A 8952 g of water was completely melted. Calculate the amount of heat absorbed in this
process.

Answer:

The answer would be a line graph because it is used to track changes over time.

The equilibrium constant for the reaction is K = 7.802 × 10³

Equilibrium constant for a chemical reaction is the ratio of the amount of reactants to the amount of products.

Since we are given the reactions

2SO₃(g) → 2SO₂(g) + O₂(g) Kc = 2.3 × 10⁻⁷ (1)

2NO₃(g) → 2NO₂(g) + O₂(g) Kc = 1.4 × 10⁻³ (2)

With given equilibrium constants,

And, we require the equilibrium constant for the reaction

SO₂(g) + NO₃(g) → SO₃(g) + NO₂(g)  (3)

We generate reaction (3) from reactions (1) and (2)

Reversing reaction (1), we have

2SO₂(g) + O₂(g) → 2SO₃(g)  (4). K' = 1/Kc = 1/2.3 × 10⁻⁷

Adding equations, (2) and (4), we have

2SO₂(g) + O₂(g) → 2SO₃(g)  (4).

+

2NO₃(g) → 2NO₂(g) + O₂(g) (2)

2SO₂(g) + 2NO₃(g) + O₂(g) → 2SO₃(g) + 2NO₂(g) + O₂(g)

SO₂(g) + NO₃(g) → SO₃(g) + NO₂(g)  (3)

The equilibrium constant for equation (3) is

K = [SO₃][NO₂]/[SO₂][NO₃]

The equilibrium constant for equation (4) is

K' = [SO₃]²/[SO₂]²[O₂]

The equilibrium constant for equation (2) is

K" = [NO₂]²[O₂]/[NO₃]²

So, [SO₃]²/[SO₂]²[O₂] ×  [NO₂]²[O₂]/[NO₃]² = K' × K"

= [SO₃]²[NO₂]/²[SO₂]²[NO₃]²

= K²

⇒ K² = K' × K"

K = √(K' × K")

K' = 1/2.3 × 10⁻⁷ and K" = 1.4 × 10⁻³

Substituting the values of the variables into the equation, we have

K = √(K' × K")

K = √(1/2.3 × 10⁻⁷ × 1.4 × 10⁻³)

K = √(1.4 × 10⁻³/2.3 × 10⁻⁷)

K = √(0.6087 × 10⁴)

K = 0.7802 × 10⁴

K = 7.802 × 10³

So, the equilibrium constant for the reaction is K = 7.802 × 10³

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Total, 127.8 moles of the steam (water vapor) will be produced.

Iron(III) nitrate nonahydrate, or Fe(NO₃)₃·9H₂O, is a compound that contains iron (III) cations (Fe³⁺) and nitrate anions (NO₃⁻) combined with nine water molecules (H₂O) per formula unit. The nine water molecules are referred to as "nonahydrate," which indicates that there are nine water molecules associated with each formula unit of Fe(NO₃)₃. This compound is also commonly known as ferric nitrate nonahydrate.

Balanced equation for the given reaction is;

Fe(NO₃)₃·9H₂O(s) → Fe(NO₃)₃(s) + 9H₂O(g)

According to the equation, one mole of Fe(NO₃)₃·9H₂O produces 9 moles of water vapor (H₂O) when it undergoes the reaction. Therefore, if there are initially 14.2 moles of Fe(NO₃)₃·9H₂O, the number of moles of water vapor (H₂O) produced will be;

14.2 moles of Fe(NO₃)₃·9H₂O × 9 moles of H₂O per 1 mole of Fe(NO₃)₃·9H₂O = 127.8 moles of H₂O

Therefore, 127.8 moles of water vapor will be produced.

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Answer:

The answer is B

Explanation:

Neap tides are a type of to tie occuring after spring tides. It occurs when moon and sun are at the right angles to each other. It produce low tidal ranges. Hence, phrase B is correct.

Tides are a geographical phenomenon taking place due to the gravitational pull by sun and moon on the ocean of earth. They are long period waves causing the ocean back and forth to the cost.

During new moons larger tides appears in earth and they are called spring tides. Spring tides occurs twice in a lunar month. During spring tides, moon appears full and earth is between sun and moon.

After seven days of spring tide, lower tides are produced when the moo and sun comes in right angle to each other. They are called the neap tides producing lower range of tidal waves . During this time moon will be half full thus for the first and last quarter of the moon. Hence, the option B neap tide produce low tidal ranges is correct.

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Answer:

38 and [Kr] 5s2.

Explanation:

The number of electrons and the electronic configurations are the same for the three isotopes of Strontium because in isotopes number of neutron increases not number of proton or electron. Isotope of element having the same atomic number but with different atomic masses due to increase the number of neutrons in each isotope. So the number of electron in all isotopes are the same i.e. 38 and the electronic configuration is also the same i.e. [Kr] 5s2.

Answer:

1. frequency = 7.39 * 10¹⁴ Hz

2. wavelength = 1.44 * 10⁸ nm

Explanation:

The speed, frequency and wavelength of waves are related by the formula;

speed = wavelength * frequency

1. wavelength of light = 406 nm = 4.06 * 10⁻⁷ m

speed of light is a constant = 3.0 * 10⁸ m/s

From the formula above, frequency = speed / wavelength

therefore, frequency = (3.0 * 10⁸ m/s) / 4.06 * 10⁻⁷ m

frequency = 7.39 * 10¹⁴ Hz

2. From the equation above, wavelength = speed/frequency

speed of radiation = 3.0 * 10⁸ m/s

frequency = 2.09 * 10⁹ Hz or 2.09 * 10⁹ s⁻¹

therefore, wavelength = (3.0 * 10⁸ m/s) / 2.09 * 10⁹ s⁻¹

wavelength = 1.44 * 10⁸ nm

Since most reactions take place in solutions, it's critical to comprehend how the substance's concentration is expressed in a solution. The number of chemicals in a solution can be stated in a variety of ways. The grams of acetic acid is 611.90 g.

The number of moles of dissolved solute per liter of solution is the definition of molarity, a unit of concentration. Molarity is defined as the number of millimoles per milliliter of the solution by dividing the number of moles and the volume by 1000.

The equation which is used to calculate the molarity of two different solutions is:

M₁V₁ = M₂V₂

M₁ = M₂V₂ / V₁

0.300 × 18.53 / 10.00 = 0.55 M

Number of moles = Molarity × volume

n = 0.55 × 18.53 = 10.19

Mass = n × Molar mass = 10.19 × 60.05 = 611.90 g

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Answer:

A. Decrease in temperature

Explanation:

The statement indicates an endothermic chemical reaction is "Decrease in temperature".

Endothermic reactions generate products by absorbing heat energy from the environment.

The temperature of the reaction mixture rises as energy is released in an exothermic process. The temperature drops when energy is absorbed in an endothermic reaction. A thermometer can be used to monitor temperature changes in the reaction mixture.

An endothermic reaction happens when the temperature of an isolated system drops while the temperature of its surroundings rises. The overall heat of reaction in endothermic reactions is positive (q > 0).

Hence the correct option is A.

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Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

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Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?

To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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The oxidation state of nitrogen (N) in NaNO3 is +5. option B

To determine the oxidation state of nitrogen (N) in sodium nitrate (NaNO3), we need to assign oxidation numbers to each element in the compound.

In NaNO3, we know that the sodium ion (Na+) has a +1 oxidation state because it is an alkali metal. Oxygen (O) typically has an oxidation state of -2 in compounds, and there are three oxygen atoms in NaNO3. Since the compound is neutral, the sum of the oxidation states must be zero.

Let's assume that the oxidation state of nitrogen is x. Therefore, we can set up the equation:

(+1) + x + (-2) * 3 = 0

Simplifying the equation:

+1 + x - 6 = 0

x - 5 = 0

x = +5

Therefore, the oxidation state of nitrogen (N) in NaNO3 is +5.

The oxidation state of an element indicates the number of electrons it has gained or lost in a compound. In this case, the nitrogen atom in NaNO3 has gained five electrons to achieve a stable oxidation state of +5.

It is important to note that oxidation states are formal charges and do not necessarily represent the actual distribution of electrons in a compound. They are assigned based on a set of rules and can be useful in understanding the reactivity and behavior of elements in chemical reactions.

Option B

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The molar mass of the polystyrene is  41750 g/mol.

We know that the molar mass is the mass of one mole of the substance. We need to obtain the concentration of the solution in order to obtain the molar mass.

Number of moles = 2.05 /M moles

Volume of the solution = 100 mL or 0.1 L

Concentration = 2.05 /M/0.1  or 2.05/0.1 M

π = iCRT

π = Osmotic pressure

i = Van't Hoff factor

C = concentration

R = gas constant

T = temperature

0.012 = 1 *  2.05/0.1 M * 0.082 * 298

0.012 = 50.1/0.1 M

0.012 * 0.1 M = 50.1

M = 50.1/0.012 * 0.1

M = 41750 g/mol

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The moles of the ammonia that is produced is 3.33 moles.

Stoichiometry is an important tool in chemical analysis, and it is used in a wide range of industries, including pharmaceuticals, materials science, and environmental science.

The balanced reaction equation in this case can be given as;

\(N_{2} (g)+3H_{2} (g)--- > 2NH_{3} (g)\)

If 3 moles of hydrogen produces 2 moles of ammonia

5 moles of hydrogen will produce 5 * 2/3

= 3.33 moles

Thus we have 3.33 moles of ammonia.

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Answer:

A) energy stored by atoms

Explanation:

Chemical potential energy is the energy stored by atoms. This energy form can be converted to other forms of energy.

Answer:

so I can do it tomorrow

Explanation:

3(+7-(#679''78()

wag nyo na po pansinin yung nasa taas bwahahahaha

Answer:

Explanation:

Based on the scenario being described it seems that this is due to the later ionization energies, namely the 2nd, 3rd etc... seem to be much higher than the first. Therefore this causes an excess amount of energy to be used in order to remove the electrons, thus causing less energy to be left after the process is over. This would be the best explanation for this behavior.

1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

26.62 grams of HBr would be present in 355 mL of a 7.5% m/v HBr solution.

Concentration refers to the amount of a substance in a defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution.

There are various methods of expressing the concentration of a solution.

Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution.

Solutions of known concentration can be prepared either by dissolving a known mass of solute in a solvent and diluting to a desired final volume or by diluting the appropriate volume of a more concentrated solution (a stock solution) to the desired final volume.

Given,

HBr = 7.5% m/ v

This means 7.5g of HBr in 100 ml of the solution.

1 ml of the solution has 0.075g

355 ml of the solution will have = 0.075 × 355 = 26.62g of HBr

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According to Lowry-Bronsted concept, for dissolution of HCl in water , H₂O acts as  a Lowry-Bronsted base as it accepts proton from HCl.

According to Lowry-Bronsted concept, acid can be defined as a substance which donates a proton and forms its conjugate base while base is a substance which accepts a proton and forms its conjugate acid.

Conjugate base which is formed from acid accepts a proton and acid is reformed, while conjugate acid which is generated from base donates a proton and base is regenerated.

The theory involves the transfer of protons between an acid and a base.They are also classified depending on their ability to donate and accept protons .Strong Lowry-Bronsted acid and bases are those which loose and accept protons easily while weak Lowry-Bronsted acids and bases are those which do not loose and accept protons readily.

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Answer:

B. The cells.

call

Cells are considered the basic units of life in part because they come in discrete and easily recognizable packages. That's because all cells are surrounded by a structure called the cell membrane — which, much like the walls of a house, serves as a clear boundary between the cell's internal and external environments.

According to the concept of solubility, isopropanol is miscible with water and hence there is one layer that is formed when water and isopropanol are  mixed.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer:

See explaination

Explanation:

please kindly see attachment for the step by step solution of the given problem

i When sodium carbonate (Na2CO3) is mixed with an aqueous solution of copper(II) sulfate (CuSO4), the student can expect to see several evidence of a chemical reaction:

Formation of a solid precipitate: When these two solutions are mixed, a solid precipitate of copper(II) carbonate (CuCO3) will form. This is a sign that a chemical reaction has occurred.

Change in color: The reaction between sodium carbonate and copper(II) sulfate will also result in a change in color. The solution may turn a blue or green color, indicating the presence of copper(II) ions.

Release of gases: The reaction between sodium carbonate and copper(II) sulfate may also produce gases, such as carbon dioxide (CO2).

ii The balanced chemical equation for the reaction between sodium carbonate and copper(II) sulfate is:

2Na2CO3(aq) + CuSO4(aq) → 2Na2SO4(aq) + CuCO3(s)

iii This is a double displacement reaction, also known as a metathesis reaction. In this type of reaction, the cations (positively charged ions) and anions (negatively charged ions) of the reactant compounds exchange places to form the products. In this case, the sodium ions (Na+) and the copper ions (Cu2+) exchange places to form sodium sulfate (Na2SO4) and copper carbonate (CuCO3).

Answer:

Explanation: K+ has a higher ionisation energy than Ca+ , so K has a higher second ionisation energy than Ca .

Answer:

chemical symbol

Explanation: