing electrons.

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A student has two solutions of a substance. Solution-1: 25M, 400mL, and Solution-2: 30M, 300 ml. What is the molarity of the fin
castortr0y [4]

Answer:

The molarity of the final solutions if these two solutions are mixed is 27.14 \frac{moles}{L}

Explanation:

Yo know:

  • Solution-1: 25M, 400mL
  • Solution-2: 30M, 300 mL

Molarity being the number of moles of solute per liter of solution, expressed by:

Molarity (M)= \frac{number of moles}{volume}

You can determine the number of moles that are mixed from each solution as:

Number of moles= Molarity*Volume

So, being 1 L=1000 mL, for each solution you get:

  • Solution-1: being 0.400 L=400 mL ⇒ 25 M* 0.400 L= 10 moles
  • Solution-2: being 0.300 L=300 mL ⇒ 30 M* 0.300 L=  9 moles

When mixing both solutions, it is obtained that the volume is the sum of both solutions:

Total volume= volume solution-1 + volume solution-2

and the number of total moles will be the sum of the moles of solution-1 and solution-2:

Total moles= moles of solution-1 + moles of solution-2

So the molarity of the final solution is:

Molarity (M)= \frac{moles of solution 1 + moles of solution 2}{Volume solution 1 + Volume solution 2}

In this case, you have:

  • moles of solution-1: 10 moles
  • moles of solution-2: 9 moles
  • volume solution-1: 0.400 L
  • volume solution-2: 0.300 L

Replacing:

Molarity (M)=\frac{10 moles + 9 moles}{0.400 L + 0.300 L}

Solving:

Molarity (M)=\frac{19 moles}{0.700 L}

Molarity= 27.14 \frac{moles}{L}

<u><em>The molarity of the final solutions if these two solutions are mixed is 27.14 </em></u>\frac{moles}{L}<u><em></em></u>

4 0
3 years ago
Which statement is not true about the periodic table?
Crazy boy [7]
Answer is A
All elements on the periodic table have a different number of protons that can be represented by its atomic number
4 0
2 years ago
How do forces in nuclear and chemical reactions differ
marusya05 [52]

1) Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei. ... (3) Rates of chemical reactions are influenced by temperature and catalysts.

8 0
3 years ago
Read 2 more answers
What is the Lewis dot diagram structure for PI2F
Brut [27]

Answer:

Please find attached the completed Lewis dot diagram structure for PI₂F

Explanation:

The number of valence electrons are;

Phosphorus = 5 Electrons

Iodine = 2 × 7 electrons = 14 electrons

Chlorine = 7 electrons

The total number of valence electrons = 14 + 7 + 5 = 26 electrons

2) We draw the symbol that represents the basic (general) structure of the molecule as follows;

The sheared electron pair are represented by single bond lines

3) We complete the octet structures round the fluorine and the iodine atoms as attached showing 18 electrons plus 6 shared electron pairs, with a maximum from step 2 to give a total of (18 + 6) 24 electron pairs

4) We add the 2 unaccounted valence electron on the phosphorus atom to give it the stable octet structure, which gives the completed Lewis structure

3 0
3 years ago
2. Which of the following does not have a nucleus? a. prokaryotes b. eukaryotes c. prokaryotes and eukaryotes ​
qwelly [4]

Answer:

Erythrocytes

Erythrocytes do not contain a nucleus. This would make answer choice "A" correct. Erythrocytes are red blood cells and these cells differ from the other cells of the body because of the absence of the nucleus. All the other cells noted have nuclei.

Explanation:

Have A Wonderful Day !!

3 0
3 years ago
Read 2 more answers
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