how much would the temperature of 275 g of water increase if 36.5 kj of heat were added? specific heat of water is 4.184 j/g°c. 1 calorie

The statement which is true about the fuel cell is that It has an electrolyte that acts as a salt bridge.

A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity.

The fuel cell has an electrolyte that acts as a salt bridge.

As electrolytes are nothing but the salts which are present at the inner side of the U-Tube considered as Salt bridge present in fuel cell.

In this way, Fuel cell has electrolyte that acts as a salt bridge.

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The element being oxidized is Phosphorus (P)

The element being reduced is Hydrogen (H)

There is no spectator ion in this reaction.

The oxidizing agent is Oxygen (O2)

The reducing agent is Phosphorus (H3P)

Transferring electrons from one species (the reducing agent) to another in a redox reaction, sometimes referred to as an oxidation-reduction process, is what happens (the oxidising agent).

Phosphorus (P) undergoes oxidation in the given reaction, going from an oxidation state of +3 to +5, while hydrogen (H) undergoes reduction, going from an oxidation state of +1 to 0.

As oxygen (O2) accepts electrons from phosphorus (P), oxidising it, oxygen (O2) is acting as the oxidising agent. As Oxygen (O2) receives electron donations from Phosphorus (H3P), which is serving as the reducing agent, it is reduced.

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Answer: Could you be more specific?

Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.

a wrong

b wrong

c right

d wrong

The balanced ionic equation for the reaction between sodium thiosulfate and sulfuric acid is Sodium thiosulfate + Sulfuric acid → Sodium bisulfate + Sulfur dioxide + Water.

An ionic equation is a chemical equation in which the electrolytes in aqueous solution are stated as dissociated ions. It is similar to a molecular equation in which substances are described as molecules.

A chemical equation known as an ionic equation uses individual ions to represent the formulae of dissolved aqueous solutions. The presence of so many different ions can make it more difficult to visually understand what is happening in the reaction, even if this form more properly depicts the mixture of ions in solution.

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3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I.

When 3C⁻⁻ is reacted with HI, the reaction product obtained is I⁻⁻⁻ as the main product. The C₂H₅I and H⁻ are not produced in significant quantities and cannot be considered the main product.The 3C⁻⁻ compound reacts with HI in the presence of a solvent to produce hydrogen gas, H⁻, C₂H₅I, and I⁻⁻⁻. The primary product obtained is I⁻⁻⁻ because it is stable and has a higher energy than C₂H₅I and H⁻.However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions. The reaction must be carried out in anhydrous conditions and at a low temperature so that the reaction proceeds in the desired direction.

3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I. However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions.

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The estimated relative contribution of C3 plants is approximately 88%, while the estimated relative contribution of C4 plants is approximately 12% to the organic matter in Kenya's soil.

To determine the relative contribution of C3 and C4 plants to the organic matter in Kenya's soil, we can use the difference in stable carbon isotopic compositions (δ13C values) between these plant types.

C3 and C4 plants have distinct δ13C values due to differences in their carbon fixation pathways. C3 plants generally have δ13C values ranging from -22 to -33 permil, while C4 plants typically exhibit δ13C values from -9 to -16 permil.

Given that the stable carbon isotopic composition (δ13C) of the soil organic matter in Kenya is -18 permil, we can compare this value to the δ13C values of C3 and C4 plants to estimate their relative contributions.

Let's denote the relative contribution of C3 plants as "x" and the relative contribution of C4 plants as "y." Since the contributions of C3 and C4 plants sum up to 100%, we have the equation:

x + y = 100% (equation 1)

Now, let's assign the δ13C values to the contributions of C3 and C4 plants. Assuming the air δ13C value is -7 permil, we can write the following equations:

-18 = x * (-33) + y * (-16) + (-7) * (1 - x - y) (equation 2)

Solving equations 1 and 2 simultaneously will provide us with the relative contributions of C3 and C4 plants.

Using the given δ13C values and solving the equations, we find:

x ≈ 0.88 (or 88%)

y ≈ 0.12 (or 12%)

Therefore, the estimated relative contribution of C3 plants is approximately 88%, while the estimated relative contribution of C4 plants is approximately 12% to the organic matter in Kenya's soil.

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The sawtooth pattern observed in the two-year chart of carbon dioxide measurements from Mauna Loa, Hawaii, is a result of seasonal variations and human activities.

Carbon dioxide levels increase during the winter months when plants are dormant and decrease during the summer months when they are actively photosynthesizing. Additionally, human activities such as burning fossil fuels and deforestation contribute to the overall increase in carbon dioxide levels. The sawtooth pattern provides valuable data for scientists studying the impacts of climate change and global warming. It also serves as a reminder of the urgent need to reduce carbon emissions and adopt sustainable practices to mitigate the effects of climate change.

The sawtooth pattern observed in the two-year chart of carbon dioxide (CO2) measurements from Mauna Loa, Hawaii, is primarily due to seasonal fluctuations in plant growth and decay. During spring and summer, increased photosynthesis in the Northern Hemisphere absorbs CO2 from the atmosphere, causing a decrease in CO2 levels. Conversely, during fall and winter, reduced photosynthesis and increased plant decay release CO2 back into the atmosphere, resulting in a rise in CO2 levels. This cyclical pattern creates the sawtooth appearance on the chart, while the overall trend still shows a continuous increase in atmospheric CO2 levels due to human activities.

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Answer:

When gaseous state changes into liquid state the molecules slow down in speed because of decrease in energy molecules come slightly closer to each other.

Answer:

To make H2O, you need two H and one O. in this equation, you are given two Os which is too many. you'll end up with an extra O. H2 + O2 -> H2O + O

Oxygen gas (O2) is obtained at the anode and hydrogen gas (H2) at the cathode.

A process known as electrolysis takes place when an electric current is transmitted through a solution. The flow of electric current during electrolysis causes chemical reactions to occur in the solution at the electrodes (anode and cathode).

Tetraoxosulphate VI acid in aqueous form is electrolyzed to produce oxygen gas (O2) at the anode and hydrogen gas (H2) at the cathode.

It is significant to remember that the precise electrolytic reactions might change based on the concentration, temperature, and electrode materials.

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Before measuring the absorbance of a diluted solution using a spectrophotometer, it is necessary to identify the path length of the sample cell. The path length refers to the distance that light travels through the solution in the cell, and it is typically measured in centimeters.

The absorbance of a solution depends on the concentration of the absorbing substance, the path length of the cell, and the molar absorptivity of the substance at a given wavelength. The molar absorptivity, also known as the extinction coefficient, is a constant that reflects the efficiency of a substance in absorbing light at a specific wavelength.

However, in order to use Beer's Law (A = εbc) to calculate the concentration of the absorbing substance in a solution, it is necessary to know the path length (b) of the cell. Therefore, it is important to measure or know the path length of the cell before measuring the absorbance of the diluted solutions in order to calculate the concentration of the absorbing substance accurately.

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the half-reactions

cathode : Zn²⁺ (aq) + 2e⁻ ---> Zn (s)  

anode : Mg (s) → Mg²⁺ (aq) + 2e−

a balanced cell reaction

Zn²⁺(aq) + Mg(s)→ Zn(s) + Mg²⁺ (aq)

Given

Zn and Mg electrodes

Required

The half-reactions for a galvanic cell

Solution

To determine the reaction of a voltaic cell, we must determine the metal that serves as the anode and the metal that serves as the cathode.

To determine this, we can either know from the standard potential value of the cell or use the voltaic series

1. voltaic series

Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au

The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent

So the metal on the left will easily undergo oxidation and function as anode

Since Mg is located to the left of Zn, then Mg functions as anode and Zn as a cathode

2. Standard potentials cell of Mg and Zn metals :

Mg2+ + 2e– → Mg E° = -2,35 V

Zn2+ + 2e– → Zn E° = -0,78 V

The anode has a smaller E°, then Mg is the anode and Zn is the cathode.

Answer:

Explanation:help

The statements that best describe Bridget's recorded observations are:

1 A television is a device that converts electrical energy into heat and light energy.

2 Electrical energy may be converted into other types of energy.

3 Sound energy is created by combining heat and light energy.

4 Electrical energy may be converted into motion energy.

Energy transfer is the process of transferring energy from one system to another, such as by heat, work, or mass transfer.

Energy is required for living organisms to grow, breathe, reproduce, and move. Because energy cannot be created from a vacuum or a void, it must be transported via the biosphere. The sun is the principal source of energy for practically every ecosystem on Earth.

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Full Question:

Bridget performed an investigation to determine if a television set transformed electrical energy into other types of energy. She recorded her observations in a table. What statement best describes the results?

Question Observation

Does it transform into heat energy?

Does it transform into light energy?

Does it transform into sound energy?

Does it transform into energy of motion?

Answer:

C

Explanation:

d=300

t=6hr

speed=?

speed=300/6

speed=50m/hr the important thing in this question is to get the right units

Dilution of the solution can be calculated by the formula of the molarity and volume. The initial volume of 2.50 M solution was 30 mL.

Molar concentration or the dilution factor is in an inverse relationship and with an increase in the dilution, the molarity of the solution decreases.

Given,

Initial molarity = 2.50 M

initial volume = ?

Final molarity = 0.750 M

Final volume = 100.0 ml

Substituting values in the formula:

\(\begin{aligned}\rm V_{1} &= \rm \dfrac{M_{2}V_{2}}{M_{1}}\\\\&= \dfrac{0.750 \times 100}{2.50}\\\\&= 30 \;\rm mL\end{aligned}\)

Therefore, 30 mL was the initial volume of the solution before it was diluted.

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When atoms or molecules absorb energy, it is often released as light energy

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Answer:

4.9 x 10²²hockey pucks

Explanation:

Given parameters:

Number of moles of hockey  = 0.0814moles

Unknown:

Number of pucks there = ?

Solution:

A mole of a substance is made up of Avogadro's number of particles.

Therefore;

       1 mole of hockey pucks will contain 6.02 x 10²³ hockey pucks

       0.0814 mole of hockey pucks will contain :

                              0.0814 x 6.02 x 10²³ = 4.9 x 10²²hockey pucks

Answer:

67.8%

Explanation:

La reacción de descomposición del CaCO₃ es:

CaCO₃ → CO₂ + CaO

Donde 1 mol de CaCO₃ al descomponerse produce 1 mol de CO₂ y 1 mol de CaO.

Usando la ley general de los gases, las moles de dioxido de carbono son:

PV = nRT.

Donde P es presión (1atm), V es volumen (20L), n son moles de gas, R es la constante de los gases (0.082atmL/molK) y T es temperatura absoluta (15 + 273.15 = 288.15K). Reemplazando los valores en la ecuación:

PV / RT = n

1atmₓ20L / 0.082atmL/molKₓ288.15K = 0.846 moles

Como 1 mol de CO₂ es producido desde 1 mol de CaCO₃, las moles iniciales de CaCO₃ son 0.846moles.

La masa molar de CaCO₃ es 100.087g/mol. Así, la masa de 0.846moles de CaCO₃ es:

0.846moles ₓ (100.087g / mol) = 84.7g de CaCO₃

Así, la pureza del marmol es:

(84.7g de CaCO₃ / 125g) ₓ 100 =

The balanced chemical equation is:

0.5C7H16 + O2 → 0.5CO2 + H2O

For balancing the chemical equation C7H16 + O2 → CO2 + H2O, we can use linear algebraic techniques. We need to determine the coefficients that balance the number of atoms on both sides of the equation.

Let's denote the coefficients for C7H16, O2, CO2, and H2O as a, b, c, and d, respectively.

The balanced chemical equation can be written as:

aC7H16 + bO2 → cCO2 + dH2O

To balance the carbon (C) atoms, we have:

7a = c (Equation 1)

To balance the hydrogen (H) atoms, we have:

16a = 2d (Equation 2)

To balance the oxygen (O) atoms, we have:

2b = 2c + d (Equation 3)

We have three equations (Equations 1, 2, and 3) and four unknowns (a, b, c, d). To solve this system of equations, we can write it in matrix form and find the solution using linear algebraic techniques.

The augmented matrix for the system of equations is:

[ 7 0 -1 0 | 0 ]

[ 0 0 0 -2 | 0 ]

[ 0 -2 2 -1 | 0 ]

By performing row operations to row-reduce the augmented matrix, we can obtain the solution:

[ 1 0 -0.5 0 ]

[ 0 1 -1 -0.5 ]

[ 0 0 0 0 ]

The solution to the system of equations is:

a = 0.5

b = 1

c = 0.5

d = 1

Putting the values of a,b,c, and d we get the balanced chemical equation as:

0.5C7H16 + O2 → 0.5CO2 + H2O

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Answer:

I hate to not answer and have you repost this if you could repost it with the choices by clicking the arrow I can figure it out a lot faster and I'll copy and paste to show you that it's right

Explanation:

I'm good with history biology sum math so if you want to do what I asked and reposted I can give you the answers and I will show that they are correct I won't just guess like some people do just to get points cuz I don't care about points I just get on here to help people

Answer: The answer for the blanks is initial appearance and than final appearance.

Explanation:

One of the internal control activities that would most likely justify reducing the assessment of the risks of material misstatement for long-term notes payable is the use of long-term debt covenants.Explanation:Internal controls are policies and procedures put in place to ensure that a company's financial statements are accurate and reliable. This aims to reduce the risks of material misstatement. Long-term notes payable are a type of long-term debt that needs to be monitored.The use of long-term debt covenants is an internal control activity that can help reduce the assessment of the risks of material misstatement for long-term notes payable. Long-term debt covenants are conditions or restrictions that lenders put in place to ensure that borrowers abide by the terms of the loan agreement. It usually includes financial ratios, interest rate restrictions, etc. The use of these covenants helps ensure that borrowers meet their financial obligations, which reduces the risk of default. As such, auditors can rely on the use of long-term debt covenants as an internal control activity to justify reducing the assessment of the risks of material misstatement for long-term notes payable.

Internal control activities is a process carried out on the mandate of the board of directors or management in an organization that aims to protect company assets, and ensure compliance with applicable laws and regulations. Control Activities According to James A. Hall (2011: 190) activities Control activities are the various policies and procedures used to ensure that appropriate actions have been taken to address identified company risks.

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To solve for the specific heat capacity of aluminum, we can use the formula:
q = m × c × ΔT, Where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

First, we need to calculate the heat transferred from the aluminum to the water:

q = mAl × cAl × ΔTAl
q = (3.90 g) × cAl × (28.6°C - 99.3°C)
q = -978 J

Note that we get a negative value for q because heat is transferred from the aluminum to the water, so the aluminum loses heat.

Next, we can calculate the heat gained by the water:

q = mwater × cwater × ΔTwater

q = (10.0 g) × cw × (28.6°C - 22.6°C)
q = 240 J

Setting these two equations equal to each other, we can solve for the specific heat capacity of aluminum:

mAl × cAl × ΔTAl = mwater × cwater × ΔTwater
cAl = (mwater × cw × ΔTwater) / (mAl × ΔTAl)
cAl = (10.0 g) × (4.184 J/g·°C) × (28.6°C - 22.6°C) / [(3.90 g) × (99.3°C - 28.6°C)]
cAl = 0.900 J/g·°C

Therefore, the specific heat capacity of aluminum is 0.900 J/g·°C.

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The two products formed when 1-chlorobutane is treated with sodium hydroxide are 1-butene and 1-butanol.

The common name of 1-chlorobutane is Butyl chloride. The reaction of  1 -chlorobutane with sodium hydroxide is catalyzed by sodium iodide to give 1 -butanol.

1-Butene is the compound with the formula CH₃CH₂CH=CH₂. This is a colorless gas which easily condensed to give a colorless liquid. 1-butene is classified as a linear alpha-olefin. It is the organic compound with the formula CH3CH2CH=CH2.

1-Butanol is known as butan-1-ol or n-butanol. It is a primary alcohol with the chemical formula C₄H₉OH. It is of linear structure. The Isomers of 1-butanol are butan-2-ol and tert-butanol. It refers to the straight chain isomer.

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Answer:

9.77x10⁻³M HCl

Explanation:

Assuming the solution of AgNO₃ is in excess:

Based on the chemical equation:

AgNO₃ + HCl → AgCl + HNO₃

We must find the moles of AgCl that will be produced. With the moles and knowing 1 mole of AgCl is produced from 1 mole of HCl we can find the moles of HCl and its concentration as follows:

Moles AgCl -Molar mass: 143.32g/mol-:

0.7g AgCl * (1mol / 143.32g) = 4.88x10⁻³moles AgCl = Moles HCl

As the volume of the solution is 500cm³ = 0.500L, the concentration of HCl is:

4.88x10⁻³moles HCl / 0.500L =

All of the above statements are correct. The Total Maximum Daily Load (TMDL) program addresses both nutrient concentrations and nonuniform mixing of pollution.

The Total Maximum Daily Load (TMDL) program is an environmental management approach that aims to address water pollution and improve water quality. It considers both nutrient concentrations, such as phosphorus and nitrogen, and nonuniform mixing of pollutants within water bodies.

In the context of the TMDL program, markets for water quality problems refer to the trading of pollution credits. This means that entities, such as municipal sewage treatment plants, counties, industrial point sources, and brokers, can participate in the buying and selling of pollution credits to meet their regulatory requirements. This trading system allows for a more flexible and cost-effective approach to reducing pollution levels.

The statement that markets for water quality problems are more complex than for carbon dioxide emissions or fishery management is valid. Water quality problems involve diverse pollutants and sources, making the market dynamics more intricate compared to carbon dioxide emissions trading or fishery management.

Furthermore, negotiations within the TMDL program can be bilateral, involving direct agreements between two parties, or they can involve multiple parties. Negotiations often focus on determining fair and mutually beneficial exchanges of pollution credits.

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The methods used to monitor a reaction as it occurs in the reaction flask are d) all the above

A polarimeter is an analytical hardware component that measures the polarization of light and is used to analyze the optical activity of chemicals. Optical activity refers to the ability of a material to rotate polarized light and the extent to which such a phenomenon occurs.

A spectrometer is one of the scientific instrument/method used to separate and measure the spectral components of physical phenomena. A spectrometer is a broad term often used to describe an instrument that measures a continuous variable of a phenomenon whose spectral components are mixed in some way.

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