Which of the following notations is the correct noble gas configuration for
Co?
A. [Kr]4524p640
B. [Ar]452307
C. [Co]4s23 d?
D. [Ar]4524p63.0

Answer:

To find the pressure at which the solubility of the gas would be 0.2 g/L, we can use the concept of Henry's Law. Henry's Law states that the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid.

The equation for Henry's Law is:

S = k * P

Where:

S is the solubility of the gas in the liquid (in g/L)

k is the Henry's Law constant (which depends on the specific gas and liquid)

P is the partial pressure of the gas above the liquid (in atm)

We can set up a proportion to find the unknown pressure (P2) when the solubility (S2) is 0.2 g/L:

S1 / P1 = S2 / P2

Substituting the given values:

0.028 g/L / 3.5 atm = 0.2 g/L / P2

Now we can solve for P2:

P2 = (0.2 g/L * 3.5 atm) / 0.028 g/L

P2 = 24.5 atm

Therefore, at a pressure of 24.5 atm, the solubility of the gas would be 0.2 g/L.

Based on the redox equations;

The emf of the cell, E°cell of the cells formed from the half-reactions is 0.21 V

Reducing agents are substances which donates electrons and are oxidized in a redox reaction.

Oxidizing agents are substances which accept electrons and are reduced in a redox reaction.

From the given the redox equations:

a) O_2(g) + NO(g) + H_2O(l) → NO_3^{-}(aq) + H^{+}(aq)

b) CrO_4^{2-}(aq) + H_2O(l) + Cu(s) → Cr(OH)_3(s) + Cu(OH)_2(s) + OH^{-}(aq)

2. The emf of the cell, E°cell = E°red - E°oxi

In the cell, copper is reduced while tin is oxidized.

E°cell = (0.34 - 0.13) V

E°cell = 0.21 V

Therefore, the emf of the cell, E°cell is 0.21 V

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Answer:

substance c solid, substance a liquid, and substance b gas

Explanation:

\(\\ \sf\longmapsto HC_2H_3O_2\)

\(\\ \sf\longmapsto 1u+2(12u)+3(1u)+2(16u)\)

\(\\ \sf\longmapsto 1u+24u+3u+48u\)

\(\\ \sf\longmapsto 28u+48u\)

\(\\ \sf\longmapsto 76u\)

\(\\ \sf\longmapsto 76g/mol\)

\(\\ \sf\longmapsto No\:of\;moles=\dfrac{Given\:Mass}{Molar\:Mass}\)

\(\\ \sf\longmapsto 0.2=\dfrac{Given\:mass}{76}\)

\(\\ \sf\longmapsto Given\:Mass=0.2\times 76\)

\(\\ \sf\longmapsto Given\:Mass=1.52g\)

Answer:

During the early Paleozoic Era, the Earth's surface was very different from what it is today. The continents were arranged differently, forming one large supercontinent called Pangea. This landmass was surrounded by a single large ocean called Panthalassa. The climate was much warmer and wetter than it is today, with no ice caps at the poles.

The first land plants, known as bryophytes, appeared during the early Silurian Period, around 430 million years ago. These plants were small and simple, lacking roots and vascular tissue. They grew in damp environments, such as along the edges of lakes and streams. They were important in the development of soils and in the colonization of land by other organisms, such as insects and other arthropods.

The conjugate base of the specie HS^- is S^-

We know that form the Bronsted Lowry perspective of the acid and the base, the acid is the substance that can be able to give out a proton while the base is the kind of substance that can be able to accept a proton.

We can see here that the conjugate base is the specie that can be obtained by the loss of a proton from the HS^- as such we would have it as S^-.

Hence, we can see that the base that is the conjugate base in this sense is S^-.

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If heat is going into the system, then energy must have come out from the surroundings.

If heat is entering a system, it means that the system is gaining thermal energy, which can lead to an increase in temperature, changes in state, or other effects depending on the nature of the system and the heat transfer mechanism.

The first law of thermodynamics, also known as the law of conservation of energy, states that the total amount of energy in a closed system remains constant, and energy can neither be created nor destroyed, only transferred or converted from one form to another.

When heat enters a system, it is either used to increase the internal energy of the system or to perform work, such as moving a piston or driving an electrical generator.

The amount of heat transferred to a system can be quantified using the equation Q = mcΔT, where Q is the heat transferred, m is the mass of the substance, c is its specific heat capacity, and ΔT is the change in temperature.

Therefore, if the system is gaining energy in the form of heat, then the surroundings (the rest of the universe) must be losing that same amount of energy. This is because energy is conserved.

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Answer:

Explanation:

aluminum

Answer: The aluminum ion

Explanation:

The average atomic mass of titanium on the given planet is approximately 46.68164 atomic mass units (u). The average atomic mass may vary depending on the specific isotopic composition of titanium found on different celestial bodies or regions.

To calculate the average atomic mass of titanium on the given planet, we need to consider the natural abundances and masses of each isotope of titanium.

The average atomic mass is calculated by multiplying the natural abundance of each isotope by its respective mass and summing them up.

Let's perform the calculation step by step:

Step 1: Multiply the abundance of each isotope by its mass:

(73.700% * 45.95263 u) + (15.000% * 47.94795 u) + (11.300% * 49.94479 u)

Step 2: Calculate the individual contributions from each isotope:

= (0.737 * 45.95263) + (0.150 * 47.94795) + (0.113 * 49.94479)

Step 3: Add up the individual contributions:

= 33.84765431 + 7.1921925 + 5.64179347

Step 4: Sum up the contributions:

= 46.68164 u

Therefore, the average atomic mass of titanium on the given planet is approximately 46.68164 atomic mass units (u).

It's important to note that the calculation assumes the provided natural abundances are accurate and representative of the titanium isotopes on that planet.

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The balanced equation is:

Chemical equation is simply a representation of chemical reaction with symbols and formula of the reactants and products involved in the reaction.

The balancing of chemical equation is guided by the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one for to the other.

Thus, an unbalanced equation simply means that matter has been created or destroyed.

Now, we shall balance the equation given in the question as follow:

C₆H₆ + O₂ —> H₂O + CO₂

There are 6 atoms of H on the left side and 2 atoms on the right side. It can be balance by writing 3 before H₂O as shown below:

C₆H₆ + O₂ —> 3H₂O + CO₂

There are 6 atoms of C on the left side and 1 atom on the right side. It can be balance by writing 6 before CO₂ as shown below:

C₆H₆ + O₂ —> 3H₂O + 6CO₂

There are 2 atoms of O on the left side and a total of 15 atoms on the right side. It can be balance by writing \(\frac{15}{2}\) before O₂ as shown below:

C₆H₆ + \(\frac{15}{2}\)O₂ —> 3H₂O + 6CO₂

Multiply through by 2 to clear the fraction.

Now, the equation is balanced.

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Taking into account the Law of Conservation of Mass, the balanced reaction is:

2 C₆H₆ + 15 O₂ → 6 H₂O +  12 CO₂

In first place, you have to know that the Law of Conservation of Mass postulates that "mass is neither created nor destroyed, it only transforms."

This means that the reagents interact with each other and form new products with different physical and chemical properties than the reagents.

But the amount of matter or mass before and after the chemical reaction is always the same, that is, the amounts of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends.

So, since the mass of the reactants must be equal to the mass of the products, the number of atoms present in the reactants must be kept in the products. Therefore, the equation must be balanced.

To balance the chemical equation, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts.  

The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.

By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.

Then, taking into account all of the above, in this case you can determine the amount of elements on each side of the equation:

Left side: 6 C, 6 H and 2 O

Right side: 1 C, 2 H and 3 O

In first place, you can balanced the C:

C₆H₆ + O₂ → H₂O +  6 CO₂

Then, you have:

Left side: 6 C, 6 H and 2 O

Right side: 6 C, 2 H and 13 O

Now, balanced the H:

C₆H₆ + O₂ → 3 H₂O +  6 CO₂

Then, you have:

Left side: 6 C, 6 H and 2 O

Right side: 6 C, 6 H and 15 O

Finally, balanced the O:

C₆H₆ + \(\frac{15}{2}\) O₂ → 3 H₂O +  6 CO₂

Then, you have:

Left side: 6 C, 6 H and 15 O

Right side: 6 C, 6 H and 15 O

The reaction is balanced, but you can't balance a chemical equation with fractions, so multiplying all the stoichiometric coefficients by 2 finally obtains:

2 C₆H₆ + 15 O₂ → 6 H₂O +  12 CO₂

Finally, the balanced reaction is:

2 C₆H₆ + 15 O₂ → 6 H₂O +  12 CO₂

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Taking into account the reaction stoichiometry, if 10.3 g of Ca(OH)₂ reacts, 5.01 grams of H₂O are formed.

The balanced reaction is:

2 H₃PO₄ + 3 Ca(OH)₂  → 6 H₂O + Ca₃(PO₄)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 222 grams of Ca(OH)₂ form 108 grams of H₂O, 10.3 grams of Ca(OH)₂ form how much mass of H₂O?

mass of H₂O= (10.3 grams of Ca(OH)₂ ×108 grams of H₂O)÷ 222 grams of Ca(OH)₂

mass of H₂O= 5.01 grams

Finally, 5.01 grams of H₂O are formed.

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Answer:

Mass = 0.37 g

Explanation:

Given data:

Number of moles of sulfur = 11.9 mol

Mass of sulfur in 11.9 mol = ?

Molar mass of sulfur = 32.06 g

Solution:

Number of moles = mass/molar mass

by putting values,

11.9 mol = mass/ 32.06 g/mol

Mass = 11.9 mol × 32.06 g/mol

Mass = 0.37 g

16.52 milliliters of 8.54×10⁻² M Ba(OH)2(aq) are required to titrate 54.90 mL of 5.14×10⁻² M HNO₃

A titration is a procedure that uses a known solution to determine the concentration of an unknown solution. Until the reaction is finished, the titrant (the known solution) is typically supplied from a buret to a known volume of the analyte (the unknown solution).

Titration is an essential technique in analytical chemistry, and it is also known as volumetric analysis.

n-factor for Ba(OH)₂ =2

Thus, dilution equation becomes:

n × M₁V₁= M₂V₂

2 x 8.54 x 10⁻² x V₁ = 5.14 x 10⁻² x (54.90/1000)

V₁= 16.52 × 10⁻³¹

V₁   = 16.52 ml

Thus, 16.52 milliliters of 8.54×10⁻² M Ba(OH)2(aq) are required to titrate 54.90 mL of 5.14×10⁻² M HNO₃

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Answer:

Metal C

Explanation:

Density = mass (g)/ volume (mL, which is the same thing as cm cubed)

Divide mass by volume for each metal, the metal with the lowest value (metal C) is your answer.

Answer:

IT IS

NOT. I REPEAT - IT IS NOT> D

Explanation:

i got it wrong :(

Answer:

a.) 46.2 g C₄H₆O₃

b.) 163 g C₉H₈O₄

Explanation:

To find the masses of C₄H₆O₃ and C₉H₈O₄, you need to (1) convert grams C₇H₆O₃ to moles (via the molar mass), then (2) convert moles C₇H₆O₃ to moles C₄H₆O₃ / C₉H₈O₄ (via the mole-to-mole ratios from equation coefficients), and then (3) convert moles C₄H₆O₃ / C₉H₈O₄ to grams (via the molar mass). The final answers should have 3 significant figures.

Molar Mass (C₄H₆O₃): 4(12.011 g/mol) + 6(1.008 g/mol) + 3(15.998 g/mol)

Molar Mass (C₄H₆O₃): 102.086 g/mol

Molar Mass (C₇H₆O₃): 7(12.011 g/mol) + 6(1.008 g/mol) + 3(15.998 g/mol)

Molar Mass (C₇H₆O₃): 138.119 g/mol

Molar Mass (C₉H₈O₄): 9(12.011 g/mol) + 8(1.008 g/mol) + 4(15.998 g/mol)

Molar Mass (C₉H₈O₄): 180.155 g/mol

2 C₇H₆O₃ + 1 C₄H₆O₃ ------> 2 C₉H₈O₄ + H₂O
^                  ^                         ^

a.)

125 g C₇H₆O₃           1 mole             1 mole C₄H₆O₃           102.086 g
----------------------  x  ----------------  x  --------------------------  x  ------------------  =
                                138.119 g          2 moles C₇H₆O₃           1 mole

=  46.2 g C₄H₆O₃

b.)

125 g C₇H₆O₃           1 mole            2 moles C₉H₈O₄          180.155 g
----------------------  x  ----------------  x  --------------------------  x  ------------------  =
                                138.119 g          2 moles C₇H₆O₃           1 mole

=  163 g C₉H₈O₄

The enthalpy change (ΔH) for the reaction CaC(s) + H2O(I) → Ca(OH)(ag) + CH4(g) is -3617.6 kJ.

To calculate ΔH for the reaction CaC(s) + H2O(l) → Ca(OH)2(ag) + CH4(g), we can use Hess's law, which states that the enthalpy change of a reaction is independent of the pathway taken and depends only on the initial and final states.

We can manipulate the given reactions to obtain the desired reaction:

(i) Ca(s) + 2C(graphite) → CaC2(s) ΔH = X (unknown value)

(ii) Ca(s) + 1/2O2(g) → CaO(s) ΔH = -635.5 kJ

(iii) CaO(s) + H2O(l) → Ca(OH)2(ag) ΔH = -653.1 kJ

(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH = -1300.0 kJ

(v) C(graphite) + 1/2O2(g) → CO(g) ΔH = -393.5 kJ

Now, let's manipulate these equations to cancel out the common reactants and products and obtain the desired reaction:

(i) Ca(s) + 2C(graphite) → CaC2(s) ΔH = X

(ii) Ca(s) + 1/2O2(g) → CaO(s) ΔH = -635.5 kJ

(iii) CaO(s) + H2O(l) → Ca(OH)2(ag) ΔH = -653.1 kJ

(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH = -1300.0 kJ

(v) C(graphite) + 1/2O2(g) → CO(g) ΔH = -393.5 kJ

Now, let's sum up the equations to obtain the desired reaction:(i) Ca(s) + 2C(graphite) → CaC2(s) ΔH = X

(ii) 2Ca(s) + O2(g) → 2CaO(s) ΔH = -1271 kJ

(iii) CaO(s) + H2O(l) → Ca(OH)2(ag) ΔH = -653.1 kJ

(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH = -1300.0 kJ

(v) C(graphite) + 1/2O2(g) → CO(g) ΔH = -393.5 kJ

By adding equations (ii), (iii), (iv), and (v), we can cancel out CaO(s), H2O(l), and O2(g):

2Ca(s) + 2C(graphite) + CH4(g) → 2Ca(OH)2(ag) + CO(g) ΔH = X -1271 -653.1 -1300.0 -393.5

2Ca(s) + 2C(graphite) + CH4(g) → 2Ca(OH)2(ag) + CO(g) ΔH = X -3617.6 kJ

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Answer:

i dont know what you are saying

Explanation:

????????????

Answer is: A

pair of elements will most likely form an ionic bond if one is a metal and one is a nonmetal. These types of ionic compounds are composed of monatomic cations and anions..

Atoms such as iron and chlorine pairs are most likely to form an ionic bond. Thus,option A is correct.

A covalent bond is defined as  a chemical bond that includes the sharing of electron pair between atoms.The pair of electrons are know as bonding pairs and the stable balance of attractive and repulsive forces between atoms.

The properties of covalent bond are mentioned below:

The covalent compounds have low melting points and boiling points.The covalent compounds do not contain electricity.The covalent compounds are  having lower enthalpies of vaporization and fusion.

The covalent compounds are easily catches fire and are more flammable than ionic compounds.The covalent compounds are very soft and flexible.The physical properties of covalent compounds are that they have lower melting points and electrical conductivity.

Therefore,Atoms such as iron and chlorine pairs are most likely to form an ionic bond. Thus,option A is correct.

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Carbon-12 and Carbon-14 are considered isotopes of each other.

Isotopes are any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei.

This means that isotopes have the same atomic number but a different mass number.

According to this question, carbon-12 has a mass number of 12 while carbon-14 has a mass number of 14. The atomic number of both isotopic forms remain 12.

Therefore, it can be said that both carbon atoms are isotopes of one another.

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The temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

To determine the temperature of the gas in Kelvin after its volume is reduced, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature for a given amount of gas.

The combined gas law equation is:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, T₁ is the initial temperature in Kelvin, and T₂ is the final temperature in Kelvin.

Given that the initial volume V₁ is 3,480 mL, the initial temperature T₁ is -70.0 °C (which needs to be converted to Kelvin), and the final volume V₂ is 2,450 mL, we can substitute these values into the equation.

To convert -70.0 °C to Kelvin, we add 273.15 to it, resulting in T₁ = 203.15 K.

Now we can solve for T₂:

(T₂ * V₁) / T₁ = V₂

T₂ = (V₂ * T₁) / V₁ = (2,450 mL * 203.15 K) / 3,480 mL

Simplifying the equation, we find:

T₂ ≈ 143.27 K

Therefore, the temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

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Answer:

An acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance. A base is a molecule or ion able to accept a hydrogen ion from an acid.

Answer:

1.Sour in taste

2. Tum blue litmus into red

3. Acids change methyl orange to red

4.Phenolphthalein remains colourless

5. Acids do not give soapy touch

6. Give hydrogen ions in solution

Bitter in taste

Answer:

Electrons

Explanation:

Atoms both have negative and positive particles

Protons are positive

Electrons are negative

Neutrons are neutral

Nuclei is where you find both neutrons and protons in an atom

Answer:

c electrons

Explanation:

The Croatian seismologist, Andrija Mohorovicic, discovered a boundary change in the Earth's layers  because he noticed that P-waves were refracted at the boundary.

Seismologists are described as Earth scientists, specialized in geophysics, who study the genesis and the propagation of seismic waves in geological materials.

Andrija Mohorovicic realized that as one crosses the boundary the predominant mineral composition of the rock changes, and the minerals on the mantle side enable seismic waves to travel faster.

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The equipment you might use to prevent energy being lost during the heating of the ice/water is : calorimeter.

A calorimeter is an object used for the process of measuring the heat of chemical reactions or physical changes and also heat capacity. Differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters and accelerated rate calorimeters are the most common types.

Device used to measure the amount of heat involved in a chemical or physical process is called  calorimeter. For example, when exothermic reaction occurs in a solution in calorimeter, heat produced by the reaction is absorbed by solution, that results in increase in temperature.

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Answer:

Explanation:

i wish i can help

A major purchase refers to a high-cost item or service that is considered a significant investment for an individual or household, such as a car, home, or college education. Major purchases usually involve a large sum of money and require careful planning and consideration before a final decision is made.

Any item that a person or a household buys for their own use or consumption is called a consumer good. Durable and non-durable goods are two types of consumer goods that can be classified. Consumer goods are tangible items that people or households buy for their own use or consumption.

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Your question is incomplete, most probably the complete question is:

The difference between Major purchase and Consumer good​?

Answer:

The rms speed of its molecules becomes. (T) has become four times. Therefore, v_(rms) will become two times,...

The volume in cubic inches 1.5x10^5in3 if A backyard pond has 2.5 M3 of water.

Whereas the basic formula for the area of a rectangular shape is length × width, the basic formula for volume is length × width × height. How you refer to the different dimensions does not change the calculation: you may, for example, use 'depth' instead of 'height'.

Measuring the Volume of a Liquid At its most basic level, volume is simply a measure of space. When measuring the volume of a liquid, sometimes referred to as capacity, the units liters (L) and milliliters (mL) are used. Devices used for this measurement include graduated cylinders, beakers, and Erlenmeyer flasks.

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Answer:

61.9 g C3H8

Explanation:

First write and balance equation

C3H8 + 5O2 -> 3CO2 + 4H2O

Next find the limiting reactant

25.0g propane/ 44.097 g propane = 0.567 mol propane

(75.0gO2)(1mol C3H8)/ (32g)(5mol O2)= 0.468 mol propane

Since O2 is the limiting reactant now we can find the mass of CO2

(75.0g O2)(1 mol O2)( 3 mol CO2)(44.01 g CO2)/(32g O2)(5 mol O2)( 1 mol CO2) =61.9g CO2