Atoms of same element with different mass number are called ________

Answer:

hydrogen + oxygen is equal to water Potassium Chloride + oxygen there are reaction

The correct answer is d. Limited supply of N₂ gas. Nitrogen is an essential element for plant growth, and it is often a limiting factor in agricultural productivity.

However, the nitrogen in the atmosphere (N₂ gas) is not directly usable by most plants. To make nitrogen available for plants, it must first be converted into a usable form, such as ammonia (NH₃), nitrate (NO₃⁻), or ammonium (NH₄⁺).

The industrial production of nitrogen-containing fertilizers involves the conversion of atmospheric nitrogen (N₂ gas) into ammonia (NH₃) through the Haber-Bosch process. The process involves high pressures and temperatures and requires a source of hydrogen gas (H₂) to react with the nitrogen gas. The limiting factor in this process is the availability of nitrogen gas, which is limited by the amount of nitrogen in the atmosphere.

While energy is required for the Haber-Bosch process, it is not the limiting factor in industrial production. Similarly, inserting nitrogenase genes into plants is not a limiting factor in industrial production, and the need to exclude free oxygen is a consideration in the process, but not the limiting factor.

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The  method for separating the peptides produced by chymotrypsin treatment are  Electrophoresis, Size exclusion chromatography. The correct option are 1) and 3).

The Electrophoresis will be used to separate the peptides based on the charge properties and the size. The Peptides with the net positive charge would be move towards the negative electrode, and while the peptides with the net negative charge would be move towards the positive electrode.

The Size exclusion chromatography can be used to separate the peptides on the basis of the size. The Peptides that are the larger would be elute the earlier, while the smaller peptides would be elute the later, as they will pass through the porous stationary phase. Therefore , the correct options are 1) and 3)

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At a pH of 4.0, the environment would be acidic and the histidine residue would be protonated because the pH is lower than the pKa of its functional group (which is approximately 6.0).

The ionisation state of amino acid residues, particularly histidine, can be critical for enzyme performance. The histidine residue's protonation status can alter its capacity to interact with other residues or substrates in the enzyme's active site. As a result, a histidine residue in an enzyme at a low pH of 4.0 would most likely be protonated, altering its catalytic characteristics and perhaps affecting the enzyme's overall activity.

Amino acids are chemical compounds that are used to construct proteins. There are 20 different amino acids found in proteins, each with its own side chain that defines its chemical and physical properties.

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An increase in serum enzyme levels generally indicates - the correct answer is option C (tissue damage and necrosis).

When cells are damaged or die, enzymes that are normally contained within the cells can leak into the bloodstream. This can result in an increase in the level of certain enzymes in the blood, which can be detected by a blood test.

The specific enzyme that is elevated can provide clues about the location and extent of the tissue damage. For example, an increase in liver enzymes such as alanine transaminase (ALT) or aspartate transaminase (AST) may indicate liver damage, while an increase in creatine kinase (CK) or lactate dehydrogenase (LDH) may indicate muscle damage.

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The integrated rate law for a zero-order reaction is represented by, [A] = -kt + [A]o. Option c is the correct choice.

The integrated rate law for a zero-order reaction can be expressed as [A] = -kt + [A]o, where [A] is the concentration of the reactant at time t, [A]o is the initial concentration of the reactant, k is the rate constant, and t is the time elapsed.

The negative sign in the equation indicates that the concentration of the reactant decreases with time, while the positive [A]o term represents the initial concentration of the reactant. The slope of the graph of [A] vs. time is equal to -k, which is a constant value for a zero-order reaction.

Therefore, option c represents the integrated rate law for a zero-order reaction.

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In a substitution reaction, one element is kicked out or replaced by another element in the reaction. This type of reaction involves the replacement of an atom or group of atoms in a molecule with a different atom or group of atoms.

Substitution reactions can occur in various types of compounds, including organic molecules and inorganic compounds. For example, in organic chemistry, substitution reactions are common in reactions involving alkyl halides, where a halogen atom is replaced by a nucleophile (an atom or molecule that donates a pair of electrons to form a new bond). In inorganic chemistry, substitution reactions can occur in reactions involving metal ions, where one metal ion is replaced by another metal ion in a complex.

Overall, substitution reactions are important in many areas of chemistry and have many practical applications, such as in the synthesis of drugs, polymers, and other useful compounds.

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Every element's atomic mass is equal to the sum of its protons and neutrons. AMUs, or atomic mass units, are used to measure and represent atomic mass. Hence, atomic mass of hydrogen is  1.66×10−24g

With only one electron and being the first and lightest element in the periodic table, hydrogen has an atomic number of 1. A hydrogen atom in isolation only has one proton, one electron, and no neutrons.Protons and neutrons together make up an element's atomic mass. The mass of a hydrogen atom is 1.67 1024 g, or 1.007 u, which is the mass of one proton.

Yet this mass is similar to the 1.66 1024 g atomic mass unit.Hydrogen has a mass of 1.007 amu because this factor can be expressed as 1.007 amu.

As a result, hydrogen has an atomic mass of 1.007 amu, or 1.66 1024 g.

The three isotopes of hydrogen are protium, deuterium, and tritium. Protium has an atomic mass of 1.007 amu since it only contains one proton and one electron. Deuterium has an atomic value of 2.014 amu because it has one proton and one neutron, whereas tritium has an atomic mass of 3.021 amu because it has one proton, one electron, and two neutrons. Average atomic mass is taken into account for isotopes.

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The aggregation of nonpolar of the molecules or groups in water is thermodynamically favorable is due to the  increased entropy of the water molecules. The correct option is C.

The Entropy is the quantitative measure of the disorder or the randomness in the system or the element. In the thermodynamics, the entropy or the hydrophobic effect is the free energy change of the water enclosing the solute. Therefore , the existing negative free charges will enhances the effect of the hydrophilicity and thus, the aggregation of the non-polar molecules.

Thus, the increased in the entropy of the water molecules will effect the aggregation of the nonpolar molecules or the groups in the water is thermodynamically favorable. Therefore, the option C is correct.

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Purines and pyrimidines are two types of nitrogenous bases that are essential components of nucleotides, which make up the building blocks of DNA and RNA.

Purine synthesis: It occurs mainly in the liver, and it involves the construction of the purine ring system. The precursor molecules for purine synthesis are amino acids, carbon dioxide, and formate. The purine synthesis pathway starts with the formation of inosine monophosphate (IMP) and proceeds to the formation of adenosine and guanosine.

Pyrimidine synthesis: It occurs in multiple tissues and involves the construction of the pyrimidine ring. The precursor molecules for pyrimidine synthesis are aspartate, glutamine, and carbon dioxide. The pyrimidine synthesis pathway starts with the formation of carbamoyl phosphate and proceeds to the formation of uridine and cytidine.

The key difference between purine and pyrimidine synthesis is that purine synthesis requires more precursor molecules and metabolic steps compared to pyrimidine synthesis. Additionally, purine synthesis is regulated by feedback inhibition by end-products, while pyrimidine synthesis is regulated by a feedback mechanism involving the availability of nucleotides for DNA replication.

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To find the number of neutrons in an atom, you need to know the atomic number and a mass number of the element.

The atomic number is the number of protons in the nucleus of an atom and determines the identity of the element. The mass number is the sum of the number of protons and the number of neutrons in the nucleus of an atom.

So in general, to find the number of neutrons in an atom, you can use the following formula:

Number of neutrons = Mass number - Atomic number

It's important to note that isotopes of the same element have different numbers of neutrons. Therefore, the number of neutrons in an atom will vary depending on the specific isotope.

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The likely magnitude of the equilibrium constant K is greater than 10^3, and answer (b) is the most appropriate choice.The equilibrium constant K for the combustion reaction 2H2(g) + O2(g) = 2H2O(g) is likely to be very large, indicating a strong preference for the products at equilibrium.

This is because the reaction involves the formation of strong covalent bonds between the hydrogen and oxygen atoms, releasing a large amount of energy in the form of heat and light. The combustion reaction also involves the conversion of two moles of hydrogen gas and one mole of oxygen gas into two moles of water vapor, which means that the number of moles of gas decreases, leading to a decrease in entropy. Despite this decrease in entropy, the exothermic nature of the reaction is likely to drive the equilibrium towards the products. Therefore, the likely magnitude of the equilibrium constant K is greater than 10^3, and answer (b) is the most appropriate choice.

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The Calvin-Benson cycle or the light independent process both take place in the stroma of the chloroplast. Carbohydrates are created from carbon dioxide through a sequence of chemical processes.

The energetic electrons from the light-dependent reactions supply the energy to convert carbon dioxide molecules into carbohydrates in the light-independent reactions, also known as the Calvin cycle. Because of the cyclical nature of the process, the light-independent reactions are occasionally referred to as the Calvin cycle.

The products of the light-dependent reactions are necessary for the light-independent reactions to work even though they don't involve light as a reactant and can thus occur day or night. The creation of new carbohydrate molecules is fueled by the energy carrier molecules ATP and NADPH, which are light-independent molecules. The energy carrier molecules then go back to the light-dependent processes to get more energised electrons once the energy has been delivered. Moreover, light activates a number of the enzymes involved in the light-independent processes.

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97°F is equivalent to 36.1°C.

A temperature unit developed from the SI (International System of Units) is Celsius (symbol: °C).

Prior to the adoption of the metric system, Fahrenheit (symbol: °F) was a commonly used measurement of temperature.

To convert Fahrenheit (°F) to Celsius (°C) we have to first subtract 32 from Fahrenheit and then multiply it by .5556 or 5/9.

We have to convert 97 degrees Fahrenheit (°F) to Celsius (°C),

We can use the following formula:

°C = (°F - 32) x 5/9

As per the given information,

°F = 97

Substituting the value 99.3 for °F, we get:

°C = (97 - 32) x 5/9

°C = 36.1

Therefore, 97°F is equivalent to 36.1°C.

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Question:- What is 97 °F in °C?

The atomic symbol for the element in Group 5 A (15) and the fifth period in the periodic table is antimony or Sb.

Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.

It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.

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Specific accommodations and technological advancements needed for a successful moon mission include radiation shielding, advanced life support systems, reliable communication systems, and improved propulsion technology.

Radiation shielding is important for a moon mission because the moon has little to no atmosphere, which means that astronauts are exposed to high levels of radiation from cosmic rays and solar flares. Therefore, effective shielding is needed to protect the crew and equipment from radiation damage.

One example of improved propulsion technology that could benefit a moon mission is the development of electric propulsion systems, which are more efficient and can provide longer periods of thrust than traditional chemical rockets. Electric propulsion can also reduce the amount of fuel needed for a mission, which can lower costs and increase payload capacity.

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Answer:

Below

Explanation:

Your answer should have the same number of S.D. as the element with the least number of S.D. ....in this case  3.88  has  THREE S.D. so your answer should be rounded to three S.D.

15.222 - 3.88 = 11.342   = ~ 11.3  to three sig dig

Mass (i) and mass (ii) would be equal as according to the law of conservation of mass, the total mass of a closed system must remain constant over time, meaning that mass cannot be created or destroyed, only transformed from one form to another.

Mass is a measure of the amount of matter in an object. It is a fundamental property of matter, and it is usually measured in kilograms (kg) or grams (g). Mass is different from weight, which is a measure of the gravitational force acting on an object due to its mass. The mass of an object remains the same regardless of its location or the presence of other objects, while its weight may change depending on the strength and direction of the gravitational force acting on it. In physics, mass is an important concept that plays a role in many fundamental laws and equations, such as Newton's laws of motion and Einstein's theory of relativity.

Here,

In the case of a car burning gasoline, the mass of the gasoline is converted into other forms of matter, such as exhaust fumes and heat, but the total mass of the system remains the same. Therefore, the mass of the car with a full tank of gas is equal to the mass of the same car with an empty tank of gas plus the mass of the exhaust fumes produced while the car burned the gas. However, it is worth noting that the distribution of mass within the system may be different in each case, with the car having a higher center of mass when it is fully fueled compared to when it has an empty tank.

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The mass of water attached in the sample is 2.727 g which is equal to 0.15 moles of water. Number of moles of chromium chloride is 0.050 moles. Then the formula of the hydrate is CrCl₃. 3H₂O.

Hydrates are compounds capable of absorbing water molecules into their crystal lattice with a definite proportion. They can be dehydrated by evaporating water and give  their anhydrous form.

Here the total mass of the hydrate = 10.716 g

mass of anhydrous salt = 7.989 g

then mass of water = 10.716 - 7.989 = 2.727 g

molar mass of water = 18 g/mol.

no.of moles in 2.727 g = 2.727 /18 = 0.15  moles.

molar mass of chromium chloride  = 158.36 g

no.of moles in 7.989 g = 7.989 /158.36 = 0.050 moles.

thus the ratio of the salt to water is 0.050 :0.15. divide both by 0.050 and convert to whole number we get the ratio of 1 :3.

Therefore, the formula of the hydrate is CrCl₃. 3H₂O.

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the most correct way to express density is: g/cm³

correct option: b

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass). Density is most frequently represented by the symbol "ρ", however Latin letter D may also be used. Mass divided by volume, or ρ = m/V, is the formula for density in mathematics, where ρ stands for density, m for mass, and V for volume. Density is sometimes loosely described as weight per unit volume, although this definition is incorrect technically; the term "specific weight" is more appropriate.

Correct option: b

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The main reason for adding solvent slowly to a volumetric flask is to ensure that the final volume of the solution is accurate and precise.

Volumetric flasks are designed to contain a specific volume of liquid at a particular temperature and require careful handling to achieve the desired result. By adding solvent slowly and with care, the final volume can be precisely measured and controlled, reducing the risk of error and ensuring that the concentration of the solution is accurate. Additionally, adding solvent slowly helps to minimize the formation of air bubbles, which can affect the final volume of the solution and its accuracy. Overall, adding solvent slowly to a volumetric flask is an important step in achieving accurate and precise measurements in chemical experiments.

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In physics, a non-reaction force, also known as an action-at-a-distance force, is a force that acts on an object without direct contact. Non-reaction forces are types of external forces, which are forces that act on an object from outside of the object.

Examples of non-reaction forces include gravitational forces, electric forces, and magnetic forces. These forces act on objects from a distance, without any direct contact between the objects. For example, the force of gravity that keeps planets in orbit around the sun is a non-reaction force.

One of the key characteristics of non-reaction forces is that they are not affected by the motion or velocity of the object they are acting upon. In other words, non-reaction forces act independently of the motion or position of the object they are acting on.

Non-reaction forces are important in many areas of physics, including classical mechanics, electromagnetism, and quantum mechanics. They play a crucial role in our understanding of the behavior of objects and the natural world around us.

It is important to note that non-reaction forces can also be balanced or unbalanced, just like reaction forces. If the non-reaction forces acting on an object are balanced, then the object will remain in a state of rest or continue to move at a constant velocity. If the non-reaction forces are unbalanced, then the object will experience acceleration and its motion will change.

In summary, non-reaction forces are types of external forces that act on an object from a distance, without any direct contact. They include gravitational, electric, and magnetic forces, and are not affected by the motion or velocity of the object they are acting on. Non-reaction forces play a crucial role in our understanding of the behavior of objects and the natural world around us.

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An absorber is a unit operation used in chemical engineering that uses a liquid to remove a gaseous component from a mixture of gases. Gas scrubbing or gas absorption are other names for this procedure.

Chemical engineers frequently employ absorbers to extract a gas component from a gas mixture using a liquid solvent. In order to selectively absorb the desired component, the procedure requires passing the gas mixture through a tank or column filled with a liquid solvent. Depending on the kind of gas being treated, the solvent may be organic or aqueous. Because to the disparity in concentration between the two phases, the absorbed component is transported from the gas phase to the liquid phase. The absorbed component is then recovered by processing or regenerating the liquid solvent. Absorbers are utilised in a variety of industrial processes, including those in the chemical, petrochemical, pharmaceutical, and environmental sectors.

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The reactivity toward electrophilic aromatic substitution increases with the density of electrons on the aromatic ring.

The majority of electrophiles are positively charged, contain an atom with a partial positive charge, or lack an element with an octet of electrons. Most interactions between electrophiles and nucleophiles take place in addition and substitution processes.

Because they lack an electron, electrophiles can receive an electron pair from organisms that have an abundance of them. Examples include carbonyl compounds and carbocations. A nucleophile is a species that has an abundance of electrons and gives electron pairs to species that lack electrons. Carbanions, water, ammonia, cyanide ions, and others are examples.

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In the quantum mechanical wave model of orbitals, the atomic orbital may be expressed as a probability density.

Electrons are described using orbitals and energy levels in quantum mechanical theory. Its base is Schrodinger's wave equation. This complicated model takes into consideration the electron's wave-particle duality.

An atom's orbital, according to quantum physics, is the place having the highest chances of harbouring an electron. There is a mathematical definition for this.

The probability density is investigated in respect to the shapes of these orbitals. The wave function is defined by its square.

This model is concerned with quantum numbers, which may be utilised to locate electrons at different energy levels.

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Answer:

sublimation

Explanation:

sublimation when the soild skips the liquid part

Hydrogen bonds are created in the secondary structure of proteins.

The term "secondary structure" describes the predictable, recurrent spatial configurations of adjacent amino acid residues in a polypeptide chain. The amide hydrogens and carbonyl oxygens of the peptide backbone form hydrogen bonds that keep it in place. Both -helices and -structures are important secondary structures.

The folding of precise structural patterns into specified regions on a regular basis inside a single polypeptide chain is known as secondary structure, which is the level above primary structure. Secondary structures typically hold together hydrogen bonds between the peptide bond amide hydrogen and the carbonyl oxygen.

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Answer:

C. identification. PCR testing can aid in the identification of fly species in a forensic investigation.

Explanation:

PCR testing can aid in the identification of fly species in a forensic investigation. PCR (Polymerase Chain Reaction) is a laboratory technique that allows the amplification of a small amount of DNA to detectable levels.

In forensic entomology, PCR can be used to identify the species of flies that are found at a crime scene. This is important because different species of flies have different developmental rates and life cycles. By identifying the species of fly present at a crime scene, forensic investigators can estimate the time of death more accurately.

PCR can be used to identify the fly species by analyzing the DNA present in the fly samples. The DNA is extracted from the samples and then amplified using PCR. The amplified DNA can then be sequenced to identify the fly species.

Therefore, the answer to the question is C. identification. PCR testing can aid in the identification of fly species in a forensic investigation.

The values of z , n ,a for a pair of atoms can often be compared as follows: Atomic mass, the principal quantum number (n), and the atomic number (z) (a).

The values of z, n, and a are crucial quantities that characterise an atom's characteristics. The number of protons in the nucleus, or the atomic number (z), specifies the element to which the atom belongs. The energy level and spatial distribution of electrons are determined by the principal quantum number (n), with larger values signifying greater distance from the nucleus and higher energy. The total number of protons and neutrons in the atom's nucleus, or atomic mass (a), defines the atom's overall mass. Comparing and contrasting various atoms, such as those that belong to various elements, isotopes, or ionisation states, is possible using the values of z, n, and a. They are essential to comprehending the atomic level structure and behaviour of matter.

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Answer:

oxygen is the answer

Explanation:

the molecule