how many moles of an NH3 can be produced from 2.82 moles of nitrogen in the following reaction:

Answer:

This reaction has infinite ways to be balanced

Explanation:

To balance this equation we can use the algebraic method:

N2O4(g) + CO → NO(g) + CO2(g)+NO2(g)

Where we write each molecule as a letter:

A + B → C + D + E

Then, we write the equations according the number of atoms of each molecule. That is:

Oxygen → 4A + B = C + 2D + 2E (1)

Nitrogen → 2A = C + E (2)

Carbon → B = D (3)

Then, we have to give 1 arbitral number for a letter. For example:

B = 1; D = 1

(1) 4A + 1 = C + 2 + 2E

4A = C + 2E + 1

2A = C + E (2) Twice (2):

4A = 2C + 2E

Subtracting (1) in (2)

C + 2E + 1 = 2C + 2E

C + 1 = 2C

1 = C

Si 1 = C:

4A + 1 = 1 + 2 + 2E

4A = 2 + 2E (1)

y:

2A = 1 + E (2)

Twice:

4A = 2 + 2E

As (1) and (2) are the same equation:

For example:

N2O4(g) + CO → NO(g) + CO2(g)+NO2(g)

Answer:

Age ≅ 7500 years

Explanation:

All radioactive decay is 1st order kinetics and described by the expression

A = A₀e^-kt => t = ln(A/A₀) / -k

k = 0.693 / t(half life) = (0.693 / 5730)yrs⁻¹ = 1.21 x 10⁻⁴ yrs⁻¹

t = Age = [ln(0.103/0.255) / - 1.21 x 10⁻⁴] yrs = 7500 years

Answer:

The answer is in the problem

Explanation:

As general rule of number of oxygen is -2:

O → -2

Alkali metals (Li, Na, K) are always +1

Na → +1

Alkali earth methals (Be, Mg, Ca...) are always +2

Ca → +2

The halogen group (F, Cl, Br...) is always -1

F → -1

The oxidation number of Si (+/- 4)

Aluminium is, usually +3

And to complete the octet rule in nitrogen, 3 electrons are required. That means:

N → -3

answerA) 100 mL

Explanation:

At constant temperature and number of moles, Using Boyle's law  

Given ,  

V₁ = 200 mL

V₂ = ?

P₁ = 60 kPa

P₂ = 120 kPa

The new volume of the gas is 100mL

Boyle's law is use to calculate the volume of a gas in relation with its pressure. The Boyle's law equation is as follows:

P1V1 = P2V2

Where;

P1 = initial pressure of the gas (torr)

P2 = final pressure of the gas (torr)

V1 = initial volume of the gas (mL)

V2 = final volume of the gas (mL)

According to the information of this question, the pressure on 200mL of a gas changed from 380 torr to 760 torr. Hence;

V1 = 200mL

V2 = ?

P1 = 380torr

P2 = 760torr

Using P1V1 = P2V2

V2 = P1V1/P2

V2 = (380 × 200) ÷ 760

V2 = 76000 ÷ 760

V2 = 100mL

Hence, the new volume of the gas is 100mL

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Answer:

A) –7.8944×10-13 J/atom

Explanation:

Mass defect of a radionuclide (m)

[tex]=-8.7839[/tex]×[tex]10^{-30} kg[/tex]

Formula for binding energy

[tex]E=mc^{2}[/tex]

   [tex]=(-8.7839x10^{-30} kg)(3x10^{8} m/s)^{2}[/tex]

[tex]E=-7.8944x10^{-13} J/atom[/tex]

If the mass defect for a radionuclide is – 8.7839 × 10⁻³° kg, the binding energy per atom will be –7.8944 × 10⁻¹³  J/atom. The correct option is A.

A radionuclide is an unstable nuclide because it contains so much charge. The excess energy is used by the gamma radiation by the nucleus, the electron uses energy to move to another orbital.

Radionuclides are particles that are used to scanning or monitor the radioactive chemicals that are in the body due to swallowing or inhaling.

The binding energy per atom can be calculated by the formula

The mass of defect of a radionuclide (m) is – 8.7839 × 10⁻³° kg

E = mc²

E =  – 8.7839 × 10⁻³° x 3 x 10⁸ m/s

E = –7.8944 × 10⁻¹³  J/atom.

Thus, the correct option is A. –7.8944×10-13 J/atom.

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Solar energy:-

In this way the energy generated through sun light with the help of solar panels and to be used in many works.

Wind energy:-

This is generated by moving turbines with windmills .It is used to create electric energy

Answer:

hi

Explanation:

I'm just figuring this out

Answer:

[tex]{\huge\blue{\fbox{{࿐ᑕᗩᖇᗷOᑎᗩTᗴ IOᑎ࿐}}}}[/tex]

✏The fizz in the club soda, the foaming effect in the washing soda are all due to carbonate ions. Carbonate is a salt of carbonic acid possessing the molecular formula CO32–. The main group of elements used as carbonates are alkali and alkaline earth metals.

✏ [tex]CO3 ^{2 - } [/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

Answer:

answer is B. Electricity cools down devices as it travels through them

Explanation

Solution :

When non volatile solute is added to solvent, vapor pressure gets lowered.

Relative lowering in vapor pressure is given :

[tex]$\frac{P^0-P}{P^0}$[/tex]   = [tex]$\text{mole fraction}$[/tex] of solute

[tex]$\frac{P^0-P}{P^0}=x_B$[/tex]

[tex]$P^0$[/tex] = vapor pressure of pure solvent

P = vapor pressure of solution

[tex]$x_B$[/tex] = mole fraction of solute

[tex]$x_B=\frac{n_B}{n_A+n_B}$[/tex]

[tex]$n_B $[/tex] = [tex]$\text{number of moles of solute}$[/tex]

[tex]$n_A$[/tex] = [tex]$\text{number of moles of solvent}$[/tex]

Number of moles [tex]$=\frac{\text{weight}}{\text{molecular weight}}$[/tex]

[tex]$\frac{P^0-P}{P^0}=\frac{w_B/M_B}{w_A/M_A+w_B/M_B}$[/tex]

            [tex]$\approx \frac{w_B/M_B}{w_A/M_A}$[/tex]

1. For 10 g of [tex]$CH_3COOK$[/tex]

         [tex]$CH_3COOK \rightarrow CH_3COO^- + K^+$[/tex]

  Ions = 2

It will affect colligative property.

[tex]$\frac{P^0-P}{P^0} = \frac{i \times 10/98}{w_A/M_A}$[/tex]

Relative lowering in vapor pressure will be :

[tex]$=\frac{2 \times 10/98}{w_A/M_A}$[/tex]

[tex]$=\frac{0.20}{w_A/M_A}$[/tex]

2. For 20 g sucrose

Sucrose is non electrolyte, i = 1

[tex]$\frac{P^0-P}{P^0} = \frac{ 20/342}{w_A/M_A}$[/tex]

            [tex]$=\frac{0.050}{w_A/M_A}$[/tex]

3. For 20 g of glucose.

   Glucose is a non electrolyte, i = 1

   [tex]$\frac{P^0-P}{P^0} = \frac{20/180}{w_A/M_A}$[/tex]

               [tex]$=\frac{0.11}{w_A/M_A}$[/tex]

[tex]$w_A/M_A$[/tex] is same in all three solutions.

Hence, lowering in vapor pressure is maximum in [tex]$CH_3COOK$[/tex] and minimum is Sucrose.

Vapor pressure from lowest to highest.

10 g of [tex]$CH_3COOK$[/tex] < 20 g of glucose < 20 g of sucrose

The pressure exerted by vapor to the other gas is called vapor pressure.

The formula used to solve the question is as follows:-

[tex]\frac{P^o -P}{P^o}[/tex]

The water vapor depends on the following:-

After solving the equation, the correct sequence is as follows:-

[tex]CH_3COOK > GLUCOSE > SUCROSE[/tex]

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Answer:

it will be the same on both sides of the membrane

When the pure water is separated from the aqueous sugar solution when the sugar cannot pass through the semipermeable membrane. So the water moves through the membrane to the sugar solution. Therefore, the concentration of sugar solution will be decreased.

Osmosis can be described as the spontaneous net movement or diffusion of solvent molecules through a permeable membrane from a region of lower solute concentration to a higher solute concentration in a direction that tends to balance the solute concentrations on both sides.

A physical process in which any solvent moves across a selectively permeable membrane separating two solutions of different concentrations.

Osmotic pressure can be described as the external pressure needed to be applied so that there is no net movement of a solvent across the membrane. Osmotic pressure can be defined as a colligative property because it depends on the molar concentration of the solute but not on its identity.

Therefore, option (A) is correct.

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Answer: prism

Explanation: A prism is a polyhedron, with two parallel faces called bases. The other faces are always parallelograms. The prism is named by the shape of its base.

Answer:

refer to below

Explanation:

- read your textbook! especially the topics that are most confusing

- as you read, make sure to take notes/make an outline. write the words from the text in your own words. In chem, the textbook explanations are usually very detailed, so putting it in your own words will help you remember and understand what you write.

- make sure you really understand the concepts. don't just memorize what you read.

- draw diagrams and structures. seeing how things are structured will help you visualize what you learn

- ask questions to your teacher. if there is anything confusing, make sure to refer to your teacher as they will hopefully be able to explain it so  it won't be confusing

These tips have helped me pass chem with an A. Hope all of this helped!

Answer:

Explanation:

Study material, ask for help, read textbook and do practice problems, get a tutor, beg your teacher for marks,

Answer: yes they come in different colors.

Explanation:

Most shades of soil is mostly black,brown,red,gray,and white the color of soil and other properties including texture, structure, and consistency are used to distinguish and identify soil.

Answer:

[tex]28.037\ \text{s}[/tex]

Explanation:

[tex][A]_0[/tex] = Initial concentration = 1.28 M

[tex][A][/tex] = Final concentration = [tex]0.17[A]_0[/tex]

k = Rate constant = 0.0632 s

t = Time taken

For first order reaction we have the relation

[tex]kt=\ln\dfrac{[A]_0}{[A]}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{[A]}}{k}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{0.17[A]_0}}{0.0632}\\\Rightarrow t=28.037\ \text{s}[/tex]

Time taken to reach the required concentration would be [tex]28.037\ \text{s}[/tex].

Answer:

Creo que es D pero no tan segura

Explanation:

The partial pressure of Xe in the mixture is 1.850 atm. (partial pressure of Xe = Total pressure - Partial pressure of He - Partial pressure of Ar = 1.850 atm).

To find the partial pressure of Xe, we need to subtract the partial pressures of He and Ar from the total pressure.

Total pressure = partial pressure of He + partial pressure of Ar + partial pressure of Xe

Given:

Total pressure = 2.40 atm

Partial pressure of He = 0.300 atm

Partial pressure of Ar = 0.250 atm

Let's solve for the partial pressure of Xe:

Partial pressure of Xe = Total pressure - Partial pressure of He - Partial pressure of Ar

Partial pressure of Xe = 2.40 atm - 0.300 atm - 0.250 atm

Partial pressure of Xe = 1.850 atm

Therefore, the partial pressure of Xe in the mixture is 1.850 atm.

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Answer:

yes

Explanation:

cuz is a square and if all angles are equal of a square then it is correct

Answer:

10 molecules of NH₃.

Explanation:

N₂ + 3H₂ --> 2NH₃

As the N₂ supply is unlimited, what we need to do to solve this problem is convert molecules of H₂ into molecules of NH₃. To do so we use the stoichiometric coefficients of the balanced reaction:

10 NH₃ molecules could be prepared from 15 molecules of H₂ and unlimited N₂.  

Answer:

0.2878 liters

Explanation:

It is possible to make 0.2878 liters of 4 M solution of lithium bromide using 100 grams of the compound.

Answer:

0.5875L

Explanation:

concentration = mole/ volume

n(LiCl) = 20 / (7 + 35.5) = 0.47 mol

volume = mole / conc.

volume = 0.47 /0.8

= 0.5875 dm³ = 0.5875L

Answer: I'm not sure what your question is but i'll answer as best as I can.

Explanation:

Since X is equal to 7 H and we know that H is equal to 1.008, we can just do 7x1.008 = 7.056 g. I hope i helped and please clarify more in the future.

The atomic mass of an element is given by the sum of the mass of protons and neutrons. The element X is lithium as it has a mass of 6.941 u.

Atomic mass is the sum of the masses of the isotopes of that element and is given by adding the masses of the number of protons and neutrons of the elemental atom.

The atomic mass of one hydrogen atom is 1.008, so seven hydrogens will be, 7 x 1.008 = 7.056 g. Now, from the periodic table, it can be seen that an atomic mass of 7.056 g is closest to the atomic mass of a lithium atom (6.941 u).

From the mass, it can be said that seven hydrogen atom has an equivalent mass as that of one lithium atom in the periodic table. The lithium atom has atomic number 3 and an atomic mass of 6.941 g/mol.

Therefore, element X is lithium.

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Answer:

A. it allows results to be reviewed and reproduced by other scientists.

Answer:

26.9L of SO2

Explanation:

The reaction between Sulphur and oxygen is as follows:

[tex]S_2 + 2O_2 \to 2SO_2[/tex]

This implies that:

2 moles of oxygen reacts with 1 mole of sulphur to produce 2 moles of SO₂

2 moles of oxygen also yields 2 moles of SO₂

The number of moles of oxygen given is determined as:

[tex]= 26.9 \ L \ of \ O _2 \times (\dfrac{1 \ mol \ of O_2 }{22.4 \ L}) \\\\ = 1.20 \ mol \ of \ O_2[/tex]

The number of moles of SO₂ by using the ratio is:

[tex]= 1.20 \ mol \ of \ O_2 \times (\dfrac{1 \ mol \ of \ SO_2 }{1 \ mol \ O_2}) \\ \\ = 1.20 \ mol \ of SO_2[/tex]

Finally, the volume by applying the new moles is computed as:

[tex]= 1.20 \ moles \ of \ O_2 \times ( \dfrac{1 \ mo \ of \ SO_2}{1 \ mol \ of O_2}) \times ( \dfrac{22.4 }{1 \ mol }) \\ \\ = 26.9 \ L \ of \ SO_2[/tex]

Explanation:

because there is 2 hydrogen atoms in the reactions side of the equation (you can tell because the H has a 2 in the subscript) you have to have 2 hydrogen atoms in the reactants side to help balance out the equation. and since the copper and oxygen atoms are already balanced there is no coefficient needed.

Answer:

λ Represents:-

-TheUnknownScientist

Answer:

D

Explanation:

D is the answer because 2 is needed to know

Answer:

B) 3 and 7

Explanation:

i just took the test

Answer:

because dark colours like black attract light (sun) and heat. light colors reflect more light, (it absorbs less energy and heat from the sun)

Answer:

Because Black color absorbs light better than light-colored.

for example have you ever seen the black car on the road if you touch it very hotter than white car

1. White is the most reflective color. Does not absorb heat like black Make the house not hot.

2. White has the least radiation exposure. Therefore, during the winter night, it will help retain heat for a while. 3. Because white absorbs light as little as possible. Causing the pigment to deteriorate slowly Unlike black that absorbs light well. Causing the color to deteriorate and fade quickly until noticeable

4. If the house next to you is painted white during the day, it will help reflect light into the house.

Why that black color absorbs heat? Even though it abosrbs the light? It comes from the principle that (Substance or material) Black is what absorbs (absorbs) light in every technology.

It absorbs all widths of light, including infrared light. (The infrared itself is hot.)

Black repels self-heating the most because of all colors of light. But there is justice.