where is the atomic mass on the periodic table

Answer: False

Explanation:

In a true solution, the particles will not eventually settle to the bottom of the solution due to the fact that it is homogenous. Imagine getting a fountain soda at a restaurant and leaving the drink alone. No matter how long you wait, the sugar in the soda isn't going to settle at the bottom of the cup.

False In a true solution, the particles will not eventually settle to the bottom of the solution due to the fact that it is homogenous. Imagine getting a fountain soda at a restaurant.

and leaving the drink alone. No matter how long you wait, the sugar in the soda isn't going to settle at the bottom of the cup. The solute particles in a genuine solution are equally scattered and do not sink to the bottom of the solution. A genuine solution is a homogenous mixture in which the solute particles are so thoroughly dissolved in the solvent that they cannot be seen or separated mechanically. A genuine solution has equally dispersed solute particles throughout it, giving it a homogeneous appearance and content. ettle at the bottom of the cup. The solute particles in a genuine solution are equally scattered and do not sink to the bottom.

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Answer:

- melting

- sublimation

Explanation:

A phase change is a, well, change between phases. Solid to liquid. Gas to solid. Etc. Gases is a phase, but not a change. Reactions is a change, but not a phase change. This leaves us with melting (solid to liquid) and sublimation (solid to gas).

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- Heather

When a powder is dissolved in water, it changes the temperature because the chemical reaction that occurs between the particles of the solute and the solvent when they mix. The heat energy that is released or absorbed when two particles come together is known as enthalpy of solution.

In order to understand the temperature change in detail, we need to look at the two types of enthalpies that are involved when a powder is dissolved in water.

The first type is called the lattice enthalpy which is the energy that is needed to break the bonds between the particles in the solid. The second type is the hydration enthalpy which is the energy that is released when the particles of the solute are surrounded by the solvent particles.

When a powder is dissolved in water, the lattice enthalpy is broken and the particles of the solute are dispersed throughout the solvent. This requires energy, so the temperature of the solution decreases. Then the solvent particles surround the particles of the solute and release energy, so the temperature of the solution increases. The overall temperature change depends on the difference between the lattice enthalpy and the hydration enthalpy.

When a powder is dissolved in water, it changes the temperature because of the chemical reaction that occurs between the particles of the solute and the solvent when they mix. When two particles come together, the heat energy that is released or absorbed is known as enthalpy of solution. There are two types of enthalpies involved when a powder is dissolved in water.

The first type is lattice enthalpy, which is the energy that is needed to break the bonds between the particles in the solid. The second type is hydration enthalpy, which is the energy that is released when the particles of the solute are surrounded by the solvent particles.

When a powder is dissolved in water, the lattice enthalpy is broken, and the particles of the solute are dispersed throughout the solvent. This requires energy, so the temperature of the solution decreases. Then, the solvent particles surround the particles of the solute and release energy, so the temperature of the solution increases. The overall temperature change depends on the difference between the lattice enthalpy and the hydration enthalpy.

If the lattice enthalpy is higher than the hydration enthalpy, the solution will be cold because more energy is required to break the bonds in the solid than is released when the particles are surrounded by solvent particles. Conversely, if the hydration enthalpy is higher than the lattice enthalpy, the solution will be hot because more energy is released when the particles are surrounded by solvent particles than is required to break the bonds in the solid.

When a powder is dissolved in water, the temperature of the solution changes because of the chemical reaction between the particles of the solute and the solvent when they mix. The overall temperature change depends on the difference between the lattice enthalpy and the hydration enthalpy. If the lattice enthalpy is higher than the hydration enthalpy, the solution will be cold, and if the hydration enthalpy is higher than the lattice enthalpy, the solution will be hot.

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Answer:

A

Explanation:

Caus it makes sense

The heat transfer rate to the cold water is 167.51 kW, and the logarithmic mean temperature difference for this heat exchanger is 28°C.

We know that, Q = m × Cp × ΔT

Where

m = mass flow rate

Cp = specific heat capacity

ΔT = Temperature difference

Q = (1.5 kg/s) × 4.25 kJ/kg °C × (80 - 45)°CQ = 172.69 kW

As per the problem, 3% of the heat given off by the hot fluid is lost through the heat exchanger.

Thus, heat loss is 0.03 × 172.69 kW = 5.18 kW

The heat transfer rate to the cold water is given as Q1 = Q - heat loss = 172.69 kW - 5.18 kW= 167.51 kW

To find the logarithmic mean temperature difference for this heat exchanger:

The formula for LMTD is,∆Tlm = (ΔT1 - ΔT2) / ln(ΔT1 / ΔT2)

where

ΔT1 = hot side temperature difference = Th1 - Tc2

ΔT2 = cold side temperature difference = Th2 - Tc1

Tc1 = inlet temperature of cold water = 20°C

Tc2 = outlet temperature of cold water = ?

Th1 = inlet temperature of hot water = 80°C

Th2 = outlet temperature of hot water = 45°C

∆T1 = Th1 - Tc2 = 80°C - Tc2

∆T2 = Th2 - Tc1 = 45°C - 20°C = 25°C

Thus,∆Tlm = (80°C - Tc2 - 45°C) / ln[(80°C - Tc2) / (45°C - 20°C)]

∆Tlm = (35°C - Tc2) / ln(2.67[(80 - Tc2) / 25])

Now, the heat exchanger is a double pipe parallel flow heat exchanger. Thus, both hot and cold fluids have the same value of LMTD.∆Tlm = 35°C - Tc2 / ln(2.67[(80 - Tc2) / 25]) = 35°C - (47.81/ln(2.67[42.79/25]))

∆Tlm = 27.81°C which is approximately equal to 28°C

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The first step is to use the formula M1V1 = M2V2, where M1 is the molarity of the stock solution, V1 is the volume of the stock solution used, M2 is the molarity of the diluted solution, and V2 is the final volume of the diluted solution.

Plugging in the values, we get:
M1(65.5 ml) = (0.675 M)(450 ml)
Solving for M1, we get:
M1 = (0.675 M)(450 ml) / (65.5 ml)
M1 = 4.65 M
Therefore, the molarity of the stock solution is 4.65 M.
To determine the molarity of the HCl stock solution, we can use the dilution formula: M1V1 = M2V2, where M1 is the molarity of the stock solution, V1 is the volume of the stock solution, M2 is the molarity of the dilution, and V2 is the volume of the dilution.
Given: V1 = 65.5 mL, V2 = 450 mL, and M2 = 0.675 M. We need to find M1.
Rearrange the formula: M1 = (M2V2) / V1. Now substitute the given values: M1 = (0.675 M × 450 mL) / 65.5 mL. Solve for M1: M1 ≈ 4.63 M.
Therefore, the molarity of the HCl stock solution is approximately 4.63 M.

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Answer:

Ammonia

Explanation:

I believe that ammonia is the correct answer to this question.

Degenerate orbitals are orbitals that have the same energy level and are equivalent in their spatial distribution. They are often found in atoms with partially filled subshells or in molecules with similar electronic configurations.

Some characteristics of degenerate orbitals include:

Degenerate orbitals have the same energy: This means that electrons in degenerate orbitals have equal energy levels and cannot be distinguished from one another by their energy.

All orbitals belonging to the same atom are degenerate with respect to one another: This means that within an atom, all orbitals with the same energy level are degenerate.

Degenerate orbitals do not necessarily have the same shape and orientation: This means that orbitals with the same energy level can have different shapes and orientations, such as p orbitals in different directions.

Degenerate orbitals may or may not have the same number of electrons: This means that degeneracy is related to energy level rather than electron count.

Overall, the degeneracy of orbitals is an important concept in understanding electronic structure and chemical bonding.

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The solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

To calculate the solubility of oxygen at a specific depth below sea level, temperature, and salinity, we can refer to the oxygen solubility tables. The solubility of oxygen can vary depending on these factors.

1. Begin by identifying the given parameters:
  - Depth: 10m below sea level
  - Temperature: 25 degrees Celsius
  - Salinity: 30 g/L

2. Use the given parameters to locate the corresponding values in the oxygen solubility table.

3. The solubility of oxygen at a depth of 10m below sea level, 25 degrees Celsius, and 30 g/L salinity is typically around 6.59 mg/L.

Therefore, the solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

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The oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

To calculate the oxygen solubility at a specific depth below sea level, temperature, and salinity, we can use the solubility formula.

The solubility of a gas decreases with increasing temperature and salinity, and increases with increasing pressure.

Here's how you can calculate the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity:

1. Determine the pressure at 10m depth below sea level: -

The pressure at sea level is approximately 1 atmosphere (atm).

The pressure increases by approximately 1 atm for every 10 meters of depth.

Therefore, at 10m depth, the pressure is approximately 2 atm.

2. Convert the temperature to Kelvin: -

To convert from Celsius to Kelvin, add 273 to the temperature.

25°C + 273 = 298 K.

3. Use the solubility formula:

The solubility of oxygen in water can be calculated using Henry's law:

S = k * P * C.

S is the solubility of oxygen in moles per liter (mol/L).

k is the Henry's law constant for oxygen in water at a specific temperature and salinity.  

P is the partial pressure of oxygen in atmospheres (atm).

C is the concentration of oxygen in moles per liter (mol/L).

4. Look up the Henry's law constant for oxygen at 25°C and 30 g/L salinity:

The Henry's law constant for oxygen at 25°C and 30 g/L salinity is approximately 769 L*atm/mol.

5. Calculate the solubility:  

S = (769 L*atm/mol) * (2 atm) * (1 mol/L). - S ≈ 1538 mol/L.

Therefore, the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

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Answer:

New volume of chlorine gas (V2) = 179 ml (Approx)

Explanation:

Given:

Volume of chlorine gas (V1) = 193 ml

Temperature of chlorine gas (T1) = 21°C = 21 + 273 = 294 k

New temperature of chlorine gas (T2) = 0°C = 0 + 273 = 273 k

Find:

New volume of chlorine gas (V2) = ?

Computation:

Using charle's law

V1 / T1 = V2 / T2

193 / 294 = V2 / 273

V2 = 179.21

New volume of chlorine gas (V2) = 179 ml (Approx)

Answer:

the answer is A: 7.0 ppm

Explanation:

To calculate the dissolved oxygen concentration in parts per million (ppm), we need to divide the mass of the dissolved oxygen (0.0070 g) by the mass of the water solution (1000 g) and then multiply by 10^6 to convert the result to ppm.

0.0070 g / 1000 g * 10^6 = 7.0 ppm

The dissolved oxygen concentration in parts per million (ppm)  for 0.0070 gram of oxygen in 1000 g of water is 7 ppm. Hence, option A is correct.

Dissolved oxygen (DO) refers to the amount of molecular oxygen (O2) dissolved in water or another liquid. It is an important measure of water quality, as many aquatic organisms depend on dissolved oxygen to survive.

Dissolved oxygen concentration (ppm) = (mass of dissolved oxygen / mass of solution) x 10^6

The mass of the solution is the mass of the water plus the mass of the dissolved oxygen:

mass of solution = 1000. grams of water + 0.0070 gram of oxygen

mass of solution = 1000.0070 grams

Substituting the values in the formula, we get:

Dissolved oxygen concentration (ppm) = (0.0070 / 1000.0070) x 10^6

Dissolved oxygen concentration (ppm) ≈ 6.9997 ppm

Therefore, the dissolved oxygen concentration of this solution in parts per million is approximately 7.0 ppm (option A).

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Answer:

1.053 grams of HCl.

Explanation:

1st) It is necessary to make sure that the equation is balanced:

From the balanced equation we know that 1 mole of Al(OH)3 react with 3 moles of HCl.

2nd) With the stoichiometry of the reaction and the molar mass of Al(OH)3 (78g/mol) and HCl (36.5g/mol) we can calculate the grams of HCl that can react with 0.750g:

So, 1.053 grams of HCl can react with 0.750g of Al(OH)3.

A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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The process associated with cAMP binding to cAMP-dependent protein kinase/PKA includes I. cAMP binds to the regulatory subunits, II. Tetrameric regulatory subunits and catalytic subunits dissociate, and III. Catalytic subunits phosphorylate multiple targets with specific serine and threonine residues. The correct answer is e. I, II, III.

cAMP-dependent protein kinase (PKA) is a crucial enzyme in the cell signaling pathway. The process associated with cAMP binding to PKA involves the following steps:

I. cAMP binds to the regulatory subunits: When the cellular concentration of cAMP increases, it binds to the regulatory subunits of PKA. This is the first step in activating the enzyme.

II. Tetrameric regulatory subunits and catalytic subunits dissociate: Upon cAMP binding, the PKA enzyme undergoes a conformational change that causes the dissociation of the regulatory and catalytic subunits. This results in the activation of the catalytic subunits.

III. Catalytic subunits phosphorylate multiple targets with specific serine and threonine residues: The activated catalytic subunits are now able to phosphorylate various target proteins at specific serine and threonine residues. This is a crucial step in the transmission of signals within cells.

IV. cAMP is membrane bound via phosphoinositol attachment: This statement is incorrect, as cAMP is not membrane-bound via phosphoinositol attachment. cAMP is a soluble molecule that diffuses freely within the cell.

In conclusion, the processes associated with cAMP binding to PKA are the binding of cAMP to regulatory subunits, dissociation of tetrameric regulatory and catalytic subunits, and phosphorylation of multiple targets by catalytic subunits. The correct answer is e. I, II, III.

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A) The number of H₂O molecules in 0.23 moles is equal to 1.5 × 10²³.

B) The single displacement reaction is,

Ca + 2HCl →  CaCl₂ + H₂

C)  The double displacement reaction is,

Na₂SO₄ + 2NH₄Cl → 2NaCl  + (NH₄)₂SO₄

A displacement reaction is one in which a set of atoms in a molecule are replaced by another set of atoms.

When an element leaves its compound or when one element is replaced by another from its own compound, a single displacement reaction can be demonstrated as a type of redox reaction.

In aqueous solutions, double displacement reactions take place where ions precipitate and exchange ions.

Hydrogen gas and calcium chloride are produced in a single displacement reaction between calcium and HCl acid.

Ca + 2HCl →  CaCl₂ + H₂

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Moss is a nonvascular plant, lacking a transport system and reproducing with spores.The correct option is C

Mosses are small, nonvascular plants that do not have true roots, stems, or leaves. Instead, they have thin thread-like structures called rhizoids that anchor the plant to the substrate and absorb water and nutrients from the surrounding environment.

Mosses reproduce using spores, which are small, single-celled structures that are dispersed by wind or water. Mosses do not produce flowers, seeds, or fruits like angiosperms or gymnosperms do. Instead they produce capsules that contain spores which are released into the environment when the capsule opens.

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The type of weather expected according to the symbol is freezing rain. Option D

The weather symbol for freezing rain is a capital S with one or two points.

The points represent the intensity of the freezing rain. One point indicates light freezing rain, while two points indicate moderate freezing rain.

Freezing rain is known as a type of precipitation that occurs when rain falls through a layer of cold air and freezes on contact with the ground or other surfaces.

It can cause dangerous driving conditions, power outages, and other disruptions.

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Answer:

all behaved the same

Explanation:

I can't explain I'm just trying

Answer:43.12 KG = 43,120 grams

Explanation:1 kilogram is equal to 1,000 grams.

Answer:

43120 g

Explanation:

1 kg = 1000 g

43.12 = 1000(43.12) g

1000(43.12) = 43120

The unit is g because we are converting to grams, and the abbreviation for grams is g.

∴ 43.12 kg = 43120 g

Answer: C

Explanation: I just did it

Answer:

Excited State Configuration: 1s^2 2s^2 2p^4 3s^1 are sperated by 13.00 eV.

Climate exchange feedbacks are important inside the know-how of world warming due to the fact comments techniques expand or diminish the impact of each climate forcing, and so play an important element in figuring out the climate sensitivity and future weather nation.

Climate feedback tactics which could both expand or reduce the results of weather forcings. A remarks that increases an preliminary warming is known as a positive feedback. A comments that reduces an preliminary warming is a negative feedback. Clouds.

Forcing denotes an outside have an impact on on a feature of the weather machine. instance: multiplied emission from the solar results in an increase of the temperature. comments denotes the response of the climate system to the forcing which, in return, results in a change in the forcings.

The expanded formation of clouds as a result of temperature growth is an instance of poor feedback. Poor weather remarks is any method where climate remarks decreases the severity of a few preliminary alternate. Some initial alternate reasons a secondary exchange that reduces the impact of the preliminary exchange.

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Answer:

12cm^3

Explanation:

Just multiply each of the given dimension.

= 3.0 × 4.0 × 1.0

= 3 × 4 × 1

= 12

Answer:

12cm cubed

Just multiply 3, 4, and 1

Answer:

Your answer would be
A.) Carbon

Explanation:

Carbon:
Living things want carbon to measure, grow, and reproduce. Carbon could be a finite resource that cycles through the planet in several forms. This makes carbon obtainable to living organisms and remains in balance with different chemical reactions within the atmosphere and in bodies of water like ponds and oceans.

Oxygen:
Cellular respiration describes the part of the organic process once food breaks right down to offer cells energy. Throughout internal respiration, cells use oxygen to interrupt sugar to provide ATP or nucleotides.

Hydrogen:
Hydrogen plays a vital role in energy production within the body. For our bodies to operate, they have to have energy within the type of nucleotide or ATP. Your body gains energy by overwhelming foods wealthy in substances like carbohydrates.


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Answer:

Carbon- is a versatile element, and the basis of all living organisms.

Oxygen- is the most abundant element by mass.

Hydrogen- makes up %60 of the atoms in living organisms

edge, 2023

Explanation:

Answer: Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper. Pure copper forms on the cathode.

Answer:

An element of the infinite and numerable set {...,-3,-2,-1,0,1,2,3,...}.

Explanation:

An element of the infinite and numerable set {...,-3,-2,-1,0,1,2,3,...}.

The value of ΔG at 298 K for a reaction mixture containing 1.9 atm N2, 1.6 atm H2, and 0.65 atm, the answer is (a) -3.86 × 10^3.

NH3 can be calculated using the equation:

ΔG = ΔG° + RT ln(Q)

where ΔG is the standard Gibbs free energy change, ΔG° is the standard Gibbs free energy change at standard conditions, R is the gas constant, T is the temperature in Kelvin, and Q is the reaction quotient.

In this case, we are given ΔG° as -33.3 kJ/mol. To calculate Q, we need to use the partial pressures of the gases in the reaction mixture. The reaction stoichiometry tells us that the ratio of the partial pressures of N2, H2, and NH3 is 1:3:2. Therefore, we can write:

Q = (P(NH3))^2 / (P(N2) * P(H2)^3)

Plugging in the given values of P(N2) = 1.9 atm, P(H2) = 1.6 atm, and P(NH3) = 0.65 atm, we can calculate Q. Then, using the value of R = 8.314 J/(mol·K) and the temperature T = 298 K, we can substitute these values into the equation and solve for ΔG.

The calculated value of ΔG at 298 K for the given reaction mixture is approximately -3.86 × 10^3 J/mol. This value is equivalent to -3.86 kJ/mol. Therefore, the answer is (a) -3.86 × 10^3.

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Answer: yellow ? i’m sorry if i’m not right

Explanation: