What is the percent composition by mass of each element in Co(HSO4)2?
Show how you worked out the problem!!!!
______________% Co
_______________% H
----------------------------% O
------------------------------% S

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Answer:

Explanation:

An element's atomic number defines the amount of protons an element may contain. The atomic number is usually the big number that is shown on top. Therefore, with 17 protons it will always be chlorine. 

Answer:

1

False. if they all moved together at any time then it would be a million things withinthe human species all at once at a high rate

The whole phrase is indeed the atoms kinetic energy when solids melt to produce liquids.

Structure stiffness and resilience to changes in volume or form define solids. A solid item does not expand like a gas or flow to conform to the geometry of the space it occupies, unlike a liquid, which does both.

Solid matter keeps a constant size and shape, while liquid stuff adapts to the form of its containment while just slightly changing its volume, and gas material expands to take up the intensity and structure of its container.

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The correct answer is (B) 2NO(g) + Cl2 (g) + 2NOCI (8). Increasing the total pressure on the reaction mixture will increase the yield of products. For the second question, the correct answer is (E) 7 x 102. Kp for the molar solubility of magnesium carbonate is 3.6 x 10-4.

Chemical equilibrium refers to the situation in a chemical reaction where both the reactants and products are present in concentrations that have no further tendency to change over time, preventing any discernible change in the system's properties. When the forward reaction and the reverse reaction go forward at the same speed, this condition results. The forward and backward reactions typically have equal, if not zero, reaction rates. The concentrations of the reactants and products do not change on a net basis as a result. Dynamic equilibrium is the name given to such a situation.

The reaction's Gibbs free energy, G, must be taken into account at constant temperature and pressure. The Helmholtz free energy, A, must be taken into account at constant temperature and volume. The reaction's entropy, S, must be taken into account at constant internal energy and volume.

In geochemistry and atmospheric chemistry, where pressure changes are considerable, the constant volume case is crucial.

It is thought about the case of constant pressure. By taking into account chemical potentials, the relationship between the Gibbs free energy and the equilibrium constant can be discovered.

The Gibbs free energy for the reaction, G, under constant temperature and pressure in the absence of an applied voltage, depends only on the degree of the reaction: (Greek letter xi), and can only decrease in accordance with the second law of thermodynamics. That indicates that if the reaction occurs, the derivative of G with respect to must be negative; at equilibrium, this derivative equals zero.

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You would need to weigh out \(875 grams\) of sodium carbonate to make \(2.5 kg\) of a \(35.0\%\) (w/w) solution.


First, convert \(35.0\%\) to a decimal by dividing it by \(100\):

\(35.0/100 = 0.35\)

Then, multiply the decimal by the total weight (\(2.5 kg\)) to find the grams of sodium carbonate:

\(0.35 * 2.5 kg = 0.875 kg\)

Next, we need to convert the kilogram (\(kg\)) measurement to grams (\(g\)) since the question asks for the amount in grams.

Since \(1 kg\) is equal to \(1000 g\), we can multiply the amount in \(kg\) by \(1000\):

\(0.875 kg * 1000 g/kg = 875 g\)

Therefore, you would need to weigh out \(875 grams\) of sodium carbonate to make \(2.5 kg\) of a \(35.0\%\) (w/w) solution.

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Answer:

Suppose a piece of iron with a mass of 21.5 g at a temp of 100.0 °C is dropped into an insulated container of water. The mass of the water is 132.0 g and its temperature before adding the iron is 20.0 °C. What will be the final temp of the system? Specific heat of iron is 0.449 kJ/kg K.

Solution:

1) Since

qlost, metal = qgained, water

we write

(mass) (Δt) (Cp, metal) = (mass) (Δt) (Cp, water)

2) Substituting:

(21.5) (100 − x) (0.449) = (132.0) (x − 20) (4.184)

Some explanation:

a) 100 − x is the Δt for the metal; it starts at 100.0 °C and drops to some unknown, final value.

b) x − 20 is the Δt for the water; it starts at 20.0 °C and rises to some unknown, final value.

c) Since both metal and water wind up at the same ending value, we need to use only one unknown for the two Δt expressions.

3) A wee bit of algebra:

(2150 − 21.5x) (0.449) = (132x − 2640) (4.184)

965.35 − 9.6535x = 552.288x − 11045.76

561.9415x = 12011.11

To 3 sig figs, the answer is 21.4 °C.

Explanation:

hope its correct!

Explanation:

The electronic configuration of Selenium(Se) is 1s22s22p63s23p63d104s24p4 we remove electron .the electron configuration is1s22s22p63s23p63d104s24p4

the correct anwser is C

The electron configuration for Selenium is: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴.

Therefore, option c is correct.

The electronic configuration of an element is the filling of electron from lower energy level to the higher energy level. This is according to the Aufbau's principle.

Selenium has 34 electrons. The electronic configuration of Selenium can be determined by filling the electrons in increasing order of energy levels and sub-levels.

The electronic configuration of Selenium can be written as:

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴

Here, 4s is more energetic than 3d and thus occupies first.

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The given number is written incorrectly because in the integer part of the number there should be a number between 1 and 10, here it is 423, which is not in this interval.

To write it properly, put the decimal dot two place to the left and add 2 to the power of 10. This way:

0.38% of water on the planet is in the form of fresh surface water.

Fresh surface water refers to water that is found on the Earth's surface in lakes, rivers, and streams. Out of the total water on the planet, only a small fraction is in the form of fresh surface water. This means that most of the water on Earth is not readily accessible for human use. The remaining percentage of water includes saltwater in the oceans, water in ice caps and glaciers, and water underground.

The availability of fresh surface water is essential for human and ecosystem survival, as it is the main source of drinking water and supports various forms of life. Protecting and conserving this precious resource is crucial to ensure its sustainable use for future generations.

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0.38% of water on the planet is in the form of fresh surface water.

Fresh surface water refers to water that is found on the Earth's surface in lakes, rivers, and streams. Out of the total water on the planet, only a small fraction is in the form of fresh surface water. This means that most of the water on Earth is not readily accessible for human use. The remaining percentage of water includes saltwater in the oceans, water in ice caps and glaciers, and water underground.

The availability of fresh surface water is essential for human and ecosystem survival, as it is the main source of drinking water and supports various forms of life. Protecting and conserving this precious resource is crucial to ensure its sustainable use for future generations.

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The equilibrium constant of the reaction from the calculation that has been done is 0.154

The concentrations (or partial pressures) of reactants and products in chemical equilibrium for a specific chemical reaction are related by the equilibrium constant (K), a mathematical equation. It quantifies the degree to which an equilibrium has been reached in a reaction.

We have the equation of the reaction as;

A(g) + B(g) ⇔C(g)

Thus;

Keq = 45.83/11.23 * 26.50

Keq = 0.154

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Answer:

156

Explanation: SKSKSKSKSKSKKSKSKSKSKKS

Answer:

5

Explanation:

fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

The predicted equilibrium constant for the reaction N2(g) + O2(g) + Br2(g) ⇌ 2NOBr(g) is approximately 1.113 × 10^31.

To predict the equilibrium constant for the reaction N2(g) + O2(g) + Br2(g) ⇌ 2NOBr(g), we can use the equilibrium constants of the given reactions as a reference. By applying the principle of the equilibrium constant and manipulating the equations, we can determine the equilibrium constant for the desired reaction.

Explanation:

To predict the equilibrium constant for the reaction N2(g) + O2(g) + Br2(g) ⇌ 2NOBr(g), we can utilize the equilibrium constants of the given reactions.

The first step is to write the balanced equations for the given reactions:

NO(g) + 1/2Br2(g) ⇌ NOBr(g) Kp = 5.3

2NO(g) ⇌ N2(g) + O2(g) Kp = 2.1×10^30

To obtain the desired reaction, we can sum the equations in a way that cancels out the common species on both sides of the reaction. Here's how we can do it:

2NO(g) + Br2(g) ⇌ 2NOBr(g) (multiplied equation 1 by 2)

Now, we can use the principle of the equilibrium constant, which states that the equilibrium constant for a reaction composed of multiple steps is the product of the equilibrium constants of the individual steps. Therefore, the equilibrium constant for the desired reaction is:

Kp(desired) = Kp(eq1) × Kp(eq2)

= 5.3 × (2.1×10^30)

= 1.113 × 10^31

So, the predicted equilibrium constant for the reaction N2(g) + O2(g) + Br2(g) ⇌ 2NOBr(g) is approximately 1.113 × 10^31.

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The formula for the conjugate acid of NO3 is HNO3-.

The formula for the conjugate base of NHy+ is NHy.

According to the Bronsted-Lowry acid-base theory, a conjugate acid is a chemical molecule that is created when an acid donates a proton (H+) to a base; in other words, it is a base that has had a hydrogen ion added to it, as in the opposite reaction, the base loses a hydrogen ion. A conjugate base, on the other hand, is what remains after an acid donates a proton during a chemical process. Therefore, a conjugate base is a species created by removing a proton from an acid because it can gain a hydrogen ion in the opposite reaction. [1] The conjugate base of an acid may also be acidic since some acids have the capacity to release numerous protons.

The formula for the conjugate acid of NO3 is HNO3-

The formula for the conjugate base of NHy+ is NHy

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The correct formula of the oxide that forms when X burns in oxygen is X2O3.

Ionization energy is defined as the energy required to remove an electron from an atom. There are as many ionization energies present in an atom as there are electrons in that atom.

However, we can know the ionization energy values that belong to electrons in the outermost shell because they lie close together. If we go further into the inner shells, there is a sudden quantum jump in ionization energy values.

The element X must have three valence electrons because  631 ,1235, 2389 all refer to ionization energies of electrons in the valence shell. As we get into a core shell, there is a sudden jump hence the fourth and fifth ionization energies are 7089 and 8844 respectively.

The correct formula of the  oxide that forms when X burns in oxygen is X2O3.

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Answer:

Motion, in physics, change with time of the position or orientation of a body. In both cases all points in the body have the same velocity (directed speed) and the same acceleration (time rate of change of velocity).

Explanation:

Among the given options, the functional group that cannot hydrogen bond with itself is: 1) Ethers Ethers, which have the general formula R-O-R', consist of two alkyl or aryl groups bonded to an oxygen atom.

While oxygen is capable of forming hydrogen bonds with hydrogen atoms from other functional groups, ethers themselves do not have hydrogen atoms directly bonded to the oxygen atom. As a result, ethers lack the necessary hydrogen bonding donor or acceptor sites required for intermolecular hydrogen bonding.

2) Tertiary amines: Although they lack a hydrogen atom directly bonded to the nitrogen atom, they can still participate in hydrogen bonding as hydrogen bond acceptors.

3) Esters: The oxygen atom in the ester functional group can act as both a hydrogen bond donor and acceptor, enabling intermolecular hydrogen bonding.

4) Carboxylic acids: Carboxylic acids have a hydrogen atom bonded to the oxygen of the carboxyl group, making them capable of forming hydrogen bonds with other carboxylic acid molecules through the oxygen and hydrogen atoms.

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Answer:

valancy

Explanation:

Answer:

409.0 grams

Explanation:

total mass-(mass of salt+mass og empty beaker)

Answer:

442

Explanation:

og empty beaker + salt

Answer:

Fossil fuel

Explanation:

Answer:

2

Explanation:

Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs.

A flame test cannot replace a spectrograph for identification purposes because flame tests only provide limited information about the identity of an unknown substance, while spectroscopy provides detailed information about the chemical composition of a sample.

Flame tests are qualitative tests that rely on the emission of characteristic colors of light when an unknown substance is placed in a flame. These colors are due to the excitation of electrons in the atoms of the substance to higher energy levels, followed by the emission of light as the electrons return to lower energy levels. Each element emits a unique pattern of colors, allowing for the identification of certain elements present in a sample. However, the flame test is limited in that it cannot identify trace amounts of elements or distinguish between elements with similar emission spectra.

On the other hand, spectroscopy provides much more detailed information about the chemical composition of a sample. Spectroscopy involves the measurement of the interaction between electromagnetic radiation and matter, allowing for the identification and quantification of elements and molecules in a sample. Different types of spectroscopy (such as atomic absorption spectroscopy, infrared spectroscopy, or mass spectrometry) provide different types of information, but all can provide highly detailed information about the chemical composition of a sample.

A scientist could use a flame test in conjunction with a spectrograph to help identify unknown substances. The flame test could be used as a quick initial screening method to determine the presence of certain elements in a sample, while the spectrograph could be used to obtain more detailed information about the chemical composition of the sample. By combining the results of both tests, a scientist could obtain a more complete understanding of the sample's composition.

Answer: A flame test can't replace a spectrograph for identification purposes because flame tests only provide a little information about the identity of an substance and spectroscopy gives more precise information about the chemical composition of a specimen

Explanation: Easy I read a book on it

Answer:

The energy of the wave particle is 3.058 x 10⁻²³ J.

Explanation:

Given;

wavelength of the wave particle, λ = 6.5 x 10⁶ nm = (6.5 x 10⁶) x 10⁻⁹ m

The energy of the wave particle is calculated as;

\(E = hf\\\\E = \frac{hc}{\lambda}\)

where;

h is Planck's constant = 6.626 x 10⁻³⁴ J/Hz

c is speed of light = 3 x 10⁸ m/s

\(E = \frac{(6.626 \times 10^{-34})(3\times 10^8)}{6.5 \times 10^6 \times 10^{-9}} \\\\E = 3.058 \times 10^{-23} \ J\)

Therefore, the energy of the wave particle is 3.058 x 10⁻²³ J.

There are three main pathways that produce ATP molecules in cells: glycolysis, the citric acid cycle (also known as the Krebs cycle), and the electron transport chain.

The ATP (Adenosine Triphosphate) molecule is the main source of energy for cells. It's the energy currency used by cells to perform various functions.

Of these three pathways, the electron transport chain produces the most ATP molecules. This process occurs in the mitochondria, which are the powerhouse of the cell. In this process, electrons are transferred from molecule to molecule, releasing energy along the way. This energy is used to pump hydrogen ions into the inner membrane space of the mitochondria. When these hydrogen ions flow back through the membrane, they release energy that is used to generate ATP molecules.

The electron transport chain involves four protein complexes, each with its own specific function. These complexes work together to transfer electrons from one molecule to the next, releasing energy as they go. At the end of the chain, the electrons are used to reduce oxygen to form water. This process generates a large amount of energy, which is stored in the ATP molecules.

The electron transport chain produces approximately 34 ATP molecules for each molecule of glucose that enters the mitochondria. This is much more than the 2 ATP molecules produced by glycolysis, and the 2-3 ATP molecules produced by the citric acid cycle.

The activity involved in respiration, known as glycolysis, takes place in the cytoplasm of the cell. The citric acid cycle is the second respiration process that takes place inside the cell's mitochondria.

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An allylic carbocation is an example of a system that is:

An allylic carbocation is a resonance-stabilized carbocation with a formal charge of +1 on an allylic carbon in each of the two resonance forms.

Thus, it is correct to state that:

An allylic carbocation is an example of a system that is:

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Full Question:

An allylic carbocation is an example of a(n) _______ system. (Select all that apply.)

- localized

- isolated

- delocalized

- conjugated

When attempting to pick up a stock bottle, it is important to hold the bottle properly to prevent accidents and spills.

Here are the general steps to follow: Ensure that the bottle is properly labeled and that you have the correct bottle for the intended use. Check the condition of the bottle for any signs of damage or leaks. If you detect any damage or leaks, do not use the bottle and notify the appropriate personnel. Put on any necessary personal protective equipment (PPE), such as gloves and safety glasses, before picking up the bottle. Hold the bottle with both hands, with one hand on the bottom of the bottle and the other hand on the neck of the stock bottle. This helps provide stability and balance. Lift the bottle slowly and steadily, being careful not to tip the bottle or drop it. If the bottle is heavy, use a cart or a dolly to transport it instead of carrying it by hand. When placing the bottle down, do so gently and carefully to avoid any spills or damage.

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Explanation:

3)

Equation -

3F₂ (g) + 2AlBr₃ (s) → 3Br₂ (l) + 2AlF₃ ↓

4)

When sulphur dioxide gas reacts with oxygen then it forms sulphur trioxide gas.

Equation -

2SO₂ (g) + O₂ (g) → 2SO₃ (g)

Answer:

B

Explanation:

a. The chemical equation for the reaction that occurs between hydrochloric acid, HCl, and potassium hydroxide, KOH, is:
HCl + KOH → KCl + H₂O

b. The name of the salt produced in this neutralization reaction is potassium chloride, KCl.

A chemical equation can be described as an icon that shows a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side. A chemical equation will tell you the formulas and symbols of the reactants and products. A chemical equation can present the physical state of an element, whether it is a solid, liquid, gas, or in solution.

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Answer:

OPTUON C,CHEMICALLY BONDED