tungsten has a radius of 141 pm and crystallizes in a body-centered cubic structure. what is the edge length of the unit cell?

Answer:

The reverse reaction is occurring at a faster rate than the forward reaction.

Explanation:

When the reaction:

aA + bB ⇔ cC + dD

has not reached the balance, it is possible to calculate:

\(Qc=\frac{[C]^{c}*[D]^{d} }{[A]^{a}*[B]^{b} }\)

where Q is called the reaction quotient, and the concentrations expressed in it are not the equilibrium concentrations, but other concentrations given at a time of the reaction.

Comparing Qc with Kc allows to find out the status and evolution of the system:

In the case of the reaction:

N₂ (g) + O₂ (g) ⇄ 2 NO (g)

\(Qc=\frac{[NO]^{2} }{[N_{2} ]*[O_{2} ] }\)

Being:

and replacing:

\(Qc=\frac{0.10^{2} }{0.80*0.050 }\)

you get:

Qc= 0.25

Being Kc=0.10, Qc>Kc.  Then the system is not in equilibrium and will evolve to the left to increase the concentration of reagents. So, the reverse reaction is occurring at a faster rate than the forward reaction.

The molar mass of hemoglobin is 7.73 x 10⁻⁴ g/mol. Hemoglobin is a protein found in red blood cells (erythrocytes) that plays a crucial role in transporting oxygen throughout the body.

To calculate the molar mass of hemoglobin, we need to use the information that hemoglobin has 4 iron atoms per molecule and contains 0.40% iron by mass.

Since iron has a molar mass of 55.845 g/mol, we can calculate the mass of iron in one mole of hemoglobin as follows:

Mass of iron in one mole of hemoglobin = (4 iron atoms/molecule) x (1 mole hemoglobin/6.022 x 10²³ molecules) x (55.845 g/mol iron) = 1.86 x 10⁻²³ g

Next, we can use the percent composition of iron in hemoglobin to calculate the mass of hemoglobin that contains 1 mole of iron:

Mass of hemoglobin containing 1 mole of iron = (1 mole iron/0.40% iron by mass) x (1.86 x 10⁻²⁰ g iron/mole)

= 4.65 x 10⁻¹⁸ g

Finally, we can calculate the molar mass of hemoglobin by dividing the mass of hemoglobin containing 1 mole of iron by the number of moles of hemoglobin in that mass:

Molar mass of hemoglobin = (4.65 x 10^-18 g hemoglobin) / (6.022 x 10⁻²³ molecules/mole) = 7.73 x 10⁻⁴ g/mol

Therefore, the molar mass of hemoglobin is 7.73 x 10⁻⁴ g/mol.

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Answer:

The pattern of change in the electron configuration increases from left to right across the period.

Explanation:

In the periodic table, elements having the same number of electrons in the outermost shell of their atoms are placed over one another in vertical columns. Each of the vertical columns is known as a group or family. while each of the resulting horizontal rows is known as a period or row.

There are 18 vertical columns and seven periods in the periodic table. Each period begins with an atom having a valence electron and ends with an atom having a complete outer shell structure of an inert gas.

The fourth period of the periodic table (d-block) consists of the transition elements.

The electron distribution into the energy levels of sublevels of atoms  can be shown in any of the tree important electronic configuration.

Electronic configuration shows the sequence of filling electrons into the orbitals of the sublevels as guided by some principles.

The maximum number of electrons in the orbitals of sublevels are two for s-sublevel(one orbital) ; six for p-sublevel( three orbital); ten for d-sublevel ( five orbitals) and fourteen for f-sublevel( seven orbitals). This indicates that the maximum number of electrons in an orbital is two

In the Periodic table ,The sublevels with lower energies are filled  up before those with higher energies. One important thing about this principle is that the sublevels do not fill up in numerical order. The pattern of filling is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f etc.

Answer:

In the electron configuration of potassium, I observe that after the 3p orbital is filled, the next electron enters the 4s orbital instead of the 3d orbital because 3d is at a higher energy than 4s. This pattern shows that orbitals fill up according to the Aufbau principle. As I move on right, the number of electrons increases by one for each element until vanadium is reached. The electron configuration of chromium shows all Half-filled orbitals in the 4s and 3d energy levels. Again, as I move right, an exception occurs at copper. Copper’s electron configuration shows completely filled 4s and 3d orbitals. This is an exception to the Aufbau principle to attain more stable electron configurations, whenever possible. Half-filled electron configurations are more stable than other configurations and completely filled electron configurations are the most stable.

The Correct representation of arrows are Arrow A :  74.6 kJ, Arrow B : Exothermic, Arrow C :  has a magnitude that is less than that of B, Arrow D : represents the overall enthalpy of reaction

Those reactions which releases energy are called as exothermic reactions.

Correct representations of arrows based on the diagram ;

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Answer:

The above answers are correct! If you want it a little more simply tho:

Arrow A: Option A

Arrow B: Option B

Arrow C: Option B

Arrow D: Option C

Explanation:

Hope this gave a little more clarification!

Have a great day :)

Brainliest would be great :D

Answer:

Water is a polar covalent compound since it has Oxygen and Hydrogen which are 2 non-metals and the atoms have an unequal distribution of charge.  Oxygen has δ- since it is more electronegative and Hydrogen has δ+. The shape of the water molecule is not symmetrical and dipoles are cancelled out making it a polar covalent compound.

Answer:

it is colourless

Explanation:

its tastleś

The value of Gibbs free energy is 143876.5 joules

The maximum amount of work that can be accomplished by a thermodynamically closed system at constant temperature and pressure can be calculated using the Gibbs free energy (also known as Gibbs energy; symbol: Δ G). Additionally, it offers a prerequisite for any processes like chemical reactions that might take place in such circumstances.

The maximum amount of non-expansion work that can be taken from a closed system (one that may exchange heat and work with its surroundings but not matter) at fixed temperature and pressure is known as the Gibbs free energy change (ΔG =ΔH - TΔS), measured in joules in SI. This maximum is only possible with a fully reversible method. Under these circumstances, when a system changes reversibly from an initial state to a final state, the reduction in Gibbs free energy is equal to the work performed by the system on its surroundings less the work of the pressure forces.

ΔH=-158 kj = enthalpy change

T=655k = temperature

ΔS=-219.9 j/k = entropy

ΔG =ΔH - TΔS

     =-158 -(655 x -219.9)

    = -158 -(-144034.5)

    =143876.5 joules

so, the value of Gibbs free energy is 143876.5 joules

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Answer:

I guess quantitative data is countable or measurable, relating to numbers; qualitative data is descriptive, relating to words. Quantitative data lends itself to statistical analysis; qualitative data is grouped and categorized according to themes.

Explanation:

Answer:

quantitative - actual numbers as data

Qualitative- uses senses (taste, touch, etc.)

Explanation:

The color of the indicator will correspond to the pH values of either acidic or basic substances.

pH values are values which are obtained from taking the negative logarithm to base ten of the hydrogen ions concentration of a substance.

pH values of acidic substances are less than 7 while the pH of basic or alkaline substances are greater than 7.

An indicator is an organic dye which changes colour according to the pH of a substance.

Examples of indicators are methyl orange and phenolphthalein.

Therefore, the color of the indicator will correspond to pglh values of either acidic or basic substances.

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The following solutions has an osmolarity of 4.0 is given as: 2.0 M KBr .

osmolarity = molarity × n ( number of dissociate particles)

a) 0.3 M NaCl

NaCl ----->   Na   + Cl

osmolarity = 0.3 × 2

                  = 0.2 osmol

b) 2.0 M KBr

KBr --->  K  +   Br

osmolarity = 2 × 2

                  = 4 osmol

c) 1.0 M Fe₂O₃

Fe₂O₃   ----->   2Fe³⁺    +    3O²⁻

osmolarity = 1 × 5

                  = 5 osmol

d) 1 M MgCl₂

MgCl₂   ----->   Mg²⁺    +   2Cl⁻

osmolarity = 1 × 3

                  = 3 osmol

e) 1.5  M AlCl₃

AlCl₃    ---->    Al³⁺   +  3Cl⁻

osmolarity = 1.5 × 4

                  = 6

Thus, The following solutions has an osmolarity of 4.0 is as: 2.0 M KBr .

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The balanced chemical equation is:

0.5C7H16 + O2 → 0.5CO2 + H2O

For balancing the chemical equation C7H16 + O2 → CO2 + H2O, we can use linear algebraic techniques. We need to determine the coefficients that balance the number of atoms on both sides of the equation.

Let's denote the coefficients for C7H16, O2, CO2, and H2O as a, b, c, and d, respectively.

The balanced chemical equation can be written as:

aC7H16 + bO2 → cCO2 + dH2O

To balance the carbon (C) atoms, we have:

7a = c (Equation 1)

To balance the hydrogen (H) atoms, we have:

16a = 2d (Equation 2)

To balance the oxygen (O) atoms, we have:

2b = 2c + d (Equation 3)

We have three equations (Equations 1, 2, and 3) and four unknowns (a, b, c, d). To solve this system of equations, we can write it in matrix form and find the solution using linear algebraic techniques.

The augmented matrix for the system of equations is:

[ 7 0 -1 0 | 0 ]

[ 0 0 0 -2 | 0 ]

[ 0 -2 2 -1 | 0 ]

By performing row operations to row-reduce the augmented matrix, we can obtain the solution:

[ 1 0 -0.5 0 ]

[ 0 1 -1 -0.5 ]

[ 0 0 0 0 ]

The solution to the system of equations is:

a = 0.5

b = 1

c = 0.5

d = 1

Putting the values of a,b,c, and d we get the balanced chemical equation as:

0.5C7H16 + O2 → 0.5CO2 + H2O

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Answer:

Silver ions.

Explanation:

The most extensively studied nanomaterials for water purification and treatment mainly includes zero-valent metal nanoparticles, metal oxides nanoparticles, carbon nanotubules and nanocomposites.

Answer:

A double displacement reaction is a type of reaction in which two reactants exchange ions to form two new compounds. Double displacement reactions typically result in the formation of a product that is a precipitate

Explanation:

Mark me as brainlist. Hope this helps you.

Answer:

smell accordingly so that I can't diffuse the air and reach your nose

A perfume must easily evaporate so that the particles can diffuse through the air and reach your nose. The missing word in this sentence is evaporate.

Evaporation is also called as vaporization which is takes place on the surface of a liquid as it transitions into the gas phase. High concentrations of the chemical that is evaporating slow down evaporation by a significant amount in the surrounding gas.

Evaporation is a surface phenomenon because it occurs when molecules with higher kinetic energy from the top layer of the liquid escape into the air.

Diffusion is a process where particles travel from a highly concentrated location to a less concentrated area.

Thus, A perfume must easily evaporate so that the particles can diffuse through the air and reach your nose.

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The mass defect of an atom of 110Sn is 0.0921 amu/atom. This small difference in mass is due to the conversion of some of the mass of the individual particles into binding energy, as described by Einstein's famous equation, E=mc².

To calculate the mass defect of an atom of 110Sn, we need to first determine its theoretical mass based on the sum of its individual particles.

110Sn has 50 protons, 60 neutrons, and 50 electrons. The mass of a proton and neutron are approximately 1 atomic mass unit (amu), while the mass of an electron is negligible in comparison. Therefore, the theoretical mass of 110Sn can be calculated as:

(50 protons x 1 amu/proton) + (60 neutrons x 1 amu/neutron) = 110 amu

However, the actual measured mass of 110Sn is 109.907858 amu. This difference in mass, known as the mass defect, can be calculated as:

mass defect = theoretical mass - actual mass

mass defect = 110 amu - 109.907858 amu

mass defect = 0.0921 amu/atom

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Answer:

C. from the deep ocean to a trench

Answer:

C

Explanation:

ape x

Answer:

Explanation:Due to the mental pressure,

                       Due to peer pressure,

                      Lack of love and affection from the family members.

                      Influence from the T.V advertisement.

Answer:

1 AMU

Explanation:

Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus.

The solubility product constant (Ksp) is the equilibrium constant for a chemical reaction in which a solid substance separates into its constituent ions in water. The solubility product (Ksp) can be used to measure the maximum solubility of a compound in water.

The solubility product of a compound can be calculated by multiplying the concentrations of the ions in the solution that results from dissolving the compound in water. The solubility product of AgCl, SrSO4, Ag2CO3, and Sr(IO3)2 is determined using the virtual lab.The virtual lab was utilized to determine the solubility product (Ksp) for AgCl, SrSO4, Ag2CO3, and Sr(IO3)2. The molar concentration of each compound was determined and used to calculate the solubility product. The calculated values were as follows:

AgCl: 1.16 × 10-10SrSO4: 3.71 × 10-7Ag2CO3: 7.59 × 10-12Sr(IO3)2: 4.67 × 10-12

The solubility of the solids listed in question 2 in moles/liter is obtained by using the solubility product. The formula for calculating the solubility of a substance is given as √Ksp. Therefore, the solubility of the substances listed in question 2 in moles/liter are as follows:

AgCl: 1.08 × 10-5SrSO4: 6.10 × 10-3Ag2CO3: 8.70 × 10-6Sr(IO3)2: 6.83 × 10-6

In conclusion, the solubility product of AgCl, SrSO4, Ag2CO3, and Sr(IO3)2 is determined using the virtual lab. The solubility of the compounds in question 2 was calculated using the solubility product constant. The solubility of the substances in moles/liter was determined to be AgCl: 1.08 × 10-5, SrSO4: 6.10 × 10-3, Ag2CO3: 8.70 × 10-6, and Sr(IO3)2: 6.83 × 10-6.

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Answer:

No it is not, most bacteria is very helpful, it helps the body function and fight off diseases when the body is sick. Sometimes the good bacteria can't fight off the bad bacteria and will cause you to have to buy antibiotics. The antibiotics give the body a huge advantage at fighting off the disease and the body goes back to normal.

Answer:

C. Our eating habits

Hope that helps.

The Tricyglycerol yields more energy on oxidation is the one containing three residues of stearic acid because it get fully reduced.

when atom or ion loses the electron in the process called as oxidation or the loss of hydrogen is called as oxidation. when the atom or ion gain electron  in the process called as reduction or gain of hydrogen is called as reduction

when the oxidation takes place  the oxidation state of atom increases and when reduction takes place the oxidation state of species decreases.

when molecule is oxidized, it loses energy and when molecule is reduced , it gains energy

Thus ,we can say that,The triacyglycerol cotaining the three stearic acid residues yield more energy because it is fully reduced.

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When aluminum is reacts copper (II) chloride then it will form aluminum chloride and Copper.

Aluminum as well as copper(II) chloride combine very vigorously, causing the reaction mixture to become extremely hot as heat was produced, the aluminum foil to breakdown, a reddish brown solid to appear, as well as gas bubbles to be released.

The chemical reaction can be written as:

2Al + 3CuCl2 → 3Cu + 2AlCl3

Therefore, Copper and aluminum chloride will be formed after the reaction as a product.

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Answer: It should a accepter

Explanation: because water is often used as solvent for solutes...there are exceptions

Water can act as both a proton donor (acid) and a proton acceptor (base) depending on the context of the reaction.

As a proton donor (acid):

In an acidic reaction, water can donate a proton (H+) to another substance. For example, in the reaction with hydrochloric acid (HCl):

H₂O + HCl → H₃O⁺ + Cl⁻

In this reaction, water donates a proton (H⁺) to chloride ion (Cl⁻) to form hydronium ion (H₃O⁺). Here, water acts as a proton donor (acid).

As a proton acceptor (base):

In a basic reaction, water can accept a proton (H+) from another substance. For example, in the reaction with ammonia (NH₃):

H₂O + NH₃ → OH⁻+ NH₄⁺

In this reaction, water accepts a proton (H⁺) from ammonia (NH₃) to form hydroxide ion (OH-) and ammonium ion (NH₄⁺). Here, water acts as a proton acceptor (base).

Water's ability to act as both a proton donor and a proton acceptor makes it amphoteric, meaning it can behave as an acid or a base depending on the specific reaction and the substances involved.

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Answer:

A. a rotten potato gives all of bad smell

Explanation:

B,C,D are all physical changes because we can reverse them back.we can cool the water back to make ice. if the wind passes again we can randomly get the same cloud shape in c. and in d we can make that statue again. but in A can we reverse the rotting process ? ( the enzyme reaction) no we cant because it is a chemical reaction it gives a bad smell because of the chemical changes occuring in it.

hope this helps

Nicole can access global markets through distributors while avoiding logistical problems and several trade-related concerns. Specialty shops tend to be more expensive and have less choice. at last, Nicole will pay more for the mattress if she gets it at the specialty store.

The simplicity of employing a distributor is its key benefit. Typically, the distributor is in charge of the packaging, shipping, and associated paperwork for customs. The concentrate on a specific class of products that a specialty store has is one of its main advantages. This offers business owners and staff the ability to gain knowledge and a reputation for selection and competence within the store's designated specialization.

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A. Buffering, The ability of a solution to minimise significant pH changes after the addition of a basic or acid is referred to as buffering capability.

The right response is A, or buffering capacity. When an acid or base is introduced to a solution, its buffering capacity determines how well it can withstand pH variations. This characteristic plays a crucial role in keeping biological systems' pH levels stable as well as in industrial operations that demand a constant pH. In order to prevent significant variations in pH, buffers react with extra hydrogen ions (H+) or hydroxide ions (OH-). When an amount of additional acid or base is neutralised by a solution with a high buffering capacity, the pH is little affected.

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The products in the equation would be  \(CO_2\), \(SO_2\), and \(H_2O\).

From the equation of the reaction:

\(CH_3SH + 4O_2 --- > CO_2 + SO_2 +2H_2O\)

The products are \(CO_2\), \(SO_2\), and \(H_2O\).

This is because, for every chemical equation, the reactants are always at the back of arrows while products are at the front of arrows. In other words, reactants are usually on the left-hand side while products are on the right-hand side.

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Answer:

Explanation: First one is Purple, purple, White.

Hairy, Hairy, Non hairy.

Answer:

Any dominant trait (capital letter) will dominate the recessive trait (lowercase letter)

Explanation:

Any letter combo with the dominant trait will have that dominant trait. The only time the recessive trait will come through is if it is a double lowercase letter. Ex. PP=purple flower Pp= Purple flower and pp= white flower

Answer:

Explanation:

a substance's enthalpy of fusion tells you how much heat is needed in order to convert

1 g

of said substance from solid at its melting point to liquid at its melting point.

In water's case, an enthalpy of fusion equal to

333.55 J g

−

1

tells you that

1 g

of ice at

0

∘

C

can be converted to

1 g

of liquid water at

0

∘

C

by supplying

333.55 J

of heat.

Your ice cube has a mass of

55.0 g

, which means that it will require

55.0

g

⋅

=

Δ

H

fus



333.55 J

1

g

=

18,345.25 J

Rounded to three sig figs, the number of sig figs you have for the mass of the ice cube, the answer will be

heat needed

=

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

18,300 J

a

a

∣

∣

−−−−−−−−−−

Answer:

4 4 8 4 is the balanced equation