Why is molarity more common than percent as a way of referring to concentration?.

Answer:

Firms produce goods and services,which they sell to households in return for revenue.

Answer: Goods and Services

Explanation:

Sodium bicarbonate or beta-alanine used to improve anaerobic performances exert their effect on the slow rate of decrease of creatine phosphate.

Anaerobic means "with the air" and refers to the body's use of oxygen to produce energy. This typically includes exercises that last longer than 2 minutes. Continuous "steady state" exercise is done with aerobic exercise. Anaerobic means "without air" and refers to the body's ability to produce energy without using oxygen.

Examples of aerobic exercise include swimming laps, running, or cycling. Anaerobic exercise involves a rapid burst of energy and is performed with maximum effort in a short period of time. Examples include jumping, sprinting, and lifting heavy objects. "Walking is a great aerobic exercise. It's thought to be weight-bearing and good for bone strength and health," he says. Oftentimes, people feel unwell and want to lose weight and get fit, but think they need a gym membership to exercise.

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Answer:

True

Explanation:

Cell specialization is the process by which generic cells change into cells meant to do certain tasks within the body

hope this helps :)

The elements would most likely attain a noble-gas configuration of He, Ne, Ar, or Kr. The appropriate elements for their respective bins are Se would gain two electrons to attain a noble-gas configuration of Kr. Sr would lose two electrons to attain a noble-gas configuration of Kr.

Noble gases are the most stable elements because their outermost electron shells are fully occupied, which is what the other elements aim to achieve. Noble gas configuration is the electron configuration of noble gases, which are the most stable elements. The electron configuration of the nearest noble gas is achieved by adding or removing electrons from the atom. Each of the seven periods in the periodic table corresponds to a specific block of the periodic table. The 1s block is called the first period, the 2s2p block is the second period, and so on.

The elements Li, Al, O, P, K, Se, and Sr belong to different blocks of the periodic table, so they each have different electron configurations.

The electron configurations of Li, Al, O, P, K, Se, and Sr are 1s2 2s1, [Ne] 3s2 3p1, [He] 2s2 2p4, [Ne] 3s2 3p3, [Ar] 4s1, [Ar] 3d10 4s2 4p4, and [Kr] 5s2, respectively.

To achieve a noble-gas configuration, these elements would lose or gain electrons as follows: Li would lose one electron to attain a noble-gas configuration of He. Al would lose three electrons to attain a noble-gas configuration of Ne. O would gain two electrons to attain a noble-gas configuration of Ne.

P would gain three electrons to attain a noble-gas configuration of Ar. K would lose one electron to attain a noble-gas configuration of Kr.

Se would gain two electrons to attain a noble-gas configuration of Kr. Sr would lose two electrons to attain a noble-gas configuration of Kr.

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The goal of this experiment is to determine the reaction rate, for the oxidation of iodide by persulfate.

To achieve this, you would first conduct a series of experiments under varying conditions, such as different concentrations and temperatures. By observing how the rate of reaction changes with these variables, you can establish the reaction rate and rate law. The reaction mechanism can be deduced by analyzing the intermediates and steps involved in the conversion of reactants to products.

Meanwhile, the activation energy can be determined from the temperature dependence of the reaction rate, typically through an Arrhenius plot. Lastly, the frequency factor, which represents the frequency of collisions between reactant molecules, can be calculated using the activation energy and rate constant. Together, these parameters provide valuable insights into the oxidation of iodide by persulfate, allowing for a comprehensive understanding of this important reaction. So therefore the goal of this experiment is to determine the reaction rate, for the oxidation of iodide by persulfate.

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In this question, we need to determine what will be the nuclear equation for the Beta decay of Lead - 210.

Beta decay is a type of radioactive decay in which we will have either a neutron becoming a proton, this will be called Beta-minus decay or a proton becoming a neutron, this will be called a Beta-plus decay

In the case of Pb-210, we will have a Beta-minus decay, and one neutron will become a proton:

210/82 Pb ---> 210/83 Bi + electron

Lead - 210 will become Bismuth - 210

A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.

An ideal gas is that whose particles have negligible volume and intermolecular forces.

A 1.50 L vessel at 25.0 °C contains He at a pressure of 3.04 atm.

We will use the following expression.

K = °C + 273.15 = 25.0 + 273.15 = 298.2 K

We will use the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 3.04 atm × 1.50 L / (0.0821 atm.L/mol.K) × 298.2 K = 0.186 mol

The molar mass of He is 4.00 g/mol.

0.186 mol × 4.00 g/mol = 0.744 g

A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.

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It is used in the design of engines, where changes in pressure and temperature are used to convert thermal energy into mechanical work. It is also used in meteorology to predict weather patterns and in the study of the Earth's atmosphere.

Pressure and temperature are two fundamental physical quantities that are closely related in many physical processes. Understanding the relationship between these two quantities is essential in many scientific and engineering fields. This relationship can be described by the ideal gas law, which states that the pressure of an ideal gas is directly proportional to its temperature when the volume and number of particles are constant. In other words, when the temperature of a gas increases, its pressure increases, and vice versa. This can be explained by the kinetic theory of gases, which assumes that gases are made up of a large number of small particles that are in constant motion. The speed of these particles is proportional to the temperature of the gas. As the temperature of the gas increases, the particles move faster and collide more frequently with the walls of the container, resulting in an increase in pressure. Similarly, when the temperature of the gas decreases, the particles move slower and collide less frequently with the walls of the container, resulting in a decrease in pressure. This relationship between pressure and temperature is essential in many scientific and engineering applications.

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Taking into account the Gay-Lussac's law, the new pressure of the chamber is 569.295 kPa.

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of shocks against the walls increases, that is, the pressure increases.

That is, the gas pressure is directly proportional to its temperature: when there is a constant volume, as the temperature increases, the gas pressure increases, and when the temperature decreases, gas pressure decreases.

Gay-Lussac's law can be expressed mathematically as follows:

P÷T= k

Considering an initial state 1 and a final state 2, it is fulfilled:

P₁÷T₁= P₂÷T₂

In this case, you know:

Replacing in Gay-Lussac's law:

450 kPa÷ 298 K= P₂÷ 377 K

Solving:

(450 kPa÷ 298 K)× 377 K= P₂

569.295 kPa= P₂

Finally, 569.295 kPa will be the new pressure.

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\(\qquad\qquad\huge\underline{{\sf Answer}}♨\)

If temperature remains constant, then we can apply the formula :

\(\qquad \tt \dashrightarrow \:p_1v_1 = p_2v_2\)

\(\qquad \tt \dashrightarrow \:4 \times v_1 = 6 \times 18\)

\(\qquad \tt \dashrightarrow \: v_1 = 108 \div 4\)

\(\qquad \tt \dashrightarrow \:v_1 = 27\)

So, the required volume is 27 litres

Answer: Fe (iron)

Explanation:

the whole number next to the symbols on the periodic table that ascend in order by 1 are the atomic numbers, just look for the symbol next to the number 26.

Answer:

B

Explanation:

the pH scale is based on the function

1x10-14

So since pH is neutral the concentration of OH and H must be equal hence the only option in which the concetration would [OH]{H}= 1x10-14 would be when both are equal so it cannot be a or d and when they are expressed in concetration so the only option is B.

The pH of the solution can be used to give the relation between the pOH and the hydroxide ion concentration. The concentration of hydroxide ions is 1 ×10⁻⁷. Thus, option B is correct.

pOH is the measure of the hydroxide ion in the solution. The hydroxide concentration from pH is related as:

pH = - log [H⁺]

[H⁺] = 10⁻⁷

= 1 × 10⁻⁷

The hydroxide concentration from hydrogen concentration is calculated as:

[H⁺][OH⁻] = 1 × 10⁻¹⁴

[OH⁻] = (1 × 10⁻¹⁴) ÷ (1 × 10⁻⁷)

= 1 ×10⁻⁷

Therefore, option B. 1 ×10⁻⁷ is the hydroxide ion concentration.

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Answer:

Because alkenes are hydrocarbons with at least one carbon-carbon double bond the alkene homologous series starts at ethene C2H4.

Explanation:

Answer:false

Explanation:becuase mass always be constant it doesnt increase or decrease

Answer:

no change in the temperature of the gas.

Explanation:

isothermal process of a gas, can result to compression of the gas or expansion of the gas at a constant temperature (ΔT = 0).

For isothermal gas expansion, work is done in reducing the pressure of the gas by increasing its volume at a constant temperature. The change in the internal energy of this process is zero (ΔU = 0).

For isothermal gas compression, work is done in decreasing the volume of the gas by increasing its pressure at a constant temperature. The change in the internal energy of this process is also zero (ΔU = 0).

Therefore, when a gas undergoes an isothermal process, there is no change in the temperature of the gas.

Answer:

A one mL per minute rate (or slower) is recommended for best results in a fractional distillation; simple can go faster. Slow, gradual distillation essentially allows the best equilibration and heat transfer. If you heat too fast, vapors may not condense as quickly as desired, and may waste some of the column.

For a chemical reaction in a closed system, mass cannot be (created) or  (destroyed). We can say that throughout the reaction mass is (conversed). Hence, the answer is: D. created; destroyed; conserved.

In chemistry, the law of conversation states that in an isolated system, certain physical property does not change over time. For example, if two reactants react and produce gas, this system's total mass remains the same as the initial mass. Hence, the mass cannot be created or destroyed. It also applies to energy. It cannot be created or destroyed, but just changed from one form of energy to the other.

This question seems incomplete. The complete query is as follows:

“For a chemical reaction in a closed system, mass cannot be ______________ or _______________. We can say that throughout the reaction mass is _____________.

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Answer:

Give up 2 electrons.

Explanation:

Is this ever a good question!!!

Electrons have a minus charge

Protons have a plus charge.

You need to understand it thoroughly.  I used to explain it this way.

Suppose the protons and electrons are playing a game and the electrons commit a foul that leaves them with 2 men short.

That means there are 2 unguarded plus's around. The result is that the minuses have lost two men who are in the sin bin. (I watch a lot of hockey).

So a +2 means that the electrons have lost two of their players to penalties.

Put in the vocabulary of your question, you give up 2 electrons.

The statement that proteins have an asymmetrical tertiary structure, while multi-subunit proteins can exhibit several types of symmetry is a true one.

Proteins are called complex macromolecules which consists of one or more polypeptide chains that fold into different three-dimensional structures. The polypeptide chains in a protein are asymmetric, but the overall multi subunits in the protein structure exhibits a wide variety range of symmetries. Because the classes of point-group symmetry involves a defined number of subunits to be arranged about one or more axes of symmetry. Thereby the symmetry reduces when more than one polypeptide chain is incorporated into a specific subunit of the protein thereby resulting in the formation of one more asymmetric unit in the strucure of protein.

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Answer:

carbon dioxide and oxygen

Human activities are the primary cause of acid rain. The burning of fossil fuels in power plants and vehicles releases large amounts of SO2 and NOx into the atmosphere, which then contribute to the formation of acid rain. Other sources of acid rain include industrial processes, such as mining and smelting, and natural sources, such as volcanic eruptions.

"Acid rain occurs as wet or dry deposition and is mostly due to human activities." Acid rain is a term used to describe precipitation that has high levels of acidity. It is formed when emissions from burning fossil fuels, such as coal and oil, mix with water in the atmosphere. These emissions contain sulfur dioxide (SO2) and nitrogen oxides (NOx), which react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid. These acids then mix with the rainwater or snow and fall to the ground.

Acid rain can occur as both wet and dry deposition. Wet deposition is when the acid rain falls directly to the ground in the form of rain, sleet, snow, or hail. Dry deposition is when the acid chemicals in the air settle on the ground or other surfaces without any precipitation.

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Answer:

hey kunal why arent you talking and also the answer is c \

Explanation:

A charged particle is a particle with an electric charge. It may be an ion, a molecule or atom. A neutral particle is striking a positive particle, breaking it into more neutral and positive particles describes the charges of the particles involved. The correct option is A.

The matter can be defined as any material with mass and occupies a space. The smallest unit of the matter is called the atom. In matter the charged particles or subatomic particles are negatively charged electrons, positively charged protons and neutral neutrons.

In the process nuclear fusion, the two lighter nuclei fuse together to form a heavier nucleus with the simultaneous release of huge amount of energy. One of the nuclei may be the proton.

When a charged particles interact with the matter, it will split the matter to generate some charged particles and another stable neutral particle.

Thus the correct option is C.

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If 50 g of potassium nitrate is added to 100 g of water at 30 degrees Celcius, 30 gram of potassium nitrate will not dissolve.

A solubility curve is a curve that is produced when the amount of solute that dissolves in a given volume of solvent is plotted against the temperature of the solution formed.

A solubility curve can be used to predict the amount of a given solute that will dissolve in a given amount of solvent at a particular temperature.

The solubility curve of potassium nitrate is shown in the attachment.

At 30°C, the solubility of potassium nitrate is 20 g/100 g of water.

Hence, the amount of potassium nitrate that will remain undissolved when 50 g of it is added to 100 g of water at 30°C will be:

Amount left undissolved = 50 - 20 g

Amount left undissolved = 30

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The mass of ammonia that can be produced from the reaction of 74.2 g of N₂ and 14.0 moles of H₂ is 90.1 g.

The mole ratio of the reaction for the production of ammonia is obtained from the balanced equation of the reaction as follows:

Equation of the reaction: N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)

The mole ratio of the reactants nitrogen and hydrogen is 1 : 3

Moles of nitrogen in 74.2 g of nitrogen = 74.2/28

Moles of nitrogen in 74.2 g of nitrogen = 2.65 moles

Moles of hydrogen present = 14.0 moles

The limiting reactant is nitrogen

Mole ratio of nitrogen to ammonia is 1 : 2

Mass of ammonia produced = 2.65 * 2 * 17 g

Mass of ammonia produced =  90.1 g

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Answer:Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

Explanation:

Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

Answer:

(B) summer solstice

Explanation: hope this helps!

An enzyme works to catalyze a reaction by lowering the activation energy of the reaction. Option 4) "it lowers the activation energy of a reaction" is the correct answer.

Enzymes are protein molecules that act as biological catalysts in living organisms. They facilitate chemical reactions by providing an alternative pathway with a lower activation energy. The activation energy is the energy required to initiate a chemical reaction and is usually a barrier that needs to be overcome for the reaction to proceed.

Enzymes achieve this by binding to the reactant molecules, called substrates, and orienting them in a way that allows them to undergo the reaction more readily. The enzyme's active site, a specific region on the enzyme's surface, provides a favorable environment for the reaction to occur.

When the substrate binds to the enzyme's active site, the enzyme-substrate complex is formed. This complex undergoes specific interactions, such as hydrogen bonding and electrostatic interactions, which stabilize the transition state of the reaction.

Importantly, enzymes do not change the overall free energy change or equilibrium position of a reaction. They only accelerate the rate at which equilibrium is reached by lowering the activation energy.

By lowering the activation energy, enzymes enable chemical reactions to occur at biologically relevant temperatures and speeds. They allow cells to carry out essential metabolic reactions efficiently, ensuring the proper functioning of biological processes.

Option 4

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Answer:

Math:

"Basic Math and Pre-Algebra For Dummies" by Mark Zegarelli

"Algebra For Dummies" by Mary Jane Sterling

"Geometry For Dummies" by Mark Ryan

"Calculus For Dummies" by Mark Ryan

Computer Science/Programming:

"Python Crash Course" by Eric Matthes (for beginners)

"Head First Java" by Kathy Sierra and Bert Bates (for beginners)

"The Pragmatic Programmer" by Andrew Hunt and David Thomas (for more advanced developers)

Biology:

"Biology: Concepts and Investigations" by Marielle Hoefnagels

"Campbell Biology" by Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece

Chemistry:

"Chemistry: The Central Science" by Theodore E. Brown, H. Eugene

"Organic Chemistry as a Second Language" by David R. Klein

. Some popular online learning platforms include Coursera, Khan Academy, Udemy, and edX.

Explanation:

Good luck with your learning journey!

Answer:

Yes because it is something that cannot be turned back