dinitrogen tetroxide and hydrazine (n2h4) undergo a redox reaction in which nitrogen and water are formed as products. what mass of nitrogen could be produced when 50.0 g of dinitrogen tetroxide and 45.0 g of hydrazine are combined? report your answer to the appropriate number of significant figures.

H+ (aq) undergone reduction in the reaction to form H2(g).

Cell reaction - ca(s) | ca 2 (aq) || h (aq) | h2(g) | pt

In above reaction we can say that ,

Ca(s) lost two e-(s) and became ca+2(aq), that means it is undergoing oxidation by losing to electrons.

In the above redox reaction, H+(aq) gains two electrons and undergone in the reaction to form H2(g), Thus here reduction takes place or we can say that H+ has undergone reduction.

Reduction occurs in the chemical reaction when addition of hydrogen or removal of oxygen takes place. Gaining of electron in the chemical reaction also referred as reduction.

Oxidation refers to the process when element looses it's electron or adding of oxygen or removal of hydrogen takes place.

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Answer:

D. Are there any running shoes that help people run faster?

Explanation:

because it's the question that more seems scientific.

i hope this helps

The correct answer is the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

The given solution is a hypotonic solution as the solution's tonicity is lower than that of the tears. The tears contain 0.9% w/v of NaCl, which is isotonic with tears. So, to make the given solution isotonic, the amount of sodium chloride needs to be added.

The concentration of NaCl in tears is 0.9% w/v. Additional Information: We know that % w/v is the amount of solute present in grams per 100 ml of the solution. Therefore, 0.9% w/v means 0.9 grams of NaCl is present in 100 mL of tears.

To make 30 ml of isotonic solution, we can use the following formula: Equivalent weight of NaCl = 58.5/2 = 29.25 (as NaCl ionizes to give Na+ and Cl- ions)Moles of NaCl required to make 30 ml isotonic solution = 0.9 × 30 / 1000 = 0.027Moles of Na+ and Cl- ions present in 30 mL of isotonic solution = 2 × 0.027 = 0.054

A number of grams of NaCl needed to prepare 30 mL of isotonic solution is calculated as follows:0.054 g = (0.027 x 29.25 x X) / 1000Where X is the amount of NaCl required to make 30 mL isotonic solution. Solving this equation gives us: X = 1.85 g (approx). Therefore, the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

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Answer:

The balanced equation would be:

3AgNO3+Al→3Ag+Al(NO3)3

Explanation:

The final pressure of the fluorinated organic gas in the cylinder is 363.7 kPa.

To solve this problem, we can use the ideal gas law, which states that

PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

Since the gas in the cylinder is fluorinated organic gas, we can assume that it behaves as an ideal gas.

First, we need to convert the volume and pressure to SI units, so we have

V1 = 0.94 L, P1 = 156 kPa, and V2 = 0.402 L.

We can also assume that the temperature remains constant, so T1 = T2.

Using the ideal gas law, we can write:

P1V1 = nRT1 and P2V2 = nRT2

Since T1 = T2, we can write:

P1V1/P2V2 = nR/nR = 1

Solving for P2, we get:

P2 = P1V1/V2 = 156 kPa x 0.94 L / 0.402 L = 363.7 kPa

In summary, we can use the ideal gas law to calculate the final pressure of a compressed fluorinated organic gas in a cylinder when the initial volume and pressure are given. It is important to convert the units to SI units and assume that the temperature remains constant.

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Answer:

A nonrenewable resource is a substance that is being used up more quickly than it can replace itself. Its supply is finite. Most fossil fuels, minerals, and metal ores are nonrenewable resources. Renewable resources such as solar and wind power and water are unlimited in supply.

Explanation:

Hope it is helpful....

Solid CO₂ sinks in liquid CO₂ and the triple point of CO₂ is at - 56.4 °C and 5.11 atm pressure. The sate of CO₂ exist at - 56.4 °C and 6 atm pressure is solid.

The triple point of the substance is the temperature and the pressure where all the three phase ( solid , liquid , gas ) of that substance co - exists.

given data is as follows :

temperature = - 56.4 °C  is the triple point temperature

Pressure = 5.11 atm is the triple point pressure

phase diagram of CO₂ , carbon dioxide is a positive slope for the curve. when the temperature is constant and we move to higher pressure , the CO₂ would be solid.

Thus, Solid CO₂ sinks in liquid CO₂ and the triple point of CO₂ is at - 56.4 °C and 5.11 atm pressure. The sate of CO₂ exist at - 56.4 °C and 6 atm pressure is solid.

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414 kJ energy is required to melt 2 kg of copper. Hence, option B is correct.

Energy is the capacity for doing work.

Given parameters:

Mass of copper  = 2kg

Unknown:

Amount of energy required to melt the copper  =?

Solution:

To solve this problem, we use:

Q  = m L

m is the mass

L is the latent heat of fusion of copper  = 207kJ/kg

So;

Q = 2 x 207  = 414kJ

Hence, option B is correct.

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The presence of water molecules in the aqueous solution shifts the reduction reaction from lead ions to water molecules, resulting in the production of hydrogen gas instead of lead metal.

The difference in the products formed during the electrolysis of molten lead bromide and aqueous lead bromide can be explained by the different conditions and species present in each case.

When molten lead bromide is used, the compound is in a liquid state without water molecules present. During electrolysis, the positive lead ions (Pb²⁺) are attracted to the negative electrode (cathode) where reduction takes place.

At the cathode, the lead ions gain electrons and are reduced to lead metal (Pb). This is because the reduction potential of lead ions is higher than that of water molecules, making the reduction of lead ions more favorable in this case.

At the same time, bromide ions (Br⁻) are attracted to the positive electrode (anode), where oxidation occurs, and bromine gas (Br₂) is produced.

On the other hand, when aqueous lead bromide is used, water molecules are present along with the lead bromide compound. During electrolysis, the water molecules can be reduced at the cathode instead of lead ions.

Reduction of water molecules produces hydrogen gas (H₂) because the reduction potential of water is lower than that of lead ions. The hydrogen gas is released at the cathode, while the lead ions (Pb²⁺) remain in the solution. At the anode, the bromide ions (Br⁻) are oxidized to form bromine gas (Br₂) as before.

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The predicted rate laws are:

A. rate = k[NO]

B. rate = k[Br2]

C. rate = k[NO]^n (n is a non-integer)

D. rate = k/[NO]

To predict the rate law for the reaction NO(g) + Br2(g) → NOBr2(g) under the given conditions, we can analyze the effects of changing the concentrations of reactants on the rate.

A. The rate doubles when [NO] is doubled and [Br2] remains constant:

This suggests that the reaction rate is directly proportional to the concentration of NO, and the rate law can be written as rate = k[NO].

B. The rate doubles when [Br2] is doubled and [NO] remains constant:

This indicates that the reaction rate is directly proportional to the concentration of Br2, and the rate law can be written as rate = k[Br2].

C. The rate increases by 1.56 times when [NO] is increased 1.25 times and [Br2] remains constant:

In this case, the rate is affected by the concentration of NO, but not directly proportional to it. The rate law can be written as rate = k[NO]^n, where n is a non-integer value.

D. The rate is halved when [NO] is doubled and [Br2] remains constant:

This suggests that the rate is inversely proportional to the concentration of NO, and the rate law can be written as rate = k/[NO].

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Answer:

H2SO4 + Ba(OH)2 = BaSO4 + 2H2o

Explanation:

Answer:

Final temperature = 149 K

Explanation:

Given data:

Initial temperature = 25°C (25+273 = 298 K)

Initial volume = 4.5 L

Final temperature = ?

Final volume = 9.0 L

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = T₁V₂/V₁  

T₂ = 4.5 L × 298 K / 9.0 L

T₂ = 1341 L K / 9.0L

T₂ = 149 K

To determine if MgCO3 will precipitate from the solution, we need to compare the ion product (Q) with the solubility product (Ksp) of MgCO3. The ion product (Q) is calculated by multiplying the concentrations of the ions involved in the dissociation of MgCO3.

The balanced equation for the dissociation of MgCO3 is:

MgCO3(s) ⇌ Mg2+(aq) + CO32-(aq) Given that the concentration of Mg2+ is 1.5×10^−3 M, we can calculate the concentration of CO32- using stoichiometry. Since 1 mole of MgCO3 dissociates to give 1 mole of Mg2+ and 1 mole of CO32-, the concentration of CO32- is also 1.5×10^−3 M.

The ion product (Q) is then calculated as:

Q = [Mg2+][CO32-] = (1.5×10^−3 M)(1.5×10^−3 M) = 2.25×10^−6

Comparing Q with the solubility product (Ksp) of MgCO3 (6.82×10^−6), we find that Q < Ksp. This means that the ion product is smaller than the solubility product, indicating that no MgCO3 will precipitate from the solution. Therefore, based on the given concentrations and the solubility product of MgCO3, no MgCO3 will precipitate from the solution when 50.0 mg of Na2CO3 is added to 150.0 ml of the solution.

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Without absolute value , for y=|x + 5| for  x <-5, y = -2x

If x < -5, then x + 5 < 0. Therefore, y = |x + 5| = -(x + 5).

y = -(x + 5)

Note that this equation is only valid when x < -5. For values of x greater than or equal to -5, the absolute value of (x + 5) becomes positive, and y = |x + 5| = x + 5. Therefore, the equation for the full domain of y = |x + 5| is:

y = -(x + 5) for x < -5

Therefore | x -5 | should be changed to 5 - x to get a positive value.

without absolute value , for x <-5, y = -2x

The term "absolute value" is not commonly used. However, there is a related concept called "absolute configuration." Absolute configuration refers to the spatial arrangement of atoms or groups of atoms around a chiral center in a molecule. A chiral center is a carbon atom that has four different groups attached to it.

The absolute configuration of a chiral center can be determined using the Cahn-Ingold-Prelog (CIP) rules, which assign priority to the four different groups based on their atomic numbers. By following these rules, we can determine whether the chiral center has an R or S configuration. Knowing the absolute configuration of a chiral center is important because it determines the molecule's biological activity and the way it interacts with other molecules in a chemical reaction.

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The 1H NMR signals of the indicated protons would be split into three peaks.

What are Protons?

Protons are subatomic particles that are present in the nucleus of an atom. They have a positive electric charge and are one of the three main components of an atom, along with electrons and neutrons. Protons are the heaviest of the three particles and make up a large portion of an atom's mass. The number of protons in an atom is known as its atomic number and is what determines an element's chemical behavior and properties.

The split happens because each proton is coupled to two other protons, and each proton is affected by the other two, resulting in a triplet.

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Answer:

Neptune is bigger than the moon

Explanation:

The circumference of the moon is 6,783.5 miles

The circumference of Neptune is 96,129 miles

This means neptunes circumference is about 14 times the size of the moons

The pH of this solution is 13.529.

Given:

Number of moles Ba(OH)₂ = 0.0550 moles

Volume = 325 mL

The calculation for moles:

\(Ba (OH)_{2}\) → \(Ba^{2}\)⁺ + \(2OH\)

In 1 moles Ba(OH)₂  we have 2 moles OH-

In 0.0550 moles Ba(OH)₂  we have 2*0.0550 = 0.11 moles OH-

The calculation for concentration:

[OH-] = moles / volume

[OH-] = 0.11 moles / 0.325 L

[OH-] = 0.338 M

Calculation of pOH:

pOH = -log[OH-]

pOH = -log(0.338)

pOH = 0.471

Calculation of pH:

pH + pOH = 14

pH = 14 - pOH

pH = 14 - 0.471

pH = 13.529

Thus, the pH of this solution is 13.529.

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Answer:

Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching, or twisting the object.

there is a change from vapour to liquid

The experiment in question involves burning a sample of an organic compound to determine its identity. Acetone, as you stated, is the compound under investigation in this instance. Acetone is a ketone compound. Alcohols and alkanes are two other types of organic compounds that were tested in this experiment.

When an organic compound is burned, the combustion products are analyzed to determine the identity of the original compound. The products of the combustion reaction can be examined to draw conclusions about the type of organic compound being investigated. The experiment revealed that acetone, a ketone compound, is an organic compound. Ketones are organic compounds with a carbonyl group bonded to two alkyl groups. When burned, ketones produce a mixture of carbon dioxide and water as products.

The combustion of alcohols, on the other hand, results in the same products, as alcohols also contain a carbonyl group. The presence of hydrogen in alcohols, however, creates a difference in the combustion process, resulting in the release of more energy during the reaction. Alkanes are hydrocarbons that have only carbon-carbon and carbon-hydrogen single bonds. When burned, alkanes produce only carbon dioxide and water as products. In comparison to alcohols and ketones, the heat released during the combustion of alkanes is less.

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Answer:

distance=speed X time

Moles are the proportion of the mass of the substance and that of the molar mass of the substance. The number of moles of iron (II) hydroxide will be 1.81 mol.

A mole is the measuring unit of the chemistry that measures even the small number of atoms, molecules and ions of the given compound. It can be given as the division of the mass from the molar mass.

The balanced chemical reaction can be shown as:

\(\rm FeCl_{2} + 2KOH \rightarrow Fe(OH)_{2} + 2KCl\)

In the question, the number of the moles of iron (II) chloride is 4.15 mol and of potassium hydroxide is 3.62 mol.

From the reaction, it can be said that the ratio of the moles of potassium hydroxide and iron (II) hydroxide is 2:1.

The number of moles of iron (II) hydroxide is calculated as:

\(\begin{aligned}\rm n(Fe(OH)_{2}) &=\rm \dfrac{n(KOH)}{ 2}\\\\&= \dfrac{3.62}{2}\\\\&= 1.81 \;\rm mol\end{aligned}\)

Therefore, option A. 1.81 mol is the moles of iron (II) hydroxide that will be produced.

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The empirical formula of the compound is K2O.

We need to determine the ratio of atoms in the compound. Here, we are given the masses of potassium and oxygen that are produced by decomposing the compound.

From the given information, we know that

Mass of K = 19.55 g

Mass of O = 4.00 g

We can use these masses to determine the number of moles of each element:

Moles of K = 19.55 g / 39.10 g/mol (molar mass of K) = 0.500 mol

Moles of O = 4.00 g / 16.00 g/mol (molar mass of O) = 0.250 mol

Next, we need to find the simplest whole number ratio of K to O. To do this, we divide each number of moles by the smaller number of moles (in this case, 0.250 mol):

Moles of K / Moles of O = 0.500 mol / 0.250 mol = 2.00

This means that the ratio of K to O in the compound is 2:1.

Therefore, the empirical formula of the compound is K2O.

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Answer:A.) Mechanical and nuclear

Explanation:

iv,e got nuthing sorry im only a kid i have to leared that yet

answer:

B) Radiant and Thermal

explanation:

  "In a flashlight, chemical energy in the batteries is converted to electrical energy when the circuit including the batteries, switch and light bulb is completed. The electrical energy is converted to light (electromagnetic / radiant energy) and some heat (thermal energy) by the light bulb." -https://www.crosbyisd.org/cms/lib6/TX02216626/Centricity/Domain/392/6_9C-EnergyFormsConversions.pdf

The idea of the atomic nature of matter was first developed by John Dalton.

He introduced the atomic theory, which proposed that matter was made up of tiny, indivisible particles called atoms. This theory was based on his observations and experiments on the behavior of gases

.Dalton's atomic theory had several postulates that helped explain the properties of matter. These postulates were:

All matter is made up of atoms, which are tiny, indivisible particles

.Each element is composed of atoms that are identical in size, shape, and chemical properties.

Atoms of different elements have different sizes, shapes, and chemical properties.

Atoms combine in fixed ratios to form compounds, and the ratios of their masses are related by whole numbers.

Atoms are indestructible and cannot be created or destroyed in chemical reactions

.However, Dalton's atomic theory was later modified and expanded upon by other scientists, including J.J. Thomson, Ernest Rutherford, and Niels Bohr, as new discoveries about the structure and behavior of atoms were made.

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Answer:

133.85 K

Explanation:

Initial pressure, P₁ = 635 torr

Initial temperature, T₁ = 67.0°C = 340 K

Final pressure, P₂ = 250 torr

We need to find the new temperature. The relation between temperature and pressure is given by :

\(\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\T_2=\dfrac{P_2T_1}{P_1}\\\\T_2=\dfrac{250\times 340}{635}\\\\T_2=133.85\ K\)

So, the new temperature is equal to 133.85 K.