what happened to the ionization energy of hydrogen"H" when its electron affinity​

Answer:

5.6 m which is molarith this solution

Answer:

B. metamorphic

Explanation:

Rocks formed under high heat and pressure is essentially the definition of metamorphic rock :)

Answer:

Every sample of a given substance has identical intensive properties because every sample has the same composition

Answer:

Almost everything in our surroundings represent chemical change

Explanation:

●Rusting of iron in presence of moisture and oxygen.

●Burning of wood.

●Milk becoming curd.

●Formation of caramel from sugar by heating.

●Baking of cookies and cakes.

●Cooking any food.

●Acid-base reaction.

●Digestion of food.

Answer:

1) It gets slower the farther out they are.

2) The farther out you are from the sun the less gravitational pull you have, which makes it go slower as it orbits.

3) Gravity ;) :)

Explanation:

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1.) The four inner planets have slower orbits and the four outer planets have faster orbits.

2.) The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves.

3.) Gravity

The term conservation of mass means that mass in any system can neither be created nor destroyed but can be transformed from one state to another.

The law of conservation states that the mass in an isolated system can neither be created nor be destroyed but can be transformed from one form to another.

This means that when an element is involved in a chemical reaction, it's mass remains the same at the end of that reaction.

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Answer:

C) Solar Energy, i,e, Energy that comes from the sun

When (trans, trans)-hepta-3,5-dien-1-yne is reacted with Pd/C and H2, the product that is formed is (trans, trans)-hept-3-en-1-ol.

The reaction between the given compound and Pd/C and H2 undergoes catalytic hydrogenation or reduction. It is a type of chemical reaction in which an unsaturated bond present in a molecule is reduced by the addition of hydrogen gas (H2) with the help of a catalyst.

In this case, the given compound contains two triple bonds and no double bonds. So, it is known as diyne. When it is subjected to hydrogenation in the presence of a catalyst like Pd/C and H2, it undergoes hydrogenation and reduces its two triple bonds to double bonds. The two hydrogen atoms are added to each triple bond to form two single bonds.To write the balanced chemical equation for this reaction, we have:(trans, trans)-hepta-3,5-dien-1-yne + H2 (in presence of Pd/C) → (trans, trans)-hept-3-en-1-olHence, the final product formed when (trans, trans)-hepta-3,5-dien-1-yne is reacted with Pd/C and H2 is (trans, trans)-hept-3-en-1-ol.

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The molar heat capacity of a substance is the amount of heat needed to change the temperature of 1 mol of that substance by 1 K.

The molar heat capacity of a substance is a physical property that describes the amount of heat energy required to raise the temperature of one mole of the substance by one Kelvin (or one degree Celsius). It is typically denoted by the symbol Cm and has units of joules per mole per Kelvin (J/(mol K)).

The molar heat capacity of a substance depends on various factors such as the nature of the substance, its phase (solid, liquid, or gas), and the conditions under which the temperature change occurs (constant pressure or constant volume).

For example, the molar heat capacity of a gas at constant pressure is usually greater than its molar heat capacity at constant volume, because the gas is allowed to expand and do work on its surroundings at constant pressure, which requires additional energy input.

The molar heat capacity is an important property in thermodynamics and is used in many calculations involving heat transfer, energy conversion, and chemical reactions. It is also used to determine the specific heat capacity of a substance, which is the amount of heat energy required to raise the temperature of a unit mass of the substance by one Kelvin (or one degree Celsius).

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Answer:

Certain types of atoms are "radioactive," meaning that they will eventually decay, or "break down" into a different type of atom. In this activity, you will simulate radioactive decay by flipping coins. Coins that land tails-up "decay," and coins that land heads-up remain the same.

Explanation:

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Answer:

X = 2-propanol

Y = 2-chloropropane

Z = propene

Explanation:

Secondary alcohol is an alcohol in which the carbon that the functional group (OH group) is attached to is also attached to two alkyl group. Examples are 2-propanol and 2-butanol.

The secondary alcohol referred to in the question here is 2-propanol and it reacts with PCl₅ as seen below

H₃C-CH-CH₃ + PCl₅ ⇒ H₃C-CH-CH₃ + HCl + POCl₃

        |                                     |

       OH                                Cl

The alkylhalide produced there is 2-chloropropane. Thus, we can see that X is 2-propanol and  Y is 2-chloropropane.

When this 2-chloropropane undergoes dehydrohalogenation (removal of hydrogen and halogen) an alkene is formed. The reaction is seen below

H₃C-CH-CH₃   (-HCl)    ⇒  H₃C-CH=CH₂

        |

       Cl

The alkene produced (as seen above) is propene.

Confirmation: When propene undergoes ozonolysis, the compounds produced are ethanal and methanal as seen in the equation below

                                                   O

                                                 /    \

H₃C-CH=CH₂ + O₃  ⇒  H₃C - CH  CH₂    [-O]  ⇒ CH + CH₂  

                                                 ||     ||                     ||        ||

                                                O    O                    O      O

The final products as seen above are methanal and ethanal

Physical chemistry a  major branch of chemistry would be most concerned with studying a series of chemical reactions in order to measure the amount of heat being released in each one.

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(a) First, we need to write the combustion reaction for ethanol (CH3CH2OH)

CH3CH2OH + O2 → CO2 + H2O

Then, we need to balance this equation. To do that, remember to start with C, then move on to H and finally balanced the amount of O:

CH3CH2OH + 3 O2 → 2 CO2 + 3 H2O

(b) Since this is a reaction that realeases heat (726.7 kJ /mol of ethanol), we know that is an exothermic reaction and the general scope of an enthalpy diagram would be like this:

Where, for the combustion of ethanol, the reactants would be CH3CH2OH + O2, the products would be CO2 + H2O, and ΔH would be -726.7 kJ/mol

Answer:

D

Explanation:

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Producing hydrogen gas. Hence, option D is correct.

Electrolysis is described by two half-reactions. These half reaction are the oxidation half-reaction and reduction half-reaction.

Electrolysis involves the transfer of electrons. Each half reaction is characterized by the loss or gain of electrons.

The only reason why producing hydrogen gas is not used most of the time is because electrolysis has very low efficiency, most of the energy finishes up being converted to heat and 95% of the hydrogen is produced by steam reforming.

Hence, option D is correct.

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One of the hallmark treatments for shock is fluid replacement, and the nurse is aware of this. In order to treat acidosis, the crystalloid fluid that is commonly used is called lactated Ringer's solution.

Fluid replacement is a crucial aspect of managing shock, as it helps restore blood volume and improve tissue perfusion. The nurse recognizes the significance of fluid therapy in treating this condition. Acidosis, characterized by an imbalance in the body's pH levels, can be a complication of shock.

To address acidosis and restore the body's acid-base balance, a crystalloid fluid known as lactated Ringer's solution is commonly employed. Lactated Ringer's solution contains sodium, potassium, calcium, and lactate, which helps in correcting acidosis by providing bicarbonate precursors.

This fluid not only replenishes the intravascular volume but also aids in the restoration of pH levels, making it an appropriate choice for treating acidosis associated with shock.

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The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

The final temperature of the mixture is 22.3°C

Explanation:

Assuming that the 120 g substance at 80°C is water, final temperature of the mixture can be determined using the formula:

Heat lost = Heat gained

Heat = mc∆T where m is mass, c is specific heat capacity of water, and ∆T is the temperature change = Tfinal - Tinitial.

Let the final temperature be T

Heat lost = 120 × c × (T - 80)

Heat gained = 3000 × c × ( T - 20)

Equating the heat lost and heat gained

120 × c × -(T - 80) = 3000 × c × (T - 20)

9600 - 120T = 3000T - 60000

60000 + 9600 = 3000T + 120T

69600 = 3120T

T = 69600/3120

T = 22.3°C

Therefore, the final temperature of the mixture is 22.3°C

The oceans take in between 50 to 80 percent of the oxygen in the atmosphere. 50 to 80 percent of the oxygen produced on Earth, according to scientists, is produced in the ocean.

Oceanic plankton, which includes algae, floating plants, and some bacteria that can atmosphere, are responsible for the majority of this output. The tiniest photosynthetic organism on Earth is a specific species called Prochlorococcus.

The layer of gases that surrounds the planet and is held in place by Earth's gravity is known as the atmosphere or air. The atmosphere of Earth shields life on the planet by maintaining the pressure necessary for liquid water to exist on the surface, absorbing ultraviolet sun radiation, and warming the surface by retaining heat.

The chemical element with the letters O and the atomic number 8 is called oxygen.

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Answer: The law of conservation of mass states that mass is neither created or destroyed, so the combined mass of all the products after the reaction will be the same as the mass of all the reactants and never more, but since the flask is not closed, the gases produced from the reaction will move into the atmosphere and the product left behind , the solids and/or liquids, will be the only products that you’ll end up weighing, meaning it’ll be less weight than the original reactants. The reason I’m interchanging weight and mass is because although weight changes with gravity, so long as the gravitational force stays constant throughout the experiment, it’s pretty much the same.

Explanation:

Ernest Rutherford’s model of the atom, first proposed in 1911, is one of the most important discoveries in the history of science. This model of the atom was revolutionary, as it improved upon J.J. Thomson’s “plum pudding” model and established a new understanding of the structure of the atom.

Rutherford’s model of the atom proposed that the atom was composed of a small, positively charged nucleus surrounded by negatively charged electrons. This structure was in contrast to Thomson’s model, which proposed that the atom was a homogeneous “plum pudding” composed of positive and negative charges. Rutherford’s model also proposed that the electrons orbited the nucleus in a manner similar to the way planets orbit the sun in the solar system, although the electrons did not have set orbits.

Rutherford also established that the alpha-particles (helium nuclei) are four times as heavy as a hydrogen atom. This discovery was made through the famous Gold Foil Experiment, in which Rutherford and his team of scientists sent alpha particles through a thin sheet of gold foil. The results of this experiment led Rutherford to conclude that the atom was not homogeneous.

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To determine the formula of a hydrate, experimental data needed includes the mass of the hydrated and anhydrous compounds.

The process begins by measuring the mass of the hydrate before heating.

The hydrate is then heated to remove water molecules, leaving behind the anhydrous compound.

After heating, the mass of the anhydrous compound is measured.

The difference between the two masses is the mass of water lost.

Finally, using the molar masses of the anhydrous compound and water, you can calculate the mole ratio of water to the anhydrous compound, which is used to determine the formula of the hydrate.

Hence,  The formula of a hydrate is determined by obtaining experimental data on the masses of the hydrated and anhydrous compounds and calculating the mole ratio of water to the anhydrous compound.

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Answer:

15.64 moles

81.8% (3 s.f.)

Explanation:

Let's start by writing a balanced equation.

N₂ +H₂ → NH₃

To balance the equation, ensure that the number of atoms of each element is the same on both side of the arrow. On the left, we have 2 N atoms and only 1 N on the right. Thus, write '2' in front of NH₃ to balance the N.

N₂ +H₂ → 2NH₃

Now, balance the number of H atoms. Currently, there are 2 Hs on the left and 6 Hs on the right. To balance the equation, write a 3 in front of H₂.

N₂ +3H₂ → 2NH₃

The equation is now balanced.

\(\boxed{N₂ +3H₂ → 2NH₃}\)

Given that hydrogen is in excess, the number of moles of NH₃ is dependent on the number of moles of N₂, which is the limiting reactant.

The mole ratio of N₂ to NH₃ produced is 1: 2.

Thus with 7.82 mol of N₂,

number of moles of NH₃

= 2(7.82)

= 15.64 moles

This is the theoretical yield since the calculations were based from the chemical equation.

However, in reality, the percentage yield may not be 100% as some products are lost in the process.

\(\boxed{percentage \: yield = \frac{actual \: yield}{theoretical \: yield} \times 100\%}\)

∴ Percentage yield of NH₃

\( = \frac{12.8}{15.64} \times 100\%\)

= 81.8% (3 s.f.)

Answer:

When it decays, a radionuclide transforms into a different atom - a decay product. The atoms keep transforming to new decay products until they reach a stable state and are no longer radioactive. The majority of radionuclides only decay once before becoming stable.

The electron will move to 2nd energy level as n = 2

An energy level (also called an electron shell) is a fixed distance from the nucleus at which an electron can exist. Electrons are small, negatively charged particles in atoms that move around a central, positive nucleus. Energy levels are a bit like stair steps. The energy emitted at a particular transition is equal to the energy difference between the two energy levels.

E(n) = −1/n² × 13.6eV

For the given case,

λ = 410.2 nm

h = 6.62 × 10⁻³⁴ j h⁻¹

c = 3 × 10⁸

E = hc/λ

E =  6.62 × 10⁻³⁴× 3 × 10⁸/410.2 × 10⁻⁹

E = 0.048 × 10⁻¹⁷ joules

E = 2.99 eV

E = -13.6 1/n²

Since, n = 6

E =  -13.6 1/6²

E = -0.38 eV

ΔE = E₂ - E₁

2.99 = -0.38 - E

-3.37 = E

-3.37 = -13.6 1/n²

n = 2

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-506.9KJ is the enthalpy for the combustion of ethanol. It is a state function that is frequently employed in measurements of physical chemistry.

A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the internal energy of the system to the product of the volume and pressure of the system. It is a state function that is frequently employed in measurements of physical, chemical, and biological structures at constant pressure, which the sizable surrounding environment conveniently provides.

C\(_2\) H\(_5\) OH + 3O\(_2\) → 2CO\(_2\) + 3H\(_2\)O

ΔH= 2(-393.5)+3(-241.8)  + 277.7 + 3(241.8)

    = -787-723+277.7+725.4

    = -1510+ 1003.1

     = -506.9KJ

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The atmospheric sample contains nitrogen at 599 torr, oxygen at 154 torr, argon at 6 torr, and carbon dioxide. Assuming standard pressure, what is the partial pressure of carbon dioxide gas.

Given,P(N2) = 599 torrP(O2) = 154 torrP(Ar) = 6 torrP(CO2) = ?At standard pressure, P(total) = P(N2) + P(O2) + P(Ar) + P(CO2)P(total) = 1 atm = 760 torrP(CO2) = P(total) - P(N2) - P(O2) - P(Ar) = 760 - 599 - 154 - 6 = 1 torrTherefore, the partial pressure of carbon dioxide gas is 1 torr.Question 8) A sample of ammonia gas occupies 20.0 mL at 585 torr and 20.0 °C. If the volume of the gas is 50.0 mL at 50.0 °C, what is the pressure.

Given,V1 = 20.0 mLV2 = 50.0 mLT1 = 20.0 °C = 293 K (Kelvin temperature)T2 = 50.0 °C = 323 KVapor pressure of NH3 at 20.0 °C = 0.170 atmVapor pressure of NH3 at 50.0 °C = 0.623 atmUsing Charles's law,V1/T1 = V2/T2(20.0)/(293) = (50.0)/(323)20.0 × 323 = 50.0 × 29364.6 mL = 50.0 mLP1V1/T1 = P2V2/T2(585 torr)(20.0 mL)/(293 K) = P2(50.0 mL)/(323 K)P2 = (585 × 20.0 × 323)/(293 × 50.0)P2 = 424.2 torrTherefore, the pressure of the gas is 424.2 torr.

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Explanation:

to see how a change in a reactant concentration would affect the speed of the chemical reaction

Answer:

D.geothermal energy

Explanation:

The State of Nevada has abundant solar, wind, and biomass energy sources, but has more potential for geothermal energy production than any other state.

Answer:

In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products. You can't change one element into another in a chemical reaction — that happens in nuclear reactions.

Explanation:

Explanation:

Thus, reactions in which products can be converted to reactant is called Reversible reaction.