When ammonium is added to water the temperature of the water decreases. Ammonium nitrates can be recovered by evaporating the water added Which explains those observations A the ammonium nitrates dissolved in water and process is endothermic B the ammonium nitrate reacts with the water and process is endothermic C the ammonium nitrates dissolved in water and process is exothermic D the ammonium nitrate reacts with the water and process is exothermic

Answer:

Hey mate....

Explanation:

This is ur answer......

Heat transfer by radiation occurs when microwaves, infrared radiation, visible light, or another form of electromagnetic radiation is emitted or absorbed. An obvious example is the warming of the Earth by the Sun. A less obvious example is thermal radiation from the human body.

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If a person with type A blood (AO) is crossed with a person with type B blood (BO), the correct genotype percentage is 25% AB, 25% BO 25%AO, and 25% OO while the phenotypes are 25% A, 25% B, 25% AB and 25% O.

A punnet square in genetics is a useful diagram to estimate the phenotypes in offspring, in this case we have

      A    O

B   AB  BO

O  AO  OO

Therefore, with this data, we can see that the punnet square can be used to estimate phenotypes and thus determine the proportion of offspring.

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Answer:

the answer is 47.9 and ik because I just had that question

The empirical formula of the compound is O₄Pb₃.

An Empirical system is the chemical system of a compound that offers the proportions of the elements gifted within the compound however not the real numbers or arrangement of atoms. This would be the lowest complete variety ratio of the elements within the compound.

Amount of lead (Pb) = 90.6%

⇒and amount of oxygen = 9.4%

taking the whole number ratio

o = 4

Pb = 3

∴ ⇒O: Pb=4:3

O4Pb3 answer.

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Answer:

Explanation:

Enzyme activity is affected by the increase in temperature.

enzyme activity is also affected by the change in ph.

enzyme activity is also affected when substrate concentration is not increased in a chemical reaction.

Based on your observations, enzyme activity is affected by the increase in temperature.Enzyme activity is also affected by the change in pH.

Observations are defined as a set of statements or facts which are recorded while conducting an experiment.Observations are made through sensing changes in the variables of the experiment.

It is specifically defined as an act of knowing or recording the changes in the variables of the experiment.Recording observations holds importance as recording observations avoid the experiment to be repeated over and over again.

It is important to note down observations so that the testing of hypothesis is made easier.There are four types of observations .Observations need to be descriptive and must be written in complete sentences and should include all the numerical data of the experiment.

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The gravitational force is related to the distance between two objects because it is inversely proportional to the square of the distance.

The gravitational force refers to the attraction between two different objects due to their masses.

This force (gravitational force)  is fundamental for maintaining the distance of objects in the Universe.

In conclusion, the gravitational force is related to the distance between two objects because it is inversely proportional to the square of the distance.

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The calculated molar ratio of iron to oxygen in BIFs is 1.452.

Comparing this ratio to the molar ratios of Hematite (1:0.75) and Magnetite (1:0.67), we can see that the calculated value of 1.452 is closest to the Hematite molar ratio of 1:0.75. Therefore, Hematite is the more dominant iron component in BIFs.

To calculate the mass of oxygen contained within BIFs, we'll use the given information:

Total mass of the modern atmosphere = 5.01×10¹⁸ kg

Percentage of oxygen in the modern atmosphere = 21%

Mass of oxygen contained within the modern atmosphere = (5.01×10¹⁸ kg) × (0.21) = 1.051×10¹⁸ kg

Percentage of oxygen contained in BIFs = 6.6% (given)

Mass of oxygen contained within BIFs = (6.6% of 1.051×10¹⁸ kg) = 6.6/100 × 1.051×10¹⁸ kg = 6.9166×10¹⁶ kg

Therefore, the mass of oxygen contained within BIFs is 6.9166 × 10¹⁶ kg.

To calculate the number of moles of oxygen contained within BIFs, we'll use the molecular mass of O₂:

Molecular mass of O₂ = 0.032 kg/mole

Number of moles of oxygen contained within BIFs = (Mass of oxygen in BIFs) / (Molecular mass of O₂)

= (6.9166×10¹⁶ kg) / (0.032 kg/mole) = 2.1614375 × 10¹⁸ moles

Therefore, the number of moles of oxygen contained within BIFs is 2.1614375 × 10¹⁸ moles.

Next, let's calculate the mass of iron in BIFs:

Total mass of BIFs = 5.0×10¹⁷ kg

Percentage of iron in BIFs = 35%

Mass of iron contained within BIFs = (35% of 5.0×10¹⁷ kg) = 35/100 × 5.0×10¹⁷ kg = 1.75×10¹⁷ kg

To calculate the number of moles of iron contained within BIFs, we'll use the atomic mass of iron:

Atomic mass of iron = 0.0558 kg/mole

Number of moles of iron contained within BIFs = (Mass of iron in BIFs) / (Atomic mass of iron)

= (1.75×10¹⁷ kg) / (0.0558 kg/mole) = 3.1367419 × 10¹⁸ moles

Therefore, the number of moles of iron contained within BIFs is 3.1367419 × 10¹⁸ moles.

Finally, let's calculate the molar ratio of iron to oxygen in BIFs:

Molar ratio of iron to oxygen = (Number of moles of iron) / (Number of moles of oxygen)

= (3.1367419 × 10¹⁸ moles) / (2.1614375 × 10¹⁸ moles)

≈ 1.452

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Answer:

You may be saving someone from a rock slide, where the rocks will fall at any time, before they fall they have potential energy.

The one way that potential energy might be involved in rescue team missions to save someone to fall is potential energy is used to hold one.

Gravity is the interaction that is because of the force of energy between the surface of the earth to the mass or any energy present on the earth's surface and the force becomes double with the weight.

The potential energy is a form of energy that is used against gravity to do the work which required energy and in rescue, the energy is needed in every coss to save one.

Therefore, one way that potential energy might be involved in rescue team missions to save someone to fall is because gravitational potential energy is used to hold one.

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Answer:

d) Earth is more massive than Pluto.

Explanation:

The force of gravity is greater for an object orbiting the Earth than for the same object orbiting Pluto, because Earth is more massive than Pluto.

The common factor is that the greater the planet's mass, the greater its gravitational force acting on an object. Hence, the option (d) is the correct answer.

The second hydroxylation of vitamin D occurs primarily in the kidneys.

Vitamin D undergoes a two-step hydroxylation process to become its active form, 1,25-dihydroxy vitamin D (calcitriol). The first hydroxylation occurs in the liver, where vitamin D is converted to 25-hydroxy vitamin D (calcidiol). This is the major circulating form of vitamin D in the bloodstream.

After the initial hydroxylation in the liver, the second hydroxylation takes place primarily in the kidneys. Here, the enzyme 1-alpha-hydroxylase acts on 25-hydroxy vitamin D, converting it into the biologically active form, 1,25-dihydroxy vitamin D (calcitriol). This active form of vitamin D plays a crucial role in regulating calcium and phosphate metabolism, bone health, and overall immune function.

It is worth noting that certain other tissues and organs, such as the skin, intestines, and immune cells, also possess the capability to carry out the second hydroxylation to a lesser extent. However, the kidneys are the primary site for this conversion, contributing to the majority of the circulating active vitamin D in the body.

Overall, the second hydroxylation of vitamin D primarily occurs in the kidneys, where 25-hydroxy vitamin D is converted to 1,25-dihydroxy vitamin D, the biologically active form of vitamin D.

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A reaction between an acid and a base describes a neutralization reaction. Therefore, option (a) is correct.

A neutralization reaction can be described as a chemical reaction in which an acid and base react with each other to produce salt and water.

The acidic strength of the reactant gives the pH of the neutralized solution. When a strong acid solution will react with a strong base the formed salt can be neither acidic nor basic, it will be neutral. For example, when HCl (a strong acid) reacts with NaOH (a strong base), the resulting salt is sodium chloride (NaCl) and water.

HCl    +    NaOH   →   NaCl   +   H₂O

When a strong acid solution will react with a weak base, then the formed salt will be acidic in nature. When a strong base solution will react with a weak acid then the formed salt will be basic in nature and decides the pH level of the solution.

Therefore, the reaction between the acid and base can best describe a neutralization reaction.

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Answer:

3.731424735730523

Explanation:

Answer:

No.

Explanation:

The equilibrium amounts relatively do not change depending on the reaction, whether you started with 8 moles of NO2 or 4 moles of NO2.  

Isoelectronic species have the same number of electrons. To determine which option is isoelectronic with S^2-, let's first find the number of electrons in S^2-. Sulfur (S) has 16 electrons in its neutral state. With a 2- charge, it gains 2 extra electrons, making it have 18 electrons.

Now, let's compare the given options:

a. Ar (Argon) has 18 electrons in its neutral state, so it is isoelectronic with S^2-.

b. Ca2+ (Calcium ion) has 20 electrons in its neutral state. With a 2+ charge, it loses 2 electrons, making it have 18 electrons. Thus, it is isoelectronic with S^2-.

c. Al3+ (Aluminum ion) has 13 electrons in its neutral state. With a 3+ charge, it loses 3 electrons, making it have 10 electrons. It is not isoelectronic with S^2-.

d. K (Potassium) has 19 electrons in its neutral state. It is not isoelectronic with S^2-.

So, the species isoelectronic with S^2- are a. Ar and b. Ca2+.

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The reaction is second order, which means that the rate of the reaction is dependent on the concentration of N₂O₅ raised to the power of 2. Therefore, the rate law for the reaction is: c) rate = k[N₂O₅]²


The rate law is a mathematical expression that describes how the rate of a reaction is influenced by the concentrations of the reactants. In this case, the reaction is second order, which means that the rate is proportional to the square of the concentration of N₂O₅.

By observing the balanced equation, we can see that for every 2 moles of N₂O₅, 4 moles of NO₂ and 1 mole of O₂ are produced. This indicates that the rate of the reaction is directly proportional to the square of the concentration of N₂O₅.

Therefore, the rate law for the decomposition of N₂O₅ is c) rate = k[N₂O₅]², where k is the rate constant.

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Answer:

No they are not identical.

Explanation:

They are not identical because there are many ranges of states that the electrons could have.

I hope it helps! Have a great day!

Muffin ^^

Answer:

No.

Explanation:

It could vary so it wouldn’t be identical.

I hope it helps! Have a great day!

bren~

Exergonic: Reactions with negative delta G°’ values are exergonic reactions that release free energy.Exergonic means that the reaction will occur spontaneously. The value of delta G°’ is less than zero.

Endergonic: When the delta G°’ value is positive, the reaction is endergonic. These are reactions that need to be powered by an external force to occur.

At equilibrium: When delta G°’ = 0, the reaction is at equilibrium. The forward and reverse reactions occur at the same rate, and the concentrations of reactants and products do not change. Thus, the reaction is at equilibrium.

Here is how the K’eq values should be matched with the appropriate delta G°’ values:

K'eq  a. 1 : 0kJ/mol  b. 10⁻⁵ : 22.84 kJ/mol c. 10⁴ : -28.53 kJ/mol  d. 10² : -5.69 kJ/mol  e. 10⁻¹ : 11.42 kJ/mol AG°' (kJ/mol)

Therefore, the correct match for K’eq values with the appropriate delta G°’ values are as follows:

K'eq = 10⁴ corresponds to delta G°’ = -28.53 kJ/mol, which is exergonic.

K'eq = 10⁻⁵ corresponds to delta G°’ = 22.84 kJ/mol, which is endergonic.

K'eq = 10² corresponds to delta G°’ = -5.69 kJ/mol, which is exergonic.

K'eq = 1 corresponds to delta G°’ = 0 kJ/mol, which is at equilibrium.

K'eq = 10⁻¹ corresponds to delta G°’ = 11.42 kJ/mol, which is endergonic.

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Answer:

1 g  +  10 g

Explanation:

Answer:

there are a thousand grams in a kilo

Answer:

they must do a background check

Explanation:

they need to check the liscence and do a small interrigaition

The air pollution that forms primarily from car exhaust in the presence of sunlight is called photochemical smog.

Photochemical smog is a type of air pollution that is formed when pollutants, particularly nitrogen oxides (NOₓ) and volatile organic compounds (VOCs) emitted from car exhaust and industrial emissions, react in the presence of sunlight. It is characterized by the presence of a brownish haze and the formation of various secondary pollutants, such as ozone (O₃) and peroxyacyl nitrates (PANs).

The formation of photochemical smog involves complex chemical reactions. Sunlight provides the energy needed to drive these reactions, which can lead to the production of highly reactive compounds like ozone. These reactions typically occur in urban areas with high traffic and industrial activity, where emissions from vehicles and other sources are abundant.

Photochemical smog is known to have detrimental effects on human health and the environment. It can contribute to respiratory problems, eye irritation, and the formation of ground-level ozone, which is harmful to both human health and vegetation. To mitigate photochemical smog, efforts are made to reduce emissions from vehicles, control industrial pollution, and implement air quality regulations.

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Answer:

1 atm = 101.325 kPa

Therefore, 204 atm = 204 * 101.325 = 20670.3 kPa

Rounded to three significant figures, the pressure of 204 atm is 2.07 x 10^4 kPa.

Answer:

A temperature inversion occurs when air near the ground is relatively cool, and there is a layer of warmer air above it. That upper layer of warm air keeps the cooler air from rising, and traps all of the pollution in the cooler, lower layer.

Explanation:

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Answer:

The letters are a one- or two-letter symbol assigned to each element.

Explanation:

Scientists were hesitant to support wegener and hess when they first presented their hypotheses just because of the conflict of stability of the continents and the ocean floor.

Scientists were hesitant to support Wegener and Hess when they first presented their hypotheses because their ideas went against the widely accepted scientific understanding of the time. Wegener's theory of continental drift, which proposed that the continents had once been part of a single landmass and had since moved apart, was not supported by any credible evidence or mechanism. Hess's theory of sea floor spreading, which proposed that new oceanic crust was being created at mid-ocean ridges and pushed away from them, was also not supported by any conclusive evidence. Additionally, both hypotheses conflicted with the prevailing belief in the permanence and stability of the continents and the ocean floor. These factors made it difficult for scientists to accept their ideas, despite the growing evidence in support of them.

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Answer: contributes to greenhouse gasses, can kill plants and animals when breathed in

Explanation:

The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Answer:

ammonia molecules. Similar factors may be derived for any pair of substances in any chemical equation. Example 4.8. Moles of Reactant Required in a Reaction.

Explanation:

The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution

The pH of a solution of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride can be calculated using the following equation:

Kb = [CH3)3N][H2O] / [(CH3)3NH+][OH-]

where Kb is the base dissociation constant of trimethylamine, (CH3)3N. Using the relationship that Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C), the OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09. When a solution is introduced to water, it can either react with the water to form acid or base.

The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution. The pH of the solution can be calculated using the pH formula, which is: pH = -log [H+], where [H+] is the concentration of hydrogen ions in the solution. The given solution is composed of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride. Trimethylamine is a weak base and trimethylammonium chloride is its corresponding conjugate acid. When a weak base is added to water, it undergoes a reaction with water to produce hydroxide ions and a conjugate acid.

The base dissociation constant of trimethylamine, Kb is used to find the OH- ion concentration of the solution. The relationship between Kb and Ka is given by Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C).The OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09.

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Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in Gibbs free energy or chemical potential.

The final temperature of a 10.0 g piece of iron initially at 25°C, if supplied with 9.5 J from a stove, is 27.11°C. The change in temperature of the iron is 2.11°C.

We can use the formula:

Q = mcΔT

where Q is the heat absorbed by the iron, m is the mass of the iron, c is the specific heat capacity of iron, and ΔT is the change in temperature.

In this case, the heat absorbed by the iron is 9.5 J, the mass of the iron is 10.0 g, the specific heat capacity of iron is 0.450 J g^(-1) °C^(-1), and the initial temperature is 25°C. We want to find the final temperature.

Let's rearrange the formula to solve for ΔT:

ΔT = Q / mc

Substituting the given values, we get:

ΔT = (9.5 J) / (10.0 g x 0.450 J g^(-1) °C^(-1))

ΔT = 2.11 °C

Therefore, the change in temperature of the iron is 2.11°C.

To find the final temperature, we add the change in temperature to the initial temperature:

T_final = T_initial + ΔT

T_final = 25°C + 2.11°C

T_final = 27.11°C

Therefore, the final temperature of the iron is 27.11°C.

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