In addition to a beta particle, what is the other product of beta decay of 20681Tl? In addition to a beta particle, what is the other product of beta decay of ? 20680Hg 20279Au 21083Bi 20682Pb

Answer:

Period

Explanation:

I believe your answer should be period.

I hope it helps! Sorry if it didn’t… Have a great day!

Layla~

When large doses of zinc are consumed, the excess is excreted primarily via the urine. Zinc is filtered by the kidneys and eliminated from the body in the urine. So, B) is correct.

Zinc is an essential trace element that plays various roles in the body, including enzyme function, immune system support, and protein synthesis. However, excessive intake of zinc can lead to toxicity. In such cases, the body eliminates the excess zinc through the process of excretion.

The primary route of excretion for excess zinc is via the urine. After absorption from the digestive system, zinc enters the bloodstream and is distributed throughout the body. When the concentration of zinc in the blood exceeds the body's requirements, the excess zinc is filtered by the kidneys.

In the kidneys, the excess zinc is processed by the renal tubules, which are responsible for the reabsorption and excretion of substances. Most of the excess zinc is excreted into the urine, allowing it to be eliminated from the body. The kidneys regulate the concentration of zinc in the urine and adjust the excretion rate depending on the body's needs.

While a small portion of zinc can also be excreted through other routes such as sweat, feces, and expired air, the primary pathway for excreting excess zinc is the urine. The concentration of zinc in sweat is relatively low compared to urine, and the amount excreted through feces and expired air is minimal in comparison.

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Answer:

2

Explanation:

The upper mantle. It contains the asthenosphere and is part of the lithosphere and begins just beneath the crust and ends at the lower mantle.

Answer:

95F

Explanation:

First we convert these temperatures into °C:

77°F = 25°C

95°F = 35°C

280K = 6.85°C

300K = 26.85°C

When temperature increases, water molecules have a greater average kinetic energy ans are more likely to collide with each other.

Out of the 4 temperatures, only 95°F (35°C) is of a higher temperature than 30°C. Hence 95°F is the answer.

Moles of helium gas is 3.498 mol. and all the answer is given below.

Mole is a unit of measure used in chemistry to represent the amount of a substance. It is defined as the amount of a substance that contains as many elementary entities (atoms, molecules, ions, etc.) as there are atoms in 12 grams of carbon-12. This number is known as Avogadro’s number, and is equal to 6.022 x 10e23. The mole allows chemists to work with the mass of a substance in relation to the number of particles present.

a. Moles of helium gas = 14.0 g / 4.003 g/mol = 3.498 mol
b. Moles of nitrogen gas = 10.0 g / 28.014 g/mol = 0.357 mol
c. Partial pressure of helium gas = 3.498 mol * 0.0821 atm/mol = 0.288 atm
d. Partial pressure of nitrogen gas = 0.357 mol * 0.0821 atm/mol = 0.029 atm
e. Total pressure = 0.288 atm + 0.029 atm = 0.317 atm

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Mole(s) of KCL is needed to produce 0.963 moles of PbCl₂ is 0.482 mol

The mole is the unit of amount of substance in the worldwide machine of devices. the amount quantity of the substance is a measure of what number of standard entities of a given substance in an item or sample. The mole is defined as containing precisely 6.02214076×10²³ standard entities.

2KCl (aq) + Pb(NO₃)2 (aq) → 2KNO₃ (aq) + PbCl₂

2 MOL of KCl produced = 1 mol of PbCl₂

0.963 moles of KCl will produce = 1/2 × 0.963

                                                       = 0.4815 mol of PbCl₂

Three significant figures = 0.482 moles.

A mole corresponds to the mass of a substance that consists of 6.023 x 1023 particles of the substance. The mole is the SI unit for the quantity of a substance. 1 mol of carbon-12 has a mass of 12 grams and carries 6.022140857 x 1023 of carbon atoms (to 10 large figures).

The Avogadro number is called after the Italian scientist Amedeo Avogadro (1776–1856), who, in 1811, first proposed that the quantity of fuel at a given stress and temperature is proportional to the range of atoms or molecules regardless of the character of the gas.

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The difference in the boiling points of ammonia (\(NH_3\)) and phosphine (\(PH_3\)) can be best explained by the presence of hydrogen bonding in ammonia, which results in a higher boiling point compared to phosphine.

Ammonia has a nitrogen atom, which is more electronegative than the phosphorus atom in phosphine. This causes a larger dipole moment in the ammonia molecule, leading to stronger intermolecular forces due to the formation of hydrogen bonds between the nitrogen and hydrogen atoms in adjacent molecules. These stronger forces require more energy to break, resulting in a higher boiling point for ammonia.

  In contrast, phosphine lacks hydrogen bonding due to the lower electronegativity of phosphorus compared to nitrogen. Therefore, the intermolecular forces in phosphine are weaker, requiring less energy to break, and leading to a lower boiling point under standard conditions.

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Because boiling point is independent of liquid volume, the boiling point would not vary.

What is boiling point  ?

A liquid's boiling point changes depending on the pressure being applied; the normal boiling point is the temperature at which the vapor pressure is equal to the average atmospheric pressure at sea level (760 mm [29.92 inches] of mercury). Water boils at sea level at 100° C.

The temperature at which a liquid's vapor pressure equals the pressure around it and the liquid turns into a vapor is known as the boiling point of a substance

A liquid's boiling point varies depending on the atmospheric pressure in the area. The boiling point of a liquid is lower in a partial vacuum than it is at atmospheric pressure. A liquid's boiling point is lower under low pressure than it is under air pressure. As a result, water boils at 99.97 °C (211.95 °F) at sea level but at 93.4 °C (200.1 °F) at 1,905 m (6,250 ft) altitude under standard pressure. Various liquids will boil at different temperatures at a given pressure.

Because boiling point is independent of liquid volume, the boiling point would not vary.

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Answer:

0.5cm²

Explanation:

the volume is found by dividing the mass over the density

v=m/d

=7g/14g/cm²

=0.5cm²

i hope this helps

Answer:

\(\boxed {\boxed {\sf 0.5 \ or \ \frac {1}{2} \ cm^3}}\)

Explanation:

We are asked to find the volume of a solid given the density and mass. The formula for density is:

\(d= \frac {m}{v}\)

We know the solid's density is 14 grams per cubic centimeter and the mass is 7 grams.

Substitute the known values into the formula.

\(14 g/cm^3 = \frac{7 \ g}{v}\)

We are solving for the volume of the solid, so we must isolate the variable v. First, cross multiply. Multiply the first numerator by the second denominator, then the first denominator and second numerator.

\(\frac {14 g/cm^3}{1} = \frac{7 \ g}{v}\)

\(14 \ g/cm^3 * v= 7 \ g * 1\)

\(14 \ g/cm^3 * v= 7 \ g\)

Now the variable is being multiplied by 14 grams per cubic centimeters. The inverse operation of multiplication is division, so we divide both sides by 14 g/cm³.

\(\frac {14 \ g/cm^3 * v}{14 \ g/cm^3}= \frac {7 \ g }{14 \ g/cm^3}\)

\(v= \frac {7 \ g }{14 \ g/cm^3}\)

The units of grams cancel.

\(v= \frac {7 }{14 \ cm^3}\)

\(v= \frac {1}{2} \ cm^3\)

The volume of the solid is 1/2 or 0.5 cubic centimeters.

The mass of 2.9 mol of the given compound is 4854.89 g.

A mole can be specified as a standard unit that is used to determine a given count of particles. A mole can be used to evaluate a huge number of quantities of atoms, or molecules.

Given, the atomic mass of the X = 189.5

The atomic mass of Y = 197.6

The atomic mass of Z = 115.7

The molecular formula of the compound is X₁Y₄Z₆.

The mass of one mole or molar mass = 189.5 + 4 (197.6) + 6(115.7) = 1674

Given, the number of moles of X₁Y₄Z₆ = 2.9 mol

The mass of 2.9 moles of X₁Y₄Z₆ = 2.9 × 1674 = 4854.89 g

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The mass of hydrogen in one mole of aluminum hydroxide Al(OH)₃ is 3.03 g (Option D)

From the formula of Al(OH)₃, 1 mole consist of

We can determine the mass of hydrogen as follow:

Mole = mass / molar mass

Cross multiply

Mass = mole × molar mass

Mass of H = 3 × 1.01

ass of H = 3.03 g

Thus, the mass of hydrogen in the compound is 3.03 g

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Answer: 3.03g

Explanation:

Answer:

Medication

Explanation:

These pharmaceuticals can pollute our water and unintentionally expose us to the chemicals in these medications. Recent studies have found that medicines flushed down the drain can contaminate our lakes and streams, which can hurt fish and other aquatic wildlife, and end up in our drinking water.

The molecular formula and name of the acid would be \(C_4H_8O_2\) and butanoic acid respectively.

The number of moles of the alkanoic acid is 0.5 mol and the mass of the acid is 44g. We can use this information to determine the molar mass of the acid as follows:

Molar mass = mass/mole = 44/0.5 = 88 g/mol

The alkanoic acid with a molar mass of 88 g/mol is butanoic acid.

\(C_4H_8O_2\) = (12x4) + (1x8) + (16x2) = 88 g/mol

In other words, the name of the mono alkanoic acid is butanoic acid and the molecular formula is  \(C_4H_8O_2\).

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If 0.5 mol of mono-alkanoic acid weighs 44 g determine the molecular formula and the name of the acid​

"Anna should create illustrative logos." is the correct response.

Anna should create illustrative logos. Illustrative logos are logos that incorporate icons, symbols, and detailed illustrations to create visually attractive designs. These logos are popular because they can effectively convey a brand's message or story through visually appealing visuals.

Illustrative logos offer a wide range of possibilities in terms of design and style. They allow Anna to showcase her creativity and create unique and memorable logos for her clients. With detailed illustrations and carefully chosen icons or symbols, she can create logos that are visually appealing and communicate the brand's values, personality, or industry in a compelling way.

Furthermore, illustrative logos can be used across various mediums and applications. They can be easily scaled and adapted for different sizes, such as for websites, print materials, social media, and more. Their versatility makes them suitable for different industries and businesses, allowing Anna to cater to a diverse range of clients and design needs.

Overall, by creating illustrative logos, Anna can leverage her skills in icons, symbols, and illustration to produce visually appealing and versatile designs that effectively represent her clients' brands.

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Answer:

x+y = 12

Explanation:

shfb gfgjj ghjj dvgg ggggg ghggs ufac t g dgyyh

Answer:

D

Explanation:

beacause all the elements in period 3 has different valence electrons hence you look at the first element in period 3 is sodium which has a valence electron of 1 when you go across the period to the right their valence electron decreases to be negative

Answer:

D is the correct answer i hope this is correct

The balanced chemical equation for the reaction between nitric acid (HNO3) and calcium hydroxide (Ca(OH)2) is:

\(2 HNO_{3} + Ca(OH)_{2} → Ca(NO_{3} )_{2} + 2 H_{2} O\)

According to the equation, 1 mole of calcium hydroxide and 2 moles of nitric acid combine to form 1 mole of calcium nitrate. With the use of this knowledge, we can calculate how much calcium nitrate can be made from the specified quantity of calcium hydroxide.

First, we need to convert the mass of calcium hydroxide to moles:

\(7.65 g Ca(OH)_{2} × (1 mol Ca(OH)_{2} / 74.093 g Ca(OH)_{2} ) = 0.1033 mol Ca(OH)_{2}\)

Since the reaction proceeds with a 67.0% yield, we can calculate the actual amount of calcium nitrate produced:

\(0.1033 mol Ca(OH)_{2} × (2 mol HNO_{3} / 1 mol Ca(OH)x_{2} ) × (1 mol Ca(NO_{3} )2 / 2 mol HNO_{3} ) × 0.67 = 0.0347 mol Ca(NO_{3} )_{2}\)

Finally, we can convert the moles of calcium nitrate to grams:

\(0.0347 mol Ca(NO_{3} )_{2} × 164.088 g Ca(NO_{3} )_{2} /mol = 5.69 g Ca(NO_{3} )_{2}\)

Therefore, the mass of calcium nitrate produced is 5.69 grams.

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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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The pH of the resulting solution after adding NaOH is approximately 3.92.

To answer your question, let's first recall the Henderson-Hasselbalch equation:

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

In this case, formic acid (HCOOH) is the weak acid (HA) and sodium formate (HCOONa) is its conjugate base (A-).

The pKa for formic acid is 3.74.

Before adding NaOH, the initial concentrations of formic acid and sodium formate are both 1.00 M.

When you add 400 mL of 0.500 M NaOH, the moles of NaOH added are:

0.400 L × 0.500 mol/L = 0.200 mol NaOH reacts with formic acid, producing sodium formate:

HCOOH + NaOH → HCOONa + H2O

This reaction consumes 0.200 mol of formic acid and produces 0.200 mol of sodium formate.

The new concentrations can be calculated as follows:

[HCOOH] = (1.00 mol - 0.200 mol) / 1.00 L = 0.800 M

[HCOONa] = (1.00 mol + 0.200 mol) / 1.00 L = 1.20 M

Now, we can plug these values into the Henderson-Hasselbalch equation:

pH = 3.74 + log(1.20/0.800) = 3.74 + 0.1761 = 3.92

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20 one-dollar dollars were randomly distributed among 20 people, or 20 one-dollar bills were randomly divided among 10 entropy .

Compared to solids or liquids, gases possess higher entropies because of their chaotic mobility.This implies that entropy will alter during a process in which the quantity of gas molecules present changes.

Entropy increases as a substance transitions from a solid to a liquid to a gas, and by observing the phases of a reactants and products, you can determine if an entropy change was positive or negative.Entropy rises whenever the number of gas moles rises.

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The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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The heat content of a system is equal to the enthalpy only for a system that is at constant pressure.

The heat content of a system is also known as its internal energy, which is the sum of the kinetic and potential energies of all the particles in the system. Enthalpy, on the other hand, is the heat content of a system plus the work done by the system on its surroundings at a constant pressure. Therefore, for a system that is at constant pressure, the heat content or internal energy is equal to the enthalpy.

The reason for this is that at constant pressure, the only form of work done by the system on its surroundings is pressure-volume work, which can be expressed as PΔV. In other words, if the volume of the system changes, work is done on the surroundings or by the surroundings, and the enthalpy of the system changes. However, if the volume is constant, then no work is done, and the enthalpy change is equal to the heat content change.

This relationship is used extensively in chemical thermodynamics, where enthalpy changes are often measured calorimetrically at constant pressure. It is also useful in industrial applications, such as in power generation, where the enthalpy of the working fluid is an important parameter in determining the efficiency of the process.

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Answer:

A. Removing the H2O2 as it forms

Explanation:

Answer:

A. Removing the H2O2 as it forms

Explanation:

Explanation:

The percentage decrease in the amount of dissolved oxygen is 10%

Percent yield is the percent ratio of actual yield to the theoretical yield. It is calculated to be the experimental yield divided by theoretical yield multiplied by 100%. If the actual and theoretical yield ​are the same, the percent yield is 100%

In chemistry, yield is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.

From the graph,

The amount of dissolved oxygen at  15°C is 10 mg/L

The amount of dissolved oxygen at  20°C is 9 mg/L

The decrease in the amount of dissolved oxygen is 1mg/L

The percentage decrease = (1/10) × 100 = 10%

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Molarity of a KCL solution made by dissolving 28.4 g of KCL in a total volume of 500 ml is calculated as 0.7619 M KCL.

Mole is a unit of measurement used for chemical substance. Molarity is also known as the molar concentration of solution. It is the technique of calculating the amount of substance that a particular chemical solution contains.

As we know that the molar mass of KCl is 74.55 g/mol.

Hence, molarity = 28.4 g * 1 mol KCl /74.55 g * 1/500 mL * 1000 mL/1 L

Now, molarity = 0.7619 M KCl.

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Answer: here's the answer to your question

1.3 ×10¹ is the average reaction rate for O\(_2\) in this reaction N2(g) + O2(g) ⟶ 2NO(g).

What is rate of reaction?

The pace during which a chemical response takes place is known as the reaction rate and rate of reaction. It is proportional to the rise in product concentration per unit time and the fall in reactant concentration per unit time. Response times can differ wildly.

For instance, cellulose burns in a fire in a matter of seconds as opposed to the sluggish, years-long oxidative corrosion of iron that occurs under Earth's atmosphere. For the majority of reactions, the rate gets slower as it goes along. By tracking the concentration changes over time, one can calculate the pace of a reaction.

concentration of N\(_2\) =0.34/0.75=0.45M

concentration of O\(_2\) =0.34/0.75=0.45M

concentration of NO=1.2/0.75=1.6

Kc = [NO]²/ [ N\(_2\) ] × [ O\(_2\) ]

    =  [0.45]²/ [ 0.45 ] × [ 1.6 ]

    = 1.3 ×10¹

Therefore, 1.3 ×10¹ is the reaction rate.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

k Nishant

Explanation:

i think only chemical change

Answer:

chemical change release energy but physical change absorb energy