All categories

2 years ago

How many valance are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride?

2 answers:

5 0

3 valence electrons are transferred in the formation of the compound potassium nitride because nitrogen needs 3 valence electron to become stable, or to have the electron configuration of noble Gases.

yulyashka [42]2 years ago

3 0

Nitrogen requires 3 electrons to have a total of 8 valence electrons.Each potassium atom will transfer one electron.A total of 3 potassium atoms and one nitrogen atom will be involved in the formation of a formula unit of potassium nitride.

You might be interested in

The chemical equation, Cr + Fe(NO3)2 → Fe + Cr(NO3)3, is an example of which type of reaction?

Angelina_Jolie [31]

Answer:

Redox type

Explanation:

The reaction is:

2Cr + 3Fe(NO₃)₂ → 2Fe + 2Cr(NO₃)₃

2 moles of chromium can react to 3 moles of iron (II) nitrate in order to produce 2 moles of iron and 2 moles of chromium nitrate.

If we see oxidation state, we see that chromium changes from 0 to +3

Iron changed the oxidation state from +2 to 0

Remember that elements at ground state has 0, as oxidation state.

Iron is being reduced while chromium is oxidized. Then, the half reactions are:

Fe²⁺ + 2e⁻ ⇄ Fe (Reduction)

Cr ⇄ Cr³⁺ + 3e⁻ (Oxidation)

When an element is being reduced, while another is being oxidized, we are in prescence of a redox reaction.

8 0

2 years ago

Arkeisha and Rodney are having a discussion about the correct use of the term "battery acid." Arkeisha insists that an alkaline

mote1985 [20]

Arkeisha is correct because the fluid in an alkaline battery has a ph between 7.1 and 14.0

8 0

2 years ago

Classify the reaction that makes a firefly glow in terms of energy input and output

user100 [1]

It glow, so light energy go out of the system, exotermic

4 0

2 years ago

What is the density ρh of hot air inside the balloon? assume that this density is uniform throughout the balloon. express the de

enyata [817]

Answer 1) : The density of the hot air inside the balloon can be found out by using ideal gas equation;

PV = nRT;

As n is number of moles and in gases, number of moles along with mass per mole is equal to the density of the gas.

If the moles in the gas are more the density will be more.

here, density (ρ) = mass (m) / volume (V); substituting in the ideal gas equation we get,

ρ = mP / RT

Answer 2) ρ (hot air) = ρ (cold air) X $\frac{T_{h}}{T_{c}}$

Here according to the formula because T(hot air) >T(cold air),

So, the density of hot air greater than the density of cold air.

The relationship between the ρ (h) = ρ(c) X $\frac{T_{h}}{T_{c}}$

6 0

2 years ago

Read 2 more answers

Automobiles are often implicated as contributors to global warming because they are a source of the greenhouse gas CO2. How many

kondor19780726 [428]

Answer:

5,747.82 pounds of $CO_2$ would your car release in a year if it was driven 170 miles per week.

Explanation:

Mileage of the car = 27.5 miles/gal

Distance driven by car in week = 170 miles

Distance driven by car in a day= $\frac{170 miles}{7}=24.286 mile$

Volume of gasoline used in a day : V

$\frac{24.286 mile}{27.5 miles/gal}=0.8831 gal=0.8831\times 3785.41 cm^3=3,342.96 cm^3$

$1 gal = 3785.41 mL = 3785.41 cm^3$

Density of the gasoline = d= $0.692 g/cm^3$

Mass of the gasoline used in a day = m

$m=d\times V=0.692 g/cm^3\times 3,342.96 cm^3=2,313.33 g$

$2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O$

Moles of gasoline ( isooctane):

= $\frac{2,313.33 g}{114 g/mol}=20.292 mol$

According to reaction , 2 moles of isooctane gives 16 moles of carbon dioxide gas.Then 20.292 mole isooctane will give :

$\frac{16}{2}\times 20.292 mol=162.340 mol$ of carbon dioxide gas

Mass of 162.340 moles of carbon dioxide gas :

162.340 mol × 44 g/mol = 7,142.91 g

Mass of carbon dioxide gas produced in a day = 7,142.91 g

1 year = 365 days

Mass of carbon dioxide gas produced in a 365 days:

= 365 × 7,142.91 g = 2,607,163.494 g

1 pound = 453.592 g

$2,607,163.494 g=\frac{ 2,607,163.494}{453.592} pounds=5,747.82 pounds$

5,747.82 pounds of $CO_2$ would your car release in a year if it was driven 170 miles per week.

7 0

2 years ago