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3 years ago

What is the formula of a compound formed between nitrogen (N) and potassium (K)?

Chemistry

2 answers:

nalin [4]3 years ago

8 0

<h3>Answer </h3>

Potassium nitride= K3N

<h3>Explanation </h3>

Potassium nitride is the correct name of the compound with chemical formula, K3N. The compound is formed between potassium ion (K+) and nitride ion (N-3).

Potassium has nineteen electrons and since it obeys octet rule with electronic configuration of 1s2 2s2 2p6 3s2 3p6 4s1. Potassium loses an electron in its outer subshell(4s) to attain a stable electronic configuration (1s2 2s2 2p6 3s2 3p6). Thus, forming K+.

On the other hand, N has seven electrons with electronic configuration of 1s2 2s2 2p3. Nitrogen also obeys octet rule. Hence, it acquires three electrons to attain a stable octet noble gas configuration (1s2 2s2 2p6), resulting in N-3.

Every nitrogen atom acquires three electrons from potassium. Also, potassium loses one electron to each nitrogen atom. In this interaction every nitrogen atom becomes N-3 and each potassium becomes K+.

Rina8888 [55]3 years ago

5 0

<span>You need to consider the valences of the two elements. Potassium is +1; nitrogen is -3. To balance the molecule, you need 3 potassium to one nitrogen, or K3N</span>

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A solution is made by dissolving 9.74 g of sodium sulfate in water to a final volume of 165 mL of solution. What is the weight/w

MatroZZZ [7]

Answer: The weight/weight % or percent by mass of the solute is 5.41 %.

Explanation:

Mass of the sodium sulfate,w = 9.74 g

Volume of the water = 165 mL

Density of the water = 1 g/mL

$Density=1 g/mL=\frac{\text{Mass of water}}{\text{Volume of water}}$

Mass of the water = $1 g/mL\times 165 mL=165 g$

Mass of the solution, W:

Mass of solute + Mass of solvent =9.47 g + 165 g=174.47 g

$w/w\%=\frac{w\times 100}{W}=\frac{9.45 g\times 100}{174.47 g}=5.41 \%$

The weight/weight % or percent by mass of the solute is 5.41 %.

8 0

2 years ago

The atmosphere surrounding Earth helps to maintain the various climates found around the world and keeps Earth from becoming ext

riadik2000 [5.3K]

Answer:

The atmosphere traps heat energy from the Sun and energy radiated from Earth's surface helping to maintain Earth's climate

Explanation:

Earth's atmosphere keeps much of the Sun's energy from escaping into space. This process, called the greenhouse effect, keeps the planet warm enough for life to exist. The atmosphere allows about half of the Sun's heat energy (50%) to reach Earth's surface.

4 0

2 years ago

The balanced equation for combustion in an acetylene torch is shown below:

vichka [17]

Answer:

70mol

Explanation:

The equation of the reaction is given as:

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

Given parameters:

Number of moles of acetylene = 35.0mol

Number of moles of oxygen in the tank = 84.0mol

Unknown:

Number of moles of CO₂ produced = 35.0mol

Solution:

From the information given about the reaction, we know that the reactant that limits this combustion process is acetylene. Oxygen is given in excess and we don't know the number of moles of this gas that was used up. We know for sure that all the moles of acetylene provided was used to furnish the burning procedure.

To determine the number of moles of CO₂ produced, we use the stoichiometric relationship between the known acetylene and the CO₂ produced from the balanced chemical equation:

From the equation:

2 moles of acetylene produced 4 moles of CO₂

∴ 35.0 mol of acetylene would produced:

$\frac{35 x 4}{2}$ = 70mol

6 0

2 years ago

Read 2 more answers

Now consider the reaction a+2b⇌c for which in the initial mixture qc=[c][a][b]2=387 is the reaction at equilibrium? if not, in w

Paul [167]

Solving this chemistry is a little bit hard because the question didn't give some important detailed.
So first, there are a couple problems with your question.
We will just need to know which direction will it proceed to reach equilibrium.
Your expression for Kc (and Qc ) for the reaction should be:
Kc = [C] / [A] [B]^2
You have not provided a value for Kc, so a value of Qc tells you absolutely nothing. Qc is only valuable in relation to a numerical value for Kc. If Qc = Kc, then the reaction is at equilibrium. If Q < K, the reaction will form more products to reach equilibrium, and if Q > Kc, the reaction will form more reactants.

5 0

3 years ago

Help me please i need the answer now<br>(nonsense report)

rusak2 [61]

Answer:

Quantitative

Words, Measurement, Numbers, Charts, Instruments, Quantity, Data

Qualitative

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Explanation :

Quantitative Data

Can't measure
Has numerical value
Can campare
Do not depend on human eye

Qualitative Data

Can't measure
Don't have numerical value
Can't campare
Depend on human eye

3 0

3 years ago