You are given 100 grams of some unknown pure substance. You are told that that sample contains 0. 4892767658 mol of this substance. What is the substance? (Show work)

The chemicals shown represent molecules of compounds that are formed from the reaction between molecules and atoms of elements.

Chemical compounds are substances composed of two or more different elements that are chemically bonded together in a fixed ratio.

Chemical compounds can be classified into various categories, such as organic compounds (which contain carbon), inorganic compounds (which do not contain carbon), and biochemical compounds (which are involved in biological processes).

Examples of chemical compounds are NaCl, MgO, etc.

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The potassium permanganate is an inorganic compound with the chemical formula KMnO₄. Its IUPAC name is given as potassium manganate (VII). The  substance which forms propanoic acid is but-1-ene. The correct option is A.

The oxidation is defined as the process which involves the addition of oxygen or removal of hydrogen. The reaction of potassium manganate (VII) with an alkene is an oxidation reaction.

The acidified potassium manganate (VII) solution oxidizes the alkene by breaking the 'C'-'C' double bond and replacing it with 'C'-'O' double bonds.

The reaction of but-1-ene in presence of potassium manganate (VII) is:

CH₃CH₂CH = CH₂ → CH₃CH₂COOH + CO₂

Thus the correct option is A.

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Explanation:

Refer to pic...........

If 500 g if magnesium chloride are created, the reaction described above would result in 8.23 grams of hydrogen gas.

To prevent and cure low levels of magnesium inside the blood, this drug is a mineral supplement. The symptoms of having too much stomach acid, such as indigestion, heartburn, and stomach discomfort, are also treated with some brands.

Molar masses of MgCl2 are calculated as follows: moles od MgCl2 = mass of MgCl2 / (24.31 g/mol Plus 2(35.45 g/mol))

Moles of MgCl2 are equal to 4.07 mol, and the mass of H2 is equal to 4.07 mol times the molar mass of H2, or 2.02 g/mol, for a total mass of 8.23 g.

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The PDH complex is composed of five different enzymes and three different cofactors.

The PDH complex is located in the mitochondrial matrix

The PDH complex links the metabolic pathways of glycolysis and the citric acid cycle.

The correct options are a, b and c.

PDH is made up of five separate enzymes and three different cofactors. These enzymes and cofactors collaborate to convert pyruvate into acetyl-CoA, a molecule capable of entering the citric acid cycle.

The PDH complex is found in the mitochondrial matrix, which is the mitochondria's innermost compartment. Here is also where the citric acid cycle occurs.

The PDH complex connects the glycolysis and citric acid cycle metabolic processes. Glycolysis converts glucose to pyruvate, which the PDH complex subsequently converts to acetyl-CoA. The citric acid cycle then uses acetyl-CoA to create energy in the form of ATP.

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The probable question may be:

Identify the statements that accurately describe the structure of the pyruvate dehydrogenase (pdh) complex. Select all that apply.

a) The PDH complex is composed of five different enzymes and three different cofactors.

b) The PDH complex is located in the mitochondrial matrix

c) The PDH complex links the metabolic pathways of glycolysis and the citric acid cycle.

The frequency of a FM radio station is 96.3 MHz.The wavelength of the FM radio station is approximately 3.11 meters.

What is wavelength ?

The formula to calculate the wavelength of a wave is:

wavelength = speed of light / frequency

where the speed of light is approximately 3.00 × 10^8 meters per second.

Using this formula, we can calculate the wavelength of the FM radio station:

wavelength = 3.00 × 10^8 / 96.3 × 10^6

wavelength = 3.11 meters

Therefore, the wavelength of the FM radio station is approximately 3.11 meters. Answer: 3.11 m.

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Answer:

答えはコバルト88

Explanation:

colbalt-60 は colbaly88 によって知られていたため

During every action, there's an opposite and equal response, states Newton's third rule of motion. The goalie experiences a force of 20 N in return from the puck. The best choice is A.

That term "force" has a specific meaning in science. At this point, describing a force as being pushed or pulled is perfectly appropriate. It is not possible for a force to "be in it" and "be held by" a thing.

Force is indeed a physical factor that alters or has the potential to alter an object's state of rest and motion as well as its form. Newton is the SI unit of force.

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The Complete Question :

If the goalkeeper exerts a 20 N force on the puck, what force does the puck exert on the goalkeeper?

A. The puck exerts an equal force of 20 N back on the goalkeeper.

B. The puck exerts a force less than 20 N.

C. The puck exerts a force greater than 20 N.

To determine the total magnification of the microscope as you are the power of the eye piece by the power of the objective lens.

Magnification of a microscope refers to the degree of enlargement of an object or specimen viewed through the microscope. It is expressed as a numerical value and represents the ratio of the size of the image seen through the microscope to the size of the actual object.

The total magnification of a microscope is calculated by multiplying the magnification of the objective lens by the magnification of the eyepiece. The magnification of the objective lens is determined by the lens itself and is usually marked on the lens, whereas the magnification of the eyepiece is typically 10x.

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Answer: 0.5 moles of aluminum oxide can be produced from 24 grams of oxygen gas.

Explanation:

balanced chemical equation for the reaction between aluminum and oxygen is:

4Al + 3O2 → 2Al2O3

moles of O2 = mass / molar mass = 24 g / 32 g/mol = 0.75 mol

moles of Al2O3 = (2/3) * moles of O2 = (2/3) * 0.75 mol = 0.5 mol

Therefore, 0.5 moles of aluminum oxide can be produced from 24 grams of oxygen gas.

It is easier to break the N-H bond and the N-O bond than it is to break the N₂ bond as the triple bond is the strongest bond as compared to the single bond.

The Bond length reduces as the bond strength will increases, the single bonds will breaks more quickly than the double and the triple bonds. The triple bond has the stronger bond strength and the shorter bond lengths than the single and the double bonds.

Thus, it is easier to the the N-H bond and the N-O bond as compared to the  N₂ bond or the N ≡ N.

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The acceleration of an object is directly proportional to the net force acting on it, as per Newton's second law of motion.

To determine the resultant force causing the given acceleration, we need to use the formula F = ma, where F is the net force, m is the mass of the object, and a is the acceleration.

In this case, the given mass of the object is 8 kg, and the acceleration is 5 m/s². Substituting these values in the formula, we get:

F = ma F = 8 kg x 5 m/s²F = 40 N

Therefore, the resultant force acting on the object is 40 N. This means that there is a net force of 40 N acting on the object, which is causing it to accelerate at a rate of 5 m/s².  

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If the student measures the density of the aluminum as 2. 87 g/mL and the actual value is the 2.69 g/mL,  the student's % error is 6.6 %.

The measures density of the aluminum  = 2.87 g/mL

The actual density of the aluminum = 2.69 g/mL

The expression of the percent error is as follows :

% error = (|actual value - measured value | / actual value ) × 100 %

% error = (|2.87 - 2.69 | / 2.69 ) × 100 %

% error = 0.066 × 100 %

% error  = 6.6 %

Thus, the percent error is 6.6 %.

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According to the molar concentration, if you  have 550 ml of 7 M solution HCI and you want to make 3 L of diluted solution,the new concentration will be 1.28 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 case of two solutions it is calculated as, M₁V₁=M₂V₂ on substitution gives M₂=7×550/3000=1.28 M.

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Answer:

For example, when magnesium reacts with oxygen to form magnesium oxide, the magnesium atom loses two electrons to form the Mg2+ cation, which has electronic configuration 2,8. The oxygen atom gains these electrons to form the O2– anion, with electronic configuration 2,8.

According to the given data, by using formula q = mCΔT, the heat released is approximately 34,534.68 J.

Heat is the interchange of "thermal" energy caused by a temperature difference. Think about an isolated system with two subsystems that are originally operating at two different temperatures. Energy is moved from the subsystem 2 with a greater temperature to the subsystem 1 with a lower temperature.The energy that results to the movement of molecules and atoms in a material is known as thermal energy, also known as heat. These particles get hotter as they travel more quickly. The thermal energy of the ground is known as geothermal energy. Energy that is held in motion is called motion energy.

Using the given formula:

Q = (451 g)(4.18 J/(g·°C)(18 degrees)

Q = (451 g) x (4.18 J/(g·°C)) x (18°C)

Q = 34,534.68 J

Therefore, the heat released is approximately 34,534.68 J.

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Answer:

1. P4 + 6Cl2 → 4PCI3; already balanced

2. 25.5 moles Cl2

Explanation:

1. The chemical equation for the reaction of phosphorus with chlorine gas to produce phosphorus trichloride is:

P4 + 6Cl2 → 4PCI3

The equation is already balanced

2. The equation shows that 6 moles of chlorine gas are required to produce 4 moles of phosphorus trichloride.

set up a proportion:

6 moles Cl2 / 4 moles PCI3 = x moles Cl2 / 17 moles PCI3

solve for x:

x = (6 moles Cl2 / 4 moles PCI3) x 17 moles PCI3

x = 25.5 moles Cl2

Therefore, 25.5 moles of chlorine gas are required to produce 17 moles of phosphorus trichloride.

Answer:

25.5 moles of Cl₂ required

Explanation:

2P + 3Cl₂ --> 2PCl₃

Since, the stoichiometry (molar ratio) of the reaction is 2 : 3 : 2,

thus, number of moles of Cl₂ = 3/2 × number of moles of PCl₃

∴ number of moles of Cl₂ required is 25.5 moles

Answer:

Excess lemon juice: 162.25 - 92.54 = 69.71

Excess water: 910.08 - 169.55 = 740.53

Explanation:

Excess reactant #2: Water

158.32 x 1/215 x 2/2 x 230.25 = 169.55 g water

Excess lemon juice: 162.25 - 92.54 = 69.71

Excess water: 910.08 - 169.55 = 740.53

The mass of 2.75 moles of CO2 is approximately 121.03 grams.

To calculate the mass of 2.75 moles of CO2, we need to use the molar mass of CO2.

The molar mass of CO2 is approximately 44.01 g/mol (12.01 g/mol for carbon + 2x 16.00 g/mol for oxygen).

To calculate the mass of 2.75 moles of CO2, we can use the following formula:

mass = moles x molar mass

Substituting the given values, we get:

mass = 2.75 moles x 44.01 g/mol

mass = 121.0275 g

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O₂ is the limiting reagent and C₂H₄ is in excess.

The percent yield is 92.8%

To determine the limiting reagent, we need to compare the amounts of reactants and products using stoichiometry. The balanced equation for the reaction between C₂H₄ and O₂ to produce CO₂ and H₂O is:

C₂H₄ + 3 O₂ → 2 CO₂ + 2 H₂O

From the given data, we can calculate the number of moles of each reactant:

moles of C₂H₄ = 170.9 g / 28.05 g/mol = 6.089 mol

moles of O₂ = 52.75 L * (1 mol / 22.4 L) = 2.357 mol

moles of CO₂ produced = 64.1 g / 44.01 g/mol = 1.456 mol

Now we can use the stoichiometric coefficients from the balanced equation to determine which reactant is limiting:

For every 1 mole of C₂H₄, we need 3 moles of O₂ to produce 2 moles of CO₂.

The moles of O₂ available (2.357 mol) are less than what is required (3 × 6.089 mol = 18.267 mol) if all the C₂H₄ reacts, so O₂ is the limiting reagent.

Therefore, O₂ is the limiting reagent and C₂H₄ is in excess.

To calculate the theoretical yield of CO₂, we use the amount of limiting reagent:

moles of CO₂ produced = 2.357 mol O₂ × (2 mol CO₂ / 3 mol O₂) = 1.571 mol CO₂

theoretical yield of CO₂ = 1.571 mol × 44.01 g/mol = 69.12 g CO₂

The percent yield of the reaction can be calculated by dividing the actual yield (64.1 g) by the theoretical yield (69.12 g) and multiplying by 100:

percent yield = (64.1 g / 69.12 g) × 100% = 92.8%

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One method of obtaining these nutrients from the shrub is through the branches of the Dodder plant penetrating the tissues of the shrub. This is an illustration of a partnership in which only one creature benefits.

Tissue is a collection of cells with a common structure and function that work as a single unit. The brain give it shape and help it retain heat and energy. ibrocartilage, epithelial tissue, muscle tissue, and nervous tissue are the four different types of tissues.

Your organism is made up of cells, and tissues are created when groupings of cells carry out similar tasks. Your body consists mostly of four different tissue types: connective, epithelial, muscular, and nervous tissue. Organs are cushioned and joined together by connective tissue. The skin's outer layer is made up of epithelial tissue.

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Answer:

The mass of iron sulphide formed is 14.2 g

Explanation:

Starting off with a balanced chemical equation:

2Fe + 3S --> Fe₂S₃

to find the mass of Fe₂S₃ and thus the limiting reagent, we can first find the number of moles of each reactant. Number of moles is found by dividing mass by molar mass (found using a standard IUPAC Periodic Table).

n(Fe) present = m/M = 7.62/55.85 = 0.13644 mol

n(S) present = m/M = 8.67/32.07 = 0.27035 mol.

Using the values for the number of moles of each reactant, we can find the limiting reagent by testing each with the molar ratio of the equation.

If (Fe) is the limiting reagent, then moles of sulphur required = n(Fe)/2 × 3

= 0.20466 mol. Since we have excess of what's required of sulphur, then iron could be the limiting reagent.

Now we test it with (S). If (S) is the limiting reagent, then moles of iron required = n(S)/3 × 2 = 0.18023 mol. Since we have less than what is required, therefore, sulphur is NOT the limiting reagent.

Hence, Iron is the limiting reagent.

Now we have the limiting reagent, we can use this to calculate the number of moles of Fe₂S₃, since the limiting reagent is the reactant that is completely consumed.

Since stoichiometry of Fe : Fe₂S₃ = 2 : 1, therefore:

moles of (Fe) = 2× moles of (Fe₂S₃).

hence, moles of (Fe₂S₃) = 1/2 × 0.13644 mol = 0.06822.

Finally, we can multiply the moles of iron sulphide by the molar mass, to get the mass.

m(Fe₂S₃) = nM = 0.06822 × (55.85×2 + 32.07×3) = 14.2 g (3 significant figures, since all the data in the question is in 3 sig. figs).

Answer:

chemical reaction: substances are converted to one or more different substances

reactant: A chemical substance that is present at the start of a chemical reaction and changes.

product: a substance that is present at the end of a chemical reaction.

Precipitate: an insoluble solid that emerges from a liquid solution

Law of conservation of mass: a discovery that mass is neither created nor destroyed in chemical reactions.

Explanation:

Each trophic level represents a transfer of energy, with only about 10% of the energy being transferred from one level to the next.

What is Energy ?

Energy is a fundamental concept in physics and refers to the ability of a system to perform work. It is a property of objects and substances that can be transferred to other objects or converted into different forms, but it cannot be created or destroyed. There are different forms of energy, such as kinetic energy (the energy of motion), potential energy (the energy stored in an object due to its position or shape), thermal energy (the energy associated with the temperature of an object), electrical energy (the energy associated with the movement of charged particles), and many others. Energy plays a crucial role in many natural processes and is essential for life and human activities.

Higher amounts of energy flow through trophic levels, which are known as food chains. In a food chain, energy is transferred from one organism to another as they eat each other. The first trophic level consists of primary producers, such as plants, which convert solar energy into chemical energy through photosynthesis. The second trophic level consists of herbivores, which consume the primary producers. The third trophic level consists of carnivores, which consume the herbivores.

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Explanation:

Refer to pic above.........

The amount of iron (III) hydroxide that can be produced by the reaction of 75.0 mL of 0.105 M iron (III) nitrate with 125 mL of 0.150 M sodium hydroxide is 0.841 g.

This problem can be solved using stoichiometry. The balanced reaction is: Fe(NO₃)₃ + 3 NaOH -> Fe(OH)₃ + 3 NaNO₃. This tells us that one mole of iron (III) nitrate reacts with three moles of sodium hydroxide to produce one mole of iron (III) hydroxide.

First, we need to convert the volumes of the solutions to moles using their molarities. So, for iron (III) nitrate: (0.105 moles/L) x (0.075 L) = 0.007875 moles, and for sodium hydroxide: (0.150 moles/L) x (0.125 L) = 0.01875 moles.

Iron (III) nitrate and sodium hydroxide react in a 1:3 ratio. Here, sodium hydroxide is in excess and iron (III) nitrate is the limiting reagent, as (0.01875 moles)/(3) > 0.007875 moles. So, the amount of iron (III) hydroxide formed will be equal to the amount of iron (III) nitrate used.

The molar mass of iron (III) hydroxide is 106.87 g/mol. Therefore, the mass of iron (III) hydroxide precipitate is: (0.007875 moles) x (106.87 g/mol) = 0.841 g.

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Answer:

V = 0.0506 m^3

Explanation:

PV = nRT

V = (nRT) / P

V = (2.19 mol * 8.31 J/(mol·K) * 294.15 K) / 100000 Pa

The molar mass of phosphorus trichloride is 137.33 g/mol. 28.7 g of chloride gas corresponds to 0.20882 mol.

Mol is an abbreviation for molarity, which is a measure of concentration in a solution. It is expressed as amount of solute (in moles) per litre of solution. Molarity is used to describe the strength of an acid or base, the concentration of a substance in a solution, and the amount of a given substance in a given volume of solution. Molarity is also used in the context of dilution, where a solution of known molarity is used to make a solution of a desired molarity. In this case, the number of moles of solute per litre of solution is used as a measure of dilution.

Therefore, 28.7 g of chloride gas reacts with excess phosphorus to form 0.20882 mol of phosphorus trichloride, or 28.20 g of phosphorus trichloride.

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The mixture's final temperature is roughly 293.67 K. At this temperature, all of the components in the combination have an equal distribution of the heat energy present in the system.

The temperature that a mixture of two or more substances will achieve once they have been blended and given time to reach thermal equilibrium is known as the "final temperature". At this temperature, all of the components in the combination have an equal distribution of the heat energy present in the system. The principles of thermodynamics, such as the conservation of energy and the specific heat capacities of the constituent substances, can be used to compute the final temperature. For designing heating and cooling systems, processing materials, and studying chemical reactions, among other scientific and engineering applications, the end temperature is a crucial element to consider. Solving for :

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The correct answer is

a. It is inversely proportional to the temperature of the gas.

What is Mass?

Mass is a fundamental physical property of matter that determines the weight and force of an object in a gravitational field. It is the amount of matter in an object, and is typically measured in units such as kilograms or grams. The mass of an object is constant and does not change with location, while weight can vary depending on the gravitational force at a given location. Mass is also a measure of the inertia of an object, which is its resistance to a change in motion.

This question relates to the gas laws, specifically the relationship between pressure, volume, temperature, and number of moles of a gas. According to Boyle's Law, when the number of moles of a gas is held constant, pressure and volume are inversely proportional to each other.

However, the question states that volume and number of moles are held constant, so this relationship doesn't apply. Instead, we need to consider Charles's Law, which states that at constant pressure and number of moles, the volume of a gas is directly proportional to its temperature.

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To determine the number of moles of the gaseous organic compound, we can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to convert the density to mass per volume. The density of the gas is given as 340g/L. Therefore, the mass of 1 L of the gas is 340 g.

Next, we need to use the ideal gas law to calculate the number of moles. We know that the pressure is 1.7 atm, the temperature is 45°C (which is 318 K), and the volume can be calculated using the density and the molar mass of the compound. The molar mass can be determined from the molecular formula of the compound.

Assuming the compound is a hydrocarbon, we can use an average molar mass of 28. Thus, the volume of 1 mole of the gas can be calculated as follows:

V = (molar mass/density) × 1000 ml/L = (28/340) × 1000 = 82.35 ml/mol

Using the ideal gas law equation and plugging in the given values, we get:

n = (PV) / (RT) = (1.7 atm × 82.35 ml) / (0.0821 L atm/mol K ×318 K) = 0.839 mol

Therefore, the number of moles of the gaseous organic compound is 0.839 mol

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