what would the potential of a standard hydrogen electrode (s.h.e.) be under the following conditions? [h ]=0.21 mh2=3.2 atm=298 k

Answer:

compound is formed .............

When different elements react, their atoms join with other atoms. A substance that is formed is called a compound.

An element is a variety of atoms that consists of a pure substance as well as a proper amount of proton atoms embedded in their nucleus.

In the field of chemistry, a mixture is a concoction of two or more unrelated chemical constituents. A mixture is a physical combination of two or more components in which their distinct identities are maintained. Solutions, suspensions, and colloids can all be considered to be mixtures.

Compounds are groups of two or more distinct elements that are chemically bonded together. Chemical bonds hold the compound together. A compound cannot be physically separated from another compound, and it cannot be determined whether a compound is present in a combination.

Thus, a compound will be formed by the joining of atoms.

To learn more about elements, refer to the link:

https://brainly.com/question/13516179

#SPJ2

Answer: iodine

Explanation: Its right trust me I took quiz.

The substance that is most likely to break easily into many smaller pieces is iodine.

Metals are found around the left hand side of the periodic table while nonmetals are found around the right hand side of the periodic table.

Metals are strong and not brittle. They do not break easily like the nonmetals do. Since iodine is a nonmetal, it is brittle. It breaks easily into smaller pieces unlike the metals; sodium, calcium and copper.

Learn more: https://brainly.com/question/16243729

Answer:

Anaerobic respiration is the type of respiration through which cells can break down sugars to generate energy when oxygen isnt there

Explanation:

hope this helps!

Anaerobic respiration occurs without oxygen and releases less energy but more quickly than aerobic respiration.

\(#Keeplearning \)

When a 13.9 g sample of solid sodium hydroxide (NaOH) dissolves in 250.0 g of water in a coffee-cup calorimeter initially at 23.0 °C, the final temperature of the solution is approximately 4.0 °C.

To find the final temperature of the solution, we can use the principle of conservation of energy. The heat gained by the water will be equal to the heat lost by the solid sodium hydroxide.

First, let's calculate the heat gained by the water:

Heat gained by water = (mass of water) × (specific heat of water) × (change in temperature)

mass of water = 250.0 g

specific heat of water = 4.18 J/g·K

change in temperature = (final temperature - initial temperature)

Next, let's calculate the heat lost by the sodium hydroxide:

Heat lost by sodium hydroxide = (mass of NaOH) × (enthalpy change per mole)

mass of NaOH = 13.9 g

enthalpy change per mole = -44.4 kJ/mol

Since we are given the mass of NaOH in grams, we need to convert it to moles:

moles of NaOH = (mass of NaOH) / (molar mass of NaOH)

The molar mass of NaOH is 22.99 g/mol + 16.00 g/mol + 1.01 g/mol = 39.00 g/mol

Now we can calculate the heat gained by the water and the heat lost by the sodium hydroxide:

Heat gained by water = (250.0 g) × (4.18 J/g·K) × (final temperature - 23.0 °C)

Heat lost by sodium hydroxide = (13.9 g / 39.00 g/mol) × (-44.4 kJ/mol)

Since the heat gained by the water is equal to the heat lost by the sodium hydroxide, we can set up an equation:

(250.0 g) × (4.18 J/g·K) × (final temperature - 23.0 °C) = (13.9 g / 39.00 g/mol) × (-44.4 kJ/mol)

Simplifying the equation:

(4.18 J/g·K) × (final temperature - 23.0 °C) = (-13.9 g / 39.00 g/mol) × (44.4 kJ/mol)

Now we can solve for the final temperature:

(final temperature - 23.0 °C) = [(-13.9 g / 39.00 g/mol) × (44.4 kJ/mol)] / (4.18 J/g·K)

(final temperature - 23.0 °C) ≈ -19.0 °C

Finally, we can calculate the final temperature of the solution:

final temperature ≈ -19.0 °C + 23.0 °C

final temperature ≈ 4.0 °C

Therefore, the final temperature of the solution is approximately 4.0 °C.

Learn more about conservation of energy from:

https://brainly.com/question/166559

#SPJ11

The more linear the bond, the stronger the attraction this statements about hydrogen bonds is false

Hydrogen bonds refer to the type of non-covalent bond that exists between molecules. It arises when hydrogen atoms with partial positive charges (d⁺) are attracted to electronegative atoms (d⁻) in another molecule. There are three key features of hydrogen bonding: a hydrogen donor, a hydrogen acceptor, and a hydrogen bond. Here are some true statements about hydrogen bonding: It is a type of non-covalent bond. The donor is a hydrogen atom bonded to a less electronegative atom than hydrogen.  The acceptor must contain a non-bonded pair of electrons.

However, the statement that says "the more linear the bond, the stronger the attraction" is false. The strength of the hydrogen bond depends on various factors, including the distance between the donor and acceptor, the angle between the hydrogen donor and acceptor, and the strength of the hydrogen bond.

To know more about Hydrogen bond refer here :

https://brainly.com/question/1426421

#SPJ11

The melting of 1.5 mol of ice releases 9.015 kJ of heat.

Ice melts by absorbing heat, but the temperature doesn't change since the extra heat is expended in releasing the force that holds the ice particles together. Latent heat of fusion is the name given to this energy, which is thought to be concealed within ice.

6.01 kJ/mol is the molar heat of fusion of ice.

Hence, Q = n  Hfus can be used to calculate the amount of heat absorbed by the melting of 1.5 mol of ice.

Q = 1.5 moles times 6.01 kJ/mol

Q = 9.015 kJ

To know more about heat visit:-

https://brainly.com/question/30603212

#SPJ1

Answer:

General equation for a double-displacement reaction:  

AB + CD --> AC + BD

• sodium chloride – NaCl copper sulfate – CuSO₄  

NaCl + CuSO₄ --> Na₂SO₄ + CuCl₂

The products formed are sodium sulfate and copper (II) chloride.

Copper (II) chloride forms a blue colored solution.

• sodium hydroxide – NaOH copper sulfate – CuSO₄  

NaOH + CuSO₄ --> Na₂SO₄ + Cu(OH)₂

The products formed are sodium sulfate and copper (II) hydroxide.

Copper (II) hydroxide forms a blue colored solution.

• sodium phosphate – Na₂HPO₂ copper sulfate – CuSO₄  

Na₂HPO₄ + CuSO₄ --> Na₂SO₄ + CuHPO₄

The products formed are sodium sulfate and copper (II) hydrogen phosphate.

Copper (II) hydrogen phosphate forms a blue colored solution.

• sodium chloride – NaCl silver nitrate – AgNO₃  

NaCl + AgNO₃--> AgCl + NaNO₃

The products formed are silver chloride and sodium nitrate.

Silver chloride forms a white precipitate.

• sodium hydroxide – NaOH silver nitrate – AgNO₃  

NaOH + AgNO₃   --> NaNO₃ + AgOH

The products formed are silver hydroxide and sodium nitrate.

Silver hydroxide forms a white precipitate.

• sodium phosphate – Na₂HPO₄ silver nitrate – AgNO₃

Na₂HPO₄ + AgNO₃  --> NaNO₃ +  Ag₂HPO₄

The products formed are sodium nitrate and silver hydrogen phosphate.

Silver hydrogen phosphate forms a colorless solution.

Explanation:

The two possible products in the precipitation reaction of copper (II) chloride and sodium phosphate are copper(II) phosphate and sodium chloride.

The empirical formula of the copper phosphate =\(Cu_3P_2O_8\)

The empirical formula of the sodium chloride = \(NaCl\)

Explanation:

\(3CuCl_2(aq)+2Na_3PO_4(aq)\rightarrow Cu_3(PO_4)_2(s)+ 6NaCl(aq)\)

Charge on the copper(II) ion = +2

Charge on the phosphate ion = -3

The ratio of a number of copper, phosphorus, and oxygen atoms:

\(Cu:P:O=3:2:8= 3:2:8\)

The empirical formula of the copper phosphate =\(Cu_3P_2O_8\)

Charge on the sodium ion = +1

Charge on the chloride ion = -1

The ratio of a number of sodium and chlorine atoms:

\(Na:Cl=1:1=1:1\)

The empirical formula of the sodium chloride = \(NaCl\)

The two possible products in the precipitation reaction of copper (II) chloride and sodium phosphate are copper(II) phosphate and sodium chloride.

Learn more about empirical formula here:

brainly.com/question/1247523?referrer=searchResults

brainly.com/question/1363167?referrer=searchResults

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

Learn more about mass concentration  here:- brainly.com/question/23437000

#SPJ11

Answer:no

Explanation:

The number of the molecules of the Cl2 are present in the 27.3 moles of Cl2 is 1.64 x 10²⁵ molecules.

The proportionality factor that connects the quantity of material in a sample with the number of component particles in that sample is called the Avogadro constant, often known as NA or L. It has a precise value of 6.022140761023 reciprocal moles and serves as a SI defining constant.

We calculate the number of molecules by using relation of Avogadro number as follows:

No. of molecules = 1 mole of substance = n (Avogadro number) = molecular weight

So, molecular weight = n

Value of n is 6.022 x 10²³

so, 27.3 g of water has 6.022 x 10²³ molecules

27.3 g  ≡  6.022 x 10²³

1 g ≡ 6.022 x 10²³/ 27.3

27.3 g ≡ (6.022 x 10²³/18) x 27.3

 = 1.64 x 10²⁵ molecules

27.3 moles of Cl2 is 1.64 x 10²⁵ molecules.

Learn more about Number of the molecules:

https://brainly.com/question/28225015

#SPJ4

There are 1.647 x 10^25 molecules of Cl2 present in 27.3 moles of Cl2.

To find the number of molecules of Cl2 present in 27.3 moles of Cl2, we need to use Avogadro's number. Avogadro's number tells us the number of particles (atoms or molecules) in one mole of a substance. It is approximately equal to 6.022 x 10^23 particles per mole.

First, we need to convert the moles of Cl2 to the number of particles of Cl2 using Avogadro's number:

27.3 moles Cl2 x (6.022 x 10^23 molecules/mole) = 1.647 x 10^25 molecules of Cl2


To determine the number of molecules in 27.3 moles of Cl₂, you can use Avogadro's number, which is approximately 6.022 x 10²³ molecules per mole.

Number of molecules = (moles of Cl₂) x (Avogadro's number)
Number of molecules = (27.3 moles) x (6.022 x 10²³ molecules/mole)

Number of molecules = 1.64 x 10²⁵ molecules of Cl₂

To learn more about Avogadro's number click here

brainly.com/question/11907018

#SPJ11

Answer:

C. Neither accurate nor precise

Explanation:

Thus the results are neither accurate nor precise.

Answer:

PLEASE MARK ME AS THE BRAINLIEST

Explanation:

According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.

The third quantum number (m_l) of a 3s² electron in phosphorus is 0.

The third quantum number, denoted as m_l, represents the magnetic quantum number and describes the orientation of an orbital within a subshell. It can have integer values ranging from -l to +l, where l is the azimuthal quantum number.

In the electron configuration of phosphorus, we see that the 3s subshell is being filled. The azimuthal quantum number (l) for the 3s subshell is 0. Since the electron is in the 3s² subshell, there are two electrons present in the 3s orbital.

For the two electrons in the 3s orbital, they will have opposite spins due to the Pauli exclusion principle. However, the magnetic quantum number (m_l) for both electrons in the 3s orbital will be the same, which is 0.

Therefore, the third quantum number (m_l) of a 3s² electron in phosphorus is 0. This means that both electrons in the 3s orbital have the same orientation within the subshell.

To learn more about quantum number, here

https://brainly.com/question/31955577

#SPJ4

Answer:

Explanation:

The equilibrium constant expression for the given reaction is:

Keq = [Cl₂][PCI₃] / [PCl₃]

We are given the equilibrium constant (Keq) as 2.24 x 10^-2 at 327°C, as well as the initial concentrations of PCl₃ and PCI₃. We need to determine the equilibrium concentration of Cl₂.

Let's assume that the change in concentration of PCl₃ is -x, the change in concentration of Cl₂ is +x, and the change in concentration of PCI₃ is +x, at equilibrium. Then, the equilibrium concentrations are:

[PCl₃] = 0.235 - x

[Cl₂] = x

[PCI₃] = 0.174 + x

Substituting these expressions into the equilibrium constant expression, we get:

2.24 x 10^-2 = (x)(0.174 + x) / (0.235 - x)

Simplifying and rearranging this equation, we get a quadratic equation:

2.24 x 10^-2 (0.235 - x) = x (0.174 + x)

0.00526 - 2.24 x 10^-2 x = 0.174x + x^2

x^2 + 0.138x - 0.00526 = 0

We can solve this quadratic equation to find the value of x:

x = 0.046 M (rounded to 3 significant digits)

Therefore, the equilibrium concentration of Cl₂ is 0.046 M, which is the same as the change in concentration of Cl₂.

Since the equilibrium concentration of Cl₂ is greater than zero, this means that the products (Cl₂ and PCI₃) are favored at equilibrium.

Water that is salty and chilly sinks to the ocean's bottom.Water is transported around the world by the huge ocean conveyor.Warm water is less thick and stays on the surface of the ocean whereas cold, salty water sinks to the bottom.Warm water is less dense than cold water.

As you just observed, as sea ice forms, salt is driven from the ice crystals, making the water around them saltier.Since the water in this saltier environment is denser, it sinks.The sinking water is replaced by surface water, which finally gets cold and salt enough to sink itself.

2. Sea Ice Aids in Preventing Global Warming.According to Tilling, sea ice separates the ocean from of the atmosphere like a "blanket."Sea ice blocks sunlight while also retaining heat already present in the ocean, preventing it from warming climate air above.

To know more about cold salt water visit:

https://brainly.com/question/1658170

#SPJ4

Answer:

2Al2O3 (l) ---> 4Al (l) + 3O2 (g)

Explanation:

The reaction is the electrolysis of aluminium oxide. It decomposes aluminium oxide (Al2O3) into aluminium metal (Al) and Oxygen (O2). In this process, aluminium oxide is molten (liquid state) so that ions can move to complete the electricity circuit.

Al2O3 (l) ---> Al (l) + O2 (g)

Balance the equation:

2Al2O3 (l) ---> 4Al (l) + 3O2 (g)

Answer:

The acceleration of the object equals the gravitational acceleration. The mass, size, and shape of the object are not a factor in describing the motion of the object. So all objects, regardless of size or shape or weight, free fall with the same acceleration

Answer:

A

Explanation:

it causes the genes of two different individuals to mix

Answer:

Explanation:

A. It causes the genes of two different individuals to mix.

Answer:

well there combined net force is 145N so the rock will go up and they will have 5 N to spare

Explanation:

Elements are the smallest unit of the atom and cannot be divided. An element having 5 electrons, protons, and neutrons is a boron.

Subatomic particles are the constituents of atoms that have mass and charge. They are the components that make the element unique and give the atomic number and the mass.

The electron is a negatively charged particle and protons are positive particles that along with neutral neutron give the atomic mass. An element with 5 sub atomic particles is called a boron.

Therefore, the element is boron.

Learn more about sub atomic particles here:

https://brainly.com/question/23453530

#SPJ2

Explanation:

i found this I hope it helps

Answer:

the periodic table is G.

The periodic table has the elements placed in the locations that match the information on the flash cards is F.

The term "periodic table" refers to an arrangement of all known elements in order of increasing atomic number and recurrent chemical attributes. The periodic table is organized into 118 elements.

The term "periodic table" can also refer to a table that lists all known chemical elements in rows and columns.

In the F table, L is found in alkaline earth metals while M is found in transition metals. M has more valence electrons than L, while L is more reactive than M.

Thus, the  periodic table has the elements placed in the locations that match the information on the flash cards is F.

To learn more about periodic table, refer to the link below:

https://brainly.com/question/11155928

#SPJ5

Answer:

Rocky road ice cream is an example of a __________Homogeneous___________ mixture.

Mass of the carbon is 7.44 g while the mass of the hydrogen is 0.4 g.

We have to know that we can be able to obtain the masses of each of the atoms that can be found in the molecule that is called propane. You have to note that propane is a hydrocarbon and this means that the only two atoms there are carbon and hydrogen.

We then have;

Number of moles of the propane = mass/molar mass = 82.0 g/44 g/mol

= 1.86 moles

Number of moles of the carbon = 1.86 moles/3 = 0.62 moles

Mass of carbon = 0.62 mol * 12 g/mol = 7.44 g

Number of moles of hydrogen = 1.62/8 = 0.2 moles

Mass of the hydrogen = 0.2 moles * 2 g/mol = 0.4 g

Learn more about moles:https://brainly.com/question/26416088

#SPJ1

Answer:

I can i have done this before

Explanation:

hope this helps

may i get braineist

btw im in 5th grade too  i have the same worksheets i can help if your behind. i got an 100% on this

A renewable fuel called ethanol is created from various plant elements known as "biomass."

Thus, Ethanol is used to oxygenate more than 98% of the gasoline sold in the United States. E10 (10% ethanol, 90% gasoline) is typically added to gasoline, which lowers air pollution.

Ethanol is also available in the form of E85 (also known as flex fuel), which can be used in vehicles that can run on any gasoline and ethanol mixture up to an 83% concentration.

Since ethanol has a greater octane rating than gasoline, it offers superior mixing qualities. Engine knocking is prevented and drivability is ensured by minimum octane number regulations for fuel.

Thus, A renewable fuel called ethanol is created from various plant elements known as "biomass."

Learn more about Ethanol, refer to the link:

https://brainly.com/question/25002448

#SPJ1

Answer:

3. They allow us to take energy from natural processes

Explanation:

There are two major sources of energy namely: renewable and non-renewable. Renewable sources of energy are those natural sources that gets replenished faster than they are utilized, which is contrary to non-renewable sources. Examples of renewable sources of energy are wind energy, solar energy, hydro (water) energy.

According to the question, one advantage or merit that renewable sources have over their counterparts is that they allow us to take energy from natural processes e.g. wind, sunlight etc.