please help explain Ohm's law​

36.2L of N2 can be produced.

1st) According to the stoichiometry of the reaction, 2 moles of NaN3 produce 3 moles of N2. Using the molar mass of NaN3 (65.0g/mol ) and N2 (28.0g/mol) we can convert the moles to mass, and we can see that with 130.0g of NaN3 we can produce 84.0g of N2.

Now, we can use a mathematical rule of three to calculate the grams of N2 that can be produced from 71.0g of NaN3:

So, 45.9g of N2 are produced from 71.0g of NaN3.

2nd) It is necessary to convert the grams of N2 produced to moles, so we can use it in the Ideal gas equation:

Now we know that 1.6mol of N2 are produced.

3rd) To calculate the volume of N2, it is necessary to use the Ideal gas equation and replace the values of Pressure (P), Temperature (T, in Kelvin) and Number of moles (n):

Finally, 36.2L of N2 can be produced from 71.0g of NaN3.

At the transition stage, one form of matter starts getting converted into another form of matter.

Solid, liquid and gas are the three phases in which matter occur in nature. Matter is interconvertible in nature i.e it can be converted from one form to another.

Melting, freezing and evaporation are the three phases of transition.

Liquid water at low temperature freezes to form solid ice. This process is known as freezing. Whereas, liquid water when provided high temperature or heat releases vapours. This process is known as evaporation. Solid ice when brought at room temperature gets converted back into liquid water. This process is known as melting.

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Answer:

2NH4^+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l)

Explanation:

Molecular balanced reaction equation;

2NH4Cl (aq) + Mg(OH)2---->2NH3 (g) + 2H2O (l) + MgCl2 (aq)

Complete ionic reaction equation;

2NH4^+(aq) + 2Cl^-(aq) + Mg^2+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l) + Mg^2+(aq) + 2Cl^-(aq)

Net Ionic reaction equation;

2NH4^+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l)

Carlotta can respond by explaining the difference between a physical mixture and a chemical compound. The main difference between a physical mixture and a chemical compound lies in their composition and properties.

A physical mixture, also known as a mixture, is a combination of two or more substances that are physically combined but retain their individual chemical properties. In a physical mixture, the substances can be present in varying proportions, and they can be separated by physical means, such as filtration or evaporation.

Each component of the mixture retains its original properties, and no new substances are formed. Examples of physical mixtures include saltwater, air, and a bag of mixed nuts.

On the other hand, a chemical compound is a substance composed of two or more different elements that are chemically combined in a fixed ratio. Chemical compounds are formed through chemical reactions, during which the atoms rearrange and form new chemical bonds.

The resulting compound has unique properties distinct from its individual elements. Chemical compounds have a definite composition and cannot be separated into their constituent elements by physical means alone. Examples of chemical compounds include water (H₂O), sodium chloride (NaCl), and carbon dioxide (CO₂).

In summary, A physical mixture is a combination of substances that can be separated by physical means and retains the individual properties of its components. A chemical compound is formed through a chemical reaction, has a fixed composition, and exhibits unique properties different from its constituent elements.

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In the Bohr model of an atom, the electrons travel in a defined circular orbit around the nucleus of the atom.

Bohr model is a description of the structure of atoms. According to the Bohr model, the electrons that are in the atom absorb energy by jumping to higher-level energy.

The electrons will then give off the energy in the form of a piece of light. This is then referred to as the photon. The photon simply signifies the energy that the electrons had earlier absorbed but fell back to a lower energy level.

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The correct name for the compound P₄S₁₀, used in the manufacture of safety matches, is (option D) tetraphosphorus decasulfide.

This compound is composed of four phosphorus atoms (P) and ten sulfur atoms (S), which gives it the name tetraphosphorus (for the four phosphorus atoms) and decasulfide (for the ten sulfur atoms).

Tetraphosphorus decasulfide is a type of phosphorus sulfide, but its specific formula sets it apart from other phosphorus sulfides that have different ratios of phosphorus and sulfur atoms. It is an important chemical used in safety matches because of its ability to ignite upon friction, providing a safe and controlled source of ignition. The compound's properties make it suitable for use in a variety of applications, including fire safety devices and signal flares.

In summary, the name tetraphosphorus decasulfide (option d) accurately reflects the composition of P₄S₁₀, a compound widely used in safety matches and other applications that require controlled ignition.

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Answer:

Sodium chloride is formed when sodium atoms interact with chlorine atoms.

Explanation:

When this occurs, sodium will donate an electron (which is a negatively-charged particle) to chlorine. This makes sodium slightly positive and chlorine slightly negative

Answer:

It continuously decreases.

Explanation:

the thermal motion makes the electrons to collide and disturb the free flow. Thus, conductivity is decreased.

Answer:

A mirror fog doesn’t fog up from a far distance because it does not have the circumstances to fog up. It must be at the same distance.

The fog in the mirror is the condensation of water vapor as it touches a colder surface. By running cold water you just cool down the bath tub and everything around it. Now the vapor coming from the hot shower will mostly condense right there and will not reach the mirror.

Answer:

New temperature T2 = 16.59°C Approx

Explanation:

Given:

Old volume V1 = 2.36 L

Old temperature T1 = 27°C

New volume V2 = 1.45 L

Find:

New temperature T2

Computation:

Using Charles's Law;

V1T2 = V2T1

(2.36)(T2) = (1.45)(27)

New temperature T2 = 16.59°C Approx

The final pressure of the gas is 1.71 * 10³ mmHg. Inviscid theory is typically used to calculate the final pressure following reattachment, albeit there are several instances where the pressure exceeds the inviscid value.

The force that the gas applies to the container boundaries is known as the gas's pressure. Along the designated volume, the gas molecules move at random. They bump into the ground and each other throughout this movement. The effect of each gas molecule is too small to be felt, let alone seen.

The final-to-initial pressure ratio is the opposite of the volume ratio. You can use this Boyle's law in any direction.

p₂ = p₁ × V₁ / V₂ or p₂ / p₁ = V₁ / V₂

Based on the given information,  

The initial volume of gas = 28.4 L.

The initial pressure of the gas = 725 mmHg.

The initial temperature given = 305 K.  

The final volume of the gas = 14.8 L.

The final temperature given = 375 K.

Now the final pressure of the gas can be determined using ideal gas equation,

P1V1/T1 = P2V2/T2

P2 = P1V1/T1 * T2/V2

P2 = 28.4 * 725 mm * 375 k / 305 k * 14.8

P2 = 7721250 / 4514 mm Hg

P2 =1710.5117mmHg

P2 = 1.71 * 10³ mmHg

The final pressure of the gas is 1.71 * 10³ mmHg

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A reactor, acetic acid, salicylic acid, and the use of an acetic anhydride to complete the reaction are all used in the production of aspirin.

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Answer:

The reason why atomic mass is usually not a whole number is because it is a weighted average of the mass numbers of isotopes

Explanation:

Explanation:

\(C_{(s)} + O_{2(g)} \rightleftharpoons CO_{2(g)}\)

According to le ch-atelier's principle when a chemical reaction at equilibrium subjected to any stress, then the equilibrium shifts in that direction in which effect of stress is reduced.

When we would add more number of carbon in above reaction then rate of forward reaction will increase to attain the equilibrium again.

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Molarity is the molar concentration of the chemical species of the solute dissolved in the solvent. The molarity of the solution when diluted is 0.0257 M.

The molar concentration or the molarity of the solution is inversely proportional to the dilution. An increased dilution will decrease the molarity of the solution.

The molarity is given by:

\(\rm Molarity = \dfrac{\text{number of moles }}{ \text{Volume of the solution in L}}\)

Also, it can be shown as:

\(\rm M_{1}V_{1}= M_{2}V_{2}\)

Given,

\(\rm M_{1}\)  = 0.513 M

\(\rm V_{1}\) = 25 mL

\(\rm M_{2}\) = ?

\(\rm V_{2}\) = 500 mL

Substitute value in the equation as:

\(\begin{aligned} \rm M_{1}V_{1}&= \rm M_{2}V_{2}\\\\0.513 \times 25 &= \rm M_{2} \times 500\\\\\rm M_{2} &= \dfrac{0.513 \times 25 }{500}\\\\&= 0.02565\;\rm M\end{aligned}\)

Therefore, 0.0257 M is the molarity after dilution.

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Reaction equilibrium is the situation in which a chemical reaction's forward and reverse reaction rates are equal. The system is said to be in a steady state when the concentrations of the reactants and products remain consistent across time.

In other terms, a chemical reaction is said to be in equilibrium when the concentrations of its reactants and products no longer change over time.

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Answer:

magnesium carbonate reacts with aqueous acids to release carbon dioxide and water

MgCO3 + 2 HCl → MgCl2 + CO2 + H2O.

How to -

Step 1: Reaction

- Leave the dilute hydrochloric acid in a beaker.

- Add Magnesium carbonate slowly until it is in excess or until no more gas seem to be getting liberated.

Step 2: Filtration

- Filter with filter paper and funnel.

- Filter off the excess magnesium carbonate as magnesium chloride will be in aqueous form (liquid) and will come out with the filtrate. The residue is the excess magnesium carbonate.

Step 3: Crystallization to obtain solid crystals from the filtrate.

- Pour filtrate solution into evaporating dish/basin

- Provide heat using Bunsen burner

- Pour solution into an evaporating basin and heat over a water bath

- Stop heating when crystals start to form

allow water to evaporate until pure crystals remain.

- Dry crystals using absorbent paper or warm oven.

Precautions

- Use personal protective equipment such as gloves, a lab coat and wear eye protection, especially when heating.

- Avoid inhaling unnecessary gases during the whole process.

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There are still a lot of intricate and dynamic components that can affect weather patterns, such as variations in air pressure, temperature, and humidity, even if technological and data analytic advancements have substantially improved weather forecasting.

Predicting the precise course and strength of a storm is challenging due to the possibility of unforeseen events and anomalies. The impact of extreme weather occurrences can be reduced with the help of ongoing technological and scientific developments, though forecasting accuracy can be increased.

Infrastructure should be able to resist the effects of strong storms and early warning systems that can warn people of impending danger from severe weather should both be present asides forecasting tools.

Not all nations have the financial resources necessary to fund the creation and use of these technologies. it is  ethical that wealthy nations assist developing nations in gaining access to these technology.

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Changing the pH will have an effect on a catalase-controlled reaction.

The correct statement is: "Increasing or decreasing the pH above or below the optimum level will decrease the activity."

What is catalase?

Catalase is an enzyme that is found in many living organisms, including plants, animals, and bacteria. It catalyzes the breakdown of hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2). This is an important reaction for cells because hydrogen peroxide is a toxic byproduct of many metabolic processes, and catalase helps to protect cells from its harmful effects.

Enzyme activity is influenced by the pH of the environment in which the reaction takes place. Each enzyme has an optimum pH range in which it functions most efficiently. Any deviation from this optimum pH range will lead to a decrease in enzyme activity. This is because changes in pH can alter the enzyme's shape and affect its ability to bind to the substrate or catalyze the reaction.

For catalase, the optimum pH range is typically between pH 7 and pH 11, depending on the specific source of the enzyme. If the pH is increased or decreased above or below this range, the enzyme activity will decrease.

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True, the relevance of Audit evidence and specific audit procedures depends on the assertion being tested. In an audit, assertions are representations made by management about the financial statements.

The auditor's role is to gather sufficient appropriate audit evidence to determine whether these assertions are reasonable and accurate. There are various assertions that auditors test, including:

1. Existence: Assets, liabilities, and equity interests exist at a specific date.
2. Rights and obligations: The entity holds rights to assets and is obligated for liabilities.
3. Completeness: All transactions and events are recorded in the financial statements.
4. Valuation and allocation: Assets, liabilities, and equity interests are recorded at appropriate amounts.
5. Presentation and disclosure: Components of the financial statements are appropriately presented and described.

To test each assertion, the auditor uses different types of audit evidence and procedures. For example, to test existence, the auditor may physically inspect assets or confirm balances with third parties. To test completeness, the auditor may perform analytical procedures to identify unusual trends or relationships.

The relevance of audit evidence refers to whether the evidence gathered pertains to the assertion being tested. Relevant evidence helps the auditor form a conclusion about the specific assertion. Similarly, specific audit procedures are tailored to address the risks associated with each assertion.

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The net absorbance with freeze-thaw treatment is 0.316, and that with 25°C treatment is 0.025.

Beet root segments were exposed to freeze-thaw treatment for 30 minutes and yielded absorbance values of 0.351, 0.301, and 0.297 at 470 nm. To obtain the net absorbance, these values were averaged, resulting in 0.316. Another set of segments exposed to 25°C for 30 minutes yielded a net average absorbance of 0.025 at 470 nm.

This shows that the freeze-thaw treatment caused more damage to the cells and resulted in a higher release of pigments than the 25°C treatment. The absorbance values obtained can be used to compare the effectiveness of different treatments on the release of pigments from cells.

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Differentiating pressure, cryogenic, liquid, and solid containers from a distance can be challenging, as their visual appearance may be similar. However, some general guidelines can help identify the type of container and the likely contents:

Pressure containers are typically cylindrical and have pressure relief valves, gauges, and safety fittings. They are designed to store gases under high pressure and are likely to contain compressed gases such as hydrogen, oxygen, or nitrogen.

Cryogenic containers are heavily insulated and designed to store liquefied gases at very low temperatures. They often have a distinctive shape, with a wide base and a narrow neck. Cryogenic containers may contain liquefied gases such as nitrogen, helium, or argon.

Liquid containers may be similar in appearance to cryogenic containers but do not require heavy insulation. They are designed to store liquids such as chemicals, fuels, or solvents.

Solid containers are typically smaller and may be made of plastic or metal. They are used to store solid hazardous materials such as explosives, flammable solids, or oxidizing agents.

It's important to note that hazardous materials can be stored in any type of container, and that the container itself may not always be a reliable indicator of the contents. Proper labeling, placarding, and handling procedures should always be followed to ensure the safe transport and storage of hazardous materials.

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Answer:

C.

Explanation:

The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. ... As the amplitude of the sound wave increases, the intensity of the sound increases. Sounds with higher intensities are perceived to be louder. Relative sound intensities are often given in units named decibels (dB).

The correct statement about the amplitude of a wave is option C. Thus, the larger the amplitude, the more the energy that is carried by the wave.

Amplitude of a wave is a parameter describing the intensity of the wave. Amplitude of a transverse wave and sinusoidal waves are measured as the distance between from the central point of a crest to its top or the the distance from the central point of the trough in the line to its bottom part.

The amplitude of a wave is directly proportional to the frequency of the wave and the frequency in turn is directly proportional to the energy of the wave.

Therefore, The correct statement about the amplitude of a wave is option C. Thus, the larger the amplitude, the more the energy that is carried by the wave.

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Answer:

B. Na2SO3 is one of the reactants

Explanation:

Answer: B. Na2SO3

Explanation:

A reactant is always left to the arrow and is a substance that is at the start of a chemical reaction (before the reaction / change occurs)

The one that is not a name given for the four outer planets terrestrial planets. The correct option is 3.

The planets Mercury, Venus, Earth, and Mars are referred to as terrestrial because their surfaces are compact and rocky, similar to Earth's terra firma. The terrestrial planets are the solar system's four innermost planets.

A terrestrial planet, telluric planet, or rocky planet is one that is primarily composed of silicate rocks or metals.

Mercury, Venus, Earth, and Mars are the inner planets in the Solar System that are closest to the Sun and are classified as terrestrial planets by the International Astronomical Union.

Astronomers who use the geophysical definition of a planet may consider two or three planetary-mass satellites, including the Earth's Moon, Io, and occasionally Europa, as terrestrial planets, along with the rocky protoplanet-asteroids Pallas and Vesta.

Thus, the correct option is 3.

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The substance which has the highest boiling point is \(NH_3\).

Ammonia is expected to have the highest boiling point among the given options. This is due to the fact that ammonia molecules are polar and capable of hydrogen bonding between molecules. Hydrogen bonding is a strong intermolecular force that requires a significant amount of energy to break, resulting in a higher boiling point.

In contrast, methane and carbon dioxide are nonpolar molecules and have only weak van der Waals forces, resulting in relatively low boiling points. hydrogen and CO (carbon monoxide) are also nonpolar molecules with only weak van der Waals forces, resulting in even lower boiling points than \(CH_4\) and \(CO_2\).

Thus, ammonia would have a higher boiling point than the other molecules listed due to its polar nature and the presence of hydrogen bonding.

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Answer:

Approximately \(0.35\; \rm W\) on average.

Explanation:

There are multiple to find power:

The question did not state the speed at which the arm of the chipmunk moves. However, the question did state the work done (\(W = 0.70\; \rm J\)) and the time required (\(t = 2\; \rm s\)).

Therefore, the equation \(P = W / t\) seem to be more suitable.

\(\begin{aligned}&P\\ &= \frac{W}{t} \\ &= \frac{0.70\; \rm J}{2\; \rm s} \approx 0.35\; \rm W\end{aligned}\).

Explanation: You know that the mass of an individual lead atom is equal to

3.4

⋅

10

−

22

grams.

A substance's density tells you what its mass per unit of volume is. In this case, you know that lead has a density of

11.3 g/cm

3

, which means that each

cm

3

of lead will have a mass of

11.3 g

.

Now, your cube has a volume of

2.00 cm

3

, which means that its mass will be equal to

2.00

cm

3

⋅

density



11.3 g

1

cm

3

=

22.6 g

Now all you have to do is look at the mass of one lead atom and figure out exactly how many lead atoms would be needed to make the total mass of the cube equal to

22.6 g

.

22.6

g

⋅

the mass per atom



1 lead atom

3.4

⋅

10

−

22

g

=

6.647

⋅

10

22

lead atoms

Rounded to two sig figs, the number of sig figs you have for the mass of an individual lead atom, the answer will be

no. of lead atoms

=

6.6

⋅

10

22

atoms

You can double-check this result by using lead's molar mass, which tells you what the exact mass of one mole of lead is.

22.6

g

⋅

1 mole Pb

207.2

g

=

0.1091 moles Pb

Now use Avogadro's number to determine how many atoms of lead you have in that many moles

0.1091

moles

⋅

6.022

⋅

10

23

atoms

1

mole

=

6.57

⋅

10

22

atoms

To two sig figs, you will once again get

no. of lead atoms

=

The beaker contains a total of 500 ml of solution with concentrations of 0.00050 M Ag, 0.00050 M Co2, and 0.00010 M Pb2 io

The beaker contains a total of 500 ml of solution with concentrations of 0.00050 M Ag, 0.00050 M Co2, and 0.00010 M in Pb2 ions. When 10.00 ml of 0.0010 M Na2CO3 is added to the beaker, the compound that will precipitate can be determined by comparing the moles of the metal ions present and the moles of carbonate ions in Na2CO3.

The metal ion with the lowest moles will precipitate. In this case, Pb^2+ has the lowest moles and will precipitate as PbCO3.

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Answer:

Fifth trust me

Explanation: