At 25 Degrees Celsius, Delta G degree f is -620 kj/mol for SiCl4(g) and -592 kj/mol ofr MgCl2(s). Calculate Delta G Degree for the reaction,
SiCl4 (g) + 2 Mg(s) → 2MgCl2 (s) + Si(s)
and determine if the reaction is pontaneous at 25 degrees celsius if the pressure of SiCl4(g) is 1 atm.
A. Delta G degree = -564 kj; the process is spontaneous
B. Delta G degree = +565 kj; the process in nonspontaneous
C. Delta G degree = -28.0 kj; the process is spontaneous
D. Delta G degree = +28.0 kj; the process is nonspontaneous

Answer:

It is Soluble

Explanation:

Name- Magnesium acetate

It dissolves easily in water and alcohol.

According to the question, helium atoms are there in the sample is (3.05 J/P) / (R × (105 + 273.15 K)) × 6.02 x 10²³ atoms/mol.

Helium atoms are the second most abundant type of atom in the universe. They are the simplest of all atoms, consisting of only two protons and two neutrons. Helium atoms are extremely lightweight, with an atomic weight of only four, making them the second lightest element after hydrogen.

The number of helium atoms in the sample can be calculated using the ideal gas law: n = PV/RT

where n is the number of moles, P is the pressure, V is the volume, R is the ideal gas constant, and T is the temperature.

Since the process is adiabatic and quasistatic, the pressure and volume of the sample can be determined from the work done on the piston:

W = P(V2 - V1)

where W is the work done, V2 is the final volume, and V1 is the initial volume.

Since the work done is 3.05 J, the final volume is 3.05 J/P. The initial volume can be determined from the ideal gas law, using the initial temperature of 105°C and the number of moles (which is unknown).

n = PV1/RT1

where n is the number of moles, P is the pressure, V1 is the initial volume, R is the ideal gas constant, and T1 is the initial temperature.

Substituting the values into the ideal gas law, we can solve for the number of moles: n = (3.05 J/P) / (R × (105 + 273.15 K))

Once the number of moles is determined, the number of helium atoms can be calculated by multiplying by Avogadro's number.

N = n × 6.02 x 10²³ atoms/mol

Therefore, the number of helium atoms in the sample is:

N = (3.05 J/P) / (R × (105 + 273.15 K)) × 6.02 x 10²³ atoms/mol.

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Answer:

The mass of a body is a measure of its inertial property or how much matter it contains. The weight of a body is a measure of the force exerted on it by gravity or the force needed to support it. ... The SI unit of mass is the kilogram (kg)

Answer: first option

Explanation:

Answer: the bowl

Explanation:took the test

Answer:

n = Initial volume/22.4L

Explanation:

The molar concept is simply one that is used to find the Number of moles and explain the relationship it has with avogadro's number, molecular mass, molar mass e.t.c.

Now, in terms of molar mass, number of moles is given by the formula;

n = mass of the sample/molar mass

In terms of avogadro's number, number of moles is;

1 mole = avogadro's number = 6.02 × 10^(23)

Now, when dealing with ideal gases, the molar volume of an ideal gas is 22.4 L.

Now the relationship between this volume and the mole concept is that the number of moles is gotten by dividing the initial volume by this molar volume.

Thus;

n = Initial volume/22.4L

Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

The  molarity of the Solution is 6.9M . Molarity is inversly proportional to the temperature.

Molarity is amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is known as the molar concentration of a solution.

Molarity = no. Of moles / Volume  

The S I unit of Molarity is M .

Weight of KCl is 4

molar mass of the KCl is 58g/ mol .

Volume of the solution is 10 ml

 .           → 10/ 1000 L

no of moles =4/58

Molarity  = 4×1000/ 58×10

Molarity =6.9 M

Molarity is inversly proportional to the temperature, so when Molarity increase temperature decrease or vice versa .

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To calculate the pH of a solution, we can use the formula:

pH = -log[H3O+]

where [H3O+] is the concentration of hydronium ions in the solution.

Substituting the given value of [H3O+] into the formula, we get:

pH = -log(8.5 x 10^-5) = 4.07

Therefore, the pH of the solution is approximately 4.07.

Answer:

Autotrophs have the ability to synthesize their own food from the substances surrounding them. Examples of this are photosynthesis or chemical energy. Heterotrophs cannot synthesize their own food. They have to get their nutrition from other animals or plants.

In shorter terms, autotrophs are plants. Heterotrophs are humans.

Explanation:

Answer:

C

Explanation:

Photosynthesis is use of light(photo---solar energy) to make(synthesize) food(chemical energy) and is done by producers(plant)

Answer:

Explanation:Metalloids may act either like metals or nonmetals in chemical reactions. Most metalloids have some physical properties of metals and some physical properties of nonmetals. They fall between metals and nonmetals in their ability to conduct heat and electricity. They are shiny like metals but brittle like nonmetals.

Answer:

Three formula units, Two Ammonium radical and Sulphate radical

Explanation:

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Answer:

3Mg(OH)2 + 2H3PO4 = Mg3(PO4)2 + 2H3O

Explanation:

Question:

Which lists the numbers of each atom the other half of the equation would contain?

Equation:

3Mg(OH)2 + 2H3PO4

Options:

Answer:

A) 3 Mg, 2 P, 14 O, 12 H

Explanation:

I just did the test on edge 2020 and got the answer right. Also, my dog said hi.

Answer:

they were facing the oppisite ways

Explanation:

Answer:

43.5

Explanation:

there are 43.5 moles of N2

Answer: 15.7 L Fe

Explanation:

\((\frac{4.23*10^{23} molecules Fe }{1} )*(\frac{22.4L Fe}{6.023*10^{23}molecules Fe } )= 15.7 L Fe\)

Basic mole conversion

The volume of 4.23 × 10²³  molecules of Fe is equal to 15.734 L.

Avogadro’s number can be represented as the number of entities in one mole of any substance. Generally, these entities can be molecules, electrons, protons, atoms, or ions, depending upon the chemical reaction or reactant and product.

The value of Avogadro’s number is approximately equal to 6.022× 10²³ mol⁻¹. We know that at STP the volume of any gas or substance is equal to 22.4 liters.

Given, the number of molecules of the Fe =  4.23 × 10²³

The volume of the one mole of Fe = 22.4 L

So 6.022 × 10²³ molecules of Fe have mass = 22.4 L

Then 4.23 × 10²³ Fe molecules will have the volume:

= 4.23 × 10²³ ×22.4/6.022× 10²³

= 15.734 L

Therefore, the volume of 4.23 × 10²³  molecules of Fe is 15.734 liters.

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You can determine if the group belongs to the groups you already studied by comparing the boiling and melting point of the new elements with the ones you already know.

Elements are grouped in the periodic table based on specific properties. These properties include the boiling and the melting point.

Moreover, these properties are often constant which means every element has a specific boiling and melting point and you can identify elements based on this.

According to the above, you need to compare the boiling and melting point given ( −185°C and -190°C) to the ones you previously studied. In this situation, there are two possibilities:

Note: This question is incomplete because the elements of the previous activity are not given; due to this, I answered based on previous knowledge.

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Answer:

Martin Luther King, Jr. worked hard to bring greater equality to America and ensure civil rights for all people, regardless of race.

The molar solubility of Li3PO4 in a 1M LiCl solution is 2.37 x 10^-4 M. To calculate the molar solubility of Li3PO4 in a 1M LiCl solution, we need to use the common ion effect.

This effect occurs when a salt that contains an ion in common with the solute is added to the solution, which reduces the solubility of the solute. In this case, the common ion is Li+ from LiCl. We can use the Ksp equation for Li3PO4 and the equilibrium expression for LiCl to solve for the molar solubility of Li3PO4.

Ksp = [Li+]^3[PO4^-3]

[Li+] = 1M (from the LiCl solution)

2.37 x 10^-4 = (1M)^3 [PO4^-3]

[PO4^-3] = 2.37 x 10^-4 / (1M)^3

[PO4^-3] = 2.37 x 10^-4 M

Therefore, the molar solubility of Li3PO4 in a 1M LiCl solution is 2.37 x 10^-4 M.

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Answer and Explanation:

D. I think..

44.25 gmol of CO and 40.5 gmol of H2O were produced from  thermal decomposition of 5.0 kg of the unknown starch.

Based on given elemental composition of the starch, we can calculate the molecular formula of starch as C6H10O5.

Mass of C in 5.0 kg starch =\(5.0 kg * 21.24 wt\% = 1.062 kg\)

Mass of H in 5.0 kg starch =\(5.0 kg * 3.24 wt\% = 0.162 kg\)

Mass of O in 5.0 kg starch = \(5.0 kg * 75.52 wt\% = 3.776 kg\)

Using the molecular formula C6H10O5, the total molar mass of starch is 162 g/mol. The balanced chemical equation for thermal decomposition of the starch:\(C6H10O5 -- > 6CO + 5H2O\)

Moles of CO = \((1.062 kg / 12 g/mol) * (6 mol CO / 1 mol C6H10O5) = 44.25 mol CO\)

moles of H2O = \((0.162 kg / 2 g/mol) * (5 mol H2O / 1 mol C6H10O5) = 40.5 mol H2O\)

volume of CO = \((44.25 mol CO) *(22.4 L/mol) = 991.8 L CO\)

volume of H2O = \((40.5 mol H2O) * (22.4 L/mol) = 907.2 L H2O\)

Therefore, 44.25 gmol of CO and 40.5 gmol of H2O were produced from the thermal decomposition of 5.0 kg of the unknown starch.

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Answer:

See explanation

Explanation:

A system is said to have attained dynamic equilibrium when the rate of forward reaction and the rate of reverse reaction are equal.

Considering the system under consideration;

I2(s)⇄I2(g)

Heating the container converts solid iodine to purple coloured iodine vapour.

At equilibrium, there will be no net change in the amount of solid iodine and iodine vapour present in the system because the two processes (forward and reverse reactions) occur at the same rate at equilibrium.

Yes, hexane and diethyl ether, a solvent pair, will definitely function as a team during crystallization.

This is due to the fact that crystal formation requires a miscible solvent pair. Normally, two solvents—one in which the compound is soluble and one in which it is not—are required for crystallization. Additionally, these two solvents ought to mix easily.

Hexane and diethyl ether, the given solvent pair, are miscible with one another. Therefore, we can crystallize using the solvent pair mentioned above.

What is crystallization?

Crystallization is the process of increasing the concentration of a solution to a supersaturated state in order to form solid particles in a homogeneous phase. Crystallization is the process by which crystals are formed from either melted material or a solution.

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The average molecular speed in a sample of gas at a certain temperature is 296 m/s.

To find the average molecular speed in a sample of gas at the same temperature, we can use the formula for the root-mean-square (RMS) speed of gas molecules. The RMS speed is equal to the square root of (3RT/M), where R is the ideal gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas.

Since the temperature is the same in both samples, the RMS speed will also be the same. Therefore, the average molecular speed in the second sample of gas at the same temperature is also 296 m/s.

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Answer:

In this reaction Kp2 (150.2) is much smaller than Kp1 (2.26 * 104). Therefore, reactants (CO and H2) will be favored at equilibrium for the reaction 1/2 CO(g) + H2 (g) ⇌ 1/2 CH3OH(g).

The equation for the given reaction is CO(g) + 2 H2(g) ⇌ CH3OH(g) with an equilibrium constant of Kp = 2.26 * 104 at 298 K.

To calculate the Kp for the reaction 1/2 CO(g) + H2 (g) ⇌ 1/2 CH3OH(g), we first need to write the balanced equation as follows:

CO(g) + 2 H2(g) ⇌ CH3OH(g)   ... (1)

Dividing the equation (1) by 2, we get:

1/2 CO(g) + H2(g) ⇌ 1/2 CH3OH(g)   ... (2)

Now, we can calculate the Kp for the reaction (2) by using the following equation:

Kp2 = (PCH3OH/0.5) / (PCO/0.5 * PH2)

where PCH3OH, PCO, and PH2 are the partial pressures of CH3OH, CO, and H2 at equilibrium.

Since the stoichiometric coefficients for the reactants and products in equation (2) are the same, the partial pressures of CO, H2, and CH3OH at equilibrium will be equal to each other.

Therefore, we can simplify the above equation as:

Kp2 = PCH3OH2 / PCO / PH2

Kp2 = (Kp1)1/2 = (2.26 * 104)1/2 = 150.2

So, Kp for the reaction 1/2 CO(g) + H2 (g) ⇌ 1/2 CH3OH(g) is 150.2.

To predict whether reactants or products will be favored at equilibrium, we can compare the calculated Kp value for the reaction with the equilibrium constant value of Kp = 2.26 * 104 for the given reaction.

If Kp for the reaction is greater than Kp for the given reaction, then products will be favored at equilibrium. However, if Kp for the reaction is less than Kp for the given reaction, then reactants will be favored at equilibrium.

Here, Kp2 (150.2) is much smaller than Kp1 (2.26 * 104). Therefore, reactants (CO and H2) will be favored at equilibrium for the reaction 1/2 CO(g) + H2 (g) ⇌ 1/2 CH3OH(g).

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For the reaction CO(g) + 2 H2(g) ⇌ CH3OH(g), Kp = 2.26 * 104 at 298 K.

To calculate Kp for the reaction 1/2 CO(g) + H2 (g) ⇌ 1/2 CH3OH(g), we need to use the following equation:

Kp = (PCH3OH)1/2 / (PCO)(PH2)1/2

We know that the reaction coefficient for CH3OH is 1/2, which means that its partial pressure will be (PCH3OH)1/2 at equilibrium. Similarly, the reaction coefficient for CO and H2 is 1, which means that their partial pressures will be (PCO) and (PH2) at equilibrium.

Since the stoichiometry of the two reactions is the same, the equilibrium partial pressures of CO, H2, and CH3OH will be the same for both reactions. Therefore, Kp for the reaction 1/2 CO(g) + H2 (g) ⇌ 1/2 CH3OH(g) will also be 2.26 * 104.

To predict whether reactants or products will be favored at equilibrium, we need to compare Qp (the reaction quotient) with Kp (the equilibrium constant). If Qp < Kp, then the reaction will proceed in the forward direction (products will be favored), and if Qp > Kp, then the reaction will proceed in the reverse direction (reactants will be favored).

For the reaction CO(g) + 2 H2(g) ⇌ CH3OH(g), the reaction quotient Qp can be expressed as:

Qp = (PCH3OH) / (PCO)(PH2)2

If Qp < Kp, then products will be favored at equilibrium, which means that more CH3OH will be formed. If Qp > Kp, then reactants will be favored at equilibrium, which means that more CO and H2 will be present.

Similarly, for the reaction 1/2 CO(g) + H2 (g) ⇌ 1/2 CH3OH(g), we can calculate Qp using the same equation as before:

Qp = (PCH3OH)1/2 / (PCO)(PH2)1/2

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Nitrogen=21.1999%

Hydrogen=6.1023%

Sulfur=24.2660%

The percent composition of nitrogen, hydrogen, sulfur , oxygen in ammonium sulfate is 21.18%, 6.05%,24.21%,48.43% respectively.

The percent composition  is defined as a convenient way to record concentration of solution.It is a expression which relates solute to solvent as,mass of solute/mass of solution ×100.It helps in elemental analysis of a given compound by giving proportions in which they are present.

Percent composition of N= 28/132.14×100=21.18%

Percent composition of H=8/132.14×100=6.05%

Percent composition of S=32/132.14×100=24.21%

Percent composition of O=64/132.14×100=48.43%.

Thus, the percent composition of nitrogen, hydrogen, sulfur , oxygen in ammonium sulfate is 21.18%, 6.05%,24.21%,48.43% respectively.

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Answer:

atoms

Explanation:

If we remove an electron from a stable atom, the atom becomes electrically incomplete/unbalanced. That is, there are more protons in the nucleus (positive charges) than there are electrons (negative charges). With an electron removed, the atom possesses a plus one charge, therefore it is a positive ion.

The atomic number of sulfur = 16. Hence, in the Sulfur nucleus, 16 protons and 16 electrons (revolving the nucleus).

Now, if 2 protons and 2 electrons are removed from sulfur then number of protons = (16-2) = 14 and number of electrons = (16-2) = 14.

So, the new element has 14 protons and 14 electrons. Silicon atom has 14 protons and 14 electrons. So, the new element is Si.

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