Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction 2NH3 =N2H4 +H2

In the peroxodisulfate ion, Peroxydisulfate-, all the atoms have oxidation values that add up to +6.

Most often, the polymerization of different alkenes, such as styrene, acrylonitrile, and fluoroalkenes, is started using salts of peroxydisulfate. The homolysis of peroxydisulfate causes polymerization to begin. 2 [Peroxydisulfate] [Sulfate]

Ag: +1

Sulfur: 0

Nitrogen: +2 (in Nitric oxide)

Oxygen: -2 (in Water)

Hydrogen: +1 (in Water)

The peroxodisulfate ion, Peroxydisulfate-, consists of one disulfate (Peroxydisulfate-) group and two peroxy (Oxygen2-) groups. Normal oxygen oxidation number is 2, however in a peroxy group it is -1. The charge of the ion, which is -2, is equal to the total sum of the oxidation numbers of all the atoms in the ion. As a result, we may write:

2(-1) + 2x + 8(-2) = -2

-2 + 2x - 16 = -2

2x = 12

x = +6

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Water produced by 6.32 grams of [tex]CaCO_{3}[/tex] reacts with [tex]HCl[/tex] reaction is 0.11376 L as the density of water is 1.

[tex]CaCO_{3}[/tex]'s molar mass is equal to 100 g/mol (40 + 12 + 16 3 g/mol).

HCl's molar mass is (1 + 35.5) g/mol, or 36.5 g/mol.

Water's molecular weight is (12 + 16) g/mol, or 18 g/mol.

[tex]CaCO_{3}[/tex]initial mole number = (6.32g) / (100 g/mol) = 0.00632mol

Initial number of moles of HCl = (35.5 g/mol/36.8 g) = 1.04 mol

Mole ratio:  [tex]CaCO_{3}:HCl:CaCl_{2}:H_{2}O[/tex]= 1: 2: 1: 1. [tex]CaCO_{3}:HCl:CaCl_{2}:H_{2}O[/tex]

If [tex]CaCO_{3}[/tex] fully reacts, [tex]HCl[/tex] is required at a rate of (0.00632mol) x 2 (equals 0.01264mol <1.04 mol).

[tex]HCl[/tex] is hence abundant. As a reactant, [tex]CaCO_{3}[/tex] is the limiting one.

Total number of [tex]CaCO_{3}[/tex] reactions: 0.00632moles

No. of moles of water created / No. of moles of [tex]CaCO_{3}[/tex] reacting / 0.00632mol

0.11376 g of [tex]H_{2}O[/tex]were generated from (0.00632 mol) by (18 g/mol).

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Due to the nature of the reactants and the balanced chemical equations, the calculated solutions will be acidic, neutral, and neutral, respectively.

Neutrality is represented by 7 on the scale, which ranges from 0 to 14. pH levels below 7 signify acidity, whereas pH values over 7 suggest baseness. The pH scale is really used to determine how much free hydrogen and hydroxyl ions are present in water.

This process of neutralising acid is known as. A basic solution goes away from being basic and towards the middle of the pH scale when an acid is introduced. It is known as neutralising.

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The answer is option  (c), aluminum, as it has more valence electrons (3) than core electrons (8).

The valence electrons are the outermost electrons in an atom, while the core electrons are the inner electrons.

To determine which element has more valence electrons than core electrons, we need to look at their electron configurations, which can be found on the periodic table.

The periodic table is a tabular arrangement of the chemical elements, organized on the basis of their atomic number, electron configurations, and chemical properties. The elements are arranged in rows and columns, which are referred to as periods and groups, respectively.

The periodic table contains information about each element, including its symbol, atomic number, atomic weight, electron configuration, and chemical properties such as its reactivity, melting point, and boiling point. The elements in the same group share similar properties and chemical behaviors, while the elements in the same period have the same number of electron shells.

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To draw the two circles, we would need to draw a smaller circle with a diameter of 2,532.5 miles (representing the moon) and a larger circle with a diameter of 75,974.4 miles (representing the Earth) that is 30 times larger than the smaller circle.

If we assume that the larger circle represents the Earth, then the diameter of the Earth would be 30 times the diameter of the smaller circle representing the moon. Let's say that the diameter of the smaller circle is x. Then the diameter of the larger circle (Earth) would be 30 times x or 30x.

To find the correct distance from Earth to the moon at this scale, we need to know the actual distance from Earth to the moon, which is approximately 238,855 miles or 384,400 kilometers. If we divide this distance by the scale factor of 30, we get:

238,855 miles / 30 = 7,961.8 miles

Therefore, the diameter of the smaller circle (moon) would be approximately 7,961.8 miles / π = 2,532.5 miles (rounded to one decimal place). And the diameter of the larger circle (Earth) would be 30 times that or 75,974.4 miles

So, to draw the two circles, we would need to draw a smaller circle with a diameter of 2,532.5 miles (representing the moon) and a larger circle with a diameter of 75,974.4 miles (representing the Earth) that is 30 times larger than the smaller circle.

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Percent yield = 1566%, The percent yield is greater than 100%, which means that the student obtained more product than the theoretical yield.

The theoretical yield is the maximum amount of product that could be produced in a chemical reaction, based on stoichiometric calculations. The actual yield is the amount of product that is actually obtained from the reaction in a laboratory experiment.

To calculate the percent yield of the experiment, we need to compare the actual yield to the theoretical yield.

The balanced chemical equation for the formation of alum from aluminum and potassium hydroxide is:

2 Al + 2 KOH + 4 H₂O + 1/2 O₂ → KAl(SO₄)₂·12H₂O

From this equation, we can see that the mole ratio of aluminum to alum is 2:1. This means that for every 2 moles of aluminum used, we should theoretically obtain 1 mole of alum.

First, we need to convert the mass of aluminum foil used to moles of aluminum:

0.0432 g Al × 1 mol Al/26.98 g Al = 0.001600 mol Al

Next, we can use the mole ratio to calculate the theoretical yield of alum:

Theoretical yield = 0.001600 mol Al × 1 mol KAl(SO₄)₂·12H₂O/2 mol Al × 474.39 g KAl(SO₄)₂·12H₂O/1 mol KAl(SO₄)₂·12H₂O

= 0.0382 g KAl(SO₄)₂·12H₂O

Now we can calculate the percent yield:

Percent yield = actual yield/theoretical yield × 100%

Actual yield = 0.5987 g

Percent yield = 0.5987 g/0.0382 g × 100% = 1566%

The percent yield is greater than 100%, which means that the student obtained more product than the theoretical yield. This could be due to experimental error, such as incomplete drying of the crystals or loss of product during the experiment. It's also possible that the student accidentally used more aluminum foil than intended.

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Answer:

Explanation:

dilute solutions of hydrochloric acid (HCl), sulphuric acid (H₂SO₄), and nitric acid (HNO₃) react with active metals to produce a salt and hydrogen gas.

Active metals react strongly and quickly with other elements and compounds due to the electrons in its structure and its ease of sharing the electrons with other elements.

The most active metals are found in Groups 1  and 2 of the Periodic Table (i.e. the left side), and include lithium, potassium, magnesium, and calcium. Metals such as aluminium, lead, and zinc, are less active than magnesium or calcium, but are generally still labelled as 'active'. Metals such as copper, gold, or silver are inactive and will not react.

Therefore, in the provided question, all the metals listed, except for copper, will produce a metal salt + hydrochloric acid. Copper will not react.

In general:

A compound formed between two or more non-metal elements that share electrons is called a covalent compound or a molecular compound.

In covalent compounds, the atoms share electrons in order to achieve a full outer shell of electrons and become more stable. Covalent compounds typically have low melting and boiling points, are often gases or liquids at room temperature, and are poor conductors of electricity. Examples of covalent compounds include water (H2O), carbon dioxide (CO2), and methane [CH4].

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Answer:

The answer is B: 0.0025 M

According to molar concentration and dilution concept, the  [H₃O+] in the final solution is closest to 0.05 M.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.In case of 2 solutions concentrated and diluted it is calculated as, M₁V₁=M₂V₂ substitution gives M₂=0.25×100/500=0.05

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A 5-kg object experiences the greatest gravitational force at sea level. The correct option is D.

The term force has a particular definition in science. At this standard, it is perfectly acceptable to refer to a force as both a push and maybe a pull. A force is not one that an object possesses or possesses. Another object applies a force to another. The concept of a force is not restricted to living or non-living things.

What exactly is balanced force?

Balance occurs when the forces applied have similar strengths & act in opposite directions. These forces cancel each other out, and the movements of the object on which they act remain unchanged. The correct option is D.

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I think it is Ba since the radius increases along the group.but decreases along the period

Answer:

Ba

Explanation:

Ba

The seasons are a result of Earth's axis tilt. Diverse regions of Earth experience the Sun's strongest rays at various times of the year. The Northern Hemisphere experiences summer as a result of the North Pole's tilt towards the Sun. Winter also occurs in the Northern Hemisphere when the South Pole tilts towards the Sun.

The Sun rises in the east (far arrow), rises in the south (to the right) while travelling to the right, culminates in the west (close arrow), and sets in the east. In midsummer and midwinter, respectively, both the rising and set positions are moved to the north. The direction of south in the Southern Hemisphere is to the left.

In order to change our seasons, the Earth's 23.5 degree tilt is crucial.

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A typical serving of the juice would provide about 29.8 milligrammes of vitamin C.

Subtract the total amount of iodine drops from the quantity of drops required to produce 1 mg of vitamin C in the reference sample. For instance, if your reference sample needed 2 drops for every 1 mg of vitamin C and your test fruit needed 10 drops of iodine, the equation would be Per ounce of fruit juice, there are 5 mg of vitamin C (10/2=10).

We need to know the volume of a normal serving in order to determine the quantity of vitamin C in the juice. Let's presume that a serving size is 250 mL.

5.45 mg / 45.7 mL = x mg / 250 mL

5.45 mg * 250 mL = 45.7 mL * x

1362.5 mg/mL = 45.7 mL * x

x = 1362.5 mg / 45.7

x = 29.8 mg

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Answer:

140.3 *C

Explanation:

(P1 * V1) / T1 = (P2 * V2) / T2

where P1 = 3.000 atm, V1 = 200.0 ml, T1 = 37.0°C + 273.15 = 310.15 K, P2 = 2.000 atm, V2 = 400.0 ml.

Substituting these values into the formula gives:

(3.000 atm * 200.0 ml) / 310.15 K = (2.000 atm * 400.0 ml) / T2

Solving for T2 gives:

T2 = (2.000 atm * 400.0 ml * 310.15 K) / (3.000 atm * 200.0 ml)

T2 ≈ 413 K or 140°C.

Therefore, the standard enthalpy change for reaction (3) is -152.6 kJ.

To determine the standard enthalpy change for reaction (3), we can use Hess's law, which states that the overall enthalpy change for a reaction is the sum of the enthalpy changes for each step of the reaction.

We can see that reaction (1) has the same products as reaction (3) but in reverse order. We can use reaction (1) to reverse the formation of FeO:

2Fe(s) + O2(g) → 2FeO(s) ΔH° = -544.0 kJ

2FeO(s) → 2Fe(s) + O2(g) ΔH° = +544.0 kJ (reversed)

We can also use reaction (2) to form ZnO, which is a product in reaction (3):

2Zn(s) + O2(g) → 2ZnO(s) ΔH° = -696.6 kJ

Now, we can add the two reactions to get the overall reaction (3):

2FeO(s) + 2Zn(s) → 2Fe(s) + 2ZnO(s)

We add the enthalpies of the two reactions to get the enthalpy change for reaction (3):

ΔH° = (+544.0 kJ) + (-696.6 kJ)

ΔH° = -152.6 kJ

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I think it is 2,4-dimethylpentane

The following statements accurately describe matter:

Matter is made up of tiny particles called atoms.

Atoms cannot be divided and still retain the properties of their original state.

What is Atom?

An atom is the basic unit of matter, consisting of a nucleus composed of protons and neutrons, surrounded by electrons in electron shells or energy levels. Atoms are the building blocks of all matter and are the smallest unit of an element that retains the chemical properties of that element.

The statement "Atoms cannot be divided and still retain the properties of their original state" refers to the concept of the indivisibility of atoms, as proposed by John Dalton in the early 19th century. According to Dalton's atomic theory, atoms are considered to be the smallest unit of matter that retains the properties of an element. In other words, atoms are considered to be indivisible and cannot be further broken down into smaller particles without losing their characteristic properties.

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The moles of ammonium fluoride initially added in this experiment was 0.0216 moles.

Mole is a unit of measurement that is used in chemistry to measure the amount of a substance. It is a very important unit of measurement because it allows chemists to accurately measure the amount of a substance that is being used in a reaction. The mole is defined as the amount of a substance that contains the same number of particles as there are atoms in 12 grams of carbon-12..

First, we need to calculate the moles of calcium nitrate in the solution. We can do this by using the molarity and volume of the solution:
(4.61x10⁻¹ M)*(4.479x10¹ mL) = 0.0216 moles of calcium nitrate
(0.731 g)*(1 mol/55.847 g) = 0.0131 moles of calcium fluoride
(0.0216 moles)*(1 mol/1 mol)
= 0.0216 moles of ammonium fluoride
Therefore, the moles of ammonium fluoride initially added in this experiment was 0.0216 moles.

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Answer:

Explanation:4-etil-3,6-dimetil-7-(1-metilpropil) dekanın açık formülü şu şekildedir:

CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH(CH3)-CH2-CH(CH3)2

Under the given circumstances, the pressure difference between methane and an ideal gas is 58.5 atm.

An ideal gas is a theoretical gas composed of a large number of small particles that have zero volume, do not interact with each other, and are in constant random motion. The behavior of an ideal gas is described by the ideal gas law, which relates the pressure, volume, temperature, and number of moles of the gas.

The van der Waals equation can be used to figure out the pressure difference between methane and an ideal gas under these circumstances:

(P + a n² / V²)(V - n b) = n R T

where P is the pressure, n is the number of moles, V is the volume, T is the temperature in Kelvin, R is the ideal gas constant (0.08206 L·atm/K·mol), a and b are the van der Waals constants for methane.

First, we can calculate the pressure of an ideal gas under these conditions using the ideal gas law:

P = n R T / V

P = (15.0 mol) (0.08206 L·atm/K·mol) (293.45 K) / (6.00 L)

P = 299.8 atm

Next, we can use the van der Waals equation to calculate the pressure of methane under these conditions:

(P + a n² / V²)(V - n b) = n R T

(P + (2.300 L²·atm/mol²) (15.0 mol)² / (6.00 L)²) ((6.00 L) - (15.0 mol) (0.0430 L/mol)) = (15.0 mol) (0.08206 L·atm/K·mol) (293.45 K)

Simplifying the equation gives:

P + 1.319 atm = 359.6 atm

P = 358.3 atm

As a result, under these circumstances, the pressure difference between methane and an ideal gas is:

ΔP = P (methane) - P (ideal gas) = 358.3 atm - 299.8 atm = 58.5 atm.

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Answer:

Explanation:

Ρ=6.17g/L

m=20*6.17

m=123.4g

n=m/M

n=123.4 mol/138

n= 0.89mol

a. This reaction is endothermic because energy is absorbed during the reaction.

b. ΔH = +187 kJ

c. The balanced chemical equation for the decomposition of calcium carbonate is:

CaCO3(s) → CO2(g) + CaO(s)

d. We can use the molar mass of calcium carbonate to convert 21.0 g of CaCO3 to moles:

21.0 g CaCO3 x (1 mol CaCO3 / 100.09 g CaCO3) = 0.210 mol CaCO3

From the balanced equation, we can see that the molar ratio of CaCO3 to ΔH is 1:1. Therefore, the energy absorbed can be calculated as:

0.210 mol CaCO3 x 187 kJ/mol = 39.3 kJ

Therefore, 39.3 kJ of energy is absorbed during the decomposition of 21.0 g of calcium carbonate.

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0.02314 moles of  NO₂ can be formed from the decomposition of 1.25 g of dinitrogen pentoxide.

The balanced equation for the decomposition of dinitrogen pentoxide is:

2 N₂O₅ → 4 NO₂ + O₂

The molar mass of N₂O₅  is 108.01 g/mol.

To determine the number of moles of N₂O₅  present in 1.25 g, we use the following calculation:

moles N₂O₅  = mass / molar mass

moles N₂O₅ = 1.25 g / 108.01 g/mol

moles N₂O₅ = 0.01157 mol

From the balanced equation, we can see that 2 moles of N₂O₅  decompose to form 4 moles of NO2. Therefore, the number of moles of NO2 produced can be calculated as:

moles  NO₂ = (0.01157 mol N2O5) × (4 mol NO2 / 2 mol N2O5)

moles  NO₂ = 0.02314 mol

Therefore, 0.02314 moles of  NO₂ can be formed from the decomposition of 1.25 g of dinitrogen pentoxide.

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Answer:

o

Mass number

Atomic number

Number of electrons

Proton number

Explanation:

As a result, aluminium (Al) and 7.37 litres of hydrochloric acid (HCl) can react to produce 225.46 moles of hydrogen gas (H2).

As a result, when 8 moles of aluminium are entirely consumed during the process of dissolving it in HCl solution, 12 moles of hydrogen gas are created.

The chemical reaction between aluminium (Al) and hydrochloric acid (HCl) has the following balanced chemical equation:

[tex]3 H2 + 2 AlCl3 = 2 HCl + 2 Al[/tex]

According to the equation, 2 moles of HCl result in 3 moles of H2. In order to determine the amount of H2 generated, we must first determine how many moles of HCl are contained in 7.37 litres of acid.

The following formula can be used to determine the quantity of HCl:

Volume in litres times concentration in moles per litre equals moles.

Since the HCl concentration is not specified in the inquiry, we are unable to immediately calculate the moles. However, we may convert the volume in litres to the mass in grams using the density of HCl, and then use the molar mass of HCl to calculate the number of moles.

At standard circumstances (0 °C and 1 abm), HCl has a density of roughly 1.49 g/mL. As a result, 7.37 litres of HCl have the following mass:

Density equals mass, therefore 7.37 L times 1.49 g/mL equals 10.9763 kg.

Since HCl has a molar mass of about 36.46 g/mol, there are the following moles of HCl:

[tex]10.9763 kg / 36.46 g/mol = 300.61 mol is the formula for moles of HCl.[/tex]

Now, we can determine the number of moles of H2 created using the mole ratio from the balanced equation: moles of[tex]H2 = (moles of HCl / 2) x (3/2) = (300.61 mol / 2) x (3/2) = 225.46 mol[/tex]

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Answer: Oxygen (??)

Explanation: Im not sure but smth like H2O (my brain is not braining T-T)

105.7 moles of gas would be present in the Martian atmosphere sample.

The diameter of Mars is around half that of Earth, and its atmosphere is significantly thinner, having a volume less than 1% of Earth's. The Earth's atmosphere is primarily nitrogen- and oxygen-rich, whereas the atmosphere is primarily carbon dioxide-based.

PV = nRT

T = 27°C + 273.15 = 300.15 K

Next, we can solve for n:

n = PV/RT

The pressure is given as 8.0 mm Hg, which we need to convert to atm:

1 atm = 760 mm Hg

So:

P = 8.0 mm Hg / 760 mm Hg/atm = 0.0105 atm

The gas constant is:

R = 0.08206 L·atm/K·mol

So:

n = (0.0105 atm)(22. m3)/(0.08206 L·atm/K·mol)(300.15 K) = 105.7 mol

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The mass of diphosphorus pentoxide produced is: 549.47 g

What is mass?

Mass is a measure of the amount of matter in an object. It is typically measured in units of grams (g) or kilograms (kg). Mass is a scalar quantity and is different from weight, which is the force exerted on an object due to gravity and depends on both the mass of the object and the acceleration due to gravity.

The balanced chemical equation for the reaction between phosphorus and oxygen to produce diphosphorus pentoxide is:

[tex]4P[/tex] + [tex]5O_{2}[/tex] → [tex]2P_{4}O_{10}[/tex]

To solve the problem, we need to first calculate the amount of phosphorus required to react with 38.76 grams of oxygen. Since phosphorus is in excess, the amount of diphosphorus pentoxide produced will be limited by the amount of oxygen.

The molar mass of oxygen is 15.999 g/mol. Therefore, the number of moles of oxygen in 38.76 grams is:

38.76 g / 15.999 g/mol = 2.422 mol

According to the balanced equation, 5 moles of oxygen react with 4 moles of phosphorus to produce 2 moles of diphosphorus pentoxide. Therefore, the number of moles of phosphorus required is:

4/5 × 2.422 mol = 1.9376 mol

The molar mass of diphosphorus pentoxide is 283.886 g/mol. Therefore, the mass of diphosphorus pentoxide produced is:

1.9376 mol × 283.886 g/mol = 549.47 g

Rounding to the hundredths of a gram, the answer is:

549.47 g → 549.47

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Answer: 239/94Pu → 239/95Am + 0/-1e

Explanation: The present chemical transformation involves the conversion of a neutron residing in the nucleus of the element Plutonium-239 to a proton, accompanied by the release of an electron by beta decay. The subatomic particle known as the proton remains confined within the atomic nucleus, thereby triggering a metamorphosis of the constituent element, resulting in the creation of Am-239. Meanwhile, the emission of a beta particle occurs from the nucleus.