If a calm person with a lung capacity of 3.5 liters and a body temperature of 360 C gets angry, what will the volume of the person’s lungs be if their temperature rises to 390 C. Based on this, do you think it’s likely they will explode?

a. In the following list 4s orbital can be filled before 4p orbital.

b. The maximum number of electrons in 4s subshell is 2.

c. An electron in an orbital has 4 quantum numbers n, l, ml, ms.

According to the Aufbau principle, electrons first occupy lower-energy atomic orbitals before moving on to higher-energy ones. Hence 4s orbitals filled before 4p followed by filled d orbitals. similarly the maximum capacity of s subshell to hold electron  is 2, while p subshell is 6, 10 for d subshell and 14 for f subshell. Electron in an orbital can be completely described by principle quantum number n which represents the main electronic shell, Azimuthal quantum number l determines an orbital's shape, magnetic quantum number ml defines how many orbits there are and how they are oriented within a subshell and spin quantum number ms describes the spin of electrons.

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Answer: A

Explanation: A

The molar heat capacity of iron when temperature of 150 g of iron increased from 27.1 °C to 33.1 °C after absorbing 406 J of heat is 25.2 J/mol °C. The correct option is c.

To determine the molar heat capacity of iron, we can use the formula: q = n * C * ΔT, where q is the heat absorbed, n is the number of moles of iron, C is the molar heat capacity, and ΔT is the change in temperature.

First, we need to find the number of moles of iron (n). The molar mass of iron (Fe) is 55.85 g/mol. With 150 g of iron, we can calculate the number of moles as:

n = mass / molar mass = 150 g / 55.85 g/mol ≈ 2.69 mol

Next, we need to find the change in temperature (ΔT). The initial temperature is 27.1 °C and the final temperature is 33.1 °C, so the change is:

ΔT = 33.1 °C - 27.1 °C = 6.0 °C

The heat absorbed (q) is given as 406 J. Now we can solve for the molar heat capacity (C) using the formula:

406 J = 2.69 mol * C * 6.0 °C

To find C, we can rearrange the formula and divide both sides by (2.69 mol * 6.0 °C):

C = 406 J / (2.69 mol * 6.0 °C) ≈ 25.1 J/mol °C

The closest answer choice is 25.2 J/mol °C, so the correct answer is (c) 25.2 J/mol °C.

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C₆H₁₄ has the lower boiling point,  H₂O has higher heat of vaporization, Cha has higher evaporation rate and CH₃COOH has lower vapor pressure.  

The evaporation rate is the time required to evaporate a test solvent divided by the time required to evaporate a reference solvent under identical conditions. The results can be expressed as a percentage evaporated in a given time frame, the time required to evaporate a given amount, or a relative rate. The pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases in a closed system at a given temperature is defined as vapor pressure. The equilibrium vapor pressure indicates the thermodynamic tendency of a liquid to evaporate. It is concerned with the equilibrium of particles escaping from a liquid with those in a coexisting vapor phase. A volatile substance is one that has a high vapor pressure at room temperature.

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Complete Question

For each of the following pairs, predict which will have (1) the lower boiling point, (2) the higher heat of vaporization, (3) the higher evaporation rate, (4) the lower vapor pressure.

Pairs:  C₆H₅OH - C₆H₁₄, H₂O - H₂Se, CH₂OH - CHa, C₂H₆ - CH₃COOH.  

The pharmacist should add 50 ml of the 4% Minoxidil solution to obtain the desired 2% Minoxidil solution.

To determine how much 4% Minoxidil solution the pharmacist needs to add, we can set up a basic equation based on the concentration of Minoxidil in the two solutions.

Let's denote the volume of the 4% Minoxidil solution to be added as 'x' ml.

The pharmacist has 100 ml of a 1% Minoxidil solution, which means it contains 1 ml of Minoxidil per 100 ml of solution. Therefore, the amount of Minoxidil in the 1% solution is 1% of 100 ml, which is 1 ml.

The goal is to obtain a 2% Minoxidil solution. So, the total amount of Minoxidil needed in the final mixture is 2% of (100 ml + x ml), which can be expressed as 2% * (100 + x) ml.

Since we want to combine the Minoxidil from the 1% solution and the 4% solution, we can set up the equation:

1 ml + amount of Minoxidil in the 4% solution = 2% * (100 ml + x ml)

Simplifying the equation, we get:

1 + 0.04x = 2 + 0.02x

0.04x - 0.02x = 2 - 1

0.02x = 1

x = 1 / 0.02

x = 50 ml

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Answer: Physical change : tearing of paper, fixing of wtaer

Chemical change:  rusting of iron ,  electrolysis of water​, Rancidification

Explanation:

Physical change is a change in which there is no rearrangement of atoms and thus no new substance is formed. There is only change in physical state of the substance.

Example:  tearing of paper, fixing of wtaer

Chemical change is a change in which there is rearrangement of atoms and thus new substance is formed. There may or may not be a change in physical state.

Example: rusting of iron ,  electrolysis of water​, Rancidification

Answer:

Yes.A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element.

In a Lewis acid-base reaction, the base donates a(n) electron pair to form a new coordinate dative bond between the base and the acid.

In this type of reaction, the Lewis acid is a species that can accept an electron pair, and the Lewis base is a species that can donate an electron pair. The base donates its electron pair to the vacant orbital of the acid, resulting in the formation of a coordinate bond.

The electron pair donated by the base forms a bond with the Lewis acid, creating a new bond between the base and the acid. This coordinate bond is also known as a dative bond because both electrons in the bond come from the base.

Overall, in a Lewis acid-base reaction, the base donates an electron pair to the Lewis acid, resulting in the formation of a new coordinate bond between the base and the acid.

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Diels-Alder addition products will be formed from the reaction.

Using 2,3-dimethyl butadiene, isoprene, and styrene as dienes, it was determined how the Diels-Alder reactions of methoxy-p-benzoquinone, 2,6-dimethoxy-p-benzoquinone, which may be produced from lignin and lignin model compounds, and o-quinones (4-methyl, 4-acetyl, and 4-(l-hydroxyethyl It was discovered that dimethyl butadiene and isoprene were efficient reactants, leading to the production of a number of Diels-Alder addition products. Under other circumstances, the methoxyl group and the side chain were lost. In general, the p-benzoquinones' reactions progressed more easily than those of the o-quinones, and the product yields were higher. Compared to methoxy-p-benzoquinone, 2,6-dimethoxy-p-benzoquinone produced higher yields of anthraquinone derivatives.

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The molar solubility of AgCl in a solution that has [Cl−] = 2.0 × 10^−2M is 9.0 × 10^−9 M.

The solubility product constant, Ksp, for AgCl is given as 1.8 × 10^−10 at a certain temperature. The expression for Ksp is:

Ksp = [Ag+][Cl−]

where [Ag+] is the concentration of Ag+ ions in the solution, and [Cl−] is the concentration of Cl− ions in the solution.

For AgCl, the dissociation reaction is:

AgCl(s) ⇌ Ag+(aq) + Cl−(aq)

Let the molar solubility of AgCl be S. Then, at equilibrium, the concentrations of Ag+ and Cl− ions in the solution will be S and 2.0 × 10^−2 M, respectively.

So, the equilibrium expression for Ksp is:

Ksp = [Ag+][Cl−] = S × 2.0 × 10^−2

Substituting the given values, we get:

1.8 × 10^−10 = S × 2.0 × 10^−2

S = (1.8 × 10^−10) / (2.0 × 10^−2) = 9.0 × 10^−9 M

Therefore, the molar solubility of AgCl in a solution that has [Cl−] = 2.0 × 10^−2M is 9.0 × 10^−9 M.

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The concentrations of the reactants and products at equilibrium, we can calculate Kc 2.56

Concentration is a measure of the amount of a substance within a given quantity of another substance or medium. It is usually expressed as mass per unit volume. For example, a concentration of a solute in a solution is the mass of that solute, per unit volume of the solution. Concentration is an important concept in many fields, including chemistry, physics, and biology, amongst other sciences.

The reaction that is happening is: S₂Cl₄(g) → 2SCl₂(g)
For the reactant, S₂Cl₄ at equilibrium:
Moles S₂Cl₄ = 1.25 moles
Volume = 2.0 L
Concentration = 1.25 moles / 2.0 L = 0.625 M
For the product, SCl₂ at equilibrium:
Moles SCl₂ = 2.5 moles (since 2 moles of SCl₂ are produced for every mole of S₂Cl₄)
Volume = 2.0 L
Concentration = 2.5 moles / 2.0 L = 1.25 M
Now that we have the concentrations of the reactants and products at equilibrium, we can calculate Kc.
Kc = [SCl₂]₂ / [S₂Cl₄]
Kc = (1.25 M)² / 0.625 M
Kc = 2.56

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Chemical bonding explains the properties of chemical and biological polymers by forming strong covalent bonds or flexible hydrogen bonds, which give the polymer its unique characteristics.

Chemical bonding is a fundamental concept that explains the properties of chemical and biological polymers. Chemical bonds are formed when atoms interact with each other to form molecules or particles. In a polymer, the atoms are linked together in a repeating pattern, forming a long chain. These bonds give the polymer its unique properties, such as strength, flexibility, and the ability to interact with other molecules. The type of chemical bond formed between the atoms will determine the properties of the polymer.

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Rubidium and cesium have similar chemical properties because in the ground state the atoms of both elements each have one electron in the outermost shell.

A German chemist, organized the elements by atomic mass and grouped them according to their chemical properties. Later , Dmitri Mendeleev, organized all the known elements according to similar properties. He left gaps in his table for what he thought were undiscovered elements, and he also made some bold predictions regarding the properties of those undiscovered elements. When elements were later discovered whose properties closely matched with the Mendeleev’s predictions, his version of the table gained favor in the scientific community. This he predicted because certain properties of the elements repeat on a regular basis throughout the table that is, basically they are periodic, therefore it became known as the periodic table.

Elements that have similar chemical properties are grouped in columns called groups or families) As well as being numbered, some of these groups have names—for example, alkali metals (the first column of elements), alkaline earth metals (the second column of elements), halogens (the next-to-last column of elements), and noble gases (the last column of elements).

Hence Rubidium and cesium have similar chemical properties because in the ground state the atoms of both elements each have one electron in the outermost shell.

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Answer:

Atomic Number = 3.

Explanation:

The number of protons determines the atomic number. Basically the number of protons is the exact same as the atomic number.

Protons 3 = Atomic number 3

The correct option is: Glass; viscous liquid; rubbery solid

The correct representation for the sequential change in mechanical state with increasing temperature for an amorphous polymer is:

Glass; viscous liquid; rubbery solid

At low temperatures, the amorphous polymer is in a glassy state, where the molecular motion is restricted, and the material is rigid and brittle. As the temperature increases, the polymer undergoes a transition to a viscous liquid state, where the molecular motion increases, and the material becomes more flowable and less rigid. Finally, at even higher temperatures, the polymer enters the rubbery solid state, where the material is flexible, elastic, and exhibits significant molecular motion.

Therefore, the correct option is: Glass; viscous liquid; rubbery solid

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The name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.

Alkanes belong to the family of  saturated hydrocarbons with carbon carbon single bond.

For the given alkane;

          CH₃    H

 CH₃ -  C   -  C - CH₃

            H      H

Thus, the name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.

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Answer:

2-methylbutane

Explanation:

Answer:

false false false false

Answer:

Absolute temperature and 100% accurate

Explanation:

Answer:

Absolute temp is measured on a scale in which the hypothetical lowest limit of physical temperatures is assigned the value zero (absolute zero )

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The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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Answer:

Explanation:

Litio -7 (⁷₃Li)

número de protones = 3

número de electrones = 3

número de neutrones = 4

Neon- 20 (²⁰₁₀Ne)

número de protones = 10

número de electrones = 10

número de neutrones = 10

Cloro - 35 (³⁵₁₇Cl)

número de protones = 17

número de electrones = 17

número de neutrones = 18

Fósforo - 31 (³¹₁₅P)

número de protones = 15

número de electrones = 15

número de neutrones = 16

Bromo - 80 (⁸⁰₃₅Br)

número de protones = 35

número de electrones = 35

número de neutrones = 45

Carbono - 14 (¹⁴₆C)

número de protones = 6

número de electrones = 6

número de neutrones = 8

When the concentration of solutes is greater outside the cells than inside the cells, the solution outside the cells is Hypotonic (C)

The term "hypotonic solution" describes a solution that, when passed through a semipermeable membrane, has a lower solute concentration than other solutions. A solution like this one will result in a lower solute concentration as well as an overall flow of water within the cell. This results in the swelling breaking apart. As a direct consequence of this, the osmotic pressure of a hypotonic solution is significantly lower than the osmotic pressure of other solutions.

The osmotic potential of a hypotonic solution causes water molecules to move into a cell from outside the cell. When water molecules continue to diffuse into a cell, the cell can enlarge. And it can cause the cell to rupture or undergo cytosis. But unlike animal cells, plant cells have a solid cell wall and are less likely to burst.

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There are 1.2 moles of KBr found in 3 Liters of 0.4 M solution.

The number of moles of a substance can be calculated by multiplying the molarity by the volume.

No. of moles = Molarity × volume

According to this question, 3L of a KBr solution are contained in a 0.4M.

no. of moles = 3L × 0.4M = 1.2moles

Therefore, there are 1.2 moles of KBr found in 3 Liters of 0.4 M solution.

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True. Thermal energy, which is quantified as heat, is the movement of particles inside a material. Particles exchange energy in the form of heat as they travel more quickly or collide with one another.

Hence, thermal energy may be produced by the movement of particles.

The movement of particles within a material results in the production of thermal energy, often known as heat energy. Kinetic energy, which occurs when particles travel more quickly, or potential energy, which occurs when particles vibrate more quickly, might cause this movement. As particles contact, heat is transferred from one particle to the next, and this energy transfer lasts until the substance reaches thermal equilibrium. The temperature and quantity of heat energy within the material increase with particle mobility. Understanding this concept is crucial for comprehending a variety of phenomena, such as heat transport, thermodynamics, and the behaviour of matter in different states.

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Answer:

T₂ = 800 K

Explanation:

Given that,

Initial temperature of the gas, T₁ = 127°C = 400 K

Initial volume, V₁ = 10 L

Final volume, V₂ = 20 L

We need to find the new temperature.

The volume of a gas is directly proportional to its Kelvin temperature.

Let T₂ is the new temperature. So,

\(\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{20\times 400}{10}\\\\T_2=800\ K\)

So, the new temperature of the gas is 800 K.

0.666g/ml is the density of a 50 g irregular solid with a volume 75 milliliters. Another way to state density is in kilograms per cubic meter.

Density is the mass of a specific material per unit volume. d = M/V, in which d is density, M is weight, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density.

For instance, whereas Earth has a density of 5.51 milligrams, water has a density of 1 milligrams. Another way to state density is in kilograms per cubic meter (in metre-kilogram-second or SI units).

density=mass/ volume

           =50 g /75 milliliters=0.666g/ml

Therefore, 0.666g/ml is the density of a 50 g irregular solid with a volume 75 milliliters.

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Explanation:

Structural formula of propene

molecular formula = C₃H₆

molecular mass = 12×3+1×6 = 36+6 = 42

no. of double bond = 1

The three alkenes :-

2 methyl 1 butene

2 methyl 2 butene

2 methyl 3 butene

Hydrogenation is a chemical reaction between molecular hydrogen (H2) and any other compound or element, normally within the presence of a catalyst together with nickel, palladium or platinum. The method is normally employed to reduce or saturate natural compounds.

Alkenes are a category of hydrocarbons (e.g, containing handiest carbon and hydrogen) unsaturated compounds with as a minimum one carbon-to-carbon double bond. any other term used to describe alkenes is olefins. Alkenes are greater reactive than alkanes because of the presence of the double bond.

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The shorthand electron configuration of a potassium ion (K+) is [Ar] 4s1.

Electron configuration refers to the arrangement of electrons in an atom or ion. In a neutral atom, the number of electrons is equal to the number of protons, resulting in a neutral charge. However, in an ion, the number of electrons is not equal to the number of protons, resulting in a charge.

The shorthand electron configuration uses symbols from the periodic table to represent the elements, with electron configurations being abbreviated by using the noble gas symbol (in square brackets) that precedes the element in question in the periodic table. In this case, the noble gas symbol [Ar] represents Argon, and the electron configuration of K+ is then given as [Ar] 4s1, indicating that the electron configuration of potassium has lost one electron from its 4s orbital, leaving a single electron in the 4s orbital and a positive charge on the ion.

In more detailed terms, the electron configuration of a neutral potassium atom would be [Ar] 4s1 3d10, where the [Ar] represents the electron configuration of Argon (the preceding noble gas in the periodic table), and the 4s1 and 3d10 indicate the number of electrons in the 4s and 3d orbitals, respectively. However, in the case of a potassium ion, one electron has been removed, resulting in a positive charge and the shorthand electron configuration of [Ar] 4s1.

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Answer: Either B. The metallic bonds become weaker allowing the aluminum to freeze. or D. Freezing is an exothermic process

Explanation: As the aluminum cools, thermal energy leaves it. If enough energy is removed, the aluminum will freeze. Freezing is a process that is the opposite of melting—liquid changes to solid. The temperature at which matter changes from the liquid state to the solid state is its freezing point.

Furthermore, the aluminium would expand in volume as it becomes liquid. During freezing, a similar process would occur in which the top surface would initially freeze. This results in shrinkage and the aluminium detaching itself from the walls of the steel crucibles.

The volume of NH₃ needed is 0.04 L.

So, the correct answer is A.

Ammonium sulfate ((NH₄)₂SO₄) is a widely used fertilizer, prepared by reacting ammonia (NH₃) with sulfuric acid as shown in the balanced chemical equation:

2NH₃(g) + H2SO₄(l) -> (NH₄)₂SO₄(aq).

To calculate the volume of NH₃ needed at 87°C and 300 kPa to react with 19.56 g of H₂SO₄, first determine the moles of H₂SO₄:

Moles of H₂SO₄ = mass / molar mass = 19.56 g / (2 * 1 + 32.1 + 4 * 16) g/mol = 19.56 g / 98.08 g/mol = 0.1995 mol

According to the stoichiometry of the reaction, 2 moles of NH₃ are needed for every mole of H₂SO₄.

So, moles of NH₃ = 2 * moles of H₂SO₄ = 2 * 0.1995 mol = 0.399 mol.

Now, use the ideal gas equation (PV=nRT) to find the volume of NH₃:

V = nRT/P = (0.399 mol)(8.314 J/molK)(87°C + 273.15 K) / (300 kPa * 1000 Pa/kPa) = 0.399 mol * 360.15 K * 8.314 J/molK / 300000 Pa = 0.040 L

Hence the answer of the question is A.

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