How many grams of magnesium chloride will be produced when 50.0 g of Mg (s) reacts according the equation shown:
Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2 (g)
50.0 g
95.2 g
196 g
2.06 g

Answer:

keeping the pressure constant and increasing the temperature..

Explanation:

To solve the problem, we can use the freezing point depression equation:

ΔT = Kf · molality

where ΔT is the change in freezing point, Kf is the freezing point depression constant, and molality is the concentration of the solution in moles of solute per kilogram of solvent.

In this case, we're looking for the freezing point of a solution of C5H4 in benzene, given that the freezing point of pure benzene is 5.50 °C, and the freezing point depression constant is 5.12 °C/m.

First, let's calculate the molality of the solution:

molality = moles of solute / kilograms of solvent

To find the moles of solute, we need to know the molar mass of C5H4. By looking it up in a periodic table, we find:

Molar mass of C5H4 = 64.09 g/mol

The problem doesn't tell us how much solute was added, but it does give us the concentration of the solution as 0.41 m (which means 0.41 moles of C5H4 per kilogram of benzene). Therefore:

molality = 0.41 moles / 0.998 kg ≈ 0.411 mol/kg

Now we can calculate the freezing point depression:

ΔT = Kf · molality

ΔT = 5.12 °C/m · 0.411 mol/kg ≈ 2.10 °C

The freezing point depression tells us how much the freezing point of the solution is lowered compared to the freezing point of pure benzene. Therefore, the freezing point of the solution is:

Freezing point = 5.50 °C - 2.10 °C = 3.40 °C

Therefore, the freezing point of the 0.41 m solution of C5H4 in benzene is 3.40 °C.

a) the degree of crystallinity of a 0.93 g/em polyethylene sample is 69.4%.

b) the density of a 72% crystalline polyethylene sample is 0.932 g/cm³.

(a) The degree of crystallinity of a 0.93 g/em polyethylene sample can be estimated by using the following formula:

Degree of crystallinity = (Density of the sample - Density of amorphous material) / (Density of the crystal - Density of amorphous material)

We know that density of amorphous polyethylene = 0.855 g/cm³, density of crystal = 0.963 g/cm³ and density of sample = 0.93 g/cm³

Substitute these values in the formula.

Degree of crystallinity = (0.93 - 0.855) / (0.963 - 0.855)= 0.075 / 0.108= 0.694 or 69.4%

(b) The density of a 72% crystalline polyethylene sample can be estimated by using the following formula:

Density of sample = Degree of crystallinity × Density of crystal + (1 - Degree of crystallinity) × Density of amorphous material

We know that the density of amorphous polyethylene = 0.855 g/cm³, density of crystal = 0.963 g/cm³ and degree of crystallinity = 72%.

Substitute these values in the formula.

Density of sample = 0.72 × 0.963 + (1 - 0.72) × 0.855= 0.69336 + 0.2394= 0.932 g/cm³

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(a) the degree of crystallinity of the polyethylene sample is 0.42 or 42%.

(b) the density of a 72% crystalline polyethylene sample is 0.94056 g/cm³.

(a) The degree of crystallinity of a 0.93 g/em polyethylene sample is calculated using the equation given below.

Problem 4.2 equation:

=+(ℎ)

The given density of amorphous polyethylene is = 0.855 g/cm³. The density of the polyethylene sample is 0.93 g/cm³. Substituting the values in the above equation, we get

0.93 = 0.855 x Crystallinity (degree of crystallinity, f) + 0.45(1 - f)

Solving the above equation, we get the degree of crystallinity of the polyethylene sample is 0.42 or 42%.

(b) The density of a 72% crystalline polyethylene sample can be calculated by the following equation:

Problem 4.2 equation:

=+(ℎ)

Let's substitute the given values of densities and degree of crystallinity in the above equation. We get:

= (0.938 g/cm³ x 0.72) + (0.855 g/cm³ x 0.28)

= 0.94056 g/cm³

Therefore, the density of a 72% crystalline polyethylene sample is 0.94056 g/cm³.

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Answer: I think d

Explanation:

i) the name for a 3 carbon atom with a carboxylic acid group attached is propanoic acid

Answer: 39 degrees farehieght

Explanation:

gooooogle

Answer:

stop cheating in mr ponte class

Explanation:

Carbohydrates have been rightly accused of being the fattening ingredient of foods therefore, we need to consume fewer starchy foods.According to the statement, it is true that carbohydrates have been rightly accused of being the fattening ingredient of foods. It's also true that to keep our weight under control, we must consume fewer starchy foods. Carbohydrates are a type of nutrient that provides energy to our bodies. They are necessary for the proper functioning of the brain, kidneys, heart, and muscles. However, some carbohydrate-rich foods, such as sugar, sweeteners, and starchy foods, such as bread, rice, and potatoes, can cause weight gain when consumed in excess. Starchy foods, in particular, can raise blood sugar levels and trigger the release of insulin, a hormone that promotes fat storage. That is why it is recommended that we consume fewer starchy foods to maintain a healthy weight. Instead, we should focus on consuming more protein and fiber-rich foods, such as lean meats, fish, vegetables, and fruits, which provide essential nutrients and help keep us full longer.

Carbohydrates are polyhydroxyaldehyde or polyhydroxyketone compounds and their derivatives in the form of simple single units or complex units. In plants, glucose is synthesized from carbon dioxide (CO2) and water (H2O) through photosynthesis and stored in the form of starch or cellulose. What are carbohydrates and what are their functions?Glucose or sugar processed from carbohydrates serves as fuel to be used by the body. The main benefit of carbohydrates is as a source of energy for the body in carrying out various functions, as well as for carrying out various activities every day.

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Answer:

This answer is 108g mass of aluminum is produced from 100g of aluminum oxide

None, it will all be lost as Carbon dioxide.

Krebs or citric acid cycle is also known as The tricarboxylic acid (TCA) cycle.

The main source of energy for cells and an important part of aerobic respiration. Aerobic respiration is the respiration occurs in the presence of oxygen.

This cycle harnesses the available chemical energy of the acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH).

TCA cycle metabolizes acetate that is derived from carbohydrates, proteins, and fats to form adenosine triphosphate (ATP) which is the body's energy currency.

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From this equation, we can see that the mole ratio of FeO to MgO is 1:1. This means that for every one mole of FeO, there is one mole of MgO involved in the reaction.

What is Mole?

In chemistry, a mole is a unit of measurement that represents an amount of substance. It is defined as the amount of a substance that contains the same number of entities (such as atoms, molecules, or ions) as there are atoms in 12 grams of carbon-12. This number is known as Avogadro's number and is approximately equal to 6.022 x 10²³ entities per mole.

The mole is used as a convenient way to express the amount of a substance in chemical reactions and calculations. For example, the stoichiometry of a chemical reaction is expressed in terms of mole ratios, which show the relative numbers of moles of reactants and products involved in the reaction. The concept of mole also allows us to convert between different units of measurement, such as grams and moles, using the molar mass of a substance.

The mole ratio of iron (II) oxide (FeO) and magnesium oxide (MgO) can be determined from the balanced chemical equation for the reaction between these two compounds. The balanced equation is:

FeO + MgO → Fe + Mg

From this equation, we can see that the mole ratio of FeO to MgO is 1:1. This means that for every one mole of FeO, there is one mole of MgO involved in the reaction.

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The volume decreases when the pressure is increased or when the temperature is decreased.

According to Charles's law, the volume of a given mass of gas is directly proportional to its absolute temperature at constant pressure. This means that, if the temperature of the given mass of gas is decreased, its volume decreases accordingly and vice versa.

According to Boyle's law, the volume of a given mass of gas is inversely proportional to its pressure. Hence, when the pressure of a gas is increased, its volume decreases accordingly.

Summarily, the volume decreases when the pressure is increased or when the temperature is decreased.

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The equilibrium constant for the system at the given temperature is 1.1×10⁻⁵

Equilibrium constant for a given is defined as the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient

For example:

eB <=> cD

The equilibrium constant for the reaction above is given as

Ke = [D]^c / [B]^e

The equilibrium constant for the reaction reaction can be obtained as follow

Ke = [NO]² / [N₂][O₂]

Ke = [1.1×10⁻⁵]² / [6.4×10⁻³][1.7×10⁻³]

Ke = 1.1×10⁻⁵

Thus, the equilibrium constant for the reaction at the given temperature is 1.1×10⁻⁵

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Complete question

See attached photo

Answer:

16 km per hour

Explanation:

I hope this helped.

If The Bond Angle Between Two Adjacent Hybrid Orbitals Is 180 Hybridization is Sp2.

A space object appears to follow an orbit as it moves around another space object. A satellite is a spacecraft that orbits the planet. A natural satellites that matches the Earth nor moon is one possibility. Moons are satellites in the orbits of numerous nations. A man-made satellite, such as the Space Stations, provides an additional choice.

The positions of the electrons are dictated by the entire molecule when several atoms unite chemically to form a molecule, combining the atomic orbitals into molecular orbitals. The molecular orbitals are occupied by the electrons of the component atoms. There are two electrons in each orbital, and their spins vary. An atom's orbital is the area of space where an electron resides.

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Answer: Its B for the Study Island assignment

Explanation:

Answer:

Ionization energy

Explanation:

Ionization energy can be defined as the energy needed to remove an electron from the outermost she'll.

Answer:

Calcium carbonate

Explanation:

Ionic compounds that tend to have one or more polyatomic ions are the ones that tend to exhibit both ionic and covalent bonding. The only one that meets this is calcium carbonate.

(i) The initial-boundary value problem for the given scenarios are as follows:

a) Scenario a:

PDE: ∂u/∂t = k * ∂²u/∂x²

Initial condition: u(x, 0) = 100 (boiling water temperature)

Boundary conditions: u(0, t) = 10, u(L, t) = 10 (constant temperature at the ends)

b) Scenario b:

PDE: ∂u/∂t = k * ∂²u/∂x²

Initial condition: u(x, 0) = 100 (boiling water temperature)

Boundary conditions: u(0, t) = 0 (temperature at x=0), ∂u/∂x(L, t) = 0 (thermal insulation at x=L)

(iii) The solution for the temperature distribution as time approaches infinity can be found by solving the appropriate steady state equation.

(i) The initial-boundary value problem formulation states the partial differential equation (PDE) governing the temperature distribution in the aluminum bar, along with the initial condition and boundary conditions.

In scenario (a), both ends of the bar are immersed in a medium with a constant temperature of 10 degrees Celsius, while in scenario (b), the end at x=0 is immersed in a medium with temperature 0 degrees Celsius and the end at x=L is insulated.

(ii) As time approaches infinity, the temperature distribution in the bar tends to reach a steady state.

In scenario (a), the temperature throughout the bar will eventually approach a constant value of 10 degrees Celsius, since both ends are immersed in a medium with that temperature.

In scenario (b), the temperature at x=0 will approach 0 degrees Celsius, while the temperature at x=L will remain constant due to thermal insulation.

(iii) To find the solution as time approaches infinity, we need to solve the appropriate steady state equation.

In scenario (a), the steady state equation is ∂²u/∂x² = 0, which implies that the temperature gradient is zero throughout the bar, resulting in a constant temperature of 10 degrees Celsius.

In scenario (b), the steady state equation is ∂²u/∂x² = 0 with the boundary condition u(0) = 0, which implies a linear temperature distribution from 0 degrees Celsius at x=0 to a constant temperature at x=L due to insulation.

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The given statement, Select true or false: the systematic name for the hydrocarbon with the following structural formula is 1-ethyl-2-methylbutane is True.

The systematic name for the hydrocarbon with the structural formula 1-ethyl-2-methylbutane is 2-methyl-1-ethylbutane. Systematic names are just one of the ways that organic chemists use to refer to molecules. Systematic names are composed of several components which each provide a piece of information about the structure of the molecule.

In this example, the components are “2-methyl”, “1-ethyl”, and “butane”. The first component, “2-methyl”, indicates that there is a methyl group attached to the second carbon from the end of the molecule, which is a branched alkyl group.

The second part, “1-ethyl”, indicates that there is an ethyl group, or a two carbon alkyl group, attached to the first carbon from the end. Finally, “butane”, indicates that the backbone of the molecule consists of four carbons. By combining these three components, the systematic name for the hydrocarbon is 2-methyl-1-ethylbutane.

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it is CO2

Explanation:

The positive sodium ions interact with the negative poles of water molecules, while the negative chloride ions interact with the positive poles.

Sodium chloride (NaCl), commonly known as table salt or simply salt, is a white crystalline chemical compound that is produced by the combination of sodium and chlorine ions in equal quantities.

Ion-dipole forces are a type of intermolecular force that occurs between an ion (charged atom or molecule) and a polar molecule.

These forces are responsible for the solvation of ions in polar solvents like water and are the driving force behind many chemical reactions that occur in solutions.

In the case of sodium chloride in water, ion-dipole forces lead to the dissolution of sodium chloride in water, forming a solution of sodium chloride in water.

Therefore, the positive sodium ions interact with the negative poles of water molecules, while the negative chloride ions interact with the positive poles.

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Answer:

There are no atoms becuase atoms are not in elements.

Explanation:

The mass percent of gold in the piece is 79.08%

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

Thus,

Mass = density × volume

Mass = density × volume

Mass of gold = 19.3 × V

Mass of gold = 19.3V

Mass = density × volume

Mass of silver = 10.5 × (1.25 - V)

Mass of silver = 13.125 - 10.5V

Mass of piece = mass of gold + mass of silver

20.5 = 19.3V + 13.125 - 10.5V

Collect like terms

19.3V - 10.5V = 20.5 - 13.125

8.8V = 7.375

Divide both sides by 8.8

V = 7.375 / 8.8

Volume of gold = 0.84 cm³

Thus,

Mass of gold = 19.3V

Mass of gold = 19.3 × 0.84

Mass of gold = 16.212 g

Mass percent of gold = (mass of gold / mass of piece) × 100

Mass percent of gold = (16.212 / 20.5) × 100

Mass percent of gold = 79.08%

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