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
BlackZzzverrR [31]
2 years ago
12

The total number of electron pairs in a nitrogen molecules.is: a) 2 b) 3 c) 5 d) 7​

Chemistry
1 answer:
Mekhanik [1.2K]2 years ago
3 0

7

nitrogen's atomic no. is 7 which is the amount of protons and the amount of protons is equal to the amount of electrons

You might be interested in
What happens when the vapor pressure of a liquid is equal to the external pressure? The liquid freezes The intermolecular forces
Makovka662 [10]

Answer:

The liquid boils.

Explanation:

Vapor pressure is simply defined as the pressure exerted on a substance (solid/liquid) by the vapor of the substance collected just at the top of the surface of the substance. In concise words, it is the pressure of Vapor that is in contact with its solid or liquid state.

For a liquid, it is the pressure of the Vapor gathering at the top of the surface of the liquid.

When this Vapor pressure matches the external pressure, the temperature stays constant and the molecules of the liquid all through the liquid can gain enough energy, rise to the surface of the liquid and break free in gaseous form; thereby, boiling.

The definition of boiling point basically explains that it is the point at which temperature stays constant, and the vapour pressure of the liquid matches the atmospheric/external pressure around the liquid and its liquid molecules change into vapor.

This is why liquids boil faster at higher altitudes; the atmospheric pressure at higher altitudes is reduced, hence, the temperature at which liquid boils at this high altitude is normally lower than its known boiling point temperature.

It is also why food cooks to a temperature higher than the boiling point of water in a pressure cooker/pot. The added pressure ensures that the cooking water boils at temperatures higher than its boiling point; thereby exposing the cooking ingredients to a higher temperature, leading to faster cooking.

Hence, it is obvious why boiling is the answer to this question.

6 0
3 years ago
Phosphorus oxychloride has the chemical formula POCl3, with P as the central atom. In order to minimize formal charge, how many
Elina [12.6K]

Answer:

Phosphorus makes 5 bonds with other atoms

Explanation:

POCl_{3} has total 32 number of valence electrons (P has 5 , O has 6 and Cl has 7 valence electrons).

These valence electrons are used to draw Lewis structure of POCl_{3}.

Formal charge on an atom = (no. of valence electrons of the atom)-(no. of covalent bonds attached to the atom)-(no. of electrons in lone pair of the atom)

Applying octet rule (atoms have eight electrons in their valence shell) and minimizing formal charge of POCl_{3}, it has been found that P makes total 5 bonds with rest of the atoms.

Lewis structure of POCl_{3} along with formal charge (in parentheses) has been given below.

6 0
3 years ago
A flask containing 9.65 mL of liquid has a mass of 164.5g. The empty flask has a mass of 155.9 g. Calculate the density of the l
zlopas [31]

155.9

Explanation:

A flask containing 9.65 mL of liquid has a mass of 164.5g. The empty flask has a mass of 155.9

5 0
2 years ago
A blue solid X is soluble in water which method is used to obtain pure solid x from an aqueous solution
netineya [11]

Answer:

The answer is crystallisation

6 0
3 years ago
Read 2 more answers
The body’s pH is tightly regulated because specific enzymes function best within a narrow pH range. What is the approximate pH o
tatuchka [14]

Answer:

The answer to your question is pH = 9.08

Explanation:

Data

pH = ?

Concentration = 1.2 x 10⁻⁵ M

Process

1.- Calculate the pOH of the solution

Formula

   pOH = -log[OH⁻]

   pOH = -log[1.2 x 10⁻⁵]

   pOH = 4.92

2.- Calculate the pH

Formula

    pH = 14 - pOH

Substitution

    pH = 14 - 4.92

Result

    pH = 9.08    

5 0
3 years ago
Other questions:
  • For the reaction PCl5(g) + heat PCl3(g) + Cl2(g), what will happen when the temperature is decreased
    6·2 answers
  • How many pennies are in $10
    10·2 answers
  • Ammonia is produced from the reaction of nitrogen and hydrogen according to the following balanced equation:
    8·1 answer
  • For the reactionSO2(g) + NO2(g) SO3(g) + NO(g), the equilibrium constant is 18.0 at 1,200ºC. If 2.0 moles of SO2 and 2.0 moles o
    14·1 answer
  • The first method of determining the chemical composition of substances in space was to _____.
    6·1 answer
  • Describe the particles that make up a pure substance
    10·1 answer
  • Plzz help mee asapp dmxkxksms
    6·1 answer
  • The tire pressure in a automobile tire was 2.38 atm when the tire was at 26°C. As the automobile drove for several hours, the te
    12·1 answer
  • Uses of baking powder​
    11·2 answers
  • Please help???? i dont know this
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!