the half-life of methyl mercury in the body is 70 days. how many days are required for the amount of methyl mercury to drop to 10% of the original value after accidental ingestion.

The chemical formula of aluminum chloride is AlCl₃ and the  chemical formula of aluminum oxide is Al₂O₃.

The chemical formula of aluminum chloride is written as;

Al³⁺  + Cl⁻   → AlCl₃

The chemical formula of aluminum oxide is written as;

Al³⁺  + O²⁻   → Al₂O₃

Thus, the chemical formula of aluminum chloride is AlCl₃ and the  chemical formula of aluminum oxide is Al₂O₃.

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density = 2.013g/cm3

Explanation:

density = mass/volume

density = 453g/225cm3

density = 2.013g/cm3

Answer:

4.167 hours

Explanation:

The drop factor is the amount of fluid falling for one millimeter of fluid in gttt/ml.

The flow rate is the volume administered for a specific period of time in ml/hr = volume / time

The unit of drip rate is gtt/min

The formula that shows the relationship is:

Drip rate = flow rate × drop factor

Given that:

Drip rate = 60 gtt / min, Flow rate = volume / time = 500 ml / t, drop factor = 30 gtt/ml

Drip rate = flow rate × drop factor

60 = 500 / t × 30

500 / t = 60/30

500 / t = 2

2t = 500

t = 500/2

t = 250 mins

1 hr = 60 min

t = 250 / 60 hours = 4.167 hours

Answer:

Either you didn't put the full question or your posting something you have to do in a pool

Explanation:

A reaction to be spontaneous,overall cell potential must be positive.

(A)The metabolite which would spontaneously reduce oxaloacetate (OAA) is:

alpha-ketoglutarate

(B)The two half cell reactions are as follows:

Reduction half reaction:

Oxaloacetate + 2 H+ + 2 e- --> malate

Oxidation half reaction:

alpha-ketoglutarate --> Succinate + CO2 + 2 H+ + 2 e-

Overall resulting balanced reaction for the reduction of OAA :

Oxaloacetate +alpha-ketoglutarate --> malate + Succinate + CO2

(C)the standard reduction potential for the reaction chosen in (B):

+0.67-0.17 = +0.50 V

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Answer:

3845

Explanation:

Answer:

it is 3845 grams

Explanation:

Problems with understanding what happens when things burn can be attributed to various factors, such as lack of knowledge about the combustion process, the role of oxygen, and the production of heat and light energy.

When things burn, a chemical reaction called combustion takes place. During this process, a fuel reacts with oxygen, resulting in the release of energy in the form of heat and light. The products of combustion are usually water, carbon dioxide, and sometimes other gases or particles, depending on the fuel and the burning conditions.

One issue in understanding this process is grasping the importance of oxygen. Oxygen is required for combustion to occur, and the presence of more or less oxygen affects the burning process. For example, in a well-ventilated area, the combustion is more efficient, whereas limited oxygen can result in incomplete combustion and the production of harmful byproducts like carbon monoxide.

Another problem in understanding combustion is the role of heat. Heat is both a product of and a catalyst for combustion. As a fuel gets heated, it may reach its ignition temperature, at which point it spontaneously ignites. Heat also contributes to the spread of fire, as it can cause nearby objects to reach their ignition temperature.

The production of light during combustion is another aspect that can cause confusion. The light emitted during burning is a result of excited atoms and molecules in the flame that release energy in the form of light when they return to their original state. This is what makes flames visible and gives them their characteristic colors.

In summary, problems with understanding what happens when things burn stem from a lack of knowledge about the combustion process, the role of oxygen, and the production of heat and light energy. Gaining a deeper understanding of these factors can help individuals better comprehend the complex nature of combustion and fire safety.

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Answer:

Explanation:

NASA uses rockets to launch astronauts and supplies to the International Space Station. Launching a rocket relies on Newton's Third Law of Motion. A rocket engine produces thrust through action and reaction. The engine produces hot exhaust gases which flow out of the back of the engine

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The sequence of the decreasing the order of stability of the given compounds is :

BaCl₂  >  CaCl₂  > MgCl₂ > AlCl₃  > HCl > AgCl

The reactivity series of metals or the activity series can be described as the arrangement of metals in the descending order of their reactivities.

The metals at the top of the activity series are powerful reducing agents and can be easily oxidized. These metals easily tarnish/corrode. The reducing ability grows weaker while moving down the series.

The electropositivity of the elements reduces as we move down the reactivity series of metals. All metals above hydrogen in the activity series liberate hydrogen gas upon reacting with dilute HCl.

As given the elements of the reactive metals form more stable compounds therefore, the metals like Ba, Ca, and Mg form more stable compounds than H or Ag.

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Answer:

pic attached

Explanation:

Answer:

A. they work together with the environment.

Explanation:

Because work together is what keep the environments clean and tidy.

The term that corresponds to the definition

The term that corresponds to the definition "the substance that carries the components of a mixture" is a solvent. A solvent is a substance that can dissolve other substances to form a homogeneous mixture. A common example of a solvent is water, which can dissolve a variety of solutes, such as salt, sugar, and other substances.

In the context of chemistry, a method used to separate components of a mixture is known as chromatography. Chromatography is a laboratory technique that involves the separation of mixtures based on the differences in their physical or chemical properties.

The substance to which the sample is bound at the start of an experiment is called the stationary phase. The stationary phase is a substance that is fixed in place during a chromatography experiment and is used to separate the components of a mixture.

The top edge of the solvent's travel when the experiment is stopped is known as the solvent front. The solvent front refers to the leading edge of the solvent in a chromatography experiment. It is typically marked with a pencil line on the chromatography paper.

A value that quantifies the distances traveled by substances relative to the distance traveled by the solvent is called the retention factor (Rf). The retention factor is a dimensionless quantity that is used to describe the relative movement of a solute in a chromatography experiment. It is calculated by dividing the distance traveled by the solute by the distance traveled by the solvent.

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Answer:

8 carbon 8 hydrogen and 3 oxygen so 19 all together

Explanation:

Satellite stays in orbit because of two factors velocity and gravitational pull of Earth.

Therefore, Satellite stays in orbit.

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Answer:

Explanation:

C₄H₈ = Alkene because it contains one double bond

General formula of alkene is CnH2n .

CH₃CH₂CH₂CH₂CH₂NH₂ = Amine ( primary )

name is pentyl amine .

The third one is benzene which is aromatic in nature .

CH₃CH₂COOCH₂CH₂NH₂ .

It is an ester as follows

CH₃CH₂COCl + NH₂CH₂CH₂OH = CH₃CH₂COOCH₂CH₂NH₂

acid chloride + alcohol        =      ester + water .

The kind of bond they will form is an ionic bond where one beryllium atom will donate electrons to two chlorine atoms (option A).

Ionic bond is a type of chemical bond where two atoms or molecules are connected to each other by electrostatic attraction.

Ionic bonds are formed by atoms with opposite charges i.e. negative (-) and positive (+) charge. The metal is usually positively charged while the nonmetal is usually negatively charged.

According to this question, the molecule beryllium chloride has one beryllium atom, a metal, and two chlorine atoms, nonmetals. This means that an ionic bond will be formed by beryllium atom and chlorine atom.

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Answer:

44

Explanation:

You multiply the length value by 1000

Answer:

0.044 km × 1000 = 44 meters

Answer:

raising the Concentration of liquid

raise the temperature of the system

bubbles of hydrogen gas

A certain first-order reaction has a rate constant of 2.55×10⁻²s⁻¹ at 25°C At 69 °C, the value of k is around 1.53 s⁻¹.

A first-order reaction is one that has a reaction rate that is linearly dependent on the concentration of just one component. In other words, a first-order reaction is a chemical reaction in which the rate of the reaction varies as a result of a change in the concentration of only one of the reactants.

k = Ae(-Ea/RT)

We can start by calculating the pre-exponential factor, A:

k = A e(-Ea/RT)

A = k / e(-Ea/RT)

At 25°C (298 K), k = 2.55×10⁻² s⁻¹. Plugging in the values for k, Ea, and T, we get:

A = (2.55×10⁻² s⁻¹ / e(-85.5 kJ/mol / (8.314 J/(mol*K) * 298 K))

A ≈ 1.43×10¹⁰ s⁻¹

Now we can use the pre-exponential factor we just calculated to find the rate constant, k, at 69°C (342 K):

k = A e(-Ea/RT)

k = (1.43×10¹⁰ s⁻¹) * e(-85.5 kJ/mol / (8.314 J/(mol*K) * 342 K))

k ≈ 1.53 s⁻¹

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Answer:

Explanation:

As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.

The heat transfer coefficient (delta Q) divided by the temperature (T) results in the change in entropy, or delta S. If a physical process can be stopped, the environment's entropy and the system's entropy will both stay constant.

When a process is occurring, the entropy of an isolated system constantly rises or, in the extreme case of a reversible process, it stays constant (never decreasing). The entropy rise principle refers to this. Entropy generation cannot be negative, but entropy change within a system or its environment may.

As a result of all energy transfers resulting in the loss of some useful energy, the entropy of the cosmos rises with each energy transfer or transformation. Entropy is a metric for determining how random and chaotic a system is.

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Correct Question:

What is the change in entropy for the process where all the energy is transferred from the hot object (AB) to the cold object (CD)

Answer:

precipitation goes to the left box

condensation goes to the bottom box

evaporation goes in the top right box

Explanation:

hope this is helpfull

can you relate to these pictures

The new volume of the balloon which was initially 3 L is 1.86 L

The new volume of the balloon can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(1.5 × 3) / 293 = (2.5 × V₂) / 303

Cross multiply

293 × 2.5 × V₂ = 1.5 × 3 × 303

732.5 × V₂ = 1363.5

Divide both side by 732.5

V₂ = 1363.5 / 732.5

V₂ = 1.86 L

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Answer:

1.9L !!!!!

Explanation:

The pH of the buffer solution is 4.76.

To calculate the pH of the buffer solution, we need to use the Henderson-Hasselbalch equation, which is given by:

pH = pKa + log([A-]/[HA])

where pKa is the dissociation constant of the weak acid, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

For acetic acid (CH3COOH), the pKa is 4.76.

Since the buffer solution contains equal concentrations of acetic acid and sodium acetate, we can assume that [A-] = [CH3COO-] = 1.00 M and M[HA] = [CH3COOH] = 1.00 M.

Therefore, plugging in these values into the Henderson-Hasselbalch equation, we get:

pH = 4.76 + log([1.00]/[1.00]) = 4.76

Therefore, the pH of the buffer solution is 4.76.

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Answer:

This is happened because, in water there is strong intermolecular force of attraction because of H- bonding. But, in case of HCl, the force of attraction is not so strong

The state of water at room temperature is liquid while Hydrogen chloride is a gas at room temperature. In consideration of three Van der Waals forces ( Keesom,  Debye, and London) which both Water and hydrogen chloride exhibit, Water exhibits hydrogen bonding, which Hydrogen chloride doesn't.

Since water has strong hydrogen bonds, more energy is required to boil water. Water has an electronegative O, water can form hydrogen bonds with other H20 molecules. We know that the hydrogen bond is stronger than the permanent dipole interaction in hydrogen chloride.

Since more energy is required to overcome the hydrogen bond in water.

Hence, the boiling point of water is 100°C while hydrogen chloride is -115°C.

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Answer:

a decrease in concentration affects the equilibrium

Explanation:

disturbance: equilibrium was disturbed by a decrease in concentration

response:system acts so as to increase concentration

reaction favoured: forward reaction

concentration: concentration of ...... ND ....... increases ND that of ......(product)decreases

Answer:

Physical entities such as light and electrons possess both wavelike and particle-like characteristics. This is known as wave/particle duality. On the basis of experimental evidence, Einstein first showed (1905) that light, which had been considered a form of electromagnetic waves, must also be thought of as particle, or localized in packets of discrete energy. Nearly twenty years later, the French physicist Broglie proposed that electrons and other discrete bits of matter, which until then had been conceived only as material particles, also have wave properties such as wavelength and frequency. Soon after, the wave nature of electrons was experimentally established. An understanding of the complementary relation between the wave aspects and the particle aspects of the same phenomenon was announced in 1928.

This dualism to the nature of light is best demonstrated by the photoelectric effect, where even a weak ultra-violet light produces a current flow - i.e., releases electrons but a red light does not release electrons no matter how intense the red light.

Physical entities such as light and electrons possess both wavelike and particle-like characteristics. This is known as wave/particle duality. If a beam of light is pointed at the negative end of a pair of charged plates, a current flow is measured. A current is simply a flow of electrons in a metal, such as a wire. Thus, the beam of light must be liberating electrons from one metal plate, which are attracted to the other plate by electrostatic forces. This results in a current flow. Normally, one would expect the current flow to be proportional to the strength of the beam of light - i.e., more light = more electrons liberated = more current. But it is observed that the current flow is constant with the intensity of the light, but varies strongly with a change in the wavelength of light such that there was a sharp cutoff and no current flow for long wavelengths.

In his scientific paper, Einstein showed that light was made of packets of energy quantum called photons. Each photon carried a specific energy related to its wavelength, such that photons of short wavelength (blue light) carry more energy than long wavelength (red light). To release an electron from a metal plate required a minimal energy i.e. the wavelength of the light had to be a sufficiently short. Each photon of blue light released an electron. But photons of red light were too weak. The result is no matter how much red light was shown on the metal plate, there was no current flow.

The photoelectric effect earned Einstein the Nobel Prize, and introduced the term "photon'' into our terminology.

If you have 6.3 moles of fluorine gas (F2) in a 3-liter jar, you can use the ideal gas law to determine the mass of fluorine present. The ideal gas law relates the pressure, volume, temperature, and number of moles of a gas to its physical properties. Rearranging the ideal gas law to solve for the mass of the gas, we have:

Mass = Number of moles x Molar mass

The molar mass of fluorine is approximately 38 g/mol. Therefore, 6.3 moles of fluorine gas would have a mass of:

Mass = 6.3 moles x 38 g/mol = 239.4 g

So, if you have 6.3 moles of fluorine gas in a 3-liter jar, you would have approximately 239.4 grams of fluorine. It is important to note that fluorine gas is extremely reactive and dangerous, so proper safety precautions should be taken when handling it.
Hi! To find the mass of fluorine in grams, we can follow these steps:

1. Determine the molar mass of fluorine gas (F2). Fluorine has a molar mass of 19 g/mol, so F2 has a molar mass of 38 g/mol (19 x 2).

2. Use the given moles of fluorine gas to find the mass in grams. We are given 6.3 moles of F2. To convert this to grams, we multiply by the molar mass of F2:

6.3 moles * 38 g/mol = 239.4 grams

So, you have 239.4 grams of fluorine gas contained in a 3-liter jar.

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The oxidation number of the sulfur atom in Li₂SO₄ is +6.

In order to determine the oxidation number of the sulfur atom in Li₂SO₄, we need to look at the oxidation numbers of the other atoms in the compound. The oxidation number of lithium (Li) is +1, and the oxidation number of oxygen (O) is -2. Since there are four oxygen atoms in the compound, the total oxidation number for oxygen is -8.

The sum of the oxidation numbers in a neutral compound is always zero. Therefore, we can use the following equation to determine the oxidation number of the sulfur atom:

Li + S + 4O = 0

2(+1) + S + (-8) = 0

S = +6

Therefore, the oxidation number of S is +6. The compound LiSO₄ doesn't exist, the correct formula is Li₂SO₄.

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