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3 years ago

Which is an acceptable Lewis structure for a diatomic nitrogen molecule?

1 answer:

4 0

Answer:
Acceptable Lewis structure of Diatomic Nitrogen Molecule is as follow,

:N≡N:

Explanation:
The given lewis structure is acceptable because each nitrogen atom has a complete octet and and the formal charge of each nitrogen atom is zero. So those lewis structures which has zero or least formal charges are said to be more stable and acceptable. The formal charge is calculated is,

Formal Charge = # of Valence e⁻s - [# of non-bonded e⁻ + 1/2 # of bonded e⁻]

For N,

Formal Charge = 5 - [ 2 + 6/2]

Formal Charge = 5 - [ 2 + 3 ]

Formal Charge = 5 - 5

Formal Charge = 0

Same result will come for the second N atom.

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Calculate the approximate amount os sodium hydroxide needed to make 500ml if a. 3 naoh solution.

Rainbow [258]

6 gram of sodium hydroxide (NaOH) needed to make 500ml if 0.3 NaOH solution.

<h3>What is molarity? </h3>

Molarity (M) is the amount of a substance in a certain volume of solution.

Molarity is defined as the moles of a solute per liters of a solution.

The unit of molarity is mol/L.

Volume of NaOH = 500 mL

Molarity of the aqueous solution = 0.3 M

Molar mass of NaOH= (23+16+1) g = 40g

Let the mass of NaOH be X.

Now , according to formula number of moles of a given substance = given mass / molar mass

Therefore, no. of moles of NaOH = X/40

Since, molarity = number of moles of solute/ volume of solution in liter.

Hence, 0.3 = ( X /40) / (500 / 1000)

Solving this we get X= 6g

6 gram of sodium hydroxide (NaOH) needed to make 500ml if 0.3 NaOH solution.

Learn more about molarity, Here:

brainly.com/question/12127540

#SPJ4

8 0

2 years ago

1. Antoine Lavoisier, a French scientist, established which principle?

pickupchik [31]

Answer: The correct option is d.

Explanation: Antoine Lavoisier is a french scientist who discovered the role of oxygen in the process of combustion and respiration.

He was famous for the law of conservation of mass.

This law states that the total mass the reactant will equal to the total mass of the products in a chemical reaction.

For example: Combustion of methane

$CH_4+2O_2\rightarrow CO_2+2H_2O$

Mass of the reactants = $[12+4(1)]+[2(32)]=80g/mol$

Mass of the products = $[12+2(16)]+2[2(1)+16]=80g/mol$

Hence, every chemical reaction will follow law of conservation of mass.

6 0

3 years ago

Arrange the following molecules according to the strength of their dispersion forces.

Kitty [74]

<u>Answer:</u>

D<u>ispersion force :</u> is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make form temporary dipoles. This force is also called an induced dipole-induced dipole attraction because one molecule induce dipole in other molecule. London forces are the attractive forces that cause non polar substances to condense to liquids and to freeze into solids when the temperature is lowered sufficiently.

<u>Molecular size :</u>

•Larger and heavier atoms and molecules exhibit stronger dispersion forces than lighter and smaller ones.

•In a larger atom or molecule, the valence electrons are, farther from the nuclei than in a smaller atom or molecule. They are less tightly bounded and can more easily form temporary dipoles.

<u>Molecular shape: </u>

•At room temperature, neopentane (C5H12) is a gas whereas n-pentane (C5H12) is a liquid.

•London dispersion forces between n-pentane molecules are stronger than those between neopentane molecules even though both molecules are nonpolar and have the same molecular weight.

•The somewhat cylindrical shape of n-pentane molecules allows them to come in contact with each other more effectively than the somewhat spherical neopentane molecules.

so here ,

2 > 3 > 1 > 4 > 5 > 6

1st have more dispersion force because it is n heptane present in liquid form.

6th have lowest force because it is present in gaseous form.

7 0

3 years ago

0.00121 mol to grams

Gwar [14]

Answer: I believe the answer you are looking for is 0.02180

7 0

3 years ago

A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and fil