FILL IN THE BLANK. in general, the ionization energy of a singly-charged anion___as the electron affinity of the neutral atom___.

The standard change in free energy (ΔG°) for the given chemical equation at 298.15 K is approximately -4.26 kJ/mol.

To calculate the standard change in free energy (ΔG°) for the given chemical equation, we can use the equation,

ΔG° = ΔH° - TΔS°

Given the heat of formation data and the standard entropy data, we can substitute the values into the equation and calculate ΔG°.

ΔH° for the reaction = Σ(ΔH°f of products) - Σ(ΔH°f of reactants)

  = [ΔH°f(NH₄⁺(aq)) + ΔH°f(NO₃⁻(aq))] - ΔH°f(NH₄NO₃(s))

  = [-132.5 kJ/mol + (-205.0 kJ/mol)] - (-365.6 kJ/mol)

  = -337.5 kJ/mol + 365.6 kJ/mol

  = 28.1 kJ/mol

ΔS° for the reaction = Σ(S° of products) - Σ(S° of reactants)

  = [S°(NH₄⁺(aq)) + S°(NO₃⁻(aq))] - S°(NH₄NO₃(s))

  = [113.4 J/(mol·K) + 146.4 J/(mol·K)] - 151.1 J/(mol·K)

  = 259.8 J/(mol·K) - 151.1 J/(mol·K)

  = 108.7 J/(mol·K)

ΔG° = ΔH° - TΔS°

  = 28.1 kJ/mol - (298.15 K)(0.1087 kJ/(mol·K))

  = 28.1 kJ/mol - 32.36 kJ/mol

  = -4.26 kJ/mol

Therefore, the standard change in free energy (ΔG°) for the given chemical equation at 298.15 K is approximately -4.26 kJ/mol.

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The complete question is:

Consider the following chemical equation:

NH4NO3(s)⟶NH+4(aq)+NO−3(aq)

What is the standard change in free energy in kJmol at 298.15K?

The heat of formation data are as follows:

ΔH∘f,NH4NO3(s)=-365.6kJmolΔH∘f,NH+4(aq)=-132.5kJmolΔH∘f,NO−3(aq)=-205.0kJmol

The standard entropy data are as follows:

S∘NH4NO3(s)=151.1Jmol K

S∘NH+4(aq)=113.4Jmol K

S∘NO−3(aq)=146.4Jmol K

Answer:

In a closed system, the total energy before an energy transformation is __equal to__ the total energy after it.  

Explanation:

The Law of Conservation of Energy

((Also Study Island))

The time taken to decay from 308 g to 4.8125 g is approximately 114 days, or 3.8 months.

The radioactive decay formula is given by,N(t) = N0 * e^(-λ*t),

where N(t) is the amount of remaining radioactive sample at time t, N0 is the initial amount of the radioactive sample, λ is the decay constant, and e is the mathematical constant approximately equal to 2.71828.

Given,Initial mass, N0 = 308 g

Mass after decay, N(t) = 4.8125 g

We need to find the time taken to reach this decay.

First, we need to find the decay constant from the given half-life,The half-life of the given radioactive sample is 14.3 days.

We know that,Half-life, t(1/2) = 14.3 days.

Decay constant, λ = ln(2) / t(1/2)λ

= 0.0484 / day

Substitute the given values in the radioactive decay formula,N(t) = N0 * e^(-λ*t)

We get,4.8125 = 308 * e^(-0.0484 * t)

Divide both sides by 308,0.015625 = e^(-0.0484 * t)

Taking natural logarithm on both sides, ln(0.015625) = ln(e^(-0.0484 * t))

ln(0.015625) = -0.0484 * t

ln(0.015625) / -0.0484 = t

Hence, the time taken to decay from 308 g to 4.8125 g is approximately 114 days, or 3.8 months.

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Functional group can be interconverted into each ther by the means of suitable reagent. Functional group are responsible for the chemical and physical properties of a compound.

A group of atoms forming a component of a molecule that accounts for a particular function or chemical behavior is called a functional group. There are so many functional group in organic chemistry.

a. A skeletal chain goes up, down, up, down to C double bonded to O, up to O H is Carboxylic group COOH.

b. A skeletal chain goes up to O, down, up, down, up. A hexagonal ring is single bonded to C l on one corner. this belongs to cyclic substituted compound.

c. N has a pair of electron dots above, and is single bonded to R Superscript 1, wedge bonded to H, and wavy bonded to H. This belongs to primary amine compound.

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The condition that would most likely require the National Weather Service to issue a severe thunderstorm warning is "a meeting of two air masses with major differences in temperature and moisture."

Severe thunderstorms often form when there is a collision between two air masses with contrasting properties. This collision can create an unstable atmosphere and trigger the development of severe weather conditions, including thunderstorms.

When two air masses with significant differences in temperature and moisture interact, it creates a strong contrast in atmospheric conditions. The warm, moist air from one air mass clashes with the cooler, drier air from the other air mass. This clash sets the stage for intense convection and the potential for severe thunderstorm formation.

The collision of these air masses results in the rapid uplift of warm, moist air, leading to the formation of towering cumulonimbus clouds. These clouds are capable of producing severe weather phenomena, such as heavy rainfall, strong winds, hail, and even tornadoes.

Given the potential hazards associated with severe thunderstorms, including the risk of property damage and threats to human safety, it is crucial for the National Weather Service to issue timely warnings to alert the public and help them take necessary precautions.

By closely monitoring the conditions of air masses and identifying areas where major differences in temperature and moisture exist, meteorologists can anticipate the potential for severe thunderstorm development. This allows them to issue appropriate warnings and advisories to keep the public informed and safe during severe weather events.

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Answer:

Explanation:

Given isotope;

            C - 12

Unknown:

Atomic number = ?

Atomic mass  = ?

Solution:

Isotopes of an element have the same electronic configuration but only differ in their masses. They have the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.

 For carbon; atomic number  = 6

        Atomic mass of this isotope  = 12

The atomic number is the number of protons

Atomic mass is the number of protons and neutrons

The class of inhibitor that will bind to the active site of an enzyme and affect the Michaelis-Menten constant (Km) of the enzyme reaction, while not affecting the maximum velocity (Vmax) of the reaction, is a competitive inhibitor.

A competitive inhibitor competes with the substrate for binding to the active site of the enzyme. By binding to the active site, it prevents the substrate from binding and forming the enzyme-substrate complex. This leads to an increase in the apparent Km value because a higher concentration of substrate is required to achieve half of the maximum reaction rate. However, the Vmax remains unchanged because, in the presence of a competitive inhibitor, the reaction can still reach its maximum rate if a sufficiently high substrate concentration is provided to outcompete the inhibitor.

Overall, a competitive inhibitor affects the Km value by increasing it, indicating a reduced affinity between the enzyme and substrate, while the Vmax remains unaltered as the inhibitor does not directly affect the catalytic activity of the enzyme.

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Answer:

True

Explanation:

I just took that last year, and got a100%

True, Plants don't have brains, but they still adapt to their environments.

Adaptation is a process where they are changing their nature to suit the environment.

We have seen that plants do adaptation according to the environment, as in the summer season their leaves are hanging down but in the rainy season they show blossoms and green leaves. So, according to the environment for the survival and reproduction they adapt their body.

Hence, plants have no brains, but they still adapt.

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Answer:

chưa hiểu đáp ánkia cho lắm. Nhưng đáp án là ZnO nha

Explanation:

To determine the volume of nitrogen gas at -100.0°C and the same pressure (1.00 atm), we can use the combined gas law. The initial volume of the gas is given as 1.55 L at 27.0°C. By applying the combined gas law equation, we can calculate the final volume at the new temperature.

The combined gas law equation is given as:

(P₁ * V₁) / (T₁) = (P₂ * V₂) / (T₂)

Where:

P₁ and P₂ are the initial and final pressures,

V₁ and V₂ are the initial and final volumes,

T₁ and T₂ are the initial and final temperatures.

In this case, we are given the initial volume (V₁ = 1.55 L) and temperature (T₁ = 27.0°C) at a pressure of 1.00 atm. We want to find the final volume (V₂) at a new temperature of -100.0°C, with the same pressure of 1.00 atm. Converting the temperatures to Kelvin scale (T₁ = 27.0 + 273 = 300 K, T₂ = -100.0 + 273 = 173 K), we can set up the equation:

(1.00 atm * 1.55 L) / (300 K) = (1.00 atm * V₂) / (173 K)

Solving for V₂, we find:

V₂ = (1.00 atm * 1.55 L * 173 K) / (300 K)

V₂ ≈ 0.89 L

Therefore, the volume of the nitrogen gas at -100.0°C and 1.00 atm pressure would be approximately 0.89 L. The combined gas law allows us to relate the initial and final conditions of a gas sample when pressure, volume, and temperature change.

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The molar concentration of lithium ions in the Li3PO4 solution is 1.65 M.

To determine the molar concentration of lithium ions in a Li3PO4 solution, we need to consider the ratio of lithium ions to Li3PO4 in the compound.

In Li3PO4, there are three lithium ions (Li+) for every one formula unit of Li3PO4. Therefore, the molar concentration of lithium ions will be three times the molar concentration of Li3PO4.

Given that the molar concentration of Li3PO4 is 0.550 M, the molar concentration of lithium ions will be:

0.550 M × 3 = 1.65 M

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Answer:

11.0 L

Explanation:

The equation for this reaction is given as;

2H2  +  O2  -->  2H2O

2 mol of H2 reacts with 1 mol of O2 to form 2 mol of H2O

At STP;

1 mol = 22.4 L

This means;

44.8 L of H2 reacts with 22.4 L of O2 to form 44.8 L of H2O

In this reaction, the limiting reactant is H2 as O2 is in excess.

The relationship between H2 and H2O;

44.8 L = 44.8 L

11.0 L would produce x

Solving for x;

x = 11 * 44.8 / 44.8

x = 11.0 L

Round off to the correct number of significant figures is 9.2568 × 10^-8 m.

The total number of digits in a particular number—which is typically a measurement value—that contribute to the level of precision of that particular value are known as significant figures. The most crucial criterion is that "we always start counting at the first non-zero integer" governs the counting of significant numbers in a value.

In the realm of measurement and statistical data analysis, the idea of counting meaningful numbers is crucial. One more illustration to help you grasp our idea is the number 0.000. This number has zeros at the end of the decimal, hence there is a disagreement between points (3) and (4). Since there is no non-zero number that can be considered significant, there are no significant figures in this situation.

= (8.12 × 10^-3 m) × (1.14 × 10^-5 m)

= 8.12 × 1.14 × 10^-5 m× 10^-3 m

= 9.2568 × 10^-8 m

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Answer:

If m or n is zero, the reaction is zero order in A or B, respectively, and the rate of the reaction is not affected by the concentration of that reactant. The overall reaction order is the sum of the orders with respect to each reactant. If m = 1 and n = 1, the overall order of the reaction is second order

(m + n = 1 + 1 = 2).

Explanation:

Answer:

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

Explanation:

Answer:

What letter on the graph corresponds to both liquid water and steam? D

Explanation:

Liquid water exists between 0 and IOO degrees Celcius.

It is important for chemists to study submicroscopic matter because the behavior and properties of matter at the atomic and molecular levels directly influence the macroscopic properties and phenomena observed in the world around us.

Here are some reasons;

Understanding fundamental principles: Submicroscopic matter provides insights into the fundamental principles and laws that govern the behavior of matter. By studying atoms, molecules, and their interactions, chemists can uncover the underlying principles that explain various chemical phenomena.

Predicting and controlling macroscopic properties: The properties of macroscopic matter, such as solubility, reactivity, and physical characteristics, are determined by the arrangement, composition, and interactions of its submicroscopic components. By understanding and manipulating submicroscopic matter, chemists can predict and control macroscopic properties, leading to the development of new materials with specific characteristics or the optimization of existing materials.

Exploring chemical reactions and processes: Chemical reactions occur at the submicroscopic level, involving the rearrangement of atoms and the breaking and forming of chemical bonds. By studying submicroscopic matter, chemists can investigate reaction mechanisms, understand reaction kinetics, and develop strategies to optimize chemical processes for efficiency, selectivity, and sustainability.

Advancing technology and innovation: Many technological advancements and innovations rely on the understanding and manipulation of submicroscopic matter. Fields such as nanotechnology, molecular electronics, and materials science heavily rely on studying and engineering matter at the atomic and molecular scale to develop new technologies, devices, and materials with improved performance and functionality.

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Burning a sugar cube is a chemical change. Fire activates a chemical reaction between sugar and oxygen. The oxygen in the air reacts with the sugar and the chemical bonds are broken. Burning sugar leads to reaction of sugar with oxygen in air and leads to formation of carbon dioxide and water. The change is irreversible and is thus a chemical change

Answer:

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic

hope it is helpful to you

Answer:

solvent

Explanation:

Explanation:

We can assume that room temperature is 25 °C.

The melting point of a pure substance is the temperature at which it changes state from solid to liquid. The metling point of our substance is -187 °C. Since the room temperature is 25 °C we can say that it won't be solid. At least it will be liquid.

The boiling point of a pure substance is the temperature at which it changes state from liquid to gas. The boiling point of our substance is 42 °C. At room temperature we are under that temperature, so it won't convert into a gas. It will remain as a liquid also.

Since room temperature is between the boiling and melting point of our substance, the physical state is liquid.

Answer: liquid

The concept of energy balance refers to the equilibrium between the energy input into a system and the energy output from that system. It is based on the principle of conservation of energy, which states that energy cannot be created or destroyed but can only be transferred or transformed from one form to another.

In terms of human energy balance, it involves the energy intake from food and beverages (energy in) and the energy expenditure through basal metabolic rate, physical activity, and other bodily processes (energy out). When the energy intake matches the energy expenditure, there is an energy balance. However, when there is an imbalance, either an excess or deficit of energy, it can lead to weight gain or weight loss, respectively.

For example, if a person consumes 2000 calories (energy in) through their diet and expends 2000 calories (energy out) through their daily activities and bodily functions, they maintain an energy balance. This means that the energy intake is equal to the energy expenditure, and their weight remains stable.

On the other hand, if a person consumes 2500 calories (energy in) but only expends 2000 calories (energy out), there is a positive energy balance. The excess energy is stored in the body as fat, leading to weight gain over time.

Conversely, if a person consumes 1500 calories (energy in) but expends 2000 calories (energy out), there is a negative energy balance. The body needs to compensate for the energy deficit by utilizing stored energy reserves, such as fat, resulting in weight loss.

Support for the concept of energy balance comes from scientific studies on weight management and obesity. It has been shown that maintaining an energy balance is crucial for weight maintenance, while sustained positive or negative energy balances can lead to weight changes. Additionally, energy balance plays a role in various physiological processes, including metabolism, hormone regulation, and overall health.

By understanding and managing energy balance, individuals can make informed decisions regarding their diet, physical activity, and lifestyle to achieve and maintain a healthy weight and overall well-being.

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The true statement about Matter is that matter is anything that is made up of atoms and that has mass.

Matter is anything which is made up of mass and that has mass. and that occupies space.

If we talk about space, there is no matter because there is nothing but vacuum.

Matter is a general terms given to a group of atoms or molecules which are taken in a general.

We all are made up of atoms, because we al have mass and we all occupy some space. The same goes to anything that we can see or touch or feel that it exist.

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Answer: Matter is anything that is made of atoms and that has mass.

Explanation: I took the test.

Answer:

a. An element contains only one type of particle

Explanation:

Answer:

E

Explanation:

Only one conserving energy

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Satellite stays in orbit because of two factors velocity and gravitational pull of Earth.

Therefore, Satellite stays in orbit.

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