2Na + 2H2O → 2NaOH + H2

What is the total number of moles of hydrogen produced when 4 moles of sodium react completely?


A. 1 B. 2 C. 3 D. 4

Real gases behave most like ideal gases under conditions of high temperature and low pressure. Option 2 is correct.

This is because at high temperatures, the kinetic energy of gas molecules increases, causing them to move faster and collide more frequently, which reduces the intermolecular forces between the gas molecules. At low pressures, the gas molecules are farther apart and the intermolecular forces are weaker, allowing the gas molecules to move more freely and behave more like an ideal gas.

At high pressures and low temperatures, the gas molecules are closer together and the intermolecular forces are stronger, causing deviations from ideal gas behavior. Hence the correct option is 2.

To know more about ideal gas, here

brainly.com/question/28257995

#SPJ4

The correct response is D. Elements W and Z are metals, Elements X and Y are nonmetals, but Element Y is in Group 18 (noble gas).

A substance is considered to be an element if it cannot be chemically reduced to a simpler form. Every atom in an element has the same amount of protons in its atomic nucleus, and as such, the element is made up of identical atoms.

In general, elements in the same group of the periodic table exhibit comparable chemical and physical properties due to their similar electron configurations.

Option D proposes that Elements W and Z are metals, which frequently lose electrons to create positive ions and have poor electronegativity. In contrast, Elements X and Y are nonmetals, which tend to have strong electronegativity and tend to gain electrons to create negative ions. This grouping makes sense as metals and nonmetals have extremely different properties, and elements that are close each other in the periodic table tend to have different properties.

Noble gases are known for their unreactivity and non-reactive character due to their stable electron configurations, so this classification makes sense as well.

To know more about elements, visit:

https://brainly.com/question/13025901

#SPJ1

The electron transport chain (ETC) is an essential part of cellular respiration, which is a series of molecules that transfer electrons from one molecule to another used by cells to convert nutrients into energy.

This starts with the oxidation of molecules such as glucose, which releases electrons that are then transferred to a series of electron carriers in the ETC. The electron carriers are molecules that hold the electrons and can transfer them to other molecules which is known as redox reactions. As the electrons move through the ETC, they release energy which is used to form a proton gradient that is then used to drive the synthesis of ATP, the energy currency of the cell. The ETC is an essential part of cellular respiration as it is the process responsible for generating the energy necessary for cells to function.

To learn more about electron click here https://brainly.com/question/28977387

#SPJ4

The correct answer is that none of the substances listed actually speeds up the absorption of alcohol.

As the rate of alcohol absorption depends on various factors such as the amount of alcohol consumed, the rate of gastric emptying, and the presence of food in the stomach. However, carbonated water and starchy foods may help slow down the absorption of alcohol by delaying the emptying of the stomach, which can result in a slower increase in blood alcohol concentration. Meat products may also help in slowing down the absorption of alcohol due to their high protein content, which can reduce the rate of gastric emptying. Plain water, on the other hand, may actually dilute the alcohol content in the stomach but will not speed up its absorption. It is important to note that while these substances may help to delay the absorption of alcohol, they do not reduce its effects on the body or prevent intoxication. The only effective way to reduce the effects of alcohol is to consume it in moderation or to avoid it altogether. It is also important to never drink and drive, and to seek medical attention if one experiences severe symptoms of alcohol consumption.

To learn more about alcohol click the link below

brainly.com/question/30829120

#SPJ4

A spontaneous reaction under standard conditions is indicated by the value of K being greater than 1. Thus, the answer to the given question is option C, K = 2.2 x 10².

Standard conditions- Standard conditions are a set of environmental conditions that are considered to be the standard conditions for conducting an experiment. They serve as a reference point to compare the effects of varying environmental conditions on the properties of a substance or the results of an experiment.

Standard conditions in chemistry are considered to be a temperature of 298K (25°C), a pressure of 1 atm (101.3 kPa), and a concentration of 1 mol/L (for solutions).

Spontaneous reaction- A spontaneous reaction is one that proceeds without any external force or intervention. That is, a spontaneous reaction proceeds without the need for energy input from an external source. In other words, it is an exothermic reaction where the products are more stable than the reactants.

The Gibbs free energy change of a spontaneous reaction is negative. The sign of ΔG indicates the spontaneity of a reaction. A negative value indicates that the reaction is spontaneous, whereas a positive value indicates that the reaction is non-spontaneous. The value of ΔG° is used to determine the spontaneity of a reaction under standard conditions.

To learn more about "spontaneous reaction", visit: https://brainly.com/question/6843797

#SPJ11

The following 0.10 m solutions can be ranked from lowest to highest boiling point (bp) as:

ammonia < diethylamine < methylamine < t-butylamine.

The elevation in boiling point, ΔTb can be calculated using the expression;

ΔTb = Kb × bm

where ΔTb is the elevation in boiling point, Kb is the boiling point elevation constant, m is the molality of the solution.

For a given solvent, the boiling point elevation is directly proportional to the molality of the solute present, which means that the higher the molality of the solute, the higher the elevation in boiling point. Hence, we can rank the given solutions based on their molality.

The given solutions are all amines and they have the same formula NH₂R. The boiling point elevation constant is inversely proportional to the size of the molecule, which means that the smaller the molecule, the higher the boiling point elevation constant. Hence, the given amines can be ranked based on the size of their alkyl groups.

The order of the given amines based on the size of their alkyl groups is;

t-butylamine > diethylamine > methylamine > ammonia

The order of the given amines based on the boiling point elevation constant is;

ammonia > methylamine > diethylamine > t-butylamine

Ranking the given solutions based on their molality gives;

ammonia < diethylamine < methylamine < t-butylamine

Hence, the order of the given solutions from lowest to highest bp is;

ammonia < diethylamine < methylamine < t-butylamine

Learn more about boiling point here: https://brainly.com/question/40140.

#SPJ11

A 3.6102 M HI solution has a pH of 1.44. A 9.23102 M HClO4 solution has a pH of 0.036. The mass-based solution with 1.01% HCl has a pH of 2.09 in water.

The concentration of hydrogen ions (H+) in a solution determines the pH, which is a measurement of the solution's acidity or basicity. The pH values of various solutions are measured in the examples provided. Strong acids, HI and HClO4, are present in the first two solutions. Due to its lower pH, HI is a stronger acid than HClO4. The third solution, which comprises a combination of HClO4 and HCl and is weaker than the previous two because of its higher pH level, contains HCl. The pH of the final solution, which contains 1.01% HCl by mass, is 2.09, showing that it is a weak acid.

learn more about solution here:

https://brainly.com/question/30665317

#SPJ4

Actually, when atomic radius grows, electronegativity often decreases.

The capacity of an atom to draw electrons into a chemical connection is known as electronegativity. The separation between the nucleus and the farthest electrons grows with increasing atomic radius. As a result, the nucleus's attraction to the electrons is reduced, making it more challenging for the atom to draw electrons to itself. The electronegativity values of bigger atoms are therefore often lower than those of smaller ones. Despite this general tendency, there are certain outliers since electronegativity also depends on other elements including nuclear charge and electron configuration. For instance, the rising nuclear charge in halogens causes the electronegativity to rise as the atomic radius falls.

learn more about electronegativity here:

https://brainly.com/question/17762711

#SPJ4

Equilibrium is a state of balance in which the rates of forward and reverse reactions are equal, and energy is exchanged between the reactants and products. The Haber process is an example, where nitrogen and hydrogen gases react to form ammonia with the exchange of heat energy.

Increasing the temperature generally increases the rate of both the forward and reverse reactions, but the effect on the equilibrium constant depends on whether the reaction is exothermic or endothermic. For an exothermic reaction, increasing the temperature will shift the equilibrium towards the reactants, while for an endothermic reaction, increasing the temperature will shift the equilibrium towards the products.

Changing the concentration of a reactant can shift the equilibrium towards the products or the reactants, depending on whether the reactant is a reactant or a product in the balanced equation. If the concentration of a reactant is increased, the equilibrium will shift towards the products, and if the concentration of a product is increased, the equilibrium will shift towards the reactants, according to Le Chatelier's principle.

Learn more about Equilibrium here:

https://brainly.com/question/30807709

#SPJ1

The potassium tert-butoxide is final product of the reaction is (CH3)3COH.

Why potassium tert-butoxide is (CH3)3COH?

The product for the given reaction is (CH3)3COH.

Reaction: (CH3)3CBr + KOtBu →(CH3)3COH + KBr

Potassium tert-butoxide (KOtBu) is a strong base that can deprotonate hydrogen from (CH3)3COH to form (CH3)3CO-.On the other hand,

(CH3)3CBr is a tertiary halide that can undergo an E2 reaction.

E2 is the abbreviation for bimolecular elimination reactions,

which involve the abstraction of a proton from the adjacent carbon and the removal of the halide anion.

The hydrogen that is abstracted by KOtBu can only come from the carbon that is adjacent to the bromine in (CH3)3CBr, according to Saytzeff's rule, because this is the carbon with the least number of hydrogens.

As a result, an alkene intermediate will be formed.

The KBr salt will be the by-product.

The alkene intermediate, however, is not present in the end product because it is a reactive molecule and quickly reacts with any available hydrogen.

The hydrogen is provided by the KOtBu base.

As a result, the final product of the reaction is (CH3)3COH.

Learn more about potassium tert-butoxide

brainly.com/question/29484874

#SPJ11

Reduction involves the gain of electrons, and reactions for which the standard cell potential is negative are spontaneous under standard conditions.

Reduction- In a chemical reaction, the process of gaining one or more electrons is known as reduction. It is the opposite of oxidation, which is the loss of electrons in a reaction.

Reduction is the method of reducing the oxidation state of a substance. The reduction of carbon dioxide to glucose during photosynthesis is an example of a biological reduction. The reduction of iron oxides into elemental iron during the blast furnace process is an example of an industrial reduction.

To learn more about "reduction", visit: https://brainly.com/question/21851295

#SPJ11

The difference in electrochemical potential between two electrodes of an electrochemical cell is called as the cell potential.

The potential difference or voltage that exists between two electrodes in an electrochemical cell when no current is flowing through the cell is called the cell potential. Cell potential, also known as electromotive force (emf), is a measure of the driving force that drives a chemical reaction in an electrochemical cell forward.

The potential difference between the anode and cathode of an electrochemical cell is a quantitative measurement of the cell's capacity to generate electrical energy. The cell potential is usually measured in volts (V), and its sign is determined by the direction in which the electrons flow through the cell. When electrons flow spontaneously from the anode to the cathode, the cell potential is positive, whereas if electrons are forced to flow from the cathode to the anode, the cell potential is negative.

Learn more about Cell potential here:

https://brainly.com/question/1313684

#SPJ11

The balloon that is one size larger than the others serves to symbolise the area in a molecule inhabited by lone pairs of electrons, signifying unshared electron pairs in a particular region.

The Lewis structure is a chemical model that depicts how atoms and valence electrons are arranged in a molecule. The atoms are represented by symbols, and the valence electrons, which are the electrons at the highest energy level, are shown as dots or lines. In organic chemistry, the bigger balloon often designates a region of a molecule where electrons are not shared with any other atoms or groups. The structure and reactivity of the molecule are impacted by this region, which is referred to as a lone pair. The wider balloon makes it easier to see where these unshared electron pairs are located and how they affect the molecule's overall structure and behaviour.

learn more about lone pairs here:

https://brainly.com/question/30886923

#SPJ4

The complete ionic equation for the reaction that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed is as follows: 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → CuS(s) + 2 Li+(aq) + 2 NO3-(aq)

It is important to write the complete ionic equation when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed. The reaction of lithium sulfide with copper (II) nitrate is a double displacement reaction. Lithium sulfide reacts with copper (II) nitrate to form copper sulfide and lithium nitrate.

The balanced chemical equation for the reaction is given as follows:Li2S(aq) + Cu(NO3)2(aq) → CuS(s) + 2 LiNO3(aq)The complete ionic equation can be written by representing all the ions in the aqueous solutions as dissociated ions.

Thus, the complete ionic equation for the reaction that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed is as follows:2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → CuS(s) + 2 Li+(aq) + 2 NO3-(aq.

)In the above equation, the lithium and nitrate ions do not take part in the reaction and are present in the same form in the reactant and product side. Hence, they are called spectator ions.

To know more about ionic equation, refer here:

https://brainly.com/question/15138610#

#SPJ11

As sodium acetate is added to the solution, the sodium ions (Na+) will replace the hydrogen ions (H+) in the equation. This causes a shift in the equilibrium as the number of hydrogen ions (H+) decreases, while the number of acetate ions (CH3COO-) increases.

Sodium acetate is an ionic compound composed of Na⁺ and CH₃COO⁻ ions.

It dissociates in water to create these ions, which are then available to affect the dissociation of acetic acid.

The equilibrium of acetic acid dissociation is influenced by the addition of sodium acetate.

Acid dissociation equilibria are influenced by salt addition (usually sodium salts), particularly when the acid is weak.

This is due to the fact that the anion of the salt reacts with hydrogen ions from the acid's dissociation.

This decreases the concentration of hydrogen ions in the solution, causing the reaction to shift towards more dissociation.

Learn more about acid dissociation constant here:

https://brainly.com/question/3006391

#SPJ11

The number of moles of FADH₂ required to produce a proton gradient is 0.17 mol. This can be calculated through the free energy and potential difference. Thus, the correct option is D.

There are 6.022 × 10²³ protons per mole of H⁺. Therefore, one mole of H⁺ contains 1 mole of protons.

The change in potential between FADH₂ and O₂ is: ΔE°' = E°'(O₂) - E°'(FADH₂)

ΔE°' = 0.81 - 0.10

ΔE°' = 0.71 V

ΔG for electron transfer from FADH₂ to O₂ is: ΔG°' = -nFΔE°'

where, n = number of electrons, F = Faraday's constant (96,500 J/V), and ΔE°' is the change in potential between the two half-cells.

We know that n = 2 (since FADH₂ transfers two electrons to O₂).

ΔG°' = -2 × (96,500) × (0.71)

ΔG°' = -137,860 J/mol

ΔG° = -nFΔΨ

where, n = number of protons, F = Faraday's constant (96,500 J/V), and ΔΨ is the change in potential across the membrane. We know that n = 1 (since we want to pump one mole of H⁺ across the membrane).

ΔΨ = ΔG°/(nF)

ΔΨ = (-137,860)/(1 × 96,500)

ΔΨ = -1.43 V

ΔG = ΔG° + RTlnQ

where, R = gas constant (8.31 J/molK), T = temperature in Kelvin (298 K), and Q = reaction quotient.

Since the reaction is at standard conditions, Q = 1 (since all the reactants and products are in their standard states).

ΔG = ΔG°

ΔG = -137,860 J/mol

ΔG = -137.86 kJ/mol

23.3 kJ/mol = n × (1.43 V)

n = 0.17

Therefore, 0.17 mol of FADH₂ is required.

Therefore, the correct option is D.

Learn more about Potential difference here:

https://brainly.com/question/9358420

#SPJ11

The molecule which would have the highest boiling point is 2-methylhexane. Thus, the correct option will be D.

The boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure. The boiling point of a liquid is a measure of its vapor pressure. The higher the boiling point, the higher the vapor pressure of the liquid, and the more heat is required to vaporize it.

The boiling point of a substance is affected by the strength and types of intermolecular forces. The stronger the intermolecular forces, the higher the boiling point. 2-methylhexane has highest boiling point because it has the highest number of carbons and branches, which contribute to its strong intermolecular forces that lead to a higher boiling point.

Therefore, the correct option is D.

Learn more about Boiling point here:

https://brainly.com/question/25777663

#SPJ11

After 12 minutes, the amount of 2N-71 remaining would be 25 grams. This is because the half-life of 2N-71 is 2.4 minutes, meaning that after 2.4 minutes, half of the initial amount (50 grams) will remain. After 12 minutes, half of the remaining 25 grams will have decayed, leaving 25 grams.

The initial amount of 2n-71 is 50 g, and the half-life of 2n-71 is 2.4 minutes. We need to determine how many grams of 2n-71 would be left after 12 minutes. During radioactive decay, the amount of a radioactive substance decreases exponentially over time. The formula for determining the amount remaining of a radioactive substance after time t is:A = A₀(1/2)^(t/h)Where, A₀ = the initial amount of the substance,A = the amount of the substance after time t,h = the half-life of the substance, and t = time elapsedPlugging the given values in the formula, we get:A = 50(1/2)^(12/2.4)A = 50(1/2)^5A = 50(1/32)A = 1.5625Therefore, the amount of 2n-71 left after 12 minutes is 1.5625 g.

For more details follow this link: https://brainly.com/question/31108721

#SPJ11

The phenomenon in which electrons that are closer to the nucleus slightly repel those that are farther out is known as Shielding.

Electrons in an atom are negatively charged particles, and they are attracted to the positively charged nucleus. However, the outer electrons of an atom are also repelled by the inner electrons that are closer to the nucleus. This repulsion is due to the negative charges of the electrons, and it partially cancels out the attraction of the nucleus for the outer electrons.

Shielding is the phenomenon in which electrons that are closer to the nucleus slightly repel those that are farther out. This makes it possible for electrons in higher energy levels to be farther from the nucleus, so they are less strongly attracted and easier to remove.

Learn more about Shielding here: https://brainly.com/question/27985711

#SPJ11

Answer:

In general terms, because (1) the carbon-oxygen and hydrogen-oxygen bonds in ethanol are much more polar than any of the bonds in propane; (2) the oxygen atom in ethanol can form hydrogen bonds with the hydrogen atoms in water, but there is not such possibility with propane; and (3) propane contains more carbon atoms per molecule than ethanol.

Explanation:

In general terms, because (1) the carbon-oxygen and hydrogen-oxygen bonds in ethanol are much more polar than any of the bonds in propane; (2) the oxygen atom in ethanol can form hydrogen bonds with the hydrogen atoms in water, but there is not such possibility with propane; and (3) propane contains more carbon atoms per molecule than ethanol.

The pair of words or phrases that best completes the sentence "Isoelectronic species have radii that vary with ___even though they have the same number of ___." is "atomic number; electrons."

Explanation:

Isoelectronic species refers to atoms, molecules or ions having the same number of electrons but a different number of protons. They have identical electron configurations but different nuclear charges. As a result, they may have different ionic radii.

The ionization energy and electron affinity of isoelectronic species are identical, but the size of the atoms varies with the nuclear charge or atomic number. Atomic radius depends on the number of electrons and the nuclear charge. This is because the nuclear charge exerts an attractive force on the electrons in the outer shell that holds them in place.

The greater the nuclear charge, the smaller the atom.The pair of words or phrases that best completes the sentence is "atomic number; electrons." The number of electrons in the outermost shell of an atom determines its size. As we progress from left to right on a period, the number of electrons in the outer shell stays the same, but the nuclear charge increases.

This results in a decrease in size from left to right .Arranging isoelectronic species in a table shows that the radius of an ion is inversely proportional to the nuclear charge or atomic number.

To know more about Isoelectronic species refer here: https://brainly.com/question/30874804#
#SPJ11

Answer: A food chain shows what eats what.  A food web is made up of all the food chains in the ecosystems.

Explanation: Hope that helps!

Answer:

Explanation:

A food chain outlines who eats whom.

A food web is all of the food chains in an ecosystem.

The partial pressure of carbon dioxide on Venus is approximately 86.85 atmospheres.

If the atmospheric pressure on Venus is approximately 90 times greater than the pressure on Earth, and carbon dioxide makes up 96.5% of the Venusian atmosphere, we can calculate the partial pressure of carbon dioxide on Venus.

Let's assume the pressure on Earth is 1 atmosphere (atm). Then, the atmospheric pressure on Venus would be 90 atm.

To find the partial pressure of carbon dioxide on Venus, we multiply the total atmospheric pressure by the fraction of carbon dioxide in the atmosphere:

Partial pressure of carbon dioxide on Venus = Total atmospheric pressure on Venus * Fraction of carbon dioxide in the atmosphere

Partial pressure of carbon dioxide on Venus = 90 atm * (96.5 / 100)

Partial pressure of carbon dioxide on Venus = 90 atm * 0.965

Partial pressure of carbon dioxide on Venus ≈ 86.85 atm

Therefore, the partial pressure of carbon dioxide on Venus is approximately 86.85 atmospheres.

Learn more about partial pressures, here:

https://brainly.com/question/30114830

#SPJ12

The given figure is shown below:

Given figure from which shaft A is made of AISI 1020 hot-rolled steel, is welded to a fixed support and is subjected to loading by equal and opposite forces F via shaft B.

A theoretical stress-concentration factor Kts of 1.6 is induced by the 1/8" fillet. The length of shaft A from the fixed support to the connection at shaft B is 2 ft. The load F cycles from 150 t0 500 lbf. To find:

Factor of safety for infinite life using the modified Goodman fatigue failure criterion using the von Mises combined stress approach for shaft A.

Solution: The factor of safety for infinite life can be given by the following formula:

Factor of safety for infinite life= σ′ut1.5σ′a + σm

Here, σm = (σ1+σ2)/2= (800+400)/2= 600 psi

σa = (σ1-σ2)/2= (800-400)/2= 200 psi

σ′ut = σut/Kf= 64000/1.5 = 42666.67 psi

The alternating stress (σa) can be obtained as follows:

The force F can be given as,F= 150 + 350sin(πn/60) …(i)Where n is the rotational speed in rpm. For the given data, n= 1800 rpm.

Substituting the values, we get,

F= 150 + 350sin(π×1800/60)= 500 lb

Substituting the values of force and cross-sectional area of shaft A, we get,

σa= 4F/πd²= 4×500/π×0.25²= 4080 psi

Thus, substituting the above values in the formula of factor of safety, we get,

Factor of safety for infinite life= σ′ut1.5

σ′a + σm= 42666.67/1.5×4080 + 600= 4.23

Hence, the factor of safety for infinite life using the modified Goodman fatigue failure criterion using the von Mises combined stress approach for shaft A is 4.23.

To learn more about "von mises", visit: https://brainly.com/question/13440986

#SPJ11

The correct options for the radiations that would produce electrons with some kinetic energy in an experiment of the photoelectric effect are given below: Infrared, Ultraviolet, X-ray, Gamma ray, and Photoelectric effect.

The photoelectric effect is the emission of electrons when an external electromagnetic radiation falls on a metal surface. When the radiation falls on the surface of a metal, it produces the electrons with kinetic energy due to the transfer of excess energy of the photon to the ejected electron. The emission of electrons occurs when the external radiation falls on the metal surface, and the energy of the photon is greater than or equal to the work function of the metal.

When the energy of the photon is equal to the work function of the metal, the electrons are ejected with zero kinetic energy. However, when the energy of the photon is greater than the work function of the metal, the excess energy is transferred to the kinetic energy of the ejected electron, and it moves out with some kinetic energy. Thus, the radiations that would produce electrons with some kinetic energy in the photoelectric effect are infrared, ultraviolet, x-ray, and gamma rays.

Learn more about Photoelectric effect here:

https://brainly.com/question/9260704

#SPJ11

The reaction in the gas mixture will proceed non-spontaneously in the forward direction when the standard free energy change (∆G°) is positive or zero.

In chemical reactions, the term spontaneity refers to whether the reaction proceeds on its own or requires an input of energy to occur. When ∆G° is negative, a reaction is said to be spontaneous in the forward direction, meaning it occurs naturally without any external input of energy. When ∆G° is positive or zero, on the other hand, the reaction proceeds nonspontaneously in the forward direction.

In other words, the reaction requires energy input to proceed. The free energy change (∆G) of a reaction is related to its standard free energy change (∆G°) through the equation:

∆G = ∆G° + RT ln(Q)

where, R is the gas constant, T is the temperature in Kelvin, and Q is the reaction quotient.

If Q = 1, the reaction is at equilibrium and ∆G = ∆G°. If Q < 1, the reaction proceeds spontaneously in the forward direction (∆G < 0), and if Q > 1, the reaction proceeds spontaneously in the reverse direction (∆G > 0).

Learn more about Spontaneous reaction here:

https://brainly.com/question/13790391

#SPJ11

The complete radioactive decay equation is as follows:

234/92 → 4/2He + 230/90 Th

Radioactive decay is a several processes by which unstable nuclei emit subatomic particles and/or ionizing radiation and disintegrate into one or more smaller nuclei.

According to this question, uranium with the mass number 234 and atomic number 92 undergoes a radioactive decay as follows:

234/92 U → 4/2 He + 230/90 Th

Uranium-234 nuclei decay by alpha emission to thorium-230, except for the tiny fraction (parts per billion) of nuclei that undergo spontaneous fission.

Learn more about radioactive decay at: https://brainly.com/question/1770619

#SPJ1

The correct answer is option (c) Ti4+.

The species which are attracted to a magnetic field are known as paramagnetic species. If we talk about the given options, then we can see that there are only 3 species that are given. Out of these three, only Ti4+ is paramagnetic. How can we determine whether a species is paramagnetic or not? The species which contain unpaired electrons are paramagnetic in nature. If there are all paired electrons, then the species are diamagnetic. If we talk about Ti4+, then it contains 2 unpaired electrons, which makes it paramagnetic. This is the reason why the correct answer is Ti4+.In Ar, all the electrons are paired, which makes it diamagnetic. In O, there are 2 unpaired electrons, which makes it paramagnetic. How can we determine whether a species is paramagnetic or not? The species which contain unpaired electrons are paramagnetic in nature. If there are all paired electrons, then the species are diamagnetic.

Learn more about paramagnetic species at  brainly.com/question/29990302

#SPJ11

As the molar mass calculated is 24.90 g/mol, hence the gas is most likely to be NO.

The ratio between mass and the amount of substance of any sample is called molar mass.

To determine whether the gas is NO, NO2, or N2O5, we need to calculate the molar mass of the gas and compare it to the molar masses of these three possible gases.

n = PV/RT

Given, P = 760.0 mmHg, V = 250.0 mL = 0.2500 L, T = 17.00°C + 273.15 = 290.15 K, and R = 0.08206 L atm/mol K.

So, n = (760.0 mmHg)(0.2500 L)/(0.08206 L atm/mol K)(290.15 K) = 0.01003 mol

M = m/n

Given m = 0.2500 g.

M = 0.2500 g/0.01003 mol = 24.90 g/mol

Comparing this molar mass to the molar masses of NO (30.01 g/mol), NO2 (46.01 g/mol), and N2O5 (108.01 g/mol), we see that the gas is most likely NO.

To know more about molar mass, refer

https://brainly.com/question/837939

#SPJ1

Note: The question given on the portal is incomplete. Here is the complete question.

Question: A 250.0-mL flask contains 0.2500 g of a volatile oxide of nitrogen. The pressure in the flask is 760.0 mmHg at 17.00°C. Is the gas NO, NO2, or N2O5?

The green metal carbonate is decomposed according to the given equation: MCO₃(s) → MO(s) + CO₂(g)

What is molar mass of MCO₃?

The number of moles of CO₂(g) produced can be used to determine the number of moles of the green metal carbonate (MCO₃) that decomposed.0.222 g of CO₂ (g) represents 1 mol of CO₂ (g), since its molar mass is 44 g/mol.

Therefore,1 mol of MCO₃ will produce 1 mol of CO₂ (g) in the reaction. So, 0.222 g of CO₂ (g) corresponds to 1 mol of MCO₃.

Hence, the number of moles of MCO₃ is:

moles of MCO₃= mass/Molar

mass= 0.598 g/Molar mass of MCO₃

The molar mass of MCO₃ can be calculated using the following:

mass percent of MCO₃ = [(mass of M)/(molar mass of M)] × 100%molar mass of MCO₃ = mass of MCO₃/moles of MCO₃

By substituting the value of moles of MCO₃ and the mass of MCO₃ into the equation above, the molar mass of MCO₃ can be calculated.

molar mass of MCO₃= (mass of MCO₃) / (moles of MCO₃)

Finally, to determine the molar mass of metal M, subtract the molar mass of CO3 from the molar mass of MCO₃.

MCO₃ = 12.011 + 3(15.999) + M(55.845)

= 181.76 + 55.845MM

= 55.845 - 60.01MM

= -4.165

The molar mass of the metal M is 4.165 g/mol.

To summarize, the metal M is sodium (Na) and its molar mass is 4.165 g/mol.

To know more about molar mass:

brainly.com/question/23058220

#SPJ11