Chemical combination of two or more atoms that form a specific chemical compound is called: ____________

The distribution of electrons among the orbital shells and subshells is shown in the electron configuration of an atom.

What electron configuration exists in group 18 of period 3?

• According to the Periodic Table, P3- has the same electrical configuration as argon, the following Noble gas (Group 18) element, which is 2,8,8.

• The number of valence electrons in groups 1-2 and 13-18 rises by one from one element to the next across the periodic table's rows, or periods.

•There are several different arrangements for electrons. There should be two distinct trends or patterns: The number of valence shell electrons is constant for elements belonging to the same Group. Along a Periodic Table period, valence electrons are added in increasing numbers from left to right.

• Phosphorus (symbol P) has an atomic number of 15, according to a periodic table or table of elements.

Thus, there are 15 protons in each atom. Lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium are the chemical elements that make up alkali metals (Fr).

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Answer

All of the above are the routes of chemical exposure to the body.

There are 3 routes  of chemical  exposure and pollutants:

inhaling

absorption

ingesting

One is  exposed to chemicals and pollutants when one  inhale (breathe in).  This number can be much higher for infants and children. The chemicals and pollutants you inhale can end up in your lungs and blood stream.

Absorption

One can be exposed to chemicals and pollutants by coming into contact with them through your skin and eyes. These organs can be more sensitive to chemicals and may react more quickly than the rest of your body.

Ingesting

One is exposed to chemicals and pollutants when you eat and drink. Chemicals and pollutants are found in both our food and water sources.

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At constant pressure, a volume of methane gas is heated from to. The gas has a final volume of 44.1 L.

Methane is a colorless gas with no discernible odor. Due to overtone bands, it does absorb visible light, especially at the red end of the spectrum, although the impact is only apparent if the light path is very lengthy.Since pressure is constant, it also cancels with n and r when using the equation v1/t1 = v2/t2 and the law pv=nrT. demonstrate that t1 = 25 + 273.15; t2 = 88 + 273.15; and v1 = 36.4. 273.15 is the Kelvin conversion. then figure out v2. It contains 44.1 L.

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complete question

A 36.4-l volume of methane gas is heated from 25°c to 88°c at constant pressure. what is the final volume of the gas?

The noble gas core that would be used when writing the ground state electron configuration for magnesium is Ne.

A noble gas that precedes the elements in the periodic table. We write the noble gas configuration by writing the valence electrons followed by the noble gas nucleus. They are called noble gases because they are very majestic and generally do not react to anything.

Noble gases are colorless odorless tasteless and non-flammable under normal conditions. They were called group 0 in the periodic table because they were believed to have zero valences, meaning that the atoms cannot combine with atoms of other elements to form compounds. It is very inert because the valence shell is filled.

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The pressure inside the tank would be approximately 308 atm if it were left outside in the sun at a temperature of 37C.

The pressure inside the tank will increase if the temperature increases. This is because the oxygen molecules in the tank will have more energy and will collide with the walls of the tank more frequently, resulting in higher pressure.

To calculate the new pressure, you can use the ideal gas law, which states that the pressure of a gas is directly proportional to its temperature and the number of molecules present (assuming the volume is constant).

So, the new pressure can be calculated using the following equation:

P1/T1 = P2/T2

Where:

Solving for P2, we get:

P2 = (P1 * T2) / T1

= (204 atm * 37C) / 23C

= approximately 308 atm

So the pressure inside the tank would be approximately 308 atm if it were left outside in the sun at a temperature of 37C.

It's worth noting that this calculation assumes that the gas in the tank is an ideal gas, which means it follows the ideal gas law perfectly. In reality, the behavior of gases can deviate from the ideal gas law due to the presence of intermolecular forces, and the pressure in the tank may not exactly match the value calculated using the ideal gas law.

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The pressure inside the tank would be approximately 308 atm if it were left outside in the sun at a temperature of 37C.

The pressure inside the tank will increase if the temperature increases. This is because the oxygen molecules in the tank will have more energy and will collide with the walls of the tank more frequently, resulting in higher pressure.

To calculate the new pressure, you can use the ideal gas law, which states that the pressure of a gas is directly proportional to its temperature and the number of molecules present (assuming the volume is constant).

So, the new pressure can be calculated using the following equation:

P1/T1 = P2/T2

Where:

P1 is the initial pressure (204 atm)

T1 is the initial temperature (23C)

P2 is the final pressure (what we want to find)

T2 is the final temperature (37C)

Solving for P2, we get:

P2 = (P1 * T2) / T1

= (204 atm * 37C) / 23C

= approximately 308 atm

So the pressure inside the tank would be approximately 308 atm if it were left outside in the sun at a temperature of 37C.

It's worth noting that this calculation assumes that the gas in the tank is an ideal gas, which means it follows the ideal gas law perfectly. In reality, the behavior of gases can deviate from the ideal gas law due to the presence of intermolecular forces, and the pressure in the tank may not exactly match the value calculated using the ideal gas law.

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The half-life for the radioactive decay of plutonium-239 is 24,000 years. 1.896 x 10⁶ years it will take for one mole of this radioactive material to decay.

Half life of plutonium-239 = 24,000 years

Number of years of one-mole material decay = ?

For this, we will use the following equation

k = 0.693 ÷ t 1/2

k = 0.693 ÷ 24000 years

k = 0.000028875

Now find it for 1 atom

n = 6.023 x 10²³ atoms which is equal to 1 mole

There for n-x = 1

now

t = ( 1 ÷ k) × ln( n ÷ n-x)

t = ( 1 ÷ 0.000028875) × ln( 6.023 x 10²³ ÷ 1)

t = 1.896 x 10⁶ years

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The name of the region around the nucleus where electrons are found is orbital

An atom is the smallest component of ordinary matter with chemical elemental characteristics. Protons and neutrons, which make up its nucleus, and electrons, which orbit around them, are the subatomic particles that make up every atom. Electrons have a negative charge, neutrons have a neutral charge, and protons have a positive charge.

In other words, every atom has an electron-rich energy level and a nucleus where protons and neutrons interact. This is because electrons are present in the orbitals, or peripheral region, as opposed to the atomic nucleus, which is the centre region of the atom made up of protons and neutrons. Thus, the region around the nucleus where electrons are found is orbital

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The mass of an electron in atomic mass units is 0.000549 u

A negatively charged subatomic particle known as an electron can either be free or attached to an atom which is not bound. One of the three main types of particles within an atom is an electron that is bonded to it; the other two are protons and neutrons.

The atomic mass unit (AMU), which is a unit of mass used to express the masses of atoms and molecules, should be noted. The mass of an electron in atomic mass units is 0.000549 u.  In physics and chemistry, this unit is frequently used to denote the masses of atoms, molecules, and subatomic particles like protons, neutrons, and electrons. This value is based on the most precise measurements of the mass of the electron available.

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No, they are not, compounds are uniquely different from the elements from which they are made.

When studying chemistry, you often encounter the terms elements and compounds. Elements and compounds are often mistaken for the same thing, but they are very different.

The difference between elements and compounds can be seen from their definitions. Reporting from the Encyclopedia Britannica, elements are substances that cannot be broken down into simpler substances by ordinary chemical processes.

The elements are the basic ingredients that make up all kinds of matter. Meanwhile, a compound is a substance consisting of two or more elements. Thus, a compound can be broken down into its constituent elements.

Elements consist of only one type of atom. Meanwhile, compounds consist of more than two atoms of the same type, or more than two atoms of different types. The composition of the atoms that make up the compound has a certain ratio that is bound in chemical bonds.

Elements and compounds have different symbols to represent their identity. Elements are represented by symbols in the form of abbreviated atomic names, for example H for hydrogen and Na for sodium. Meanwhile, compounds are represented by chemical formulas or empirical formulas. Reporting from Thought Co, the empirical formula is a formula that shows the ratio of elements forming a compound. Ratios are represented by the symbol of the element and the subscript number. For example, glucose has the empirical formula CH2O. Meanwhile, glucose has the molecular formula C6H12O6 which symbolizes the number of atoms in it.

The difference between elements and compounds is the amount. Reporting from Science Notes, there are 118 elements listed in the periodic table. Meanwhile, compounds that are combinations of elements have more numbers. It is estimated that there are about 350 thousand existing compounds. However, this number can continue to increase along with the development of science.

Examples of elements:

Hydrogen (H), Boron (B), Iron (Fe), Gold (Au), Copper (Cu)

Examples of compounds:

Water (H2O), Methane (CH4), Hydrochloric acid, (HCl) Sodium chloride (NaCl) ,Sucrose (C12H22O11)

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There are a few different activities that a student can perform to demonstrate the formation of soil through chemical processes. Here are two examples:

Soil acidification experiment: In this activity, students can observe the effect of acid rain on soil pH. They can set up a controlled experiment using soil samples and different concentrations of an acidic solution (such as vinegar). They can measure the pH of the soil before and after adding the acidic solution and observe any changes in the pH over time. This can help students understand how chemical processes, such as the reaction of acid rain with minerals in the soil, can alter the chemical properties of soil.

Soil mineralization experiment: In this activity, students can observe the formation of soil minerals through the process of weathering. They can set up a controlled experiment using different types of rocks and soil samples, and expose them to various weathering agents (such as water, sunlight, and temperature changes). They can then observe any changes in the composition of the rocks and soil over time, and compare the results to see which weathering agents are most effective at breaking down the rocks and forming soil minerals. This can help students understand how chemical processes, such as the reaction of water and minerals in the rock, can lead to the formation of soil over time.

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There are a few different activities that a student can perform to demonstrate the formation of soil through chemical processes. Here are two examples:

Soil acidification experiment: In this activity, students can observe the effect of acid rain on soil pH. They can set up a controlled experiment using soil samples and different concentrations of an acidic solution (such as vinegar). They can measure the pH of the soil before and after adding the acidic solution and observe any changes in the pH over time. This can help students understand how chemical processes, such as the reaction of acid rain with minerals in the soil, can alter the chemical properties of soil.

Soil mineralization experiment: In this activity, students can observe the formation of soil minerals through the process of weathering. They can set up a controlled experiment using different types of rocks and soil samples, and expose them to various weathering agents (such as water, sunlight, and temperature changes). They can then observe any changes in the composition of the rocks and soil over time, and compare the results to see which weathering agents are most effective at breaking down the rocks and forming soil minerals. This can help students understand how chemical processes, such as the reaction of water and minerals in the rock, can lead to the formation of soil over time.

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Molarity x volume = 0.585 M x 39.29 mL = 22.984 mmol

At half equivalence point, half of base is neutralized.

Amount of methylamine neutralized: 22.984 /2 = 11.492 mmol

Volume = moles/ molarity = 11.492mmol/0.644M = 17.84mL

We divide the total number of moles of solute by the sum of the solution's liters to determine the molarity of the solution. A chemical species' concentration in a solution, specifically the volume of a solute per unit volume of solution, is measured by its molar concentration. The number of moles per liter is the most often used unit for molarity in chemistry.

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Contrary to kegend, caneks di bit store water in their humps, which actually consist of large fat deposits. These fat deposits serve as a source of water because oxidation of fats releases metabolic water.

During the oxidation of organic substances (fats) releases metabolic water along with release of energy which will be explained with the example below

For example –  

Oxidation of one mole of Palmitic acid (C16H32O7) acid releases 146 mole of H2O. In Tri palmitoyl glycerol (fat C51H98O6) , there are 3 palmitic acid residues connected to glycerol molecule via ester bonds.

The equation of Oxidation of Palmitoyl CoA will be as follows;

palmitoyl-CoA + 23O2 + 108Pi + 108 ADP => 88nCoA + 108 ATP + 16CO2 + 23 H2O

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Answer:

Temperature <3

Explanation:

Since it's use to measure kinetic energy, have a nice day! :)

The thermodynamic equilibrium constant In a chemical equilibrium, K is the appropriate quotient of species activities. At normal temperatures and pressures, an activity cannot be very many orders of magnitude more than one.

The definition of thermodynamic properties is "system characteristics that can specify the state of the system." Some constants, like R, are not attributes since they do not describe the state of a system. Thermodynamics states that the conversion of diamond to graphite occurs spontaneously and is favourable. However, this reaction moves extremely slowly because kinetics, not thermodynamics, regulates it. As a result, diamond is thermodynamically unstable but kinetically stable. An axiomatic idea in thermodynamics is the concept of equilibrium. One thermodynamic system's internal state, or a relationship between numerous thermodynamic systems, is what it is.

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Answer: the constant process of photosythesis

Explanation:

it say in the etxt book

The reaction that shows the combustion of methane is given by;

[tex]CH_{4} (g) + 2O_{2} (g) --------- > CO_{2}(g) + 2H_{2}O(g)[/tex]

We know that a combustion reaction is the kind of reaction that occurs when a substance is burnt in oxygen. We know that the burning of a substance on oxygen would lead to the oxidation of the product.

In the case of an organic compound like methane, when the substance has been burnt in oxygen, the products of the reaction are now carbon dioxide and water. This are the oxidation products of the combustion.

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As a result, the photon's wavelength (measured in nanometers) is equal to 1874 nm when the hydrogen atom's electron switches from the n = 4 state to the n = 3 state.

The electromagnetic force is carried by a photon, a basic particle that is a quantum of the electromagnetic field and includes electromagnetic radiation like light and radio waves. Due to their lack of mass, photons always travel at the speed of light in a vacuum, which is 299792458 m/s (or 186,282 mi/s). The photon is a member of the boson family. According to Planck, a material object's energy should be thought of as consisting of an integer number of discrete, equal-sized pieces. Einstein proposed that light itself may explain the photoelectric effect.

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The process that is responsible for moving molecules from an area of high concentration to an area of low concentration is diffusion. The part of the circulatory system in which this happen is the alveoli.

Diffusion is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space.

For example, someone is opening a bottle of perfume in a room filled with people. The perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the bottle, and gradually, more and more people will smell the perfume as it spreads.

In a process called diffusion, oxygen moves from the alveoli to the blood through the capillaries (tiny blood vessels) lining the alveolar walls.

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22.7 liters approx volume of hydrogen gas is produced when 96.7 g of sodium reacts completely according to the following reaction at 25 degree C and 1 atm.

The chemical equation for the reaction is:

2Na(s) + 2H2O(l) -> 2NaOH(aq) + H2(g)

To calculate the volume of hydrogen gas produced, we first need to determine the number of moles of hydrogen produced. We can do this by using the molar mass of hydrogen and the mass of sodium that reacts. First, we convert the mass of sodium from grams to moles:

49.7 g Na / 22.99 g/mol = 2.17 mol Na

Since the chemical equation tells us that 2 mol of Na produce 1 mol of H2, we can use the mole ratio to calculate the number of moles of hydrogen produced:

2.17 mol Na * (1 mol H2 / 2 mol Na) = 1.09 mol H2

Next, we use the ideal gas law to calculate the volume of hydrogen gas produced at a temperature of 25 °C and a pressure of 1 atm:

V = (n * R * T) / P

where V is the volume of the gas, n is the number of moles, R is the gas constant, T is the temperature in Kelvin, and P is the pressure.

Putting values, we get:

V = (1.09 mol * 8.31 J/mol*K * 298 K) / 1 atm

= 22.7 L

So, the volume of hydrogen gas produced is approximately 22.7 liters.

It's important to note that this calculation assumes that the reaction goes to completion and that the hydrogen gas behaves as an ideal gas. In real-world situations, these assumptions may not always hold, so the actual volume of hydrogen gas produced may be different.

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Question - What volume of hydrogen gas is produced when 49.7 g of sodium reacts completely according to the following reaction at 25 °C and 1 atm?

2Na(s) + 2H2O(l) -> 2NaOH(aq) + H2(g)

The right response, according to the definition of the heat of vaporization, is that 52.8 kJ is required to totally evaporate 23.4 g of water.

40.6 kJ/mole is the heat of vaporization for water at its boiling point. In other words, 40.6 kJ of energy is needed to convert a mole of liquid water into a mole of gas at a constant temperature.

The amount of mass that a substance holds in one mole is known as its molar mass. The water in this instance has a molar mass of 18 g/mol. The following formula can be used to determine how many moles 23.4 g of the chemical contains:

[tex]23.4 grams x\frac{1 mole}{18 grams} = 1.3 moles[/tex]

Then you can use the rule of three as follows: How much heat of vaporization is needed to vaporize 1.3 moles of water if 1 mole of water costs 40.6 kJ?

[tex]heat = \frac{1.3 moles * 40.6kJ}{1 mole}[/tex]

52.78 kJ 52.8 kJ = heat

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The statement 'reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms' is true.

Phagocytic cells are the kind of cells that consume or destroy microorganisms by producing substances that are harmful to them, according to the study of biology.

The phagocytic cells produce oxygen and nitrogen intermediates, and these intermediates are reactive enough to bind to the chemicals in the microbe and inhibit their function. The microorganism dies when its activities are impeded to the point where it is unable to carry out the fundamental functions of life. Thus, the above statement is accurate.

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An electron will not posses  the quantum numbers n = 1, l = 1, ml = 1.

Quantum numbers may be the number sequence utilized to express the location and velocity of an electron within an atom. The primary, azimuthal, magnetic, as well as spin quantum numbers are just the four types of quantum numbers.

Wolfgang Pauli established the Pauli Exclusion Principle in 1926, which states that each electron has a special combination of quantum numbers. In other words, the values of n, l, ml, and ms cannot be like for pair of electrons.

-- The given question is incomplete, the complete question is:

"An electron cannot have the quantum numbers__"n = ________, l = ________, ml = ________.

A) 2, 0, 0

B) 2, 1, -1

C) 3, 1, -1

D) 1, 1, 1

E) 3, 2, 1" --

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Starting with a 1.35 m HCl stock solution, five standard solutions are prepared by sequentially diluting 5.00 ml of each solution to 100.0 ml. The concentration of the final solution after 5 dilutions is [tex]\rm 4.22 \times 10^{-7} M[/tex].

Dilution in chemistry is the process of lowering a solute's concentration in a solution by incorporating more solvent. Dilution is the process of lowering the solute concentration per unit volume while maintaining a constant solute concentration overall. As a result, the fluid becomes less concentrated or more diluted.

Volume of Stock Solution = 5 mL

                                          = (5 mL)(1 L/1000 mL)

                                           = 0.005 L

Moles of HCl = (1.35 mol/L)(0.005 L)

                     = [tex]\rm 6.75 \times 10^{-3}[/tex] mol

Dilution 1:-

Volume of Solution = 100 mL

                                = (100 mL)(1 L/1000 mL)

                                = 0.100 L

Molarity After 1st Dilution = ([tex]\rm 6.75 \times 10^{-3}[/tex] mol)/(0.100 L)

                                         = [tex]\rm 6.75 \times 10^{-2}[/tex] mol/L

Volume of Solution Taken = 5 mL

                                          = (5 mL)(1 L/1000 mL)

                                          = 0.005 L

Moles of HCl = ([tex]\rm 6.75 \times 10^{-4 }[/tex]mol/L)(0.005 L)

                    =[tex]\rm 3.375 \times 10^{-4}[/tex] mol

Dilution 2:-

Volume of Solution = 100 mL

                                = (100 mL)(1 L/1000 mL)

                                = 0.100 L

Molarity After 2nd Dilution = ([tex]\rm 3.375 \times 10^{-4 }[/tex]mol)/(0.100 L)

                                            =[tex]\rm 3.375 \times 10^{-3}[/tex] mol/L

Volume of Solution Taken = 5 mL

                                            = (5 mL)(1 L/1000 mL)

                                          = 0.005 L

Moles of HCl = ([tex]\rm 3.375 \times 10^{-3}[/tex] mol/L)(0.005 L)

                     = [tex]\rm 1.6875 \times 10-5[/tex] mol

Dilution 3:-

Volume of Solution = 100 mL

                                = (100 mL)(1 L/1000 mL)

                               = 0.100 L

Molarity After 3rd Dilution = ([tex]\rm1.6875 \times 10^{-5 }[/tex]mol)/(0.100 L)

                                           = [tex]\rm 1.6875 \times 10^{-4}[/tex] mol/L

Volume of Solution Taken = 5 mL

                                           = (5 mL)(1 L/1000 mL)

                                           = 0.005 L

Moles of HCl = ([tex]\rm 1.6875 \times 10^{-4}[/tex] mol/L)(0.005 L)

                      = [tex]\rm 8.4375 \times 10^{-7}[/tex] mol

Dilution 4:-

Volume of Solution = 100 mL

                               = (100 mL)(1 L/1000 mL)

                               = 0.100 L

Molarity After 4th Dilution = ([tex]\rm 8.4375 \times 10^{-7 }[/tex]mol)/(0.100 L)

                                          =[tex]\rm 8.4375 \times 10^{-6}[/tex] mol/L

Volume of Solution Taken = 5 mL

                                            = (5 mL)(1 L/1000 mL)

                                            = 0.005 L

Moles of HCl = ([tex]\rm 8.4375 \times 10^{-6 }[/tex]mol/L)(0.005 L)

                      = [tex]\rm 4.21875 \times 10^{-8}[/tex] mol

Dilution 5:-

Volume of Solution = 100 mL

                                 = (100 mL)(1 L/1000 mL)

                                = 0.100 L

Molarity After 5th Dilution = ([tex]\rm 4.21875 \times 10^{-8}[/tex] mol)/(0.100 L)

                                           =[tex]\rm 4.21875 \times 10^{-7}[/tex] mol/L

                                          = [tex]\rm 4.22 \times 10^{-7}[/tex] mol/L

                                          =[tex]\rm 4.22 \times 10^{-7}[/tex] M

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These are some of the important functions of the cytokinesis hormone in plants :-

Cytokinesis is a group of growth regulators that is found in plants. It helps in performing cell divison of plant roots, and shoot system. It also helps in promoting the cell's growth, development, flowering, and seed formation.

It helps in the protein production which is important for mitosis. It provides resistance against certain diseases causing bacteria in crops. It mainly contains Nitrogen, Hydrogen, and a few atoms of oxygen in its structure.

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The options for the function of cytokinesis should be:

(A) performing cell division in plant roots

(B) shoot system

(C) promoting the cell’s growth, development

(D) All of these

Answer - (D) All of these

The probability density goes to zero al0ng the 'XY' and 'XZ' planes. Therefore, options A:  XY and B:  XZ are correct.

The probability density is a function for which the integral is calculated to find probabilities associated with a continuous random variable. The graph of the probability density is a curve above the horizontal axis that indicates a total area, between itself and the axis, of 1.

Along XY and XZ planes, the probability density goes to zero. Zero probability density means zero chance of noticing the particle in that state.

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The NMDA receptor is unusual in that it is voltage-dependent and neurotransmitter- dependent.

N-methyl-D-aspartate receptors (also known as NMDA receptors or NMDARs) are glutamate receptors and ion channels found in neurons. The NMDA receptor is one of three ionotropic glutamate receptors, the other two being the AMPA and kainate receptors. Depending on its subunit composition, its ligands are glutamate and glycine (or D-serine). However, ligand binding is usually not sufficient to open the channel, as it can be blocked by Mg2+ ions, which are removed only when the neuron is sufficiently depolarized.

Functional NMDA receptors are heterotetramers composed of two GluN1 subunits and usually two GluN2 subunits. There are one GluN1, four GluN2, and two GluN3 subunits encoding genes, and each gene can generate multiple splice variants. NMDA receptors regulate the development of neuron-specific excitability through cell-autonomous mechanisms. The maturation of neuronal and synaptic functions during childhood is essential for neural circuit and behavioral development.

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Answer:

b. h and o are likely to form covalent bond

Neither of the two systems on the right, upland or lowland, is characterized by a stable equilibrium.

Uplands and lowlands are parts of plains that are classified based on their height above sea level. Lowlands are usually below 200 m (660 ft), while highlands range from 200 m (660 ft) to 500 m (1,600 ft).

Upland soils have a sandy loam texture, but vary in rock and organic matter content depending on the location of the landscape. Upland soils develop on top of moraine deposits of base-rich volcanic rock and support orthotic, brunisolein, or dark gray rubisol.

The Lowland series consists of very deep and well-drained soils formed by great volcanic and slope flooding. These soils are found in fans, mountains and hills. The slope is 4-60%.

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The enthalpy of fusion is defined as the enthalpy change that occurs when a substance changes from a solid to a liquid at its melting point. The value of ΔS for molten gallium is 1.29 J/K.

The equation for calculation of ΔS is given as,

ΔS = ΔHfus / T

where, ΔHfus is the molar enthalpy of fusion and T is the temperature at which the process occurs.

In the above case, given that,

T = 29.8° C = 303.15 K

Substituting these values we get,

ΔS = (5.59 kJ/mol) / (303.15 K) = 0.0185 J/K

The change in entropy is positive which is because the substance is changing from a more ordered state (a solid) to a less ordered state (a liquid).

For calculating the change in entropy when 70.0 g of Ga(l) solidifies at 29.8° C, we can use the equation given below,

ΔS = m × ΔS/mol

where, m is the mass of the substance in grams, and ΔS/mol is the change in entropy per mole of the substance.

In the above case, given that

m = 70.0 g

ΔS/mol = 0.0185 J/K

Substituting the values we get,

ΔS = (70.0 g) × (0.0185 J/K) = 1.29 J/K

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Answer:

Explanation:

as we know in a face-centered unit each atom give1/2 a portion at the face

and fully atom involvement at center therefore  

1/2( total face of cube )+ 1(centre)

1/2 ×6 + 1

3+ 1

4 atoms per cell