Complete and balance the following half-reaction: no−3(aq)→no(g)(acidic solution)no3−(aq)→no(g)(acidic solution) express your answer as a chemical equation. identify all of the phases in your answer.

Answer:

A derived unit is a unit that results from a mathematical combination of SI base units. We have already discussed volume and energy as two examples of derived units.

You can fill in the table for other elements and their respective isotopes by determining the appropriate number of protons, neutrons, and electrons based on the given isotope mass number and atomic number.

To accurately fill in the table with the correct number of subatomic particles for the elements given the isotope mass number, we need to consider the composition of atoms and their respective subatomic particles. Atoms are composed of protons, neutrons, and electrons.

The number of protons in an atom is equivalent to its atomic number, which uniquely identifies the element. The number of neutrons can be determined by subtracting the atomic number from the isotope mass number. Electrons in a neutral atom are equal to the number of protons.

Let's take an example using the isotope mass number:

Isotope: Carbon-14 (mass number = 14)

Element: Carbon (atomic number = 6)Based on the atomic number and isotope mass number, we can determine the number of subatomic particles as follows:

Protons: 6 (same as the atomic number)

Neutrons: 14 - 6 = 8

Electrons: 6 (same as the number of protons in a neutral atom)

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Answer:  A pressure of 0.681 atm would be exerted by 0.023 grams of oxygen \((O_2)\) if it occupies 31.6 mL at \(91^{o}C\).

Explanation:

Given : Mass of oxygen = 0.023 g

Volume = 31.6 mL

Convert mL into L as follows.

\(1 mL = 0.001 L\\31.6 mL = 31.6 mL \times \frac{0.001 L}{1 mL}\\= 0.0316 L\)

Temperature = \(91^{o}C = (91 + 273) K = 364 K\)

As molar mass of \(O_2\) is 32 g/mol. Hence, the number of moles of \(O_2\) are calculated as follows.

\(No. of moles = \frac{mass}{molar mass}\\= \frac{0.023 g}{32 g/mol}\\= 0.00072 mol\)

Using the ideal gas equation calculate the pressure exerted by given gas as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the value into above formula as follows.

\(PV = nRT\\P \times 0.0316 L = 0.00072 mol \times 0.0821 L atm/mol K \times 364 K\\P = \frac{0.00072 mol \times 0.0821 L atm/mol K \times 364 K}{0.0316 L}\\= 0.681 atm\)

Thus, we can conclude that a pressure of 0.681 atm would be exerted by 0.023 grams of oxygen \((O_2)\) if it occupies 31.6 mL at \(91^{o}C\).

The two types of inner transition metals are the lanthanides and the actinides. The lanthanides consist of the elements from cerium (atomic number 58) to lutetium (atomic number 71). The actinides consist of the elements from thorium (atomic number 90) to lawrencium (atomic number 103).

The lanthanides are also called the rare earth elements, and they tend to have similar chemical properties due to their close proximity on the periodic table. They are all silvery-white metals and are often used in industrial and manufacturing processes.
The actinides are also silvery-white metals, but they tend to be more radioactive than the lanthanides and have less predictable chemical properties. They are generally only found in small amounts in nature, and are mostly produced synthetically for research and industrial uses.

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Answer: \(H_2O_2\rightarrow H_2+O_2\)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for showing hydrogen peroxide decomposing into hydrogen and oxygen is:

\(H_2O_2\rightarrow H_2+O_2\)

We can use Boyle's law, which states that the pressure of a gas is inversely proportional to its volume at constant temperature. Mathematically, it can be expressed as P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

In this problem, we have:

P1 = 1 atm (since the balloon is filled with air at sea level)

V1 = 0.500 L

P2 = 3.25 atm

V2 = ?

Using Boyle's law, we can solve for V2:

P1V1 = P2V2

V2 = P1V1/P2

V2 = (1 atm)(0.500 L)/(3.25 atm)

V2 = 0.154 L

Therefore, the volume of the balloon at this depth is 0.154 L. The answer is option (b).

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Answer: The pH is 9.09.

Explanation:

This question involves the hydrolysis of a salt into a weak acid and strong base.

The fastest solution is found by using the equation:

\(\text{pH} = \frac12 \ \text{pK}_w + \frac12 \ \text{pK}_a + \frac12 \log C\)

where C represents the concentration of the solution.

We have:

Ka = 1.34 x 10^-5, so pKa = -log(1.34 x 10^-5) = 4.873

Kw = 1.0 x 10^-14, so pKw = -log(1.0 x 10^-14) = 14.00

C = 0.20, so log(C) = log(0.20) = -0.70

Then,

\(\text{pH} = \frac12 (4.873) + \frac12 (14.00) + \frac12 (-0.70) = 9.09\)

A solution that uses only fundamental chemistry techniques can be found by considering the chemical reactions involved.

The salt \(\text{C}_2\text{H}_5\text{COONa}\) will completely dissolve in solution into its ions:

\(\text{C}_2\text{H}_5\text{COONa} \text{ (aq)} \rightarrow \text{C}_2\text{H}_5\text{COO}^- \text{ (aq)} + \text{Na}^+ \text{ (aq)}\)

This shows that \([\text{C}_2\text{H}_5\text{COO}^-] = [\text{C}_2\text{H}_5\text{COONa}] = 0.20 \text{ M}\).

When water is added, an acid-base reaction occurs:

\(\text{C}_2\text{H}_5\text{COO}^- \text{ (aq)} + \text{H}_2\text{O} \text{ (l)} \rightleftharpoons \text{C}_2\text{H}_5\text{COOH} \text{ (aq)} + \text{OH}^- \text{ (aq)}\)

Using a RICE (Reaction-Initial-Change-Equilibrium) table, we can write the following analysis:

0.20                       N/A                0                        0       (initial conc.)
- x                           N/A                + x                      + x    (change)
-------------------------------------------------------------------------
(0.20 - x)                N/A                 x                        x       (equilibrium)

Then, we can write the forward base-reaction constant:

\(\text{K}_b = \frac{[\text{C}_2\text{H}_5\text{COOH}][\text{OH}^-]}{[\text{C}_2\text{H}_5\text{COO}^-]} = \frac{(x)(x)}{0.20-x} = \frac{x^2}{0.20-x}\)

We have \(\text{K}_a = 1.34 \times 10^{-5}\) and we also know that \(\text{K}_w = \text{K}_a \times \text{K}_b\). It follows that:

\(\text{K}_b = \frac{\text{K}_w}{\text{K}_a} = \frac{1.0 \times 10^{-14}}{1.34 \times 10^{-5}} = 7.46 \times 10^{-10}\)

Since Kb is very small, we may assume that \((0.20 - x) \approx 0.20\). Then,

\(7.46 \times 10^{-10} = \frac{x^2}{0.20} \quad \rightarrow \quad x \approx \sqrt{0.20(7.46 \times 10^{-10})} = 1.22 \times 10^{-5}\)

Then,

\([\text{OH}^-] = x = 1.22 \times 10^{-5}\)

\(\text{pOH} = -\log(1.22 \times 10^{-5}) = 4.91\)

Finally,

\(\text{pH} = \text{pK}_w - \text{pH} = 14.00 - 4.91 = 9.09\)

The hybridization of the central atom of PCl5 is sp3d.

The hybridization of the central atom in PCl5 is sp3d. In PCl5, phosphorus (P) forms five bonds with chlorine atoms. To determine the hybridization, we need to consider the number of electron groups around the central atom. In this case, there are five electron groups: four bonding pairs and one lone pair. The electron group geometry is trigonal bipyramidal.

The central atom undergoes hybridization to form new hybrid orbitals. The number of hybrid orbitals formed is equal to the number of electron groups. In the case of PCl5, the central phosphorus atom undergoes sp3d hybridization, which means it forms five sp3d hybrid orbitals.

These sp3d hybrid orbitals are arranged in a trigonal bipyramidal geometry, with three orbitals in the equatorial plane and two orbitals in the axial positions. The bonding pairs and lone pair occupy these hybrid orbitals, resulting in the formation of five P-Cl bonds and one lone pair on the central phosphorus atom.

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The central atom in PCl5 is phosphorus (P) and its hybridization is sp3d.

The hybridization of an atom refers to the mixing of atomic orbitals to form new hybrid orbitals that are used for bonding. In the case of PCl5, the phosphorus atom undergoes sp3d hybridization.

In sp3d hybridization, one s orbital, three p orbitals, and one d orbital from the valence shell of the phosphorus atom combine to form five sp3d hybrid orbitals. These hybrid orbitals are arranged in a trigonal bipyramidal geometry around the central phosphorus atom. The three hybrid orbitals are directed towards the equatorial positions, while the remaining two orbitals are perpendicular to the plane and directed towards the axial positions.

The sp3d hybrid orbitals of phosphorus overlap with the p orbitals of the chlorine atoms to form five sigma bonds. Each chlorine atom contributes one unhybridized p orbital to form these sigma bonds with the phosphorus atom. Thus, in PCl5, phosphorus is surrounded by five chlorine atoms, each sharing a single bond.

In summary, the hybridization of the central atom phosphorus in PCl5 is sp3d, and it forms five sigma bonds with chlorine atoms.

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Answer:

your answer is C

Explanation:

The electron-dot structure of NH3 places one set of nonbonding electrons in the valence shell of the nitrogen atom. that means there are three bonded atoms and one single pair for a coordination number of four surrounding  the nitrogen, the same occurs in water to. along with the Lewis dot structure for ammonia, NH3. the non bonding atoms are basically like hydrogen atoms the try to refuse to bond and they can't be fused unless the right conditions are met.

An object sliding on a surface eventually stops due to friction.

Friction is a force that opposes motion between two surfaces that are in contact with each other. When an object is sliding on a surface, there is friction between the object and the surface, which acts in the opposite direction to the motion of the object.

Friction is caused by the microscopic irregularities on the surfaces that are in contact with each other. As the object slides along the surface, these irregularities cause interlocking between the object and the surface, which resists the motion of the object.

As an object slides on a surface, the frictional force gradually slows it down until it comes to a stop. The amount of time it takes for an object to stop sliding depends on factors such as the initial speed of the object, the mass of the object, and the strength of the frictional force.

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The amount of heat gained by the water is 500 calories. Thus, option D is correct.

Given:

Mass of water (m) = 100 g

Change in temperature (ΔT) = 30°C - 25°C = 5°C

The specific heat capacity of water (c) is approximately 1 calorie/gram°C.

Now, the amount of heat gained by the water,

Q = mcΔT

Where:

Q is the heat gained or lost by the substance

m is the mass of the substance

c is the specific heat capacity of the substance

ΔT is the change in temperature

Plugging in the values into the formula:

Q = 100 × 1 × 5

Q = 500 calories

Therefore, the amount of heat gained by the water is 500 calories.

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A. The process responsible for adding moisture to the atmosphere that could eventually fuel a hurricane is evaporation of ocean water.

The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds.

The water cycle involves the following;

Thus, the process responsible for adding moisture to the atmosphere that could eventually fuel a hurricane is evaporation of ocean water.

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The most stable isotope among the the isotopic substance given from above is Plutonium-238.

The correct answer choice is option d.

Isotopy is the existence of a chemical element which result to having the same atomic number but different mass number.

From the given task above, the only isotope which is most stable is the Plutonium-238. This is because this isotope has a half life of alot of years; specifically; about 82,000,000 years.

Another interesting thing of factor which makes Plutonium-238 the most state from above is that Plutonium-238 itself decays into uranium-240 through alpha radiation.

There are three different types of radiation in science, these are as follows:

In conclusion, we can now deduced from the above solution that Plutonium-238 is the most stable isotope from above.

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The rate of effusion of a gas is inversely proportional to its molar mass.

Therefore, the gas with the molar mass closest to that of nitrogen (14 g/mol) will have the most similar rate of effusion to nitrogen at 350 K.

The gas with the molar mass closest to that of nitrogen is hydrogen (1 g/mol). Therefore, the gas with the most similar rate of effusion to nitrogen at 350 K is hydrogen (H2). The other gases (CH4, CO, CO2, and Ne)

all have molar masses significantly higher than nitrogen, and therefore they will have slower rates of effusion than nitrogen at 350 K.

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Answer:

yea hold them in your hand for a while and your hand will look like a rainbow

Explanation:

Answer:

D

Explanation:

Because she is continuously using the same piece of clay, the mas does not change.

Answer:

45.4249414 or about 45.42 liters

Explanation:

We know the gas tank holds 12 gallons, but we want to find the capacity in liters.

There are 3.785411784 liters  in one gallon. Therefore, to convert from gallons to liters, multiply the number of gallons by 3.785411784

liters =  3.785411784 * gallons

The gas tank holds 12 gallons. Plug 12 in.

liters = 3.785411784 * 12

liters = 45.4249414

Let's round to the nearest hundredth. The 4 in the thousandth place tells us to leave the 2 in the tenth place.

liters ≈ 45.42

The capacity in liters is 45.4249414 or about 45.42

When the temperature of a gas decrease the pressure also decrease. That is option B.

Temperature is defined as the quantity that measures the degree of how hot or cold an object or medium is.

When the temperature of a medium increases there would be increase in the collision between the molecules that is found in the medium.

The increase in intermolecular collision leads to increase in pressure of the medium. Subsequently, when there is decrease in temperature, the pressure of the medium also falls.

Therefore, it can be said that the temperature of a gas decreases which causes the pressure to also decrease.

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The oxidation number of specified element in each compound or polyatomic ion is given below :

i) C in ZnCO3 : +4

ii) Fe in Fe(NO3)2 : +2

iii) Cl in ClF4- : +5

iv) S in S2O3 2- : +2

Simply put, an element's oxidation number is the number assigned to it in a chemical combination. The number of electrons that atoms in a molecule can share, lose, or gain while forming chemical connections with other atoms of a different element is known as the oxidation number.

Oxidation state is another name for oxidation number. However, depending on whether or not we are taking into account the electronegativity of the atoms, these phrases might occasionally have a different meaning. In coordination chemistry, the phrase "oxidation number" is commonly employed.

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Answer:The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.

Explanation:step-by-step

Answer:

FALSE

Explanation:

I just took the test and put true and it was wrong so it's false. Hope this helps and please mark brainliest!

Answer:

≈ 0.104 liters  

Explanation:

We can use Boyle's Law: \(P_{1}V_{1} = P_{2}V_{2}\)

P₁ = 2.50 atm

V₁ = 25.0 mL

P₂ = 457 mmHg

V₂ = ?

Because pressure should be in atm we will convert 457 mmHg to units in atm:

1 atm = 760mmHg so we can divide 457 by 760 and we get ≈ 0.601atm

Next we can plug in the units to the equation for Boyle's Law:

(2.50)(25.0) = (0.601)(V₂)

Solve for V₂

V₂ will give you ≈ 104mL or 0.104L

Either is correct depending on which unit they are asking you to use

Answer:

C

Explanation:

Boyle's law states that "the volume of a given mass of gas is inversely proportional to its pressure at constant temperature."

Inverse proportionality means that as one quantity is increasing, the other quantity is decreasing and vice versa.

Hence, as the pressure was increased, the volume decreases accordingly in obedience to Boyle's law.

Answer:

What is TRUE about the missing volume is option C.

C. The volume will decrease due to inverse relationship of V & P

Explanation:

The given parameters of the gas are;

The initial pressure of the gas, P₁ = 2 atm

The initial volume of the gas, V₁ = 1.5 L

The final pressure of the gas, P₂ = 2 atm

Boyle's law states that, at constant temperature, the volume, 'V', of a given mass is inversely proportional to its pressure, 'P';

Mathematically, Boyle's law can be expressed as follows;

P ∝ 1/V

From which we have;

P·V = Constant

∴ P₁·V₁ = P₂·V₂

For the given gas, we get;

2 atm × 1.5 L = 6 atm × V₂

∴ V₂ = 2 atm × 1.5 L/(6 atm) = 0.5 L

Therefore, the volume decreases from 1.5 L to 0.5 L.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

v is the velocity

m is the mass

From the question we have

\(k = \frac{1}{2} \times 3500 \times {25}^{2} \\ = 1750 \times 625 \\ = 1093750 \: \: \: \: \: \)

We have the final answer as

Hope this helps you

Answer:

Ký hiệu hóa học (xem thêm ký hiệu) cho nước. Mỗi phân tử nước chứa hai nguyên tử hydro (H) liên kết với một nguyên tử oxy (O).

The chemical symbol (see also symbol) for water. Each molecule of water contains two atoms of hydrogen (H) joined to a single atom of oxygen (O).

Answer:

AlAsO4

Explanation:

Aluminium arsenate is an inorganic compound with the formula AlAsO4. It is most commonly found as an octahydrate. It is a colourless solid that is produced by the reaction between sodium arsenate and a soluble aluminium salt.

A reducing chemical reaction adds an electron to the substrate.

Reduction is a term used to describe the yield of electrons, the accumulation of hydrogen, or the reduction of oxygen from the substrate.

When a reactant accumulates electrons during a reaction, it is called reduction. Reduction reactions include the addition of electrons to a substrate and the donor of the electrons is a reducing agent that itself brings oxidization. Therefore a reducing chemical reaction retains the addition of electrons to a substrate.

Oxidation-reduction (redox) reactions consist of the transfer of electrons between compounds while catabolic reactions are the type of reactions in which complex substances are split down into simpler units with the discharge of energy. Therefore these options are incorrect

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As the hurricane moves over land, the hurricane is no longer fueled by this moisture. Therefore, the hurricane begins to slow down and die as it moves further inland. Hurricanes usually weaken when they hit land, because they are no longer being fed by the energy from the warm ocean waters.

The purpose of the lower air dam in the front of a vehicle is to improve aerodynamics and increase fuel efficiency. The air dam, also known as a front spoiler or splitter, is typically a protruding lip or panel located at the bottom of the front bumper.

When the vehicle is in motion, the air dam helps to redirect the airflow underneath the vehicle. It creates a smoother flow of air, reducing turbulence and minimizing drag. By reducing aerodynamic drag, the vehicle experiences less resistance, allowing it to move more efficiently through the air.

The improved aerodynamics provided by the lower air dam can result in reduced fuel consumption, as the engine does not have to work as hard to overcome air resistance. This makes the vehicle more fuel-efficient and can contribute to better overall performance.

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Phương trình NaOH sai nha