what is the net ionic equation when an aqueous solution of silver nitrate is added to an aqueous solution of sodium carbonate?

The answer is 30.4 min.

Solution:

For 7/8 decay

It will have 2 half-lives. In first half life it will remain 1/6 then after second half life it will remain 1/8 means decay = 1-8/8 = 7/8

So total time

= 15.2 * 2 = 30.4 min

A radioisotope is a radioactive isotope of an element. They can also be defined as unstable combinations of neutrons and protons, or atoms containing excess energy within the nucleus. For example, radioactive isotopes of radium, thorium, and uranium occur naturally in rocks and soils.

Uranium and Thorium are also present in water in trace amounts. Radon, produced by the radioactive decay of radium, is present in the air. An unstable form of a chemical element emits radiation as it decays and becomes more stable. Radioactive isotopes can occur naturally or can be created in a laboratory.

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44.44 grams of hydrogen are produced in this equation

This can be shown as :

Let's start by balancing the equation.

We can see that, as written, we have one oxygen coming in, but two (O2) on the product side.  

Let's try making it 2 H2O and see what happens:

That took care of the O's, but now we have two extra H's coming in.  So let's add a "2" to the H2 on the product side:

Now it is balanced.  4 hydrogens and 2 oxygens coming in, and 4 hydrogens and 2 oxygens going out.

Now we can calculate the amounts of both products.

We need to find the percent by mass of both hydrogen and oxygen in the water.

Since the formula for water is H2O, take the masses off of the periodic table: 2x1g for hydrogen (because there are 2 H in the formula); 1x 16g for oxygen (because there is 1 O in the formula), added together for a total of 18g.

Hydrogen’s Percentage is :

Oxygen's Percentage is :

Thus, Out of 50g of water, that makes 44.4g of Oxygen and 5.56 g of Hydrogen.

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'S' has more Molar Mass than 0.

Therefore easily say looking at molecule.

We can C₆H₁₃ SH has a higher Molar Mass.

C₆H₁₃OH has stronger Hydrogen Bonding interaction.

C₆H₁₃OH (High Boiling Point)

Molecular weight is the mass of a specific molecule and is measured in Daltons. exceptional molecules of the same compound could have special molecular weights because they comprise distinctive isotopes of the detail. The molar mass of a substance is the mass in grams of 1 mole of the substance.

The molar mass of a substance may be acquired through adding the molar loads of the atomic additives. The calculated molar mass can then be used to convert the mass and range of moles of the substance. Use the chemical method to locate the wide variety of atoms for every element inside the compound.

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Any time a charged particle, like an electron, modifies its velocity, electromagnetic radiation is created that is every time it accelerates or slows down. The charged particle loses the energy of the electromagnetic radiation that is subsequently created as a result.When an atom absorbs energy, it emits electromagnetic radiation.

One or more electrons in the atom move to a different location as a result of the energy being absorbed. An electromagnetic wave is created when the electron reposition itself.Atoms may absorb energy in a variety of ways. Electrical energy can be used as one method of atom excitation. Neon signs display this for you. The neon atoms will become excited or gain energy when we run electricity through the neon tubes.

In this state, the electrons in these atoms are very energetic. The electrons will return to their low energy state and emit radiation that we see as light since they don't enjoy being in the high energy state.

The electrical conduction is due to movement of free electron sea.

The valence electrons of metals that are close to one another do not only stay on their own atom, they move freely across the entire metal complex. Like a single water molecule floating freely in the sea, they appear to be floating through an ocean of electrons. It is known as the electron sea model for this reason.

Since each metal atom is free to move around, these atoms develop into positively charged cations. These cations are surrounded by a sea of negatively charged electrons, making them resemble a positively charged island. Metal is a good conductor of electricity because of these free-moving electrons.

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Wavelength of the photon of light and then relaxes back to the ground state by emitting an infrared photon (1,200 nm) followed by an orange photon (600 nm) that was absorbed initially is 400nm

Wavelength of the photon that was absorbed initially can be calculated as follows:

Photon's energy is inversely related to its wavelength.

E ∝ 1/λA

Given that the energy of the absorbed photon () equals the total energy of the photons released (E₁ +E₂).

Eₐ=E₁ +E₂

the relationship between E and λ,

1 =   1 + 1

λₐ    λ₁   λ₂

1 =          1        +       1      

λₐ    600x 10⁻⁹    1200x 10⁻⁹

λₐ = 400nm

Therefore, the wavelength of the absorbed photon is 400 nm.

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23.79 L/mol is the molar volume of ch4 gas under the conditions of temperature and pressure where its density is 0.674 g/l

molar mass of CH4= 16.04g/ ml

density of CH4 = 0.674 g/l

so molar volume of CH4= molar mass/ density

    molar volume of CH4= 23.79L/mol

A substance's (chemical element or chemical compound) molar volume, denoted by the symbol Vm, is the volume occupied by one mole of that material at a specific temperature and pressure. It is determined by dividing the molar mass (M) by the mass density (). The definition of standard temperature and pressure (STP) is 0oC (273.15K) and 1atm pressure. The volume of one mole of a gas at STP is known as the molar volume of a gas.

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In thermal equilibrium, the probability of an atom being in a particular state is determined by its statistical weight, which is determined by its energy.

At a given temperature, the statistical weight of a state is proportional to its Boltzmann factor, which is the exponential of the negative of the energy of the state divided by the temperature of the system. Therefore, the ratio of the probabilities of two states of an atom that are separated in energy by kt will be determined by the Boltzmann factors of those states. In general, the probability of a state with a lower energy will be higher than the probability of a state with a higher energy, because the Boltzmann factor is an exponential function that decreases as the energy increases.

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Answer:b

Explanation:

A calcium ion will have a positive charge when it loses an electron. If it loses 2 electrons, the calcium ion will have 18 electrons and a 2+ charge.

In order to meet its octet rule on what would eventually become the new valence shell, the calcium atom, which currently has two valence electrons, must lose both of them. Consequently, it has a 2+ charge. Calcium contains 20 protons but only 18 electrons since it lost two electrons. As a result, calcium has a charge of 2+, making it a positive ion. With 20 protons and 20 electrons, a neutral calcium atom easily loses two electrons. A cation with 20 protons, 18 electrons, and a 2+ charge is the consequence of this. It is represented by the formula Ca2+ and has the same number of electrons as atoms of argon, the previous noble gas.

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Difference between empirical and molecular formula :

Empirical formulas are the simplest form of formulas that we can write for a molecule while molecular formulas are the formulas showing the type of atoms and number of each atom connected in the molecule. Hence, the key difference between empirical and molecular formulas is that empirical formula only gives the simplest ratio of atom whereas molecular formula gives the exact number of each atom in a molecule. Furthermore, we cannot calculate the exact molecular mass using the empirical formula while we can get the exact molecular mass using the molecular formula.

As another important difference between empirical and molecular formulas, we can say that we can predict the type of atoms in ionic compounds and repeating unit in a polymer whereas we can predict the oxidation numbers of each atom, how they are going to react in a reaction, and the resulted products using molecular formulas.

Determination: To determine the empirical and molecular formulas, given the mass or percentage of the elements, you need to convert them to moles. This is because, remember, the formula of a compound tells us how many moles of each element there are in one mole of that compound.

What do you mean by empirical and molecular formula?

The empirical formula of a compound gives the simplest ratio of the number of different atoms present, whereas the molecular formula gives the actual number of each different atom present in a molecule. If the formula is simplified then it is an empirical formula. The molecular formula is commonly used and is a multiple of the empirical formula.

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The empirical formula for glucose is C6H12O6, while the molecular formula is C6H12O6.

What is molecular formula?

Molecular formula is a way of representing the chemical composition of a molecule by using chemical symbols and numerical subscripts. It is a notation consisting of the chemical element symbols and numbers that indicate the types and numbers of atoms present in a molecule. The subscripts are used to indicate the number of each type of atom present in the molecule. The molecular formula can provide important information about the structure, properties, reactivity, and other characteristics of a molecule.

The difference between empirical and molecular formulas is that the empirical formula is the simplest ratio of atoms that make up a compound, while the molecular formula is the actual number of atoms of each element that make up the compound. For example, the empirical formula for glucose is C6H12O6, while the molecular formula is C6H12O6.

To determine the empirical and molecular formulas from percent composition or mass spectrometry data, one must first calculate the moles of each element present in the compound. This is done by dividing the percent composition of each element by the molar mass of that element. Once the moles of each element present in the compound is determined, the empirical formula is calculated by dividing the moles of each element by the smallest number of moles of any element in the compound. The molecular formula can then be determined by multiplying the empirical formula by a whole number until the total number of atoms of each element in the compound is equal to the moles of each element present in the compound.

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3.278 x [tex]10^-4[/tex] M is the Molar solubility of [tex]SrF_2[/tex] in 1.0 x[tex]10^-^2[/tex] M  [[tex]Sr(NO_3)_2[/tex]]

The solubility of a substance is measured by the number of moles of the solute that dissolve in one liter of solution, or molar solubility.

Here provided, Ksp = 4.3 × [tex]10^-^9[/tex]

and the concentration of [[tex]Sr(NO_3)_2[/tex]] = [[tex]Sr^2^+[/tex]] = 1.0 x [tex]10^-^2[/tex]M

Ksp for decompositon of  [tex]SrF_2[/tex]

Ksp = [tex][Sr^2^+]^2[/tex] [tex][F^-]^2[/tex]

Therefore, 4.3×[tex]10^-^9[/tex] = (1.0 x [tex]10^-^2[/tex] M) x [tex](2x)^2[/tex]

[tex]4x^2[/tex] = ( 4.3×[tex]10^-^9[/tex] ) / (1.0 x [tex]10^-^2[/tex]  )  = 4.3 x 10-7

[tex]x^2[/tex] = (4.3 x [tex]10^-^7[/tex]) / 4 = 1.075 x [tex]10^-^7[/tex]

Therefore , x= 3.278 x [tex]10^-^4[/tex] M

So the molar solubility of the solution is 3.278 x [tex]10^-^4[/tex] M

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Complete question:

what is the molar solubility of  [tex]SrF_2[/tex]  (ksp = 4.3×10−9)  in the following substances?

a) 1.0x10^-2M Sr(NO3)2 Ksp=4.3x10^-9

The correct order for the amino acids is:

d. methionine

a. leucine

b. histidine

c. glycine

This order is determined by the sequence of nucleotides in the mRNA molecule, which is transcribed from the DNA template. The sequence of nucleotides in the mRNA molecule determines the sequence of amino acids in the protein that is synthesized during translation. The process of translation begins with the recruitment of a ribosome to the mRNA molecule, and the addition of a special amino acid called methionine to the growing protein chain. The ribosome then moves along the mRNA molecule, adding one amino acid at a time to the growing protein chain, in a sequence determined by the sequence of nucleotides in the mRNA molecule. In this case, the first amino acid added to the protein chain is methionine, followed by leucine, histidine, and glycine.

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The correct order for the amino acids is:

d. methionine

a. leucine

b. histidine

c. glycine

This order is determined by the sequence of nucleotides in the mRNA molecule, which is transcribed from the DNA template. The sequence of nucleotides in the mRNA molecule determines the sequence of amino acids in the protein that is synthesized during translation. The process of translation begins with the recruitment of a ribosome to the mRNA molecule, and the addition of a special amino acid called methionine to the growing protein chain. The ribosome then moves along the mRNA molecule, adding one amino acid at a time to the growing protein chain, in a sequence determined by the sequence of nucleotides in the mRNA molecule. In this case, the first amino acid added to the protein chain is methionine, followed by leucine, histidine, and glycine.

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Aqueous sodium bicarbonate was used to wash the crude n-butyl bromide, the purpose of this wash is to completely neutralize the product or to remove the excess acid present in the product.

The reaction between the acid and sodium bicarbonate produces carbonic acid, which rapidly dissociates into carbon dioxide gas and water.

Now, in this reaction, we still have trace amounts of HBr in the product, therefore in order to neutralize these traces, we wash the solution with sodium bicarbonate, which results in the formation of sodium bromide and carbonic acid as described below:

    HBr + Na₂CO₃ → NaBr + Na₂CO₃

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The heat is absorbed when a 10 gram piece of platinum is warmed from 100 c to 150 c is 66.5 J

Energy is a sort of heat. Heat changes the condition of a substance when it is absorbed by it by weakening and rupturing the inter-particle bonds (solid to liquid for example). A phase change brought on by heat is NOT enough to raise the temperature. A reaction that absorbs heat is called endothermic.

The bulk of the body affects how much heat is absorbed. The bulk of the body directly affects how much heat energy is absorbed. where M is the body's mass and Q is the quantity of heat absorbed.

Using the equation H=cpmT and the water specific heat, the amount of heat absorbed is computed.

Given,

heat of slid platinum = 0.133

150 -100=50

heat absorbed = 0.133*10*50

= 66.5 J

Therefore , The heat is absorbed when a 10 gram piece of platinum is warmed from 100 c to 150 c is 66.5 J

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The lewis acid in the following reaction: hg2+(aq)+4cn−(aq)⇌hg(cn)42−(aq) will be hg2+.

A chemical species known as a Lewis acid has an empty orbital that could also accept a pair of electrons from a Lewis base to produce a Lewis adduct.

The given equation is :

hg2+(aq)+4cn−(aq)⇌hg(cn)42−(aq)

In the above equation, hg2+ will be work as Lewis acid. Any acid that serves as an electron pair acceptor would be a Lewis acid. Any base that can donate an electron pair would be a Lewis base.

A species known as Lewis Acid will have unoccupied orbitals as well as it will receive an electron pair, making it an electrophile. In the available possibilities, hg2+ possesses an empty orbital that can receive an electron lone pair and is a potent electrophile. It is therefore a Lewis acid. The remaining three molecules, cn− are Lewis bases since they only have one electron.

Therefore, the Lewis acid will be hg2+.

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50.79 mL  of 0.2300 m NaOH solution would be needed to reach a magenta phenolphthalein endpoint when titrating with 45.00 ml of 0.2596 m hcl solution

The reaction is given as :

HCl + NaOH = NaCl + H2O

We will use the formula : M1V1 = M2V2

M1 = 0.2596 M

V1 = 45.00 mL

M2 = 0.2300 M

putting values :

0.2596 M x 45.00 mL = 0.2300 M x V2

V2 = 50.79 mL

So volume of NaOH solution = 50.79 mL

A full neutralization process that solution in a pink phenolphthalein requires equimolar concentrations of both NaOH and HCl solutions.

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Option B, Because only a tiny percentage isotopes of oxygen atoms contain two additional neutrons, giving them an atomic weight of 18, "heavy" oxygen is distinguished from regular oxygen by the term.

Normal oxygen has 8 protons and, in its most prevalent form, 8 neutrons, giving it an atomic weight of 16; this type of oxygen is referred to as "light" oxygen. The isotopes amount of neutrons in the nuclei of oxygen-16 and oxygen-18 are different. While isotopes oxygen-18 contains 10 neutrons, oxygen-16 only has 8. Protons and electrons are equal between isotopes  oxygen-16 and oxygen-18. Since protons and neutrons both have mass, the mass of oxygen isotopes may be altered by altering the neutron content.

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0 degrees Celsius or one atmosphere are considered the norms for both temperature and pressure.A molar gas volume in STP is 22.4 liters / mole, according to what is reported.

We find that temperature and pressure are linearly related, and if the temperature is on the kelvin scale, then P and T are directly proportional (again, when volume and moles of gas are held constant).

As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.

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With repeated usage, morphine may develop a habit. Follow the morphine instructions precisely. Do not take it in larger amounts, more frequently, or otherwise differently than prescribed by your doctor.

Discuss your pain management objectives, course of treatment, and additional pain management options with your healthcare practitioner while you are taking morphine . Inform your doctor if you or any family members regularly use significant amounts of alcohol, take street drugs, abuse prescription medicines excessively, experience overdosing, or currently suffer from depression or another mental disorder. If you now use or formerly used morphine, there is a higher chance that you may abuse it.

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molar solubility of PbBr2 in 0. 500 M KBr solution is 4S3 = 6.60 x 10–6 . PbBr2 ionizes as Pb2+ + 2Br-, molar solubility of PbBr2 in a 0. 500 M Pb(NO3)2 solution is 0.0181 moles/lit..

If molar solubility of PbBr2 is “S”, then solubility of Pb2+ is also “S” but that of Br- would be “2S”. Ksp = [Pb2+] [Br-]2 = (S) (2S)2 = 4S3 = 6.60 x 10–6 4S3 = 6.6 x 10–6,this gives Solubility S = 1.181 x 10–2 = 0.0181 moles/lit. solid's solubility (usually referred to as its molar solubility) is expressed as the concentration of the "dissolved solid" in a saturated solution. This would simply be the concentration of Ag+ or Cl- in the saturated solution for a simple 1:1 solid like AgCl. The other way to express solubility is through molar solubility, which is defined below. It is the number of moles of solute in one litre of saturated solution and is abbreviated with a lower case's'. It is expressed in moles per litre, also known as molarity.

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Answer:

c

Explanation:latitude,longitude

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore,  the concentration of the phosphoric acid is 0.217M.

Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

According to the neutralization law,

M₁V₁=M₂V₂

where,

M₁ = molarity of stock solution = 0.5 mol/L

V₁ = volume of stock solution =  55.5 mL

M₂ = molarity of dilute solution =?

V₂ = volume of dilute solution = 127.5 mL

substituting all the given values we get

M₁V₁=M₂V₂

0.5 ×55.5 =M×127.5

M=0.217M

Therefore,  the concentration of the phosphoric acid is 0.217M.

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structure of the principal organic product formed by the free-radical bromination of methylcyclopentane. is the major product is formed by the substitution of Br radical on tertiry carbon.

In the presence of UV light, 1-Methylcyclopentane reacts with Bromine molecules. This type of reaction is known as a free radical reaction. Bromine will first become a bromine free radical and then attack the desired carbon to produce the desired product. Organic products are grown in an agricultural system that does not use chemical fertilisers or pesticides and takes an environmentally and socially responsible approach. Atoms or groups of atoms with a single unpaired electron are referred to as free radicals. These radicals are involved in a free radical substitution reaction. When a bond splits evenly, each atom receives one of the two electrons, and free radicals form. This is referred to as homolytic fission.

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The separation of the two component become more easy if the differ by at least because fractional distillation is a boiling point based separation method.

The fractional distillation is a process in which two liquid are separated from a mixture by using the difference in their boiling point as a main characteristic.

If the temperature of the two liquid for the two components is differing by at least 20 degree then fractional distillation can be accomplished more easily because it will become easier for us to separate the two components.

Because one of the component can be separated much earlier without wearing about the evaporation of the Other compound. The big difference in the boiling point makes the process of separation much easier.

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Non-biological methods of metal extraction relate to the various techniques used to recover metals from underground deposits. Microorganisms are used in biological processes, commonly referred to as biomining.

There are three primary techniques for removing metals from their ore. These include reducing the ore with carbon, electrolyzing the molten ore, and reducing it with a more reactive metal.

There are two different kinds of extraction: solvent extraction, often known as liquid-liquid extraction, and solid-liquid extraction. The separation of chemicals based on their relative solubilities in two separate immiscible liquids or solid matter compounds underlies both methods of extraction.

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Temperature will the vapor pressure be 7.00 times higher than it was at 307 k is 324 K.

Calculation :

Given Data:

Heat of vaporization = 66.64kJ/mol

Final vapor pressure = 4 times of initial vapor pressure

Initial temperature = 307 K

The temperature is calculated by using the Clausius Clapeyron equation:

ln(P1/P2)=ΔHvap/R(1/T2−1/T1)

ln(P1/4P1)=66640Jmol⁻¹/8.314Jmol⁻¹K⁻¹(1/T2−1/307K)

ln(1/4)=8015.4(1/T2−1/307)

−1.38=8015.4/T2(−26.108)

T2=324K

Therefore, the temperature is 324 K.

Thermometers are calibrated at different temperature scales and have historically relied on different reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (previously called Celsius), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter mostly used for scientific purposes. will be Kelvin is one of the seven basic units of the International System of Units (SI).

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The arrangement of this isoelectronic series in order of decreasing radius will be as O⁻², F⁻, Na⁺, Mg⁺²

The total number of electrons in each of these elements is 10, although the number of protons in each differs.

O⁻² = 8 protons

F⁻ = 9 protons

Na⁺ = 11 protons

Mg⁺² = 12 protons

Therefore, we can observe that the highest amount of protons in Mg⁺² are attracting the same quantity of electrons, and as a result, this ion has the shortest radius. (since there is a strong attraction force, the radius decreases).

O⁻² has the biggest radius because the fewest number of protons attract the same number of electrons.

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Answer is zeroth-order, A straight line with a slope of k represents a first-order reaction when the natural logarithm of the reactant concentration vs time is shown. zeroth-orderis the ideal choice.

The plot of [A] vs time for a zero order reaction, as illustrated, is a straight line with k = - slope of the line. For the initial order. A plot of the concentration of any reactant against time for a zeroth-order reaction is a line with a slope of k. A straight line with a slope of k represents a zeroth-order reaction when the natural logarithm of the reactant concentration vs time is shown.

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I held the magnesium ribbon over the flame produced by the bunsen burner using a pair of tongs.