Which is not a conjugate acid-base pair, respectively?.

Answer: 1.215 × 10^4  i think

Explanation:

Answer:

Tha answer I s D. Hope it will work to u

Thermal energy is the difference between internal energies of two or more substances. Therefore, option A is correct.

The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is done in the process.

The average kinetic energy of the system's component particles as a result of their motion makes up the thermal energy of the system. The sum of the kinetic and potential energies of the system's component particles represents the system's overall internal energy.

Thermal energy is also referred to as heat energy. A moving object's kinetic energy is its energy. Thermal energy is a type of kinetic energy because it is produced by moving particles.

Thus, option A is correct.

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The amount of carbon dioxide produced from the combustion of a candle formula depends on the specific formula and the mass of the candle. However, on average, the combustion of one gram of wax in a candle produces approximately 3 grams of carbon dioxide.

Most candles are made of paraffin wax, which is a hydrocarbon with the general formula CnH2n+2. Let's assume that we are dealing with a simple hydrocarbon, such as C25H52 (a common component of paraffin wax).

During combustion, the hydrocarbon reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). The balanced chemical equation for the combustion of C25H52 is:

C25H52 + 38O2 → 25CO2 + 26H2O

To find the grams of CO2 produced, we need to know the mass of C25H52 that is combusted. For example, let's say we have 1 mole of C25H52 (molecular weight = 25*12.01 + 52*1.01 = 352.76 g/mol).

From the balanced equation, 1 mole of C25H52 produces 25 moles of CO2. The molecular weight of CO2 is 12.01 (C) + 2*16.00 (O) = 44.01 g/mol. So, the mass of CO2 produced from 1 mole of C25H52 is:

25 moles CO2 * 44.01 g/mol = 1100.25 grams of CO2

So, in this example, the combustion of 1 mole (352.76 grams) of C25H52 from a candle produces 1100.25 grams of carbon dioxide.

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Answer: C) 1.6

Explanation: I got it right

In order to reduce the risk of radiation exposure to individuals and environmental contamination, radioactive wastes are kept. The wastes' radioactivity decreases over time.

Large steel and concrete barrels that contain the garbage are typically properly sealed, although accidents and leaks can still happen. Cancerous growths can result from the severe negative impacts of nuclear waste on life.

Currently, dry casks are used to store all of the nuclear waste that a power plant produces over the course of its lifetime. Since 1987, Yucca Mountain in Nevada has been intended as a permanent disposal location for spent nuclear material.

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Answer

what do you mean?

Explanation:

im confused

Answer:

Sorry. I don't understand

Explanation:

The relative abundance of isotopes is the number of atoms of a particular isotope divide by the total number of atoms of all isotopes of that element, multiplied 100 percent.

The relative abundance of an isotope is the percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element.

Also relative abundances refers to the relative proportions of the stable isotopes of each element. They are most often quoted as atom percentages

To calculate the percent abundance of each isotope in a sample of an element,  the number of atoms of a particular isotope is usually divide by the total number of atoms of all isotopes of that element and then multiply the result by 100 since it is expressed in percentage.

Mathematically, the formula for relative abundance is given as;

R.A = ( number of atoms of isotope / total number of atoms ) x 100%

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An alloy is made of two or more different metals.These metals are of different sizes. This cause a distortion in the system and leads to a slide of of atoms when a force is applied and make it brittle.

Alloys are mixed metals. They are widely used in constructions, in electronic devices and in other industries due to their potential application superior over the pure metals.

There are atoms of various sizes in an alloy. The layers of atoms in pure metal are distorted by the smaller or larger atoms. This indicates that more force is needed to get the layers to slide over one another. Compared to pure metal, the alloy is tougher and more durable.

The irregularity of the atoms that make up high-entropy alloys is what gives is their immense strength. When the alloy is deformed, this disorder makes it difficult for the alloy's dislocation flaws to migrate through its crystal structure. But under adequate pressure, this also makes the alloy highly brittle.

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Answer:

A. 1s²2s²

B. 1s²

C. 1s²

D. 1s²2s²2p⁶

Explanation:

The valency electron is the outer electron of an element. The valency electron resides in the outermost region of the shell.

Using the general configuration for the first 20 elements 2 8 8 2 the valency electrons can be identified.

A. 1s²2s²2p⁶3s² . The valency electron here are 2p⁶ and 3s² . Removing the valency electron we have 1s²2s²

B. 1s² 2s² 2p⁶. After removing the valency electron the configuration will be 1s².

C.1s²2s². After removing the valency electron the configuration will be 1s²

D.1s²2s²2p⁶3s¹. Removing the valency electron the electron configuration will be 1s²2s²2p⁶

The atomic radius identifies the average distance between two nuclei of the same element bonded together.

In the periodic table, the larger the group to which the element belongs, the smaller the atomic radius. The groups of the periodic table refer to the columns. So in the first column is group IA and in the last column is group VIIIA.

We are going to classify the elements we are given by the group they belong to and so we can order them according to their increasing atomic radius.

Potassium ---> IA

Calcium--->IIA

Bromine --->VIIA

Arsenic--->VA

In the case of a catalytic converter, metal catalysts such as platinum, palladium, and rhodium are utilized.

Platinum may be used to oxidize and reduce exhaust emissions, however due to its high cost, it is less frequently utilized in industry.

A catalytic converter is a device used to minimize the emission of gaseous pollutants such carbon monoxide (CO), nitrogen oxides, and hydrocarbons. It is installed in the front portion of an automobile's exhaust system, near to the engine.

The purpose of a catalytic converter is to transform toxic pollutants from an internal combustion engine into less damaging substances like water, carbon dioxide, and nitrogen.

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The given statement "The four types of media used in fire suppression systems are water, foam, chemical, and halogenated gas" is true because these are the main types of media used to suppress or extinguish fires in various settings, each with their own specific applications and advantages.

Let us learn what is a fire suppression system. A fire suppression system is a kind of system that prevents or stops fires from spreading by extinguishing them. Fire suppression systems come in a variety of shapes and sizes, but they all have one thing in common: they keep fires from expanding beyond their initial boundaries.

A fire suppression system may be triggered automatically, such as when it detects smoke, or manually, such as when someone pulls a fire alarm.

Types of media used in fire suppression systems are:- Water- Foam- Chemical- Halogenated gas.

Therefore, the given statement is true.

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Hydrogen chloride (HCl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and NaCl(aq).

The reactants in the following equation:

HCl (a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na C l (aq) are hydrogen chloride (HC l) and sodium bicarbonate (NaHCO3).

Explanation:

A reactant is a substance that undergoes change during a chemical reaction. A reaction equation includes the symbols and formulas of reactants and products, along with the physical states of the substances, as they appear before and after the reaction.

The chemical reaction in this question is: HC l(a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na Cl (a q)In this equation, the reactants are H Cl (a q) and NaHCO3(a q), which are in an aqueous state.

Therefore, hydrogen chloride (H Cl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and Na Cl (a q).

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Among the following species, HI has the least polar bond.

Polar covalent bond: The bond formed between two atoms having difference in electronegativity by sharing electrons.

Electronegativity is the tendency of an atom to attract electrons toward it and the trend of electronegativity in the modern periodic table is it generally increases as you move from left to right across a period and decreases as you move down a group.

Now, compared to HF, HCl, HBr, and HI the electrons shared between the atoms hydrogen and iodine are weak because iodine is a 5th-period element and has the least electronegativity hence the least polar bond between hydrogen and iodine molecule.

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Answer:

bombarding it with an energetic particle

Explanation:  nuclear reaction, a change in the identity or characteristics of an atomic nucleus, induced by bombarding it with an energetic particle. The bombarding particle may be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy-ion.

If an increase in concentration of a substance in the ECF and the diffusion rate into a cell initially increases, but then immediately it is attempted again with no change in the rate of diffusion, the most logical conclusion is that the concentration gradient has been saturated.

What is diffusion?Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration. The concentration gradient, temperature, and the size of the molecules influence the rate of diffusion.The diffusion rate into a cell is dependent on the concentration gradient, which is the difference between the concentration of a substance in the extracellular fluid and intracellular fluid.

When the concentration gradient is steep, the diffusion rate is higher, and when it is less steep, the diffusion rate is lower. Therefore, if the concentration of a substance in the ECF is increased, the concentration gradient increases, and the diffusion rate into a cell initially increases.The immediate attempt at increasing the concentration of a substance in the ECF with no change in the rate of diffusion implies that the concentration gradient has become saturated. At saturation, the concentration gradient cannot increase any further, and the rate of diffusion remains constant, irrespective of any increase in the concentration of the substance in the ECF.

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Therefore, both a halving and doubling of [RX] have no effect on the reaction rate.

noun that can be counted. Amounts become two times larger or eight times larger, respectively, when they are multiplied by a factor of two or eight.  Just what "by a factor of" means It translates as a loss of value of just 10%. Clearly defined in this usage: component (American Heritage): To express an increase or reduction in a measurement, a quantity is multiplied or divided by the indicated quantity: By a factor of 10, the rate rose. Factor (Merriam-Webster): *a quantity by which a given quantity is multiplied or divided to indicate a difference in measurement; "costs increased by a factor of 10".

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Answer:

943.82 ml

Explanation:

Assuming constant pressure

V1/T1 = V2/T2

T2 * V1/T1 = V2       ( T must be in K units)

(220 + 273.15) * 540 / (273.15 + 9) = 943.8 ml

Due to the bent structure of the molecule, water (H2O) is polar. Due to the shape, the majority of the hydrogen atoms' positive charge is on one side of the molecule while the negative charge from the oxygen atoms is on the other. Polar covalent chemical bonding is demonstrated here.

A substance or object undergoes a physical change when it is utilised in a combination, changes phases, or changes appearance. More crucially, a physical alteration does not affect a substance's molecular makeup. The following three are examples of physical changes in water that exclusively affect their respective phases:

When liquid water freezes, it solidifies.

Boiling water transforms liquid into gas

When liquid water evaporates, it turns into gaseous water.

On the other hand, a chemical change occurs when the molecules that made up the original substance are split up and then put back together in new combinations that are distinct from the original combinations. When water is electrolyzed, oxygen and hydrogen molecules are created as a result of the process.\

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The water is the polar compound and its geometry is bent because the oxygen atom has a greater attraction for electrons than the hydrogen atom does.

Water is the polar compound and its geometry is bent and not the linear due to the electronegativity difference in between the oxygen atom and the hydrogen atom. the electronegativity of the hydrogen is the 2.1 and the electronegativity of the oxygen is the 3.5. if the electronegativity difference is less than compound more likely form the covalent bond and when it is high the atoms form the ionic bond.

Thus, in the case of the water molecule  , the oxygen and hydrogen is the non metal and the oxygen is more electronegative than the hydrogen atom so they form covalent bond but it is polar molecule.

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Answer:

Balanced forces do not cause a change in motion.

The result is no motion. Balanced forces can cancel each other out. Any time there is a balanced force, the object does not move.

Explanation:

Answer:

The result is no motion. Balanced forces can cancel each other out. Any time there is a balanced force, the object does not move.

Explanation: MARK MOST BRAINLIEST PLEASE

The mass of carbon dioxide released during the reaction is 2.6 grams.

To determine the mass of carbon dioxide released during the reaction between sodium hydrogen carbonate (NaHCO3) and acetic acid (CH3COOH), we need to calculate the difference in mass before and after the reaction.

Before the reaction:

Mass of NaHCO3 = 3.8 g

Mass of acetic acid = 10.5 g

Total mass before the reaction = Mass of NaHCO3 + Mass of acetic acid = 3.8 g + 10.5 g = 14.3 g

After the reaction:

Mass of the contents of the reaction vessel = 11.7 g

To find the mass of carbon dioxide released, we calculate the difference in mass:

Mass of carbon dioxide released = Total mass before the reaction - Mass of the contents of the reaction vessel

= 14.3 g - 11.7 g

= 2.6 g

Therefore, the mass of carbon dioxide released during the reaction is 2.6 grams.

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Answer:

The more variation in a species, the less likely the chance that species has of surviving. false

Explanation:

The total mass of 4 tin is in grams is 580 grams and in kg is 0.58kg.

One tin of chopped tomatoes weight is 145 grams

and we have to calculate it for 4

so for 4

145*4 =580 grams

and we have to change it into kilograms so

580 /1000  = .58kg

By 1,000, divide the number of grams.

To convert from grams to kilograms, simply divide by 1,000 because there are 1,000 grams in every kilogram. If necessary, construct the equation using fractions. Put the number of grams over 1 and divide it by the conversion factor, which is 1 kg / 1,000 g. Your answer in kilograms will result from the cancellation of the grams. Remember to use the appropriate units to mark your response.

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The amount of energy required to evaporate a given number of moles of pentene is given by the formula:

ΔHvap = energy/mole Rearranging the formula gives:

Mol = Energy/ΔHvap Substituting the given values, we get:

mol = (88 J) / (29.82 kJ/mol) = 0.0029488 mol Rounding to the correct number of significant digits gives:

Moles = 0.003 Moles

Thus, 0.003 moles of pentene can be evaporated while supplying 88 J of energy.

What is evaporation?

When a liquid becomes a gas, this process is called evaporation. If you boil water in a pot, you can observe the evaporation. Evaporation is done in two ways:evaporation and boiling.  

What is the difference between vaporize and vaporize?

Evaporation is defined as a phase transition of a compound or element that occurs during the boiling or sublimation process. Evaporation is just a type of evaporation that normally occurs at temperatures below the boiling point.  

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Answer:

This is an example of chemical change because the Kool aid dissolved and turned the water red

The formula for Ka  is used to determine the mass of benzoic acid that is needed to be dissolved in a 350.0 mL of water to produce a solution with a pH = 2.85 and Ka=6.3*10^-5.

given :

Ka = [H3O+][C6H5COO-]/[C6H5COOH]

Since the pH is known, we can use the equation pH = -log[H3O+] to find the concentration of hydronium ions in the solution.

2.85 = -log[H3O+] [H3O+] = 5.01 × 10-3 M

We assume that the benzoic acid fully dissociates so that [C6H5COO-] = [H3O+] and [C6H5COOH] - [H3O+]

Substituting the values into the formula gives

Ka = [5.01 × 10-3][5.01  10-3]/[C6H5COOH] Ka = 2.51  10-5M1, so we will solve for [C6H5COOH].

Rearranging the equation for Ka, we obtain [C6H5COOH] = [H3O+]. 2 /[C6H5COO-] 2.51 × 10-5 = (5.01 × 10-3)2 / [C6H5COOH] [C6H5COOH] = (5.01  10-3) 2 / (2.51 × 10-5) = 1003.98 M

As the solution requires the presence of benzoic acid in 350.0 mL of water,

We will use the equation:

Mass = (molarity) (molecular mass) (volume) Mass = (1003.98) (122.12 g/mol) (0.3500 L) Mass = 43.4 g

The mass of benzoic acid that would dissolve in 350.0 mL of water to produce a solution with a pH of 2.85 is 43.4 g.

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Answer:

67.58%  

Explanation:

First we convert the masses of the reactants into moles, using their respective molar masses:

By looking at the reaction equation, we know that 1.32 moles of Cl₂ would react completely with (2 * 1.32) 2.64 moles of Na. There are not as many Na moles, so Na is the limiting reactant.

Now we calculate how many NaCl moles would have been produced if all the limiting reactant was consumed:

We convert those moles to grams:

Finally we calculate the percent yield: