TRUE/FALSEchlorophyll is in chloroplast which is located in the mesophyll of leaves

Answer:

2N2H2SO4

Explanation:

this is your answer calculate

Answer:

The charge of an element is equal to the number of protons minus the number of electrons. The number of protons is equal to the atomic number of the element given in the periodic table. The number of electrons is equal to the atomic number minus the charge of the atom.

Explanation:

The general name for the class of products formed in an Aldol condensation reaction is "β-hydroxy carbonyl compound."

Aldol condensation is a reaction that involves the condensation of two carbonyl compounds, typically an aldehyde and a ketone, to form a β-hydroxy carbonyl compound. The reaction occurs under basic or acidic conditions and involves the nucleophilic addition of the enolate ion (formed from one of the carbonyl compounds) to the carbonyl group of the other compound. This results in the formation of a new carbon-carbon bond and the introduction of a hydroxyl group (OH) at the β-position to the carbonyl group.

The term "aldol" comes from the combination of "aldehyde" and "alcohol" since the reaction leads to the formation of a compound with both aldehyde and alcohol functionalities. The resulting product is a β-hydroxy carbonyl compound, where the hydroxyl group is attached to the β-carbon (the carbon adjacent to the carbonyl carbon).

Therefore, among the given options, the correct general name for the class of products formed in an Aldol condensation reaction is "β-hydroxy carbonyl compound."

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The particle that makes the atom an unstable isotope is the neutron. When there is an excess or a deficiency of neutrons in an atom's nucleus, it becomes an unstable isotope.

Unstable isotopes are isotopes that decay and emit radiation until they reach a stable state. They are also known as radioactive isotopes. The radioactive isotopes are unstable and have an unpredictable lifespan because they have an unstable ratio of neutrons to protons. This excess of neutrons in the nucleus results in a greater electrostatic repulsion between protons, causing instability and eventually decay.Neutrons are the particles that are responsible for making atoms unstable isotopes. The excess or deficiency of neutrons in an atom's nucleus leads to an unstable state and eventually decay. Radioactive isotopes are important for various practical applications such as nuclear power, radiography, and cancer treatment.

Therefore, neutrons makes the atom an unstable isotope. The decay of unstable isotopes can be used for many practical applications such as nuclear power, radiography, and cancer treatment.

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The enthalpy change for the reaction of decomposing 2 moles of liquid water into 2 moles of gaseous hydrogen and 1 mole of gaseous oxygen is -285.83 kJ.

Given the following reactions and enthalpy changes:

\(H_2O\) (l) → \(H_2O\) (g) ΔH = 44.01 kJ

2\(H_2\) (g) + \(O_2\) (g) → 2\(H_2O\) (g) ΔH = -483.64 kJ

We want to find the enthalpy change for the reaction:

2\(H_2O\) (l) → 2\(H_2\) (g) + \(O_2\) (g)

To do this, we can use the following steps:

Reverse the first equation and change the sign of ΔH:

\(H_2O\) (g) → \(H_2O\) (l) ΔH = -44.01 kJ

Multiply the second equation by 1/2:

\(H_2\) (g) + 1/2 \(O_2\) (g) → \(H_2O\) (g) ΔH = -241.82 kJ

Add the two equations together, canceling out the \(H_2O\) (g) on both sides:

2\(H_2\) (g) + \(O_2\) (g) → 2\(H_2\) (g) + \(O_2\) (g) ΔH = -285.83 kJ

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The question is -

What is the enthalpy change for the reaction of decomposing 2 moles of liquid water into 2 moles of gaseous hydrogen and 1 mole of gaseous oxygen, given the following reactions and enthalpy changes:

H2O (l) → H2O (g) ΔH = 44.01 kJ

2H2 (g) + O2 (g) → 2H2O (g) ΔH = -483.64 kJ

Answer:

uhm

Explanation:

The space left by the free electron in an atom after it has lost one electron is known as a hole.

The term "free electron" refers to an electron that has broken loose from its "parent" atom and is now free to move about the material at random. A vacancy, also known as a hole, is created in the atom when a bonded electron in a lattice atom breaks free. The number of electrons in an atom's valence shell, or n shell in this example, has a significant impact on the electrical properties of the element that the atom represents. The least force of attraction is felt by the electrons in the valence shell since they are the furthest from their nucleus.

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Answer:

2 moles of hydrogen gas reacts with 1 mole of oxygen gas to yield 2 moles of water. 4 grams of hydrogen gas reacts with 32 grams of oxygen gas to yield 36 grams of water. Oxygen gas is insufficient since it is only 4 grams. This means that all oxygen gas will react to a proportionate amount of hydrogen to form water.

Explanation:

BORK BORK Hope this helps <3

CAN I HAVE BEPIS

Answer:

Dissolved minerals in the ground water precipitate (crystallize) from water in the pore spaces forming mineral crusts on the sedimentary grains, gradually cementing the sediments, thus forming a rock

Explanation:

In the first image the compound reacting with N₂ is LiF because F has the valency of -1. The second reaction with N₂ is the reaction with CeCl, where the oxidation state of Ce is +1. The products of the given reactions are BaSO₄ because, Ba and sulphate group both have a valency of 2.

Oxidation state of an element is the number of electrons it can lose or gain in a reaction. Halogens are having 7 valence electrons and they have to gain one electron to attain octet. Hence, their oxidation state is being -1.

In the first reaction N₂ is reacting with LiF, where Li has the oxidation number of + 1 by giving an electron to F.

In the second reaction the element with Cl is cesium and not strontium. Cesium metal loses one electron to Cl forming its +1 oxidation state.

For the third reaction , barium chloride and magnesium sulphate forms the products BaSO₄ and MgCl₂. Where the formula of barium sulphate is BaSO₄ because, both Ba and sulphate group has the oxidation number of 2.

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Answer:

S2H8

Explanation:

Although it might not occur possibly, we can write the formula for disulphur octahydride

We have two elements here, sulphur and hydrogen

The multiplicity of the sulphur is di while that of the hydrogen is octa

So the formula we are looking at here is S2H8

Experimental social psychologists face a major ethical dilemma concerning the potential harm or discomfort caused to participants during research studies.

Research in experimental social psychology often involves manipulating variables or creating scenarios that can evoke negative emotions, induce stress, or compromise privacy.

This raises concerns about the well-being and rights of participants. While researchers strive to gather valuable insights into human behavior, they must carefully balance the benefits of knowledge with the potential risks and ethical implications of their studies.

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The odd one among the options listed is golf because it is not an element (option D).

Chemical elements in chemistry are one of the simplest chemical substances that cannot be decomposed in a chemical reaction.

Chemical elements consist of atoms which have the same number of protons. The chemical elements are arranged on the periodic table in accordance with their atomic numbers.

There are a total number of 118 chemical elements in nature. The periodic table uses abbreviated chemical symbols in place of full element names, for example, Copper is symbolized using Cu while pottasium is symbolized using K.

Golf is a ball game played by individuals competing against one another in which the object is to hit a ball into each of a series of (usually 18 or nine) holes in the minimum number of strokes.

Golf is a sport, hence, is the odd one among the other options which are chemical elements.

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Answer:

Debido al descubrimiento de protones, neutrones y electrones.

Explicación:

La teoría de Demócrito fue reemplazada por la teoría de Dalton y luego la teoría de Dalton fue reemplazada por la de Rutherford debido al descubrimiento de protones, neutrones y electrones que están presentes dentro del átomo. Demócrito afirma que el átomo es una partícula indivisible de materia, pero el descubrimiento del protón, el neutrón y el electrón cambió este concepto de átomo, por lo que debido al mayor descubrimiento y estudio del átomo y sus partículas subatómicas, las teorías cambiaron con el paso del tiempo.

Answer:

proton

Explanation:

"Proton: A positively charged particle found in the nucleus of an atom. A proton contributes one atomic mass unit to the total atomic weight of an atom" this is definition per Google search

Answer:

process of depositing a thin layer of any superior metal over an object of a cheaper metal, with the help of electric current

Explanation:

I hope this help have an great day and stay health

Answer:

copper is the only material composed of a single pure substance

Explanation:

plss mark brainliest

Answer:

1st opt.

(copper is the only material consisting of a single pure substance)

Explanation:

an element is made up of only one type of atom, and copper (Cu) as you can see is a single pure atom whereas salt (NaCl) and vinegar (C2H4O2) are both made of different elements.

Hope this helps

Answer:

TRIPLE COVALENT BOND

Explanation:

Each nitrogen atom needs 3 more electrons, so they share 3 pairs of electrons between the two nitrogen atoms

A nitrogen atom can fill its octet by sharing three electrons with another nitrogen atom, forming three covalent bonds, a so-called triple bond. The triple bond formation of nitrogen is shown in the following figure.

Image result for triple bond in nitrogen

Answer:

2.18 grams of Br2 reacts to produce 3.25 grams of KBr

Explanation:

The balanced equation is

2 KI + Br2 → 2 KBr + I2

2 moles of KI and 1 mole of Br2 reacts to produce two molecules of KBr

Mass of two moles of KI = 2 * 166 grams

Mass of one mole of Br2 = 159.808 grams

Mass of two moles of KBr = 2* 119 grams

Thus,  159.808 grams of Br2 reacts to produce 2* 119 grams of KBr

2.18 grams of Br2 reacts to produce {(2* 119)/ 159.808} * 2.18 grams of KBr

2.18 grams of Br2 reacts to produce 3.25 grams of KBr

A sample of gas occupies a volume of 70.3 ml as it expands, it does 140.6 j of work on its surroundings at a constant pressure of 783 torr and the final volume of the gas is 11.12L

A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container and even in the presence of gravity and regardless of the amount of substance in the container

Here given data is 11.12L

V₁ = Initial volume = 70.3 ml = 0.0703ml =  (1L=1000ml)

w = 140.6 J = 1.387 J = (1Latm=101.3J)

Pressure =  783 torr = 1.03 atm  = (1atm=760 torr)

V₂ = final volume = ?

1.387Latm = 1.03 atm × (V₂ - 0.0703ml)

(V₂ - 0.0703ml) = 11.05

V₂ = 11.12L

The final volume of the gas is 11.12L

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To determine the temperature at which the KCl solution with 4.0 g of KCl and 10 mL of water precipitates, solubility data or further experimental information regarding the solubility of KCl at different temperatures would be required.

To determine the temperature at which the solution with 4.0 g of KCl (potassium chloride) and 10 mL of water (H2O) precipitates, we need more information about the solubility of KCl at different temperatures. Solubility refers to the maximum amount of solute that can dissolve in a solvent at a given temperature.

The solubility of KCl generally increases with temperature. However, without knowing the specific solubility data for KCl, it is challenging to determine the exact temperature at which precipitation occurs.

To obtain accurate solubility data, we would typically refer to solubility tables or conduct experiments to measure the solubility of KCl at different temperatures.

Assuming the KCl concentration in the given solution exceeds its solubility at a specific temperature, precipitation would occur. However, without the solubility information, we cannot determine the precise temperature.

Therefore, to determine the temperature at which the KCl solution with 4.0 g of KCl and 10 mL of water precipitates, solubility data or further experimental information regarding the solubility of KCl at different temperatures would be required.

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Answer:

Explanation:Well most scientists used microscopes but they also looked at bigger ones so the answer would be “by running experiments that expose there properties”

Ethanol, propanol, and methanol are three simple alcohols. They can be grouped together because they all share the same hydroxyl group.

A hydroxyl group is a functional group consisting of an oxygen atom that is covalently bonded to a hydrogen atom. The oxygen atom consists of two lone pair of electrons. Hydroxyl group is chemically represented as -OH.

Alcohols, Sugar and carboxylic acids usually contain hydroxyl groups. All the alcohol have the same functional group which is why they are represented by the formula ROH. Here R is an alkyl group and OH is a hydroxyl group.

Alcohols are formed when this group is added to an organic compound.

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Planck resolved the flaw by proposing that energy could only be emitted in discrete quantities, called quanta.

Max Planck was a German physicist who was working on the problem of how the electromagnetic radiation emitted by a black body, that was surrounded by a cavity, changed with temperature.

He was trying to explain the shape of the blackbody spectrum. When he observed the radiation from a black body, he noticed that the formula put forward by Raleigh and Jeans was not giving accurate results for the distribution of radiation with wavelength at different temperatures.

He discovered that he could explain the radiation pattern if he modified Raleigh and Jeans's distribution law to produce a simple equation that correctly explained blackbody radiation. The Raleigh-Jeans equation, which describes the electromagnetic radiation emitted by a blackbody, was incorrect for small wavelengths.

Planck resolved the flaw by proposing that energy could only be emitted in discrete quantities, called quanta. Thus, he put forward the idea of quantized energy, which was a radical shift from classical physics.

Planck’s equation for blackbody radiation successfully described the observed distribution of energy with wavelength and temperature.

Hence, Planck resolved the flaw by proposing that energy could only be emitted in discrete quantities, called quanta.

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If the net effect of all graded potentials is hyperpolarization, the membrane potential will become more negative.


Graded potentials are small changes in membrane potential caused by the flow of ions across the membrane. They can be either depolarizing or hyperpolarizing, depending on the type of ion and direction of flow. If the net effect of all graded potentials is hyperpolarization, this means that the majority of the graded potentials were hyperpolarizing and caused the membrane potential to become more negative.

This could happen, for example, if inhibitory signals were received by a neuron, causing it to become more resistant to firing. Hyperpolarization makes it harder for the neuron to reach its threshold for action potential firing, so if the net effect is hyperpolarization, the neuron will be less likely to fire.

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Answer:Hotter objects have a higher average kinetic energy and a higher temperature ; cooler objects have a lower average kinetic energy and a lower temperature.

Explanation:

Answer:

21: True

22: False

23: True

24: False

25: False

26: True

27: True

28: False

30: True

Explanation: Hope this is helpful :)

Saturn's rings are made of ice and rock. These pieces vary in size. Some are as small as a grain of sand. Others are as large as a house. The rings of Saturn are the most extensive ring system of any planet in the Solar System. They consist of countless small particles, ranging in size from micrometers to meters, that orbit around Saturn. They are found around the planet

Answer:

42

Explanation:

Relative mass = number of protons + number of neutrons

Relative mass = 20 + 22

Relative mass = 42

The name of the organic compound is 2-methyl pentane. The given organic compound is a five-carbon system with a substitution at the C-2 carbon. The naming of an organic compound is done according to the rules given by IUPAC.

The given organic compound has 5 carbon in its main chain. So It has the root word Pent. Since, all the bonds are single bonds, the organic compound is saturated, hence it has the suffix -ane. Hence the unsubstituted straight chain is pentane.

Numbering is done from right to left, because when the numbering is from right to left, the substituted carbon gets C-2, when it is numbered from left to right, the substituted carbon gets C-4. So the numbering is from the right and the substituted carbon is C-2. The substituent is a single carbon system, a methyl substituent. So the organic compound is named 2-methyl pentane .

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