Which chemical equation correctly represents the reaction that takes place when nitrogen gas and hydrogen gas are formed as ammonia decomposes? (4 points) a N(g) + H3(g) → NH3(g) b 2N(g) + 3H2(g) → 2NH3(g) c 2NH3(g) → N2(g) + 2H3(g) d 2NH3(g) → N2(g) + 3H2(g)

Answer:

Buoyancy is the ability or tendency of an object to float in a fluid: a liquid or a gas. This happens because fluid pressure increases with depth. According to Archimedes' Principle, the buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.

Explanation:

Answer:

A warm front

Explanation:

Answer: A warm front

Explanation:

The concentration of the solution will be 0.073 M.

To solve this problem, we need to use the concept of stoichiometry and the equation for the reaction given.

The balanced net ionic equation for the reaction is not given in the question, so we cannot provide a numerical answer. Please provide the balanced net ionic equation for the reaction. Once we have that, we can proceed with the calculation.

Assuming the balanced net ionic equation for the reaction is;

A + B → C + D

where A represents the substance in the solution we are trying to determine the concentration of, and B represents the titrant (0.1371 M solution), we can use the following equation to calculate the concentration of A;

M_A = (M_B x V_B) / V_A

where M_A is the concentration of A, M_B is the concentration of the titrant, V_B is the volume of titrant used, and V_A is the volume of the solution.

Substituting the given values into the equation, we get;

M_A = (0.1371 M x 21.24 mL) / 40.00 mL

M_A = 0.073 M

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Answer:

O-18 is used as a tracer in many hydrologic studies. It is most often used as a component in a mixing-model and hydrograph separation, as O-18 acts conservatively and is applied naturally and uniformly over broad areas. O-18 can be used when different sources (old water/new water) have different isotopic values.

Crude oil is taken directly from the ground, without artificial chemical alteration. Option A is correct

Crude oil is the correct term for oil taken directly from the ground, without artificial chemical alteration. It is a naturally occurring, unrefined petroleum product composed of hydrocarbon deposits and other organic materials.

Crude oil is a nonrenewable resource and the primary source of energy for the world.

Crude oil is a naturally occurring, unrefined petroleum product composed of hydrocarbon deposits and other organic materials. It is typically found in underground reservoirs and extracted through drilling. Crude oil is the primary source of energy for many industrial processes and is refined into various products such as gasoline, diesel fuel, heating oil, and lubricants. It is a nonrenewable resource and its availability and price can fluctuate based on supply and demand.

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Answer:

1.099 gmL¯¹ ≈ 1.1 gmL¯¹

Explanation:

From the question given above, the following were obtained:

Mass of empty cylinder = 9.5 g

Mass Cylinder + NaOH = 31.92 g

Volume of solution = 20.4 mL

Concentration of solution =?

Next, we shall determine the mass of sodium hydroxide, NaOH. This can be obtained as as illustrated below:

Mass of empty cylinder = 9.5 g

Mass Cylinder + NaOH = 31.92 g

Mass of NaOH =?

Mass of NaOH = (Mass Cylinder + NaOH) – (Mass of empty cylinder)

Mass of NaOH = 31.92 – 9.5

Mass of NaOH = 22.42 g

Finally, we shall determine concentration of the solution as follow:

Mass of NaOH = 22.42 g

Volume of solution = 20.4 mL

Concentration of solution =?

Concentration = mass /volume

Concentration of solution = 22.42 / 20.4

Concentration of solution = 1.099 gmL¯¹ ≈ 1.1 gmL¯¹

Therefore, the concentration of the solution is 1.1 gmL¯¹

Fine hair typically has fewer layers of cuticle scales compared to other hair types.

The cuticle is the outermost layer of the hair shaft that serves as a protective barrier. It consists of multiple layers of scale-like structures called cuticle scales. The number of cuticle scale layers can vary depending on individual hair characteristics, including hair type and texture.

In the case of fine hair, which is characterized by a smaller diameter and a smoother texture, it generally has fewer layers of cuticle scales compared to thicker or coarser hair types. Fine hair tends to have a more delicate structure with thinner cuticle scales. This can make fine hair more prone to damage and breakage, as it offers less protection to the inner layers of the hair shaft.

While the exact number of cuticle scale layers in fine hair can vary from person to person, it is typically lower compared to other hair types. The reduced number of cuticle scales in fine hair contributes to its specific characteristics, such as its softness and smoothness.

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The energy are there in one photon of orange light whose wavelength is 630nm is  \(3.15401\times10^{-19}\) Joules.

W=c/v, c=speed of light, v=frequency

\(6.3 \times 10^-7=3 \times 10^8/v\)

\(v=3 \times 10^8 / 6.3 \times 10^-7\)

\(v=4.76 X 10^14 Hz\)-frequency of the yellow light.

E=hv, h=Planck's constant,

\(E=(4.76 \times 10^14)Hz \times 6.62607×10^-34 J s\)

\(E=3.15401\times10^{-19}\) Joules- the energy of a single photon of yellow light.

Planck's constant or Planck's constant, is a fundamental physical constant of quantum mechanics. The constant gives the ratio of the energy of the photon to its frequency, and for mass-energy equivalent, the ratio of mass to frequency.

In quantum mechanics, energy is exchanged and absorbed in certain amounts called quanta. The Planck constant is a number that defines the amount of energy in these quantities and expresses how small things can be. Learn more about Planck's constant in this infographic.

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Answer:

urm is that an answer lol

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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A chemical reaction can be the concisely represented by a chemical  equation. The substances that undergo the chemical change are the reactant . The new substances formed are the product .

The chemical reaction is represented by the chemical equation. The substance that will going to react or that undergo the chemical change are called as the reactant. The new substance that are formed by the chemical reaction are called as the product. The balance chemical equation is in which the toms in the reactant side is equals to the product side.

Thus, the substance undergo chemical change is the reactant and the new substance of formed  are the products.

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Answer:

proton=88

electron=88

neutron=138

Answer:

silicon and germanium.

Explanation :

The passage states that at extreme pressures an elemental solid assumes the structure and bonding characteristics of a heavier element in the same column of the periodic table. The structure and bonding of diamond, which is a form of carbon, would therefore be most like other elements in the same group of the periodic table as carbon. This group contains silicon and germanium.

Answer: Zn2+

Explanation:

The standard reduction potential of the given species is as follows:-

\(\begin{aligned}&Z_{(aq)}^{2+}+2 e^{-} \longrightarrow {Zn}(\mathrm{s}) \quad E^{\circ}=-0.76 \mathrm{~V}\\&\mathrm{Mn}_{(\text {aq) }}^{2+}+2 e^{-} \longrightarrow \mathrm{Mn}(\mathrm{s}) \quad E^{\circ} = -1.03 \mathrm{~V}\\&\mathrm{Na}^{+}_{(\text {aq) }} + e^{-} \longrightarrow \mathrm{Na}\text{(s)} \quad E^{\circ}=-2.71 \mathrm{~V}\end{aligned}\)

\(\begin{aligned}&\mathrm{Al}_{(\text {aq) }}^{3+}+3 e^{-} \longrightarrow \text {Al}\text{(s)}\quad E^{0}=-1.66 \mathrm{~V}\\&\mathrm{Li}^{+}(aq)+{e}^{-} \longrightarrow \mathrm{Li}\text{(s)} \quad E^{0}=-3.05 \mathrm{~V}\end{aligned}\)

In the electrochemical series, the species having the lowest electromotive force—the lowest negative value—will be reduced first and the species having the highest negative value will be reduced last

Therefore, Zn2+ will be reduced first and Li+ will be reduced last

The reduction has been defined as the loss of electrons. The species of molten salt that reduces first has been zinc ion in electrolysis.

The electrolysis has been defined as the process of the ionization of the salt under the influence of the electric field.

The species with the lowest reduction potential will reduce first. The reduction potential of the following is:

Zinc has the lowest reduction potential and thus is the reduced first among the others.

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Answer:

Explanation: This reaction is called a synthesis reaction. This is because a synthesis reaction is when two or more reactants combine/react together to form a single product. The two reactants carbon (C) and oxygen (O2) reacted together to form one single product: carbon dioxide (CO2)

The energy  for the  do 3.0 moles of photons, all with a wavelength of 665 nm,  is  548 kJ

Since we know that the wavelength is the distance between the corresponding trough or crest of a wave. Since the formula for calculating the  energy of a photon is :

E = hc/λ, where h is Planck's constant, λ is the wavelength of the wave. and c is the speed of light.Now substituting the values   in the above formula we get,

E = (6.63x10⁻³⁴ J·s) (3x10⁸ m/s) / (655 x10⁻⁹ m)

E = 3.03x10⁻¹⁹ J.

Now the energy of 3 moles of photons will :

=3.03x10⁻¹⁹ J x 6.023 x 10²³/mol x 3.0 mol / 1000

= 548 kJ

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\(\boxed{\begin{array}{c|c|c|c|c|c|c}\boxed{\bf{Element}} &\boxed{\bf{Percentage}} &{\boxed{\bf{Atomic\:mass}} &\boxed{\bf{Constant\:in\:Sample}} &\boxed{\bf No\:of\:moles} &\boxed{\bf{Sample\:Ratio}} &\boxed{\bf{Sample\:whole\:no\:ratio}}\\ &&&&&& \\ \sf C &\sf 50.84 &\sf 12 &\sf 50.84g &\sf{\dfrac{50.84}{12}=4.2} &\sf {\dfrac{4.2}{3.6}=1.16} &\sf 1 \\ &&&&&&\\ \sf H &\sf 8.53 &\sf 1 &\sf 8.53g &\sf{\dfrac{8.53}{1}=8.53} &\sf{$\dfrac{8.53}{3.6}$}=2.37} &\sf 2 \\&&&&&&\\ \sf O &\sf 57.69 &\sf 16 &\sf 57.69g &\sf{\dfrac{57.69}{16}=3.6} &\sf{\dfrac{3.6}{3.6}=1} &\sf 1\end{array}}\)

Now

Empirical formula is

\(\\ \sf\bull\longmapsto C_1H_2O_1\)

\(\\ \sf\bull\longmapsto CH_2O\)

Answer: B) ethanol

Explanation:

Due to its strong attraction with water molecules.

Answer:

D) Ba < Pb < P

Explanation:

Barium (Ba): 5,2117

Lead (Pb): 7,4167

Phosphorus (P): 10,4867

If excess \(H_2O\) is used as stated in the illustration the amount of \(Mg_3N_2\) that would be required would be 7.57 grams

From the equation of the reaction:

\(Mg_3N_2(s) + 6H_2O(l) --- > 3Mg(OH)_2(s) + 2NH_3(g)\)

Since the yield is 80% of the theoretical value, in order to make 10g, the theoretical yield would be 12.5 g.

Mole ratio of \(Mg_3N_2\) and \(Mg(OH)_2\) = 3:1

Mole of 12.5 g  \(Mg(OH)_2\) = 12.5/53.32 = 0.225moles

Equivalent mole of \(Mg_3N_2\)  = 0.124/3 = 0.075 moles

Mass of 0.0041 moles  \(Mg_3N_2\) = 0.075 x 100.95 = 7.57 grams

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A buffer of 300 ml of 100 mM Tris pH 7.8 and 250 mM NaCl can be prepared by dissolving 3.64 g of Tris and 4.27 g of NaCl in 300 ml of water, and adjusting the pH to 7.8 using 10 ml of 1 M HCl. The % v/v refers to the volume of the solute while % w/v refers to the weight of the solute.

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The correct question would be as

How do you prepare 300 ml buffer of 100 mM Tris pH 7.8 and 250 mM NaCl? % v/v,% w/v Questions.

Answer:

A

Explanation:

This is because in the graph shown line A has a quite greater impact of refraction than line B .

Hence, we can conclude that line A has the greater reaction at a faster rate.

We would need  5 moles of oxygen in the reaction.

In order to solve this kind of question we are going to depend on the stoichiometry of the reaction. Let us note that the stoichiometry is many times just the mass - mole relationship that is in the reaction.

We have the reaction equation as;

2NaNO2 + O2 ----> 2NaNO3

If in the reaction equation;

1 mole of oxygen does produce 2 moles of sodium nitrate

x moles of oxygen would produce 10 moles of sodium nitrate

x = 1 * 10/2

= 5 moles of oxygen

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Answer:

11.01

Explanation:

because yes :)

Answer:

Explanation:

may u explain what u mean then i will be able to help u because i like knows this but what u mean will be better so i can tell u the right answer thanks have a good day

ANSWER

The final pressure of the gas is 155mmHg

EXPLANATION

Given that:

The initial pressure of the gas is 40mmHg

The initial temperature of the gas is 77K

The final temperature of the gas is 298K

To find the final pressure, follow the steps below

In the given data, the volume of the container is fixed. Hence, the process is an Isochoric.

Step1: Write the gas law at constant volume

Step 2: Substitute the given data into the formula in step 1 to find P2

Hence, the final pressure of the gas is 155mmHg

The empirical formula of the neptunium oxide is Np₂O₄.

How to determine  empirical formula?
To determine the empirical formula of the neptunium oxide, we need to calculate the moles of neptunium and oxygen in the reaction and find the simplest whole-number ratio between them.

1. Calculate the moles of neptunium:

Mass of neptunium = 1.000 g

Molar mass of neptunium = atomic mass of Np = 237.0 g/mol

Moles of neptunium = mass / molar mass = 1.000 g / 237.0 g/mol = 0.00422 mol

2. Calculate the moles of oxygen:

Change in mass = final mass - initial mass = 1.160 g - 1.000 g = 0.160 g

Assuming all the change in mass comes from oxygen:

Moles of oxygen = change in mass / molar mass of oxygen = 0.160 g / (16.00 g/mol) = 0.0100 mol

3. Find the mole ratio between neptunium and oxygen:

Divide the number of moles by the smallest number of moles.

Mole ratio = Moles of neptunium : Moles of oxygen = 0.00422 mol : 0.0100 mol ≈ 1 : 2.37

4. Convert the mole ratio to the simplest whole-number ratio:

Multiply the mole ratio by a factor to obtain whole numbers. In this case, we can multiply by 2 to get the simplest ratio.

Empirical formula of neptunium oxide = Np₂O₄

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Answer:

Br

Explanation:

Organic compound which has -OH as functional group is classified as alcohols while those with -COOH as functional group are classified as carboxylic acids.

Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

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