A solution has a pH of 3.66. The pOH ofthis solution isa. 3.76b. 10.24c. 3.66d. 10.34e. none of these

a) The graph shows that the substance takes longer to boil than to melt. One reason for this is that boiling requires more energy than melting.

b) The heating curve of pure water shows the changes in temperature as water is heated. When water is initially heated, it absorbs heat energy, causing its temperature to rise until it reaches its boiling point.

a. When a substance melts, its particles absorb energy, causing the bonds between them to weaken and eventually break, causing the substance to transition from a solid to a liquid state. However, during boiling, not only must the particles absorb energy to break their bonds, but they must also overcome the pressure of the surrounding atmosphere, which keeps them in their liquid state. This means that boiling requires more energy than melting, which is why it takes longer for a substance to boil than to melt.

b. As water continues to be heated, it undergoes a phase transition from a liquid to a gas, with its temperature remaining constant during this process. Once all of the water has boiled off, the temperature begins to rise again as the energy is absorbed by the container or the surrounding environment.In a heating curve of pure water, the x-axis represents temperature, while the y-axis represents heat energy. The curve starts at the initial temperature of the water, then rises until it reaches the boiling point. At the boiling point, the curve remains horizontal until all of the water has boiled off. After this, the curve rises again, showing the energy absorbed by the container or environment. The curve will be similar to an inverted U-shape, with a flat portion in the middle.

for more such questions on  boiling point

https://brainly.com/question/40140

#SPJ8

The isotope symbol that fits each description is as follows: 68 neutrons, 47 electrons is Ag b. mass number = 197, 79 electrons is Au c. atomic number = 86, 136 neutrons is Rn d. atomic number = 76, mass number = 192 is Os.

Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element but have distinct nucleon numbers (mass numbers) as a result of having a different number of neutrons in their nuclei. Although the chemical properties of each isotope of a given element are nearly identical, they differ in their atomic weights and physical characteristics.

The name "isotope" refers to the fact that different isotopes of the same element occupy the same location on the periodic table. The word "isotope" is derived from Greek origins that mean "the same place".

to know more about isotope visit

https://brainly.com/question/11680817

#SPJ4

It is important for chemists to study submicroscopic matter because the behavior and properties of matter at the atomic and molecular levels directly influence the macroscopic properties and phenomena observed in the world around us.

Here are some reasons;

Understanding fundamental principles: Submicroscopic matter provides insights into the fundamental principles and laws that govern the behavior of matter. By studying atoms, molecules, and their interactions, chemists can uncover the underlying principles that explain various chemical phenomena.

Predicting and controlling macroscopic properties: The properties of macroscopic matter, such as solubility, reactivity, and physical characteristics, are determined by the arrangement, composition, and interactions of its submicroscopic components. By understanding and manipulating submicroscopic matter, chemists can predict and control macroscopic properties, leading to the development of new materials with specific characteristics or the optimization of existing materials.

Exploring chemical reactions and processes: Chemical reactions occur at the submicroscopic level, involving the rearrangement of atoms and the breaking and forming of chemical bonds. By studying submicroscopic matter, chemists can investigate reaction mechanisms, understand reaction kinetics, and develop strategies to optimize chemical processes for efficiency, selectivity, and sustainability.

Advancing technology and innovation: Many technological advancements and innovations rely on the understanding and manipulation of submicroscopic matter. Fields such as nanotechnology, molecular electronics, and materials science heavily rely on studying and engineering matter at the atomic and molecular scale to develop new technologies, devices, and materials with improved performance and functionality.

To know more about submicroscopic here

https://brainly.com/question/10936703

#SPJ4

According to diffusion, 30.82 seconds is required for equal volume of sulfur dioxide to diffuse  through the same partition​.

Diffusion is defined as the movement of molecules that occurs in the presence of a concentration gradient. It aids in the transport of chemicals into and out of the cell. The molecules travel from a low concentration zone to a high concentration region until the concentrations equalise.

There are two kinds of diffusion:

1) A basic diffusion process in which molecules migrate over a semi-permeable membrane without the assistance of transport proteins.

2) Facilitated diffusion is the passive transport of molecules across the cell membrane from a high concentration area to a low concentration region.

Osmosis and dialysis are two examples of assisted diffusion.

Applying Graham's diffusion rule, 

Applying Graham's diffusion rule, RSo2/RH2S 

= (MH2S/MSO2)1/2 (465/30)/620/t 

= (38/64)1/2 

by solving 

t= 30.82 sec.

Thus, 30.82 seconds is required for equal volume of sulfur dioxide to diffuse  through the same partition​.

Learn more about Diffusion:

brainly.com/question/20843145

#SPJ4

The fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.

Fugacity is a measure of the escaping tendency of a component in a mixture, which is defined as the pressure that the component would have if it obeyed ideal gas laws. It is used as a correction factor in the calculation of equilibrium constants and thermodynamic properties such as chemical potential. Here we need to determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and the change in the chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm. So, using the formula of fugacity: f = P.exp(Δu/RT) Where P is the pressure of the system, R is the gas constant, T is the temperature of the system, Δu is the change in chemical potential of the system.  Δu = RT ln (f / P)The chemical potential at the initial state can be calculated using the ideal gas equation as: PV = nRT    

=>  P

= nRT/V

=> 20.4 atm

= nRT/V

=> n/V

= 20.4/RT The chemical potential of the system at the initial state is:

Δu1 = RT ln (f/P)

= RT ln (f/20.4) Also, we know that for a pure substance,

Δu = Δg. So,

Δg1 = Δu1 The change in pressure is 24 atm – 20.4 atm

= 3.6 atm At the second state, the pressure is 24 atm.

Using the ideal gas equation, n/V = 24/RT The chemical potential of the system at the second state is: Δu2 = RT ln (f/24) = RT ln (f/24) The change in chemical potential is Δu2 – Δu1 The change in chemical potential is

Δu2 – Δu1 = RT ln (f/24) – RT ln (f/20.4)

= RT ln [(f/24)/(f/20.4)]

= RT ln (20.4/24)

= - 0.0911 RT Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is:

f = P.exp(Δu/RT)

=> f

= 20.4 exp (-Δu1/RT)

=> f

= 20.4 exp (-Δg1/RT) And, the change in the chemical potential between this state and a second state of ethane where the temperature is constant but pressure is 24 atm is -0.0911RT. Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.

To know more about chemical potential visit:-

https://brainly.com/question/31100203

#SPJ11

The molar mass corresponds to the chlorofluorocarbon CF3Cl (Freon-11), which has a molar mass of 137.37 g/mol. Therefore, the chlorofluorocarbon in the experiment is CF3Cl.

The rate of effusion of a gas through a porous barrier is inversely proportional to the square root of its molar mass. Therefore, we can use the rate of effusion to determine the relative molar mass of the two gases and identify which one is a chlorofluorocarbon.

The rate of effusion can be calculated using Graham's law:

Rate of effusion = Volume of gas / Time taken to effuse

For the chlorofluorocarbon, the rate of effusion is:

Rate of effusion (CFC) = 50 mL / 157 s = 0.3185 mL/s

For argon, the rate of effusion is:

Rate of effusion (Ar) = 50 mL / 76 s = 0.6579 mL/s

Using Graham's law, we can set up the following equation:

Rate of effusion (CFC) / Rate of effusion (Ar) = sqrt(Molar mass (Ar) / Molar mass (CFC))

Solving for the ratio of molar masses:

Molar mass (Ar) / Molar mass (CFC) = (Rate of effusion (Ar) / Rate of effusion (CFC))^2

Molar mass (Ar) / Molar mass (CFC) = (0.6579 mL/s / 0.3185 mL/s)^2

Molar mass (Ar) / Molar mass (CFC) = 4.294

Molar mass (CFC) = Molar mass (Ar) / 4.294

The molar mass of argon is 39.95 g/mol. Therefore, the molar mass of chlorofluorocarbon is:

Molar mass (CFC) = 39.95 g/mol / 4.294 = 9.30 g/mol

To learn more about molar mass

https://brainly.com/question/13152455

#SPJ4

Answer:

B

Explanation:

The \(\rm \bold{F^1^-}\) is the fluorine anion with 8 valence electrons. Hence, option B is correct.

An ion is defined as the atom with the change in the valence electrons by the loss or gain of electrons to complete the outer shell.

The ions with the gain of electrons result in a negative charge and are termed anions. The ions with a loss of electrons have a positive charge and are termed cations.

The F is the halogen atom of group 17 with 7 valence electrons. The ion formed for F requires 1 electron to complete its valence shell.

The ion \(\rm F^1^-\) has a negative charge, which denotes it gains an electron and forms anion.

The gain of electrons results in the number of valence electrons being 8.

Thus, \(\rm F^1^-\) is the fluorine anion with 8 valence electrons. Hence, option B is correct.

Learn more about ions, here:

https://brainly.com/question/1782326

Answer:

yes because tissues take long to survive the aeedlings

Answer:

Athlete will run \(\[34.272Km\]\)

Explanation:

One mile equals to \(\[1.609Km\]\)  

 \(& \therefore 21.3\text{ mile = 1}\text{.603}\times \text{21}\text{.3}Km \\ & 21.3\text{ mile = 34}\text{.2717}Km \\\)  

Thus, the athlete will run \(\[34.2717Km\]\).

Learn more about unit conversion here:

https://brainly.com/question/19730577

https://brainly.com/question/17187413

Answer:

71.92 kPa

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (kPa)

P2 = final pressure (kPa)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

T1 = 50°C = 50 + 273 = 323K

V1 = 105L

T2 = -25°C = -25 + 273 = 248K

P2 = 105.4 kPa

P1 = ?

V2 = 55.0 L

Using P1V1/T1 = P2V2/T2

P1 × 105/323 = 105.4 × 55/248

105P1/323 = 5797/248

0.325P1 = 23.375

P1 = 23.375 ÷ 0.325

P1 = 71.92 kPa

Answer:

Acidic

Explanation:

pOH = - log (9.8 x 10^-11)

pOH = 10

pOH + pH = 14

pH = 14-10

pH = 4

Anything below pH of 7 is acidic.

The solubility product of Calcium Carbonate is 15mg/l hence is insoluble in water and the water is under-saturated with respect to calcium.

Calcium Carbonate is only slightly soluble in water. The solubility product is 4.4 × 10⁻⁹, indicating that if equal concentrations of calcium and carbonate are formed only 6.8mg/l of calcium carbonate would be soluble. Thus determined by the data, the water saturation with respect to calcium is under-saturated.

Langelier Saturation Index Complex (LSI) is the indicator of the degree of saturation of calcium carbonate in water.  The under-saturated water effect is the result of the Langelier Saturation Index Complex(LSI) that is negative, hence states that there will be corrosion of pipings.

Learn more about Solubility here https://brainly.com/question/23946616

#SPJ4

The reaction will shift towards the products.

The focus will move to the products. This means that the reaction will favor the forward reaction, which means that it will favor the creation of CH4, and that the forward reaction rate will be greater than the reverse reaction rate.

The equilibrium constant expression is a mathematical formula that shows how product concentrations fluctuate with reactant concentrations. If K is greater than one, the products of the reaction are favored. If K is less than one, the reactants in the reaction are favored.

To learn more about reaction visit:https://brainly.com/question/28984750

#SPJ9

Majority carrier concentration in a semiconductor is expressed as n0 = (ni)2/M, or Majority Carrier Electron Concentration = (Intrinsic Carrier Concentration)2/Minority Carrier Concentration.

What is equilibrium carrier concentration?

The equilibrium carrier concentration is the total number of carriers in the conduction and valence band. A constant is the result of minority and majority charge carriers. The equilibrium carrier concentration is defined as the total number of carriers in the conduction and valence bands without any external influence.

Majority carrier concentration in a semiconductor is expressed as n0 = (ni)2/M, or Majority Carrier Electron Concentration = (Intrinsic Carrier Concentration)2/Minority Carrier Concentration. It is defined as the equilibrium carrier concentration, which is equal to the intrinsic carrier concentration plus the number of free carriers added by doping the semiconductor.

To learn more about equilibrium carrier concentration from the given link below,

https://brainly.com/question/24325111

#SPJ4

Answer:polyatomic molecules

Explanation:molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.Characteristics of molecules

The division of a sample of a substance into progressively smaller parts produces no change in either its composition or its chemical properties until parts consisting of single molecules are reached. Further subdivision of the substance leads to still smaller parts that usually differ from the original substance in composition and always differ from it in chemical properties. In this latter stage of fragmentation the chemical bonds that hold the atoms together in the molecule are broken.

Condensation is a process of conversion of the gaseous phase into liquid phase whereas accretion is a process of accumulation of small particles into larger ones over a period of time.

Condensation is the process by which water vapor in the air is changed into liquid water it's generally the opposite of evaporation. Condensation is crucial to the water cycle because it is responsible for the formation of clouds.

Accretion is the accumulation of smaller particles into a massive object by gravitationally pulling more matter towards itself, typically gaseous matter, in an accretion process. Most astronomical objects, such as galaxies, stars, and planets, are formed by the same accretion processes itself.

Accretion from natural causes, that  adds soil, sand, and also other types of earth to the part of a person's property that generally borders water. While this occurs very slowly, a piece of property may grow a lot overtime and also may increase its value.

To know more about condensation and accretion

https://brainly.com/question/28915765

#SPJ4

Answer:

base

Explanation:

carbonic acid - H2CO3 - is a weak acid. Therefore, HCO3 itself is its conjugate base. The Na(sodium) ion is neutral.

This means that NaHCO3 is a base. (a weak one)

Answer

Proteins

Explanation:

edg.2020

Answer:

Explanation:

Heat energy always moves from hot to cold. The sunlight doesn't reach certain parts of the ocean due to it being so deep. The water above it absorbs it. So because this top water absorbs all the heat/energy, it is a lot warmer and is constantly transferring heat to the colder parts through kinetic energy. The warmer water has particles that have way more kinetic energy than the cold particles below it. And more kinetic energy means more movement, so that's why they transfer their heat to the colder particles.

I dont actually know if Im correct or not. Im just guessing based on what I know about physics.

Answer:

Cu

Copper is a chemical element with the symbol Cu and atomic number 29.

...

7.1Element Forms.

Explanation:

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Hope it helps!

Brainliest pls!

Follow me! ;)

(a) We would need 19595.6 J of heat to evaporate 8.66 g of water.

(b) The heat of solution is -3.1 J/mol.

To evaporate 8.66 g of water, we need to use the heat of vaporization for water, which is 2260 J/g.

Therefore, the total amount of heat required to evaporate 8.66 g of water is:

2260 J/g x 8.66 g = 19595.6 J

Therefore,

To find the heat of solution in J/mol, we need to use the formula:

ΔH_solution = -q_solution / n

where;

First, we need to calculate the heat released or absorbed during the solution process, which can be found using the formula:

q_solution = m_solution x C_solution x ΔT

We know that 8 mol of the unknown salt were dissolved in 1.25 g of solution, so the mass of the solute is:

m_solute = n x M

We also know that the temperature of the solution decreased from 25.1 ⁰C to 20.4 ⁰C, so ΔT = 4.7 K.

The specific heat capacity of water is 4.184 J/g·K, so we can assume that the specific heat capacity of the solution is also 4.184 J/g·K.

Therefore, the heat released or absorbed during the solution process is:

q_solution = 1.25 g x 4.184 J/g·K x 4.7 K = 24.8 J

Now we can use this value to calculate the heat of solution:

ΔH_solution = -q_solution / n

= -24.8 J / 8 mol

= -3.1 J/mol

Therefore,  Note that the negative sign indicates that the solution process is exothermic, i.e., heat is released during the process.

Learn more about heat of solution here: https://brainly.com/question/29055794

#SPJ1

Suppose that 9 good fuses and 4 defective ones have been mixed up. The defective fuses, we test them one-by-one, at random. The probability that we are lucky and find both of the defective fuses in the first two tests is 1/13.

We can use the concept of probability. There are 13 fuses in total, and we are looking for a specific order of the first two being defective. For the first test, the probability of selecting a defective fuse is 4/13 (since there are 4 defective fuses and 13 total fuses). Once we have found one defective fuse, there are now 3 defective fuses remaining and a total of 12 fuses. For the second test, the probability of selecting another defective fuse is 3/12, which can be simplified to 1/4.

To find the probability of both events happening consecutively, we multiply the probabilities of each individual event: (4/13) * (1/4) = 4/52, which simplifies to 1/13.  So, the probability of finding both defective fuses in the first two tests when there are 9 good fuses and 4 defective ones is 1/13.

Learn more about probability at

https://brainly.com/question/16995855

#SPJ11

Radiative heat transfer through the glass is reduced by the silvering. The vacuum flask was created in 1892 by James Dewar.

Because of the vacuum between its double walls and the inner bottle's silver coating, heat cannot move through the inner bottle by convection. Conduction cannot transfer heat into or out of the flask due to the thickness of the glass walls.

Using using a vacuum area between the outer and inner vessels and a few heat-insulating supporters to support the inner container, it is possible to completely stop heat loss by this method.

To know more about Radiative heat visit :-

https://brainly.com/question/13258114

#SPJ4

327.8 g of NaCl react with 275.0 g of H₂SO4, and 873.6 g of Na₂SO4 are produced from 12.3 mol of HCl.

First, let's balance the chemical equation:

2NaCl + H₂SO4 → 2HCl + Na₂SO4

a) From the balanced equation, we can see that the molar ratio of NaCl to H₂SO4 is 2:1. We can use this ratio to find the moles of NaCl that react with 275.0 g of H₂SO4:

molar mass of H₂SO4 = 98.08 g/mol

moles of H₂SO4 = 275.0 g / 98.08 g/mol = 2.802 mol

moles of NaCl = 2.802 mol H₂SO4 × 2 mol NaCl / 1 mol H₂SO4 = 5.604 mol NaCl

To find the mass of NaCl, we can use its molar mass:

molar mass of NaCl = 58.44 g/mol

mass of NaCl = 5.604 mol NaCl × 58.44 g/mol = 327.8 g

Therefore, 327.8 g of NaCl react with 275.0 g of H₂SO4.

b) From the balanced equation, we can see that the molar ratio of HCl to Na₂SO4 is 2:1. We can use this ratio to find the moles of Na₂SO4 that are produced from 12.3 mol of HCl:

moles of HCl = 12.3 mol

moles of Na₂SO4 = 12.3 mol HCl × 1 mol Na₂SO4 / 2 mol HCl = 6.15 mol Na₂SO4

To find the mass of Na₂SO4, we can use its molar mass:

molar mass of Na₂SO4 = 142.04 g/mol

mass of Na₂SO4 = 6.15 mol Na₂SO4 × 142.04 g/mol = 873.6 g

Therefore, 873.6 g of Na₂SO4 are produced from 12.3 mol of HCl.

For more details regarding chemical reaction, visit:

https://brainly.com/question/29039149

#SPJ1

Answer:

This all should be correct:

c

a

c

a

Answer:

C, A, B, B

Explanation:

Question 1: C. inner core

Why? Because the inner core is literally the center of the Earth. Meaning it is the hottest part of the Earth.

Question 2: A. crust

Why? The crust is the outer most layer which is the layer we walk on so to speak. The Earth can be broken up into four layers and as said before the crust is the outer part of it. It is actually amounts to less than 1% of Earth's volume.

Question 3: B. basalt

Why? If we were to average the oceanic crust we would get something around six kilometers and this is the thickness. This is mostly made up of basalt.

Question 4: B. outer core

Why? Due to difference in pressure and temperature the outer core tends to release dense matter which sinks while warm (less dense rises). This causes the Coriolis force, resulting from the Earth's rotations.

The notation for noble gas is based on the electron configuration of the nearest noble gas, which can be used to represent the valence electrons of an atom. The notation for noble gas is used to represent the electron configuration of elements.

To write the electron configuration for the titanium atom, we can use the notation for noble gas as follows:1s²2s²2p⁶3s²3p⁶4s²3d²In order to write the electron configuration of an element, we first write the number of electrons in the first energy level, then the second energy level, and so on. We then add the electrons in each sublevel in order of increasing energy. Finally, we add the remaining electrons to the highest energy sublevel. This gives us the electron configuration of the element.In the case of titanium, the electron configuration is as follows:1s²2s²2p⁶3s²3p⁶4s²3d²In conclusion, the electron configuration for the titanium atom can be written using noble gas notation as 1s²2s²2p⁶3s²3p⁶4s²3d².

For more information on titanium atom visit:

brainly.com/question/29793325

#SPJ11