Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30x10⁻⁸ at 700°C:2H₂S(g) ⇄ 2H₂(g) + S₂(g) If 0.45 mol of H₂S is placed in a 3.0-L container, what is the equilibrium concentration of H₂(g) at 700°C?

The balanced equation for the reaction between H2SO4 and NaOH is:

H2SO4 + 2NaOH → Na2SO4 + 2H2O

The molarity of the H2SO4 solution is approximately 0.248 M.

From the balanced equation, we can see that the mole ratio between H2SO4 and NaOH is 1:2. This means that for every mole of H2SO4, we need 2 moles of NaOH to react completely.

Given that the volume of NaOH used is 20.36 mL - 0.31 mL = 20.05 mL, which is equal to 0.02005 L.

Using the mole ratio, we can determine the moles of H2SO4:

Moles of H2SO4 = Moles of NaOH / 2

Moles of H2SO4 = (0.500 M) × (0.02005 L) / 2 = 0.005025 mol

Now, we can calculate the molarity of the H2SO4 solution:

Molarity of H2SO4 = Moles of H2SO4 / Volume of H2SO4 (in L)

Molarity of H2SO4 = 0.005025 mol / 0.01000 L = 0.5025 M

Rounding to three significant digits, the molarity of the H2SO4 solution is approximately 0.248 M.

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The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Answer:

try use Google search

Explanation:

you need to use it

Answer:

B.) One oceanic plate converging with one continental plate.

HOPE THIS HELPS!

Answer:

C: Two tectonic plates transforming

The enthalpy of combustion of methane is approximately -890.65 kJ/mol.

To calculate the enthalpy of combustion of methane (CH4), we can use the standard enthalpies of formation (ΔH°f) for methane (CH4), carbon dioxide (CO2), and water (H2O).

The combustion reaction of methane can be represented as follows:

CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

The standard enthalpy change for this reaction, ΔH°comb, can be calculated using the standard enthalpies of formation:

ΔH°comb = Σ(nΔH°f,products) - Σ(mΔH°f,reactants)

where n and m are the stoichiometric coefficients of the products and reactants, respectively.

Given:

ΔH°f(CH4) = -74.85 kJ/mol

ΔH°f(CO2) = -393.5 kJ/mol

ΔH°f(H2O) = -286 kJ/mol

Using the equation above, we can calculate the enthalpy of combustion:

ΔH°comb = [1 × ΔH°f(CO2)] + [2 × ΔH°f(H2O)] - [1 × ΔH°f(CH4)]

        = [1 × (-393.5 kJ/mol)] + [2 × (-286 kJ/mol)] - [1 × (-74.85 kJ/mol)]

        = -393.5 kJ/mol - 572 kJ/mol + 74.85 kJ/mol

        = -890.65 kJ/mol

Therefore, the enthalpy of combustion of methane is approximately -890.65 kJ/mol.

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Answer:

Obtain the relative numbers of atoms of each element in the compound by dividing the number of moles of each element in the 100 g sample by the number of moles of the element present in the smallest amount.

Answer:

Obtain the relative numbers of atoms of each element in the compound by dividing the number of moles of each element in the 100 g sample by the number of moles of the element present in the smallest amount.

Answer:

but were is the answer

Explanation:

i am so confuesed

Primary carbon - 7

Secondary carbon -2

Tirtiary carbon - 2

quaternary Carbon - 2

The plot of temperature (K) vs. intrinsic carrier concentration for an n-type Silicon wafer with a donor density (Na) of \(10^17 cm^−3\) shows an exponential increase in carrier concentration as temperature rises.

The intrinsic carrier concentration (ni) in a semiconductor material represents the density of thermally generated carriers (electrons and holes) in the absence of any impurities.

It depends on temperature and the energy bandgap of the material. In silicon, the intrinsic carrier concentration can be described by the following equation:

\(\[n_i = A \cdot T^{3/2} \cdot e^{-E_g/(2kT)}\]\)

Where:

- A is a constant

- T is the temperature in Kelvin

- E_g is the energy bandgap of silicon

- k is the Boltzmann constant

As temperature increases, the intrinsic carrier concentration also increases due to two main factors. Firstly, the exponential term in the equation dominates, causing a significant increase in carrier concentration. Secondly, the temperature dependence of the energy bandgap amplifies the effect.

The exponential increase arises from the increasing number of thermally generated electron-hole pairs. At higher temperatures, more valence band electrons acquire sufficient thermal energy to cross the energy bandgap and become free electrons in the conduction band.

Similarly, more conduction band electrons recombine with valence band holes, leading to an increase in both electron and hole concentrations.

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Answer: Thermal Energy

Explanation:

Answer:

Explanation:

vdW radius (nm) ionic radius of X- (nm)

Cl 0.175          0.181

Br 0.185          0.196

I 0.198          0.220

Answer:

Liquid A

Explanation:

the least dense will be at the top. like icecubes in water. the ice is less dense than the water so it floats

Answer:

Liquied A

Explanation:

It is at the top and it is the lightest if it is at the bottom then it has the most density

The wavelength of an electron can be calculated using the formula: wavelength = h / (mass of electron * velocity). Since kinetic energy is equal to the mass of the electron multiplied by the velocity squared, we can also calculate wavelength by using the formula: wavelength = h / sqrt(2mass of electron kinetic energy).

To convert the kinetic energies given in electron volts (eV) to Joules (J), you can use the formula: 1 eV = 1.6 x 10^-19 J

(a) 20.0 eV = 3.2 x 10^-18 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-18 J) = 2.4 x 10^-12 m or 2.4 pm (picometers)

(b) 200 eV = 3.2 x 10^-17 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-17 J) = 2.4 x 10^-11 m or 24 pm

(c) 2.00 keV = 3.2 x 10^-14 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-14 J) = 2.4 x 10^-8 m or 2.4 nm

(d) 20.0 keV = 3.2 x 10^-13 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-13 J) = 2.4 x 10^-7 m or 24 nm

(e) 0.200 MeV = 3.2 x 10^-11 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-11 J) = 2.4 x 10^-5 m or 0.24 nm

(f) 2.00 MeV = 3.2 x 10^-10 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-10 J) = 2.4 x 10^-4 m or 2.4 nm

A lower energy electron will have a longer wavelength, while a higher energy electron will have a shorter wavelength. To study the crystal structure of NaCl, you would need to use a technique such as X-ray diffraction, which typically uses X-rays with energies in the range of a few keV to a few tens of keV. Based on this, 2.00 keV and 20.0 keV energies are most suited for study of the NaCl crystal structure.

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High ATP concentrations allosterically block the cellular homologs of pyruvate kinase.

Phosphofructokinase activity was hindered by low ATP concentrations through lowering the enzyme's affinity for fructose 6-phosphate, the other substrate. Phosphofructokinase was similarly inhibited by citrate and other tricarboxylic acid cycle intermediates.

The reactions of gluconeogenesis, starting with pyruvate, are as follows: Pyruvate carboxylase uses the mitochondrion to carboxylate pyruvate to create oxaloacetate. Pyruvate carboxylase needs biotin as a cofactor and ATP as such an activating molecule.

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On the graph,

To know what each letters represents, we must understand what an energy profile diagram is.

An energy profile diagram is a representation of chemical reaction, showing the pathways in which reactants follows to become products.

With the above information, we can say that:

Every reaction has a peak energy. This peak energy is referred to as the activation complex. The activation complex is the highest energy of the reaction. Looking at the diagram, we can see that B is at the peak.

Thus, letter B represents the activation complex

Also, every reaction has activation energy. This is the minimum energy required for a reaction to occur. In profile diagram the activation energy is the energy between the peak (i.e activation complex) and the reactant. from the graph, we can see that letter D lies between the letter B and A.

Thus, we can say letter D is the activation energy

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Answer:

Option D.

Explanation:

Isomerism is a phenomenon where by two or more compounds have the same molecular formula but different structural patterns. The compounds involved are called isomers.

Option A has two different compound with two different molecular formula. Hence they are not isomers.

Option B has two different compound with two different molecular formula. Hence they are not isomers

Option C can not be called isomers because Isomerism can not occur in compound having just 1 carbon atom.

Option D has two different compound with the same molecular formula as C3H8O and their structure are different. Hence they areisomers.

ok so basically the answer is notijng

Answer:

+25

Explanation:

The charge of the nucleus of an atom with 25 protons is +25 regardless of the number of other particles.

BTW, I believe this is Magnesium... I am not sure, but that ingfo may help you more than I can...

Answer:

6.4

Explanation:

Answer:

In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by chemical means. Wikipedia

Decomposition is the process by which substances are broken down into simpler compounds.

It involves the breakdown of complex molecules into smaller, more basic components through chemical or biological processes. These processes can include various mechanisms such as hydrolysis, oxidation, fermentation, or enzymatic reactions. Decomposition is a fundamental part of nutrient cycling and plays a crucial role in the recycling of organic matter in ecosystems.

The decomposition of carbonic acid in soft drinks, which can be represented by the chemical equation:

H₂CO₃ → H₂O + CO₂

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The atmospheric concentration of a gas depends on its emission into the atmosphere and its rates of physical, chemical and biological removal. The time to lower the concentration of the gas to 37% of its original amount is its atmospheric lifetime.

The measurements of CO2 equivalents in parts per million CO2 is termed as atmospheric concentration. The pressure exerted by the atmosphere on the gas is called atmospheric pressure.

The atmospheric lifetime of a species mainly measures the time which is require to restore equilibrium in the atmosphere that follows a sudden decrease or increase in the concentration of the species in the atmosphere.

Emission is something which can be released, emitted or discharge.

Types of emission

Thus, we concluded that the atmospheric concentration of a gas depends on its emission into the atmosphere and its rates of physical, chemical and biological removal. The time to lower the concentration of the gas to 37% of its original amount is its atmospheric lifetime.

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Answer:

1 = -15. 2 = +5

Explanation:

i just did it good luck

Answer:

C4H8. butene

Answer:

1. O2

The oxygen molecule is a non-polar covalent molecule. It is formed by sharing of electrons. As the molecule is symmetric, the electrons are pulled by both the atoms in an equal amount.

2. CaO:

The association of two ions forms calcium oxide. The ions are calcium ion and oxide ion. Such a compound is called an ionic compound.

3. Br2:

Bromine molecule contains a non-polar covalent bond because both the atoms share an equal number of electrons, and it is symmetric.

4. HBr:

Hydrogen bromide is a polar covalent compound. It is an asymmetric charge between hydrogen and bromine. Bromine being more electronegative, tends to pull the electron itself.

The volume of carbon dioxide produced when 10.0 L of oxygen is consumed is 6.67 L of CO2 (rounded to two decimal places).

Given balanced equation: C2H4(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(g)The molar volume of all gases at standard temperature and pressure is 22.4 L/mol.Using the balanced equation, we can find the ratio of the volume of oxygen used to carbon dioxide produced.C2H4(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(g)3 moles of O2 produce 2 moles of CO2So, 1 mole of O2 produces (2/3) moles of CO2 or 1 mole of CO2 produces (3/2) moles of O2.

To find the volume of carbon dioxide produced when 10.0 L of oxygen is consumed, we need to use the mole ratio:3 mol O2 → 2 mol CO22/3 mol CO2 is produced by 3 mol O210.0 L of O2 is consumed, which is equal to 10.0/22.4 = 0.4464 moles of O2Thus, using the mole ratio:0.4464 mol O2 × (2/3) mol CO2/1 mol O2 = 0.2976 mol CO2The volume of 0.2976 mol CO2 is:0.2976 mol CO2 × 22.4 L/mol = 6.67 L of CO2 (rounded to two decimal places).

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The kinetic molecular theory (KMT) is a model used to explain the behavior of gases based on the motion of their individual particles.

Let's analyze the given statements and determine which ones are not consistent with KMT:

1. "Gases consist of small particles called molecules or atoms that are in constant motion." - This statement is consistent with KMT. According to the theory, gases are made up of small particles (atoms or molecules) that are constantly moving and colliding with each other and the walls of their container.

2. "Gas particles are always attracted to each other." - This statement is not consistent with KMT. The theory assumes that gas particles have negligible attractive forces between them. Instead, it states that they only interact through collisions.

3. "Gas particles have definite shapes and volumes." - This statement is not consistent with KMT. According to KMT, gas particles do not have definite shapes or volumes. They take on the shape and volume of their container, as they are highly compressible and can fill the available space.

4. "The average kinetic energy of gas particles is directly proportional to their temperature." - This statement is consistent with KMT. KMT states that the average kinetic energy of gas particles is directly proportional to their temperature. As the temperature increases, the particles move faster and have higher kinetic energy.

In summary, the statements that are not consistent with KMT are:
2. "Gas particles are always attracted to each other."
3. "Gas particles have definite shapes and volumes."

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Answer:

The answer is 14,400 seconds.

Explanation:

Hope it helps man ...

Answer:14400secondsExplanation:                                                                            

Answer: 1) The answer is: c) protons and neutrons.

2) The answer is: a) electrons.

Explanation:

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, Much of the mass of an atom is concentrated in its nucleus. The nucleus contains  protons and neutrons and the outer part of the atom contains  electrons.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Electron has -1 charge while proton has +1 charge. Neutron is neutral.

Much of the mass of an atom is concentrated in its nucleus. The nucleus contains  protons and neutrons and the outer part of the atom contains  electrons.

Therefore, much of the mass of an atom is concentrated in its nucleus. The nucleus contains  protons and neutrons and the outer part of the atom contains  electrons.

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