Consider an aqueous solution in which you have dissolved 3 moles of potassium carbonate in water. How many moles of ions are in solution?.

Answer:

The formula is Na2C2O4

Explanation:

I hope this helps

The complete sentences are:

Page 3:

The effect of energy in phase transitions of matter is that it is required to break the intermolecular forces that hold the particles of a substance together. When energy is added to a substance, the particles move faster and the intermolecular forces are broken. This can cause the substance to change phase.

The interactive demonstration on the sample of water shows that energy is required to melt ice and boil water. When the ice is heated, the particles start to move faster and the ice melts. The temperature of the water stays constant at 0°C until all of the ice has melted. This is because the energy is being used to break the intermolecular forces in the ice. Once all of the ice has melted, the temperature of the water starts to rise again. When the water is boiled, the particles move so fast that they escape from the liquid state and become a gas. The temperature of the water stays constant at 100°C until all of the water has boiled. This is because the energy is being used to break the intermolecular forces in the water. Once all of the water has boiled, the temperature of the steam starts to rise again.

The complete sentences:

Page 4:

Heating curves show the temperature of a substance as it is heated. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Cooling curves show the temperature of a substance as it is cooled. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Both curves show that the temperature of a substance increases as it is heated and decreases as it is cooled.

A heating curve is more choppy than a cooling curve because there are more phase changes during heating than during cooling.

Find out more on matter here: https://brainly.com/question/3998772

#SPJ1

Takealot excels at providing convenience, extensive product selection, competitive pricing, and a seamless online shopping experience as its value proposition for consumers.

Convenience is a key aspect of Takealot's value proposition. As an online retailer, Takealot offers the convenience of 24/7 shopping from the comfort of one's own home.

Customers can browse a wide range of products, place orders, and have them delivered directly to their doorstep.

Takealot also offers an extensive product selection, spanning various categories such as electronics, fashion, home goods, and more.

This breadth of choices allows consumers to find and compare different products all in one place, saving them time and effort compared to traditional retailers with limited inventory.

Competitive pricing is another area where Takealot excels. By operating online, the company has lower overhead costs compared to brick-and-mortar retailers, enabling them to offer competitive prices and discounts to their customers.

The seamless online shopping experience provided by Takealot includes user-friendly interfaces, secure payment options, and efficient delivery services. This enhances customer satisfaction and convenience.

In contrast, traditional non-online retailers typically have limited operating hours, smaller product selections, and may not offer the same level of convenience and competitive pricing.

They often require customers to physically visit their stores, which can be time-consuming and may not provide the same level of ease and accessibility as online platforms like Takealot.

To know more about "Customer satisfaction " refer here:

https://brainly.com/question/32142022#

#SPJ11

Answer: It is a alkaline substance/base and it is an antacid

Explanation: Neutralisation is the reaction between an acid and a base, in this scenario, it is the stomach acid and the indigestion tablets (base). They react to form salt and water

Answer:

ok i see it

Explanation:

Answer: the planets, gravity, the galaxies

Explanation:

Write anything you want about it .

For example, there are 8 planets and their names

Answer:

electrical energy

When the flashlight is turned on, the chemical energy is first transformed into electrical energy and then into light energy. CHEMICAL bonds. It is released during a chemical reaction (change). by flowing electrons (negatively charged particles).

Answer:

Electrical Energy

Explanation:

When the flashlight is turned on, the chemical energy is first transformed into electrical energy and then into light energy. CHEMICAL bonds. It is released during a chemical reaction (change). by flowing electrons (negatively charged particles).

No, but Group 1 elements can. Group 1 elements (alkali metals such as Li, Na, K...) all have one valence electron that they donate when forming ionic bonds. This will cause them to have a charge of +1.

Answer:

Explanation:

The mass of an atom is dependent on its number of protons and neutrons. Electrons have mass, but are too light in comparison to protons and neutrons to contribute towards the overall mass. Their relative mass is about 1/1840 compared to 1 for protons and neutrons, and therefore are not counted in the mass.

Hope this helped!

The total time taken to cover the 400 meter run is approximately 9.78 seconds, and the top speed of the car is approximately 62.85 m/s.

We can use the equations of motion to solve this problem. Since the car starts from rest and accelerates at a constant rate, we can use the following equation:

\(v = u + at\)

where v is the final velocity, u is the initial velocity (which is 0 m/s), a is the acceleration, and t is the time.

At the end of the acceleration phase, the car will have reached its top speed. Let's call this speed \(v_top\). We can use the following equation to calculate the distance covered during the acceleration phase:

\(s_acc = ut + 1/2 at^2\)

where \(s_acc\) is the distance covered during the acceleration phase. Since the car starts from rest, the initial velocity u is 0 m/s. Substituting the given values, we get:

\(s_acc = 0 + 1/2 (5.65 m/s^2) (4.24 s)^2 = 51.4 meters\)

Therefore, the remaining distance that the car will cover at top speed is:

\(s_top = 400 m - 51.4 m = 348.6 meters\)

We can use the following equation to calculate the time taken to cover this distance at top speed:

\(t_top = s_top / v_top\)

We also know that the total time of the run is 4.24 seconds (the time taken for the acceleration phase). Therefore, the total time taken to cover the 400 meter run is:

\(total time = 4.24 s + t_top\)

To find \(v_top,\)  we can use the following equation:

\(v_top^2 = u^2 + 2as_top\)

where u is the initial velocity (0 m/s), a is the acceleration (which is 5.65 m/\(s^2\) during the acceleration phase, and 0 m/\(s^2\) during the top speed phase), and \(s_top\) is the distance covered during the top speed phase. Substituting the given values, we get:

\(v_top^2 = 2 (5.65 m/s^2) (348.6 m) = 3947.01\)

Taking the square root of both sides, we get:

\(v_top = 62.85 m/s\)

Therefore, the top speed of the car is approximately 62.85 m/s.

Now we can calculate the time taken to cover the remaining distance at top speed:

\(t_top = s_top / v_top = 348.6 m / 62.85 m/s = 5.54 s\)

Therefore, the total time taken to cover the 400 meter run is:

\(total time = 4.24 s + 5.54 s = 9.78 s\)

Therefore, the total time taken to cover the 400 meter run is approximately 9.78 seconds, and the top speed of the car is approximately 62.85 m/s.

Learn more about Speed at

brainly.com/question/28224010

#SPJ1

The things that potatoes and bacteria have in common is that they both reproduce asexually. Thus option 4 is correct.

Reproduction is defined as the biological process that creates new individual organisms from existing ones, also referred to as "offspring"

It can also be defined as the process by which identically minded organisms make new organisms.

There are two types of reproduction.

Thus. the things that potatoes and bacteria have in common is that they both reproduce asexually. Thus option 4 is correct.

To learn more about reproduction, refer to the link below:

https://brainly.com/question/14329745

#SPJ5

Answer:

A double-replacement reaction

Explanation:

you're welcome

Answer:  B) a larger nuclear charge

Explanation:

Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.

Sodium and magnesium lies in the same period and magnesium lies to the right of sodium. They have same number of principle shell.

As moving from left to right in a period, more and more electrons get added up in the same principle shell and the attraction between the last electron and nucleus increases , which results in the larger nuclear charge and thus shrinkage in the size of an atom. Thus, decreasing the atomic radii of the atom on moving towards right of the periodic table.

Molecules behave differently when the concentration is different because there is increase in intermolecular collision occuring between each molecule.

A molecule is defined as the chemical substance that is made up of two or more atoms that are chemically combined together through bond formations.

Examples of molecules include the following:

When there is less concentration of molecules of a substance, there would be less collision between the molecules per unit time.

But when there is increase in the concentration of the molecules of a substance, these molecules tends to collide more often with each other.

Learn more about molecules here:

https://brainly.com/question/26556885

#SPJ1

The reason why there is more carbon-14 in living bones than in once-living ancient bones of the same mass is due to the process of radioactive decay, which causes the amount of carbon-14 to decrease over time.

To provide a long answer to your question, the reason why there is more carbon-14 in living bones compared to once-living ancient bones of the same mass is due to the process of radioactive decay. Carbon-14 is a radioactive isotope that is naturally present in the environment and is constantly produced in the atmosphere. When living organisms breathe or consume food, they take in carbon-14 and incorporate it into their tissues, including bones.

However, once an organism dies, it no longer takes in carbon-14 and the existing carbon-14 in its tissues begin to undergo radioactive decay. This decay process causes the carbon-14 atoms to decay into nitrogen-14 atoms, which means that the amount of carbon-14 in the once-living ancient bones decreases over time.

The rate of radioactive decay of carbon-14 is known, and scientists can use this knowledge to estimate the age of ancient bones based on the amount of carbon-14 remaining in them. Therefore, living bones will have more carbon-14 compared to once-living ancient bones of the same mass because they have not undergone as much radioactive decay.

To know more about carbon visit:-

https://brainly.com/question/13229518

#SPJ11

The engineer expects 47.5 g of solid sulfur to be consumed when the reaction reaches equilibrium. However, as noted in the problem statement, the engineer's belief about the value of K may not be accurate, so the actual amount of sulfur consumed may differ from this calculation.

The law of mass action states that the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants, each raised to the power corresponding to its stoichiometric coefficient in the balanced chemical equation.

The balanced chemical equation for the combustion of solid sulfur to form sulfur dioxide gas is:

S(s) + O₂(g) → SO₂(g)

According to the law of mass action, the equilibrium constant expression for this reaction is:

K = [SO₂]/[S][O₂]

where [SO₂], [S], and [ O₂] are the equilibrium concentrations of sulfur dioxide, solid sulfur, and oxygen gas, respectively.

At the beginning of the reaction, there is no sulfur dioxide present, so [SO₂] = 0. The engineer introduces 4.8 kg of solid sulfur, which corresponds to an initial concentration of [S] = (4.8 kg)/(32.06 g/mol)/(75.0 L) = 0.00199 M.

The initial concentration of oxygen gas can be calculated using the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Solving for n and using the molar mass of oxygen (32.00 g/mol) gives:

n = PV/RT = (10.0 atm)(75.0 L)/(0.0821 L·atm/mol·K)(550. °C + 273.15) = 1.07 mol

which corresponds to an initial concentration of [O₂] = 1.07 mol/75.0 L = 0.0142 M.

Substituting these values into the equilibrium constant expression gives:

3.7 = [SO₂]/[S][O₂] = x/(0.00199 M)(0.0142 M)

where x is the equilibrium concentration of sulfur dioxide in M. Solving for x gives:

x = 3.7(0.00199 M)(0.0142 M) = 9.97 × 10^-6 M

The equilibrium concentration of sulfur is equal to the initial concentration minus the amount consumed, which is proportional to the equilibrium concentration of sulfur dioxide:

[S]eq = [S]0 - x = 0.00199 M - 9.97 × 10^-6 M = 0.00198 M

Finally, the mass of sulfur consumed can be calculated using the molar mass of sulfur (32.06 g/mol) and the equilibrium concentration of sulfur:

mass of sulfur consumed = (0.00198 M)(32.06 g/mol)(75.0 L) = 47.5 g

Therefore, the engineer expects 47.5 g of solid sulfur to be consumed when the reaction reaches equilibrium.

Learn more about equilibrium here:

https://brainly.com/question/30807709

#SPJ1

Answer

Mass of (H30)2CrO = 38 g

Explanation

Given:

Mass of Sn(CrO4)2 = 43.4 g

Mass of (H3O)2HPO4 = 35.2 g

Required: The mass of (H30)2CrO4 that will be produced

Solution:

Calculate the possible mass that could be produced by each reactant, so as to determine the limiting reagent. Use stoichiometry.

For Sn(CrO4)2:

For (H3O)2HPO4

Sn(CrO4)2 will produce less (H30)2CrO4 therefore, Sn(CrO4)2 is the limiting reagent.

The wavelength of the light is approximately 500 nm. The energy of the photon of light is approximately 6.56 x 10-20 J.

Answer: Question 1:The formula relating wavelength, frequency, and the speed of light is given by:c = fλHere,λ = wavelength, f = frequency, c = speed of lightI. n the problem, frequency is given as 5.98 x 1014 s-1. Therefore, using the formula, the wavelength of light can be calculated as follows:λ = c/f= (3 x 108 m/s)/(5.98 x 1014 s-1)≈ 500 nm

Therefore, the wavelength of the light is approximately 500 nm.

Question 2:The formula relating energy and frequency of light is given by:E = hfwhereE = energy of photonh = Planck's constant = 6.626 x 10-34 J s (Joule seconds)f = frequency of lightIn the problem, the frequency of light is given as 9.89 x 1013 Hz. Therefore, using the formula, the energy of the photon of light can be calculated as follows:E = hf= (6.626 x 10-34 J s) x (9.89 x 1013 Hz)≈ 6.56 x 10-20 J

Therefore, the energy of the photon of light is approximately 6.56 x 10-20 J.

To learn more about photon visit;

https://brainly.com/question/32364752

#SPJ11

YESS It is true!!. In general, atoms are most stable, least reactive, when their outermost electron shell is full. Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule.

A calibration curve is used to calculate the limit of detection and the limit of quantitation, as well as the concentration of an unknown material.

The concentration of an unidentified drug can be determined using a calibration curve. Researchers and developers can use these curves to determine where an unidentified substance plots by comparing them to data points of known drugs at various doses.

A calibration curve is used to calculate the limit of detection and the limit of quantitation, as well as the concentration of an unknown material. The instrument response to a series of standard samples at various concentrations is used to produce the curve.

To learn more about callibration curve refer to:

https://brainly.com/question/13492847

#SPJ4

The same amount of time, the cobalt-60 sample will have a higher activity than the strontium-90 sample because more of its atoms will have decayed. However, over time, the activity of both samples will decrease as more and more atoms decay.

The activities (number of decays per second) of the samples will not be the same. This is because the half-life of strontium-90 is longer than that of cobalt-60, which means that it takes longer for half of the atoms in the strontium-90 sample to decay. Therefore, after the same amount of time, the cobalt-60 sample will have a higher activity than the strontium-90 sample because more of its atoms will have decayed. However, over time, the activity of both samples will decrease as more and more atoms decay.

To learn more about strontium-90
https://brainly.com/question/32059905
#SPJ11

A strong electrolyte is one that is fully ionized in a solution and readily conducts electric current. Here are some ways to identify a strong electrolyte:Solubility:

A substance that fully dissolves in water is more likely to be a strong electrolyte than one that does not fully dissolve in water, which is more likely to be a weak electrolyte or a nonelectrolyte.Conductivity: A strong electrolyte is a compound that readily conducts an electric current when it is dissolved in water, indicating that it has a high number of ions in solution.

Dissociation: When a strong electrolyte is dissolved in water, it breaks apart (or dissociates) completely into its ions, which increases the number of ions in the solution and the conductivity. When dissolved in water, a weak electrolyte only partially dissociates, resulting in a lower concentration of ions and a lower conductivity. For example, HCl is a strong electrolyte and only one of the products H⁺(aq) and Cl⁻(aq) will be seen when the solution is analyzed.

The degree of ionization: A strong electrolyte is one that is fully ionized in water, whereas a weak electrolyte is only partially ionized. The percentage ionization or degree of dissociation of an electrolyte can be calculated using the equilibrium constant expression for the reaction and the concentrations of the components in solution.

To know more about electrolyte visit:

https://brainly.com/question/29058233

#SPJ11

Thus, the rate of disappearance of O₂ is 0.37 mol L⁻¹ s⁻¹ , the rate of appearance of CO₂ is 0.2467 mol L⁻¹ s⁻¹

The rate at which a chemical reaction moves forward is known as the reaction rate in chemistry. It is frequently defined in terms of either the concentration of a reactant that is consumed in a unit of time or the concentration of a product that is generated in a unit of time (amount per unit volume).

The equation becomes:

C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(g)

Rate of reaction = \(-\frac{d[C_2H_4]}{dt}\) = \(-\frac{1}{3} \frac{d[O_2]}{dt}\) = \(+\frac{1}{2} \frac{d[CO_2]}{dt}\) = \(+\frac{1}{2} \frac{d[H_2O]}{dt}\)

It is given that, the rate of disappearance of O₂ is 0.37 mol L⁻¹ s⁻¹.

So, \(-\frac{1}{3} \frac{d[O_2]}{dt} =\) \(+\frac{1}{2} \frac{d[CO_2]}{dt}\)

or,  \(-\frac{1}{3} \frac{d[O_2]}{dt}\)  × (-0.37 mol L⁻¹ s⁻¹) = \(\frac{d[CO_2]}{dt}\)

or, \(\frac{2}{3} \frac{d[O_2]}{dt}\)  × (0.37 mol L⁻¹ s⁻¹) = \(\frac{d[CO_2]}{dt}\)

or, 0.2467 mol L⁻¹ s⁻¹ = \(\frac{d[CO_2]}{dt}\)

Thus, the rate of disappearance of O₂ is 0.37 mol L⁻¹ s⁻¹ , the rate of appearance of CO₂ is 0.2467 mol L⁻¹ s⁻¹

To know more about rate of reaction refer to:

https://brainly.com/question/24795637

#SPJ1

The dipole moment of the hydrogen bromide HBr molecule is equal to 6.77 D. Therefore, option (C) is correct.

A dipole moment can be determined from the product of the magnitude of the charge and the distance between charges and is represented by the Greek letter ‘µ’.

The bond dipole moment arises between two atoms of different electronegativities in a chemical bond.

μ = q × d

Where: μ is the bond dipole moment, q is the magnitude of the partial charges, and d is the distance between them.

Given, the bond Length of HBr = 1.41 A° = 1.41 × 10⁻¹⁰ m.

The charge on H and Br atoms =  1.6 × 10 ⁻⁹ C

Therefore,

Dipole Moment of HBr =  Distance × Charge

Dipole Moment =  1.41 × 10⁻¹⁰ ×  1.6 × 10 ⁻¹⁹

Dipole Moment = 2.25882 × 10⁻²⁹ C.m  

The conversion factor of one-coulomb meter is equal to 2.9989  ×10⁻²⁹ Debye

Therefore,

Dipole Moment = 2.25882  ×10⁻²⁹ × 2.9989  ×10²⁹

Dipole Moment of the HBr = 6.77 Debye.

Learn more about Dipole moment, here:

https://brainly.com/question/16260427

#SPJ1

The concentration of the hydroxide ion [OH¯] in the solution having a pOH of 3.45 is 3.55×10¯⁴ M

The pOH of a solution simply defines the concentration of the hydroxide ion [OH¯] in the solution. It can be expressed mathematically as

pOH = –Log [OH¯]

From the question given above, the following data were obtained:

pOH = –Log [OH¯]

3.45 = –Log [OH¯]

Multiply through by –1

–3.45 = Log [OH¯]

Take the anti-log of –3.45

[OH¯] = anti-log of (–3.45)

[OH¯] = 3.55×10¯⁴ M

Learn more about pH:

https://brainly.com/question/3709867

The volume of water in the container is 292.2 mL.

The molecules in water must be able to move more quickly in order for the temperature to rise, and in order to do this, the hydrogen bonds that bind them must be severed. These intermolecular interactions must be broken by the heat that water absorbs. Before the temperature of the water can rise.

We can used the formula:

Q = m * c * ΔT

Q = amount of heat absorbed by the water

m = mass of water

c = specific heat capacity of water

ΔT = change in temperature of the water

Given;

Q = 64.4 kJ

ΔT = (73.4 - 22.0) °C = 51.4 °C

c = 4.18 J/(g·°C)

Converting the units of Q to Joules:

Q = 64.4 kJ * 1000 J/kJ = 64400 J

Now:

m = Q / (c * ΔT)

m = 64400 J / (4.18 J/(g·°C) * 51.4 °C)

m = 292.2 g

The density of water:

Density = mass / volume

volume = mass / density

volume = 292.2 g / 1 g/mL = 292.2 mL

To know more about the volume visit:

https://brainly.com/question/28428181

#SPJ9