49. Identify the noble gas that has atoms in the ground state with the same electron configuration as the nitrogen in a molecule of isocyanic acid

Answer:

Kc → 5.58×10⁻⁴

Explanation:

Equilibrium reaction is:

2NOCl (g) ⇄  2NO (g) + Cl₂(g)

Initially we have 1.25 moles of NOCl

After the equilibrium, we have 1.10 moles. So, during the process:

(1.25 mol - 1.1 mol) = 0.15 moles have reacted.

As ratio are 2:2, and 2:1, 0.15 moles of NO and (0.15 /2) = 0.075 moles of chlorine, were produced in the equilibrium.

Finally in equilibrium we have: 1.10 moles of NOCl, 0.15 moles of NO and 0.075 moles of Cl₂. But these amount are not molar, so we need molar concentration in order to determine Kc:

1.10 mol /2.50L = 0.44 M

0.15 mol / /2.50L = 0.06 M

0.075 mol /2.50L = 0.03 M

Let's make expression for Kc → [Cl₂] . [NO]² / [NOCl]²

Kc = (0.03 . 0.06²) / 0.44² → 5.58×10⁻⁴

The general chemical equation for the complete combustion (or burning) of some hydrocarbon fuel is, in words, as follows:

hydrocarbon fuel and oxygen gas react to produce carbon dioxide gas and water vapor,

or, using chemical notation,

[tex]\mathrm{C_xH_y} + z\mathrm{O_2} \rightarrow \mathit{x}\mathrm{CO_2} + \frac{\mathit{y}}{2}\mathrm{H_2O}[/tex]

where

[tex]z = x + \frac{y}{4}.[/tex]

Don't worry if that looks daunting. In our case, we are given the identity of the fuel (methane, or CH₄), so our equations will be straightforward.

In words: Methane gas and oxygen gas react to produce carbon dioxide gas and water vapor (or methane gas + oxygen gas → carbon dioxide gas and water vapor).

In chemical notation:

[tex]\mathrm{CH_4}_{\text{(g)}} + 2\mathrm{O_2}_{\text{(g)}} \rightarrow \mathrm{CO_2}_{\text{(g)}} + 2\mathrm{H_2O}_{\text{(g)}}.[/tex]

Answer:

Electric charges produce electric fields

Explanation:

Answer:

108 g

Explanation:

2H₂ + O₂ ⇒ 2H₂O

1) n(H₂) : n(H₂O) = 2 : 2

Hence, n(H₂O) = n(H₂) = 6,00 mol

2) m(H₂O) = n × M = 6,00 mol × (2 + 16) g/mol = 6,00 × 18 mol = 108 g

Answer:

B

Explanation:

Answer:

B

Explanation:

the nervous system (nerves) is the brains communication to the body

Answer: Planet A: 76% Nitrogen, 23% Oxygen, 1% Other

Explanation: Hope this helps!

An astronomer studying planets outside our solar system has analyzed the atmospheres of four planets. The planets’ atmospheres would be most able to support a colony of humans is Planet A: 76% Nitrogen, 23% Oxygen, 1% Other. Therefore, option C is correct.

The term solar system is refer to the sun and planets, comets, asteroids and meteors which revolve around the sun to produce the solar system. The sun is the nearest star which is the main source of light for all the planets.

An astronomer studying planets outside our solar system has studied the atmospheres of four planets. The planets’ atmospheres would be most able to support a colony of humans is Planet A: 76% Nitrogen, 23% Oxygen, 1% Other.

Thus, option C is correct.

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Answer:

The least similar to a real gas found in the environment would be B.

Explanation:

Standard Ambient Temperature/Pressure (SATP) is at 298.15K and 101.3kPa. It describes standard conditions and is often used for measuring gas density and volume using the Ideal Gas Law. The values least similar to theses ones would be the least similar in the gases in the environment.

Answer:

arteries carry blood from the heart to the lungs and veins carry blood from the lungs to the heart

Explanation:

Arteries carry oxygenated blood from the heart, while veins carry oxygen-depleted blood back to the heart. ... The pulmonary veins transport oxygenated blood back to the heart from the lungs, while the pulmonary arteries move deoxygenated blood from the heart to the lungs.)

Answer:

Giant structures are usually arranged in to giant regular lattices and they are extremely strong because they have many bonds involved. Simple molecules are just normal molecules as the name suggests like CO². though it contains strong covalent bond it still has weak intermolecular forces

Explanation: when your account gets to deleted and your trying to get your points up lol

Answer:

1.023 J / g°C

Explanation:

Mass, m = 37.9 g

Temperature increase (change) = 25.0°C

Heat = 969 J

Specific heat capacity ,  c= ?

The relationship between these quantities is given by the equation;

H = mcΔT

c = H / mΔT

c = 969 / (37.9 * 25)

c = 969 / 947.5 = 1.023 J / g°C

Answer:

ammonia being lighter than air, is collected by downward displacement of air in an inverted gasjar

The gas jar is used to collect ammonia gas. This gas can be barely dissolved in water. As a result, the downward displacement of water does not gather it in the jar.

With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical. Ammonia, the simplest pnictogen hydride and a stable binary hydride, is a colorless gas with a strong, pungent odor.

Because it is simpler to install inlets and outlets in one end of an erect gas jar than it is to install them on the side or the bottom, which are required for placement on a stable surface.

Ammonia is prepared in a laboratory by forcing air downward to collect the gas. Due to the high solubility of ammonia in water, it is impossible to collect ammonia gas over water.

Thus, The gas jar is used to collect ammonia gas.

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Answer:

he was born on planet krypton

The final temperature : t=77.74 °C

Given

500 g coffee, t = 80 °C

110 g aluminum cup, t = 30 °C

Required

The final temperature

Solution

Q in = Q out

Q absorbed = Q released

Q aluminum cup = Q coffee

110 x 0.9 x (t-30)=500 x 4.18 x (80-t)

99t-2970=167200-2090t

2189t=170170

t=77.74 °C

Answer:

  1.7700×10^-22 g

Explanation:

A face-centered-cubic cell contains 4 atoms, so the volume per atom is ...

  (389.80×10^-12 m)³/(4 atoms) ≈ 1.4725×10^-29 m³

Then the mass of 1 atom is ...

  (12020 kg/m³)(1.4725×10^-29 m³) ≈ 1.76995×10^-25 kg

  ≈ 1.7700×10^-22 g

_____

Additional comment

That is the approximate mass of a Palladium atom.

Answer:

1.7700×10^-22 g

Explanation:

Answer:

2679.5 seconds  or 2679.5 / 60 = 44.66 minutes to produce 2 dm3 of chlorine gas.

Explanation:

To solve this we must be knowing each and every concept related to current. Therefore, it will take 44.66 minutes to produce  2 dm³ of chlorine gas by passing 6A current through concentrated sodium chloride solution.

When an electrical current continually runs in a single direction, it is said to be in direct current. Rectifiers, batteries, generators using commutators, and fuel cells all generate direct current. A flashlight or an appliance powered by batteries, for instance, both use direct current.

Among the most crucial subjects addressed in physics is AC, DC current. A form of electrical current known as an alternating current, sometimes known as an AC current, is one in which the direction of electron flow changes periodically.

2679.5 / 60 = 44.66 minutes to produce 2 dm3 of chlorine gas by passing a 6A current through concentrated sodium chloride solution.

Therefore, it will take 44.66 minutes to produce  2 dm³ of chlorine gas by passing 6A current through concentrated sodium chloride solution.

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Answer:

I am not sure

Explanation:

ΔABC ~ ΔEFD

Answer:

EF = CH₂

Explanation:

The empirical formula of any compound would be the most simplified and simple chemical formula of a compound. To get this number, we need to get the data of how many moles of each atom of the compoud we have.

Analyzing the data, we just know that an unknown compound undergoes a combustion reaction and produces CO₂ and H₂O. As the compound only have Carbon and hydrogen, it's pretty easy to get the moles of each atom.

To get the moles of CO₂, we need the molar mass of CO₂, which is 44 g/mol, then the moles:

nCO₂ = 2.28 / 44 = 0.0518 moles of CO₂.

Now that we have the moles of CO₂, we can get the moles of Carbon. Since 1 mole of CO₂ is made of 1 mole of Carbon and 2 moles of oxygen, this means that we have 0.0518 moles of C.

Applying the same thing with the water, we have:

nH₂O = 0.702 / 18 = 0.039 moles of water

And 1 mole of water is made of 1 mole of oxygen and two moles of hydrogens, then the moles of Hydrogen are 0.078 moles.

With these moles, we can now calculate the empirical formula.

C = 0.0518 / 0.0518 = 1

H = 0.078 / 0.0518 = 1.51 ≅ 2

Now these two numbers, give us the number of atoms, in the empirical formula so:

Of course there is no compound that have only those number of atom, but remember that this is the empirical formula, so, it's a simplified or reduced formula of the molecular formula, which means that the real or whole molecular formula could have more atoms of C and H, but to know this, we need the molar weight of this compound, and the problem does not give this data.

Hope this helps

Explanation:

matter is a substance that has mass and it takes up space.

hope this helps!!

Answer:

3,1,1 would work

Explanation:

Explanation:

I think

Bonding pairs = 4

Lone pairs around the left chlorine atom = 9

Answer:

1.evaperation

2.condenstation

3.precipatation

Explanation:

So I guess condenstation leads to precipatation-

Answer:

Evaporation is when water/liquids changes state from a liquid to a gas. Which eventually with enough water water vapor (which is what forms when water evaporates), it turns into clouds. But when the clouds get too heavy and full of water. Rain/precipitation falls from those clouds.

-Hope this helps!

Explanation:

Actually, no. While their mass may be the same (1kg), the volume of lead is a lot smaller than that of feathers. As there is the same mass stuffed in a smaller space, it must be denser. The density of water is 1 g/cm3, so if the density of the lead is more than 1g/cm3, it has to sink

Answer:

maybe they will be the same temperature

Explanation:

Answer: The effect of this transfer of energy usually, but not always, is an increase in the temperature of the colder body and a decrease in the temperature of the hotter body.

Explanation:

Answer:

a is balanced

Explanation:

a) reactant/ product

(2x2)=4c / 4c

(2x6)=12h / 12 h

14o / (8o+6o)=14 o

Answer: B. C and A.

Explanation: