write the cell notation for an electrochemical cell consisting of an anode where al(s) is oxidized to al3 (aq) and a cathode where fe3 (aq) is reduced to fe2 (aq) at a platinum electrode. assume all aqueous solutions have a concentration of 1 mol/l and gases have a pressure of 1 bar. subscriptsuperscript help
Answers
The electrochemical cell consisting of an anode where Al(s) is oxidized to Al3+(aq) and a cathode where Fe3+(aq) is reduced to Fe2+(aq) at a platinum electrode can be represented by the following cell notation: Al(s) | Al3+(aq) || Fe3+(aq) | Fe2+(aq) | Pt(s)
Explanation: The cell notation for an electrochemical cell typically includes the symbols of the reactants and products involved in the redox reaction, along with their corresponding phases and charges, separated by vertical lines. The anode is placed on the left side of the vertical lines, and the cathode is placed on the right side. A double vertical line represents the salt bridge, or the porous membrane that separates the two half-cells and allows the migration of ions without mixing the solutions.
In the given question, the half-reactions can be written as follows:
Anode: Al(s) → Al³⁺(aq) + 3e⁻Cathode: Fe³⁺(aq) + e⁻ → Fe²⁺(aq)By convention, the more negative electrode is placed on the left side, and the more positive electrode is placed on the right side. In this case, Al(s) is more negative than Fe2+ (aq), so it should be placed on the left side, and Fe3+ (aq) should be placed on the right side. The Pt(s) indicates that platinum is used as an inert electrode.
Therefore, the cell notation can be written as: Al(s) | Al³⁺(aq) || Fe³⁺(aq) | Fe²⁺(aq) | Pt(s)Note that the vertical line in the middle represents the salt bridge, which could be represented by two vertical lines (||) or by a single horizontal line with two vertical lines at its ends (↔).
To know more about Anode refer to:
https://brainly.com/question/17109743
#SPJ11
Related Questions
Organic molecules that are universally used as an immediate source of energy are the:_________
Answers
When ATP is broken down, it releases energy in the form of a phosphate bond, which can be used to power metabolic processes.
What is metabolic ?Metabolism is the set of life-sustaining chemical reactions that occur in living organisms. These biochemical processes allow organisms to grow and reproduce, maintain their structures, and respond to their environment. Metabolism of energy within cells is known as cellular metabolism. Metabolism can be divided into two categories, catabolism and anabolism. Catabolism is the breakdown of molecules to obtain energy. Anabolism is the building up of molecules to create other molecules and store energy. Metabolic reactions involve the energy that is used to power the cell and the molecules that are used as building blocks for biosynthesis.
To learn more about metabolic
https://brainly.com/question/1490181
#SPJ1
What do these two changes have in common?
filtering air to remove dust and pollen
picking up a paper clip with a magnet
Answers
Answer:
both of them are physical changes! I hope this is the answer you are looking for. have a blessed day!<3
cr2o72- which element is reduced in the reaction represented above, and how does its oxidation number change?
Answers
The oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.
In the reaction represented by the Cr₂O₇²⁻ ion, the element chromium (Cr) is reduced. Its oxidation number changes from +6 to +3.
In the Cr₂O₇²⁻ ion, each oxygen (O) atom has an oxidation number of -2. The overall charge of the ion is 2-, which means the total oxidation numbers of all the atoms should add up to -2. Since there are seven oxygen atoms, their total oxidation number is (-2) × 7 = -14.
To determine the oxidation number of chromium (Cr), we can set up the following equation;
2(Cr) + 7(-2) = -2
Simplifying the equation, we have;
2Cr - 14 = -2
By solving for Cr, we get;
2Cr = 12
Cr = 6
Initially, the oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.
To know more about oxidation number here
https://brainly.com/question/29263066
#SPJ4
POINTS POINTSSSS :)))
Hopefully they don’t delete it but answer for free if you need some :)
Answers
thank youuuuu :)
thank means a great honour of joy and peace have a good day
If you want to lower water's freezing point 18 degrees C by adding NaCl, what must the molality of the salt solution be? (K(f) for water ris 1.86 degree C/m)
Answers
Answer:
4.84 m
Explanation:
To solve this problem we need Frezing point depression.
Formula is: ΔT = Kf . m . i
ΔT = 18°C
This is data. ΔT is the difference, Freezing T° of pure solute - Freezing T° of solution.
Kf = 1.86 °C/m
m = molality. Our unknown.
i = Ions dissolved in solution, also called Van't Hoff factor.
NaCl → Na⁻ + Cl⁻
Sodium chloride can produce 2 moles of ions.
We replace data: 18°C = 1.86 °C/m . m . 2
18°C / (1.86 °C/m) . 2 = m
molality = 4.84
The introduction of DDT (dichlorodiphenyltrichloroethane) and other ____________ pesticides into agriculture after World war II changed pest control and food production
Answers
The introduction of DDT (dichlorodiphenyltrichloroethane) and other synthetic pesticides into agriculture after World War II changed pest control and food production. What are pesticides? Pesticides are chemicals that are used to kill pests. Pests are defined as any organism that interferes with human activity, like insects that damage crops or rodents that spread disease. Synthetic pesticides were created after World War II.
They include DDT (dichlorodiphenyltrichloroethane) and other synthetic pesticides. What was the impact of the introduction of synthetic pesticides? The introduction of synthetic pesticides like DDT had a major impact on pest control and food production. These pesticides allowed for increased crop yields and better control over insect and rodent populations.
However, they also had negative effects on the environment and human health. Pesticides can contaminate soil and water, harm beneficial organisms, and lead to the development of pesticide-resistant pests. They can also cause health problems for humans, including cancer, reproductive issues, and neurological damage.
The use of synthetic pesticides continues to be a controversial issue, with advocates for both sides of the argument. Some argue that they are necessary for efficient food production, while others argue that they are too harmful to be used safely.
Learn more about dichlorodiphenyltrichloroethane at https://brainly.com/question/14614250
#SPJ11
Which feature of a balanced chemical equation demonstrates the law of
conservation of mass?
A. It shows the products of a chemical reaction to the right of the
reaction arrow.
OB. It has coefficients to show how much of each substance a
chemical reaction uses.
OC. It shows the reactants of a chemical reaction to the left of the
reaction arrow.
D. It has the same types of atoms on both sides of the reaction
arrow.
Answers
Answer:
Option D
Explanation:
it has the same types of atoms on both sides of the reaction
\({\large{\red{\mapsto{\maltese{\underline{\green{\boxed{\blue{\underbrace{\overbrace{\pink{\pmb{\bf{Answer:}}}}}}}}}}}}}}\)
D) It has the same types of atoms on both sides of the reaction arrow.
Explanation:
This law was made by the Antoine Lavoisier in 1789. He want to confirm that the mass of reactant is equal to the mass of product and he was successful to carry out the test.
The speed of a wave is how far the wave travels in one unit of ___.
Answers
Answer:
The speed of a wave is how far the wave travels in one unit of time. (eg: seconds)
Explanation:
For instance, if the crest of a wave travels 30 meters in 2 seconds, the speed of that wave is 15 m/s.
Burger Heaven, Inc. (BHI) conducts a chain-style business operation type of franchise. This involves the transfer to Clive, one of its franchisees, of
Answers
This involves the transfer to Clive, one of its franchisees, of the right to use BHI's trademark, business model, and other proprietary information to operate a Burger Heaven restaurant.
Burger Heaven, Inc. (BHI) conducts a chain-style business operation type of franchise. Clive agrees to follow BHI's standards and procedures in running the restaurant, including using BHI's approved ingredients and recipes, maintaining a certain level of cleanliness and customer service, and paying fees and royalties to BHI.
In exchange, Clive benefits from the brand recognition and support of BHI's marketing and training programs, as well as the opportunity to profit from the popularity of the Burger Heaven concept. This type of franchise allows for consistency across multiple locations and provides a proven business model for aspiring entrepreneurs.
More on chain-style business: https://brainly.com/question/32241837
#SPJ11
What chlorine concentration should be produced when disinfecting a well or well pump?
a.) 25 mg/L
b.) 50 mg/L
c.) 75 mg/L
d.) 100 mg/L
Answers
The recommended chlorine concentration for disinfecting a well or well pump is 50 mg/L.
When disinfecting a well or well pump, a chlorine concentration of 50 mg/L (option b) is typically recommended to ensure effective disinfection and removal of contaminants.
A highly reactive material is chlorine. There is no disinfection at this point when it is introduced to a well; instead, it initially interacts with inorganic substances (hydrogen sulphide, ferrous iron, and manganese). Afterwards, the leftover chlorine reacts with organic matter (algae, phenols, and slime growth) as a result of the reduction of these chemicals. While some unpleasant flavours and aromas might be eradicated, there is only a weak disinfectant activity, and trihalomethanes (carcinogenic, chlorinated organics) might be created.
To know more about chlorine concentration click here:
https://brainly.com/question/10505077
#SPJ11
the chemical symbol of the element whose nucleus has a charge of +9 is
Answers
The chemical symbol of the element with a nucleus charge of +9 is F
The charge of the nucleus is determined by the number of protons it contains, as protons are positively charged particles.
The atomic number of an element refers to the number of protons in its nucleus, and it is represented by a whole number on the periodic table.
Therefore, the chemical symbol of the element whose nucleus has a charge of +9 is based on its atomic number, which is 9. The chemical symbol for this element is "F" for fluorine.
To know more about chemical symbol click on below link :
https://brainly.com/question/9249660#
#SPJ11
who developed the idea of the atomic nature of matter
Answers
The idea of the atomic nature of matter was first developed by John Dalton.
He introduced the atomic theory, which proposed that matter was made up of tiny, indivisible particles called atoms. This theory was based on his observations and experiments on the behavior of gases
.Dalton's atomic theory had several postulates that helped explain the properties of matter. These postulates were:
All matter is made up of atoms, which are tiny, indivisible particles
.Each element is composed of atoms that are identical in size, shape, and chemical properties.
Atoms of different elements have different sizes, shapes, and chemical properties.
Atoms combine in fixed ratios to form compounds, and the ratios of their masses are related by whole numbers.
Atoms are indestructible and cannot be created or destroyed in chemical reactions
.However, Dalton's atomic theory was later modified and expanded upon by other scientists, including J.J. Thomson, Ernest Rutherford, and Niels Bohr, as new discoveries about the structure and behavior of atoms were made.
To know more about Dalton's atomic theory, visit:
https://brainly.com/question/1403872
#SPJ11
n element has four naturally occurring isotopes with the masses and natural abundances given here. isotopemass (amu) abundance (%) 189.9047052.93 290.9056511.54 391.9050417.65 493.9063217.88 find the atomic mass of the element. express your answer to four significant figures and include the appropriate units.
Answers
The atomic mass of the element is 291.0646 amu, rounded to four significant figures: 291.1 amu.
The atomic mass of an element is the weighted average of the masses of its isotopes, where the weight is the fractional abundance of each isotope. To calculate the atomic mass, we need to multiply each isotope mass by its fractional abundance and then add up these products.
The fractional abundances need to be expressed as decimals, so we divide each percentage abundance by 100
52.93% ÷ 100 = 0.5293
11.54% ÷ 100 = 0.1154
17.65% ÷ 100 = 0.1765
17.88% ÷ 100 = 0.1788
Next, we multiply each isotope mass by its fractional abundance:
189.9047052.93 x 0.5293 = 100.3625 amu
290.9056511.54 x 0.1154 = 33.7147 amu
391.9050417.65 x 0.1765 = 69.1759 amu
493.9063217.88 x 0.1788 = 87.9715 amu
Finally, we add up these products to get the atomic mass of the element:
100.3625 + 33.7147 + 69.1759 + 87.9715 = 291.0646 amu
To learn more about Atomic mass :
https://brainly.com/question/17620268
#SPJ4
1. The valence electrons of representative elements are
a) located in the outermost energy level.
b) located closest to the nucleus.
c) anywhere in the atom
d) located in the outermost occupied shell.
Answers
Answer:
a) located in the outermost energy level.
Explanation:
A valence electron is an electron in the outer shell associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Hope this helped!
what is the solute when stirring salt in water until the salt disappears?
Answers
Answer:
The solute is the substance being dissolved.
The solvent is the substance dissolving the solute.
Therefore, the salt is the solute and the water is the solvent.
Explanation:
The salt is the solute.
The true value was 0.120. What was your percent error?
Answers
The question is incomplete as the measured value isn't given. However, an hypothesized measured value will be used to explain how to calculate the percentage error.
Answer:
2.5%
Explanation:
Percentage error :
[(measured value - True value)/ True value] * 100%
The measured value is the value obtained during an while using a measuring device.
If the measured value is = 0.123
Then, the percent error will be :
[(0.123 - 0.120) / 0.120] * 100%
(0.003 / 0.120) * 100%
0.025 * 100%
= 2.5%
The percent error is 2.5%. When the true value was 0.120.
Percent error is a measurement used to quantify the discrepancy between an estimated or experimental value and a known or accepted value.
Given information:
The measured value is 0.123
The true value is 0.120
Calculate the percent error using the formula given as below:
Percent Error = (|True Value - Measured Value| / True Value) * 100%
Substituting the given values in the above equation:
Percent Error = (|0.120 - 0.123| / 0.120) × 100%
= (0.003 / 0.120) × 100%
= 0.025 × 100%
= 2.5%
Therefore, the percent error is 2.5%.
To learn more about the percent error, follow the link:
https://brainly.com/question/3105259
#SPJ6
Your question is incomplete, the complete question was:
The true value was 0.120 and the measured value is 0.123. What was your percent error?
Identify the period, group, and valence electrons block of each element.
Problem:
[Ne] 3s² 3p5
P-5, G-17, p
P-6, G-6, d
P-7, no group, f
P-3, G-17, p
P-3, G-14, p
![Identify the period, group, and valence electrons block of each element. Problem:[Ne] 3s 3p5P-5, G-17,](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/JHm6xgdJy7ki171t2AXUBNdnVS7ws8P0.png)
Answers
The period, group, and valence electrons block of the given element with the electronic configuration [Ne] 3s² 3p5 is Period 3, Group 7, p-block.
What are the periods and groups in the Periodic Table?The periods in the periodic table are the horizontal rows found in the periodic table.
There are 7 periods in the Periodic Table.
Elements in the same period have the same number of electron shells.
The groups in the periodic table are the vertical columns found in the periodic table.
There are 18 periods in the Periodic Table.
Elements in the same group have the same number of valence electrons.
The electronic configuration of atoms can be used to identify the group and period each element belongs to.
Learn more about Periodic Table at: https://brainly.com/question/1173237
#SPJ1
What unit is used for atomic mass
Answers
Answer is daltons
Atomic weight is measured in atomic mass units (amu), also called daltons.
Atomic Mass
Masses of individual atoms are very, very small. Using a modern device called a mass spectrometer, it is possible to measure such minuscule masses. An atom of oxygen-16, for example, has a mass of 2.66 × 10 -23 g. While comparisons of masses measured in grams would have some usefulness, it is far more practical to have a system that will allow us to more easily compare relative atomic masses. Scientists decided on using the carbon-12 nuclide as the reference standard by which all other masses would be compared. By definition, one atom of carbon-12 is assigned a mass of 12 atomic mass units (amu). An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12. The mass of any isotope of any element is expressed in relation to the carbon-12 standard. For example, one atom of helium-4 has a mass of 4.0026 amu. An atom of sulfur-32 has a mass of 31.972 amu.
https://courses.lumenlearning.com/cheminter/chapter/atomic-mass-unit/
Which of the following would not be considered matter?
clouds
trees
rain
air
light
Answers
Answer:
light
Explanation:
Have a nice day
Answer:
light
Explanation:
(02.02 LC)
Which of the following is an example of chemical weathering?
Frost wedging
O Animal activity
Plant growth
O Acid rain
Answers
Answer: acid rain
Explanation: Acid rain is one way in which rocks can be chemically weathered. It can harm forests and crops, damage bodies of water, and contribute to the damage of statues and buildings. In this activity you will simulate the chemical weathering of limestone, which is a soft, sedimentary rock that reacts easily to acid rain.
:quilibrium:
1. Define equilibrium when the equation
Use the equation below to answer the following equilibrium questions:
H₂O (g) + CO (g) =H₂(g) + CO₂(g) + 42 KJ
2. In the reaction above, what could happen that causes the equilibrium to shift to the right?
3. In the reaction above, what could happen to cause the equilibrium to shift to the left?
4. If pressure was increased, what direction would equilibrium shift?
5. If heat was added, what direction would equilibrium shift. What would happen to the concen
6.
If CO was added, what direction would equilibrium shift. What would happen to the concent
chiometry:
the following equation to answer the questions that follow:
Answers
Equilibrium is a state in a chemical reaction where the rate of the forward reaction is equal to the rate of the reverse reaction, resulting in no net change in the concentrations of reactants and products. It is represented by a double arrow (⇌) in chemical equations. In the given equation: H₂O (g) + CO (g) ⇌ H₂(g) + CO₂(g) + 42 KJ
To shift the equilibrium to the right, one or more of the following could occur:
Increasing the concentration of H₂ or CO₂
Decreasing the concentration of H₂O or CO
Increasing the pressure
Removing some of the products (H₂ and CO₂)
Decreasing the temperature
To shift the equilibrium to the left, one or more of the following could occur:
Decreasing the concentration of H₂ or CO₂
Decreasing the pressure
Increasing the temperature
If pressure is increased, the equilibrium will shift in the direction that produces fewer moles of gas. In this case, since there are fewer moles of gas on the right side of the equation (H₂ and CO₂), the equilibrium will shift to the right. If heat is added, the equilibrium will shift in the endothermic direction to absorb the additional heat. In this case, the forward reaction is endothermic (42 KJ on the right side), so the equilibrium will shift to the right to consume the added heat.
If CO is added, the equilibrium will shift to the right to consume the additional CO.The concentration of H₂O and CO₂ will increase, while the concentrations of H₂ and CO will decrease until a new equilibrium is reached.
for such more questions on reaction
https://brainly.com/question/11231920
#SPJ8
What happens if atoms lose energy during a change of state? The atoms are pushed apart by repulsive forces and become less organized. The atoms are pulled together by attractive forces and become less organized. The atoms are pushed apart by repulsive forces and become more organized. The atoms are pulled together by attractive forces and become more organized.
Answers
Answer:
The atoms are pulled together by attractive forces and become more organized.
Explanation:
According to the gas laws, the temperature is the measure of the average kinetic energy of the atoms of a molecule. State of change is primary driven by energy gain or loss. When molecules absorb energy, they transit into a phase in which their atoms are more mobile and move about more freely, staying relatively from, one from the other. When there is loss of energy, the molecules change into a less mobile state in which their atoms move with lesser energy, and stay relatively closer to each other than they were.
During a the process in which atoms lose energy, its atoms are pulled together by the attractive force, and become more organised, since they now possess less kinetic energy.
Answer:
The answer is D: The atoms are pulled together by attractive forces and become more organized.
Explanation: I just took the test and I got the answer write.
I hope this is right for you guys too!
An experiment requires a solution of 60 % ethanol by volume. What volume of alcohol should be added to make a 200 mL of this solution?
Answers
Answer: 120 mL of ethanol must be added.
Explanation:
We are given:
60% ethanol by volume
This means that 60 mL of ethanol is present in 100 mL of solution
Given volume of solution = 200 mL
Applying unitary method:
If 100 mL of solution contains 60 mL of ethanol
So, 200 mL of solution will contain = \(\frac{60}{100}\times 200=120mL\) of ethanol
Hence, 120 mL of ethanol must be added.
What is the approximate pH of an acetate buffer with equimolar concentrations of acetic acid and sodium acetate? A. 9. B. 7. C. 5. D. 1. 5.
Answers
The approximate pH of an acetate buffer with equimolar concentrations of acetic acid and sodium acetate is 5.
Let's understand this in detail:
What is a buffer solution?
A buffer solution is an aqueous solution that has the ability to maintain a constant pH level. The buffer's most significant property is the ability to resist changes in pH when small quantities of acids or bases are added.
The buffer solution comprises a weak acid and its conjugate base and a weak base and its conjugate acid.
The Henderson-Hasselbalch equation is used to calculate the pH of a buffer:
Henderson-Hasselbalch equation
pH = pKa + log [A-]/[HA]Where pKa is the acid dissociation constant,
[A-] is the concentration of the conjugate base, and [HA] is the weak acid concentration.
The pKa value for acetic acid is 4.76. Since the concentrations of acetic acid and sodium acetate are equimolar, their concentrations are identical. Therefore, the concentration of the conjugate base is the same as the concentration of the weak acid.
Using the Henderson-Hasselbalch equation,
pH = 4.76 + log [A-]/[HA]pH = 4.76 + log 1pH = 4.76 + 0pH = 4.76
Therefore, the approximate pH of an acetate buffer with equimolar concentrations of acetic acid and sodium acetate is 5.
#SPJ11
Learn more about buffers: Describe the possible components of a buffer solution. https://brainly.com/question/8676275
Pls answer I am giving lots of points and need all the work shown. Determine the kb for chloroform when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.
Answers
Answer:0.87
Explanation:
which of the following may a suitable buffer mixture contain? select the correct answer below: significantly more acid than base significantly more base than acid roughly equal amounts of acid and base all of the above
Answers
Answer: roughly equal amounts of acid and base
Explanation:
The suitable buffer mixture may contain roughly equal amounts of acid and base.
A buffer solution is a solution that can resist changes in pH upon the addition of small amounts of an acid or a base. To make a buffer solution, roughly equal amounts of a weak acid and its conjugate base or a weak base and its conjugate acid are mixed.
A suitable buffer mixture may contain all of the above: significantly more acid than base, significantly more base than acid, or roughly equal amounts of acid and base. The key characteristic of a buffer is its ability to resist changes in pH, which requires both acid and its corresponding base.
So, a suitable buffer mixture can contain roughly equal amounts of acid and base.
To know more about buffer click here:
https://brainly.com/question/29763040
#SPJ11
For fun
need full details to win
would you rather be a man or a women and why
Answers
Answer:
A Man
Explanation:
Men have it a little bit easier, but at the same time, it depends on what each person is going through in their life.
Don't get me wrong I'm not saying men have it much easier but somethings favors men.
To be honest I don't if that made sense.
1. You can compare osmolarities of two solutions. Solution A=1Osm Glucose Solution B=2.5Osm Glucose Solution C=1OsmNaCl Answers: i) A is to B (hyperosmotic, isosmotic, hypoosmotic) ii) B is to A (hyperosmotic, isosmotic, hypoosmotic) iii) A is to C (hyperosmotic, isosmotic, hypoosmotic) iv) C is to A (hyperosmotic, isosmotic, hypoosmotic) 2. Body fluid osmolarity is 300mOsm. How will the following values change when you drink water? Would they increase, decrease, or not change?
Answers
i) A is to B: hypoosmotic (Solution A has a lower osmolarity compared to Solution B). ii) B is to A: hyperosmotic (Solution B has a higher osmolarity compared to Solution A)
iii) A is to C: isosmotic (Solution A and Solution C have the same osmolarity)
iv) C is to A: isosmotic (Solution C and Solution A have the same osmolarity)
When you drink water, the osmolarity of body fluids will decrease. This is because water is a hypotonic solution compared to body fluids.
Hypotonic refers to a solution that has a lower solute concentration compared to another solution or a reference solution. In a hypotonic solution, there is a higher concentration of water molecules relative to solute particles.
By drinking water, you are diluting the solute concentration in the body, leading to a decrease in osmolarity. Therefore, the values related to osmolarity, such as the concentration of solutes in the body fluids, would decrease.
To learn more about osmolarity
https://brainly.com/question/33463094
#SPJ11
chlorine is more reactive than sulphur
Answers
Answer:
this is true
Explanation:
chlorine only needs to lose one electron to become stable and sulphur needs to lose two
what are the common features of Mass, Volume, Magnetism, and Melting point?
Answers
Answer: they all are 4 properties of matter
Answer:
Explanation:
Mass is a scalar quantity. It has magnitude. In science, volume is a measure of the amount of three-dimensional space an object fills. It’s usually measured in cubic meters based on the SI or metric system. Volume can be represented by three axes – length, width, and height. In practice, however, volume in chemistry is commonly measured in liters and milliliters. Magnetism is a force that attracts (pulls closer) or repels (pushes away) objects that have a magnetic material like iron inside them (magnetic objects). In simpler words, it is a property of substances which pull closer or repel other objects. It is a subject in physics. The melting point of a substance is the temperature at which it changes state from solid to liquid.