5. Complete and balance an equation for each reaction:
CaI₂ + Hg(NO₃)₂ ---------> (HgI₂ precipitates)
Al + Cl₂ --------->
Ag + HCl ------->
C₂H₂ + O₂ ------->
MgCl₂ --------->
Answers
CaI₂ + Hg(NO₃)₂ --------->HgI₂ + Ca(NO3)2
2Al + 3Cl₂ --------->2AlCl3
Ag + HCl ------->AgCl + H2
C2H2 + 5O2 --------> 4CO2 + 2H2O
MgCl₂ --------->Mg + Cl2
Related Questions
Arrange the following in order of increasing atomic radius Mg,Cs,Ca,Al,Ba
Answers
The increasing order of atomic radius is as follows
Al, Mg, Ca, Ba, Cs.
The atomic radius increases from top to bottom of the periodic table and decreases from left to right .
From top to bottom of the periodic table the atomic size increases due to as electrons are added to a different shell. As the number of shells increases the atomic radius also increases.
From left to right of the periodic table, the electrons are filled in the same shell. But as the force of attraction from the nucleus increases due to the increase of negative charge as each electron fills, the shell shrinks. As a result the atomic radius also decreases.
So the increasing order of the atomic radius will be Al, Mg, Ca, Ba, Cs.
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Estimate the value of the equilibrium constant at 610 K for each of the following reactions.2NO2(g)⇋N2O4(g)ΔH∘fforN2O4(g)=9.16kJ/molBr2(g)+Cl2(g)⇋2BrCl(g)ΔH∘fforBrCl(g)=14.6kJ/molΔG∘fforBrCl(g)=−1.0kJ/mol
Answers
The estimated equilibrium constant for the reaction Br2(g) + Cl2(g) ⇋ 2BrCl(g) at 610 K is 1.16.
To estimate the equilibrium constant, we can use the equation:
ΔG° = -RTln(K)
where ΔG° is the standard Gibbs free energy change, R is the gas constant, T is the temperature in Kelvin, and K is the equilibrium constant.
For the reaction 2NO2(g) ⇋ N2O4(g), the given ΔH°f for N2O4(g) is 9.16 kJ/mol. Using this value, we can calculate the standard Gibbs free energy change:
ΔG° = ΔH° - TΔS°
where ΔS° is the standard entropy change. We do not have this value, but we can assume it is roughly constant for this type of reaction. Thus, we can estimate ΔG° to be:
ΔG° ≈ ΔH° = 9.16 kJ/mol
At 610 K, we have:
ΔG° = -RTln(K)
-9100 J/mol = -(8.314 J/mol/K)(610 K)ln(K)
ln(K) ≈ 2.37
K ≈ e^2.37 = 10.7
Therefore, the estimated equilibrium constant for the reaction 2NO2(g) ⇋ N2O4(g) at 610 K is 10.7.
For the reaction Br2(g) + Cl2(g) ⇋ 2BrCl(g), we are given the ΔH°f for BrCl(g) as 14.6 kJ/mol and the ΔG°f for BrCl(g) as -1.0 kJ/mol. Using the same assumptions as before, we can estimate ΔG° to be:
ΔG° ≈ ΔH° = 14.6 kJ/mol
At 610 K, we have:
ΔG° = -RTln(K)
-1000 J/mol = -(8.314 J/mol/K)(610 K)ln(K)
ln(K) ≈ 0.15
K ≈ e^0.15 = 1.16
Therefore, the estimated equilibrium constant for the reaction Br2(g) + Cl2(g) ⇋ 2BrCl(g) at 610 K is 1.16.
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1.
а
Which example shows a relationship between a
living thing and a nonliving thing?
A.
An insect is food for a salmon.
B.
Water carries a rock downstream.
C. A tree removes a gas from the air.
(D.) A flower makes food for a butterfly.
Answers
What volume of water would you add to 15. 0 ml of 12 m hcl to make it to 6. 0 m solution?.
Answers
30 ml volume of water have to add to 15. 0 ml of 12 m hcl to make it to 6. 0 m solution.
How do you calculate the volume of a solution needed?
Molarity, the most typical unit of concentration, is also the most helpful for calculating the stoichiometry of reactions in solution. The number of moles of solute contained in precisely 1 L of solution is known as the molarity, or M. In other words, it is the amount of millimoles of solute in exactly 1 mL of solution.Molarity = moles of solute / liters of solution.Anyone who has prepared instant coffee or lemonade before is aware that using too much powder results in a drink with a strong flavor and a high concentration of sugar, while using too little yields a diluted solution that may be difficult to differentiate from water. The amount of a solute present in a certain amount of solvent or solution is known as the concentration of a solution in chemistry.Given data
So first we set up the dilution equation: M1*V1=M2*V2
M: Molarity
V: Volume
We can set these equal in a dilution equation because Molarity is Miles per Volume, and by multiplying it by Volume we get Moles on each side. Moles of solute remain equal throughout a dilution since you are just adding water.
Next, we plug in our knowns:
(12.00M HCl)(15.00ml)=(6.00M HCl)(V2)
V2 = 15 X 12 / 6 = 30ML
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The NO molecule has an electronic fundamental level that is doubly degenerated, and its first excited level is at 121.1 cm-1, which is also doubly degenerated. Determine the contribution of the electronic degrees of freedom to the standard molar entropy of NO. Compare your result to Rln(4). Which is the meaning of this comparison?
Answers
The NO molecule has a doubly degenerate fundamental electronic level and a doubly degenerate first excited level at 121.1 cm-1.
To determine the contribution of electronic degrees of freedom to the standard molar entropy of NO, we need to consider the Boltzmann distribution. The relative population of the excited state to the fundamental state is given by the Boltzmann factor: e^(-ΔE/kT), where ΔE is the energy difference between the states, k is the Boltzmann constant, and T is the temperature. Since both levels are doubly degenerate, the total electronic partition function (q_e) is 2 + 2e^(-ΔE/kT). The molar electronic entropy (S_e) can be calculated using S_e = Rln(q_e). At room temperature (298 K), S_e ≈ Rln(4), as the excited state's population is much smaller compared to the fundamental state. The comparison of S_e to Rln(4) shows that, at room temperature, the electronic entropy of NO is mainly determined by its doubly degenerate ground state and excited state, and the higher energy states contribute negligibly to the entropy. Hydrogen bonds are present in water molecules. When a hydrogen (H) atom is bonded to an atom with a strong electronegative charge, it forms a hydrogen bond, which attracts polar groups.
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Question
A watershed is the area of land where all of the water drains off and eventually combines at a central point. As water runs off it picks up different types of surface pollution leftover from agricultural, industrial, commercial, and other types of human activity. Why does the pollution in a watershed have such a heavy impact on its inhabitants?
Responses
A the water combines and the pollutants become more concentratedthe water combines and the pollutants become more concentrated
B the water combines and the pollutants become less concentratedthe water combines and the pollutants become less concentrated
C the species that inhabit the watershed must have the pollution in order to survivethe species that inhabit the watershed must have the pollution in order to survive
D pollution does not affect the inhabitants of a watershed
Answers
The pollution in a watershed have such a heavy impact on its inhabitants because the water combines and the pollutants become more concentrated.
What is pollution?Pollution is defined as the introduction of harmful material to the environment. These harmful material is called pollutant.
Pollutant can be natural such as volcanic ash. They can also be created by human effect.
There are four types of pollution
Water pollutionLand pollutionAir pollution Soil pollutionThus, the pollution in a watershed have such a heavy impact on its inhabitants because the water combines and the pollutants become more concentrated.
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A) 2 and 3 only
B) 1 and 4 only
C) 2,3,4 only
D) all of the above
choose one correct answer
Answers
Answer:
D
\( \: \: \: \: \)
Formal charge is calculated by assigning each atom _____ the bonding electrons that it shares. Oxidation number is determined by assigning all the shared electrons of a particular bond to the atom with the _____ electronegativity. Multiple choice question. half; higher half; lower all; lower all; higher
Answers
Answer:
A). half, higher
Explanation:
The Formal charge is elaborated as the 'allocated charge to a molecules' atom' on the basis of the assumption that the electrons present in the chemical bond are equally split among the atoms. It is estimated by 'halving the no. of bonding electrons that encircle the atom.
While Oxidation number is characterized as the 'hypothetical charge of an atom that is present within a molecule.' It is also defined as 'the actual number of lost or gained electrons or the rate at which the electrons are gained or lost by an atom to develop a chemical bond along with the other atom.' It is calculated by allocating or sharing the electrons having the higher electronegativity belonging to a specific bond with the other. Thus, option A is the correct answer.
In science, what is occurring when two atoms slam together to form a heavier atom?
Answers
In Science, went to atom slam together to form a heavier atom this phenomena is called fusion.
Went two atoms slam together to form a heavier item this process is called nuclear fusion in science.
When they are to unstable atoms they combine with each other in order to form a stable atom that is much more heavier.
In the process of recombination energy is released by the items which can be given by the mass energy equivalence,
E = ∆mc²
Where,
∆m is the change in mass during the recombination and c is the speed of light.
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What is the most convenient unit to use to express the dimensions of a polio virus, which is about 2.8 x 10^-8 m in diameter?
a.) Mm
b.) mm
c.) um
d.) nm
Answers
The correct option is d)nm.
The polio virus is an extremely small object, and its diameter is only about 2.8 x 10^-8 meters. As a result, it is more convenient to express its dimensions in a smaller unit of length. There are several options for units of length that could be used to express the size of a polio virus, but the most convenient one depends on the context in which it is being used.Since the polio virus is a very small object, expressing its size in meters is not very convenient. However, nanometers (nm) and micrometers (µm) are commonly used units of length to describe the size of viruses, bacteria, and other small objects. Of the two, nanometers are the most commonly used unit for viruses due to their small size.
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:answer question number 5
Answers
Answer:
it is simple true and thanks for point
Answer:
True
Explanation:
TRUST:)
7.Which of the following is an example of an element?A.Iron B. Hydrogen peroxide C. Salt D. Water
Answers
An example of an element is a. iron. Others are compounds and not elements.
A chemical emulsion that can not be converted into another chemical substance is known as an element. tittles are the abecedarian structure blocks of chemical rudiments. Each chemical element is linked by the infinitesimal number, or the volume of protons in its tittles' nexus.
For case, the infinitesimal number 8 of oxygen indicates that each oxygen snippet's nexus has 8 protons. As opposed to chemical composites and composites, which include tittles with multiple infinitesimal figures, this isn't the case.
The maturity of the macrocosm's baryonic stuff is made up of chemical rudiments; neutron stars are one of the veritably many exceptions. Tittles are rearranged into new composites linked together by chemical bonds when colorful rudiments suffer chemical responses.
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Western Company is preparing a cash budget for June. The company has $12,000 in cash at the beginning of June and anticipates $30,000 in cash receipts and $34,500 in cash payments during June. Western Company has an agreement with its bank to maintain a minimum cash balance of $10,000. As of May 31, the company has no loans outstanding. To maintain the $10,000 required balance, during June the company must:
Answers
Answer:
Explanation:
To maintain the required minimum cash balance of $10,000, Western Company needs to carefully manage its cash inflows and outflows during June. Let's calculate the necessary steps:
Starting cash balance (June 1): $12,000
Cash receipts (June): $30,000
Cash payments (June): $34,500
Determine the minimum cash balance:
Minimum cash balance: $10,000
Calculate the available cash balance:
Available cash balance = Starting cash balance + Cash receipts - Cash payments
Available cash balance = $12,000 + $30,000 - $34,500
Available cash balance = $7,500
Compare the available cash balance with the required minimum cash balance:
Since the available cash balance ($7,500) is less than the required minimum cash balance ($10,000), Western Company needs to take action to meet the minimum requirement.
Options to maintain the required minimum cash balance:
a) Reduce cash payments: Western Company can analyze its cash outflows and try to reduce expenses or postpone non-essential payments to ensure they don't fall below the required minimum.
b) Use a short-term loan: If reducing cash payments is not sufficient, the company can consider taking a short-term loan to temporarily increase the available cash balance. This loan should cover the shortfall and be repaid as soon as possible to avoid additional costs.
By implementing one or both of these strategies, Western Company can maintain the minimum cash balance of $10,000 required by its agreement with the bank.
write the chemical equation for the reaction whose enthalpy change is the standard enthalpy of formation of sucrose,
Answers
The chemical equation for the reaction, the enthalpy change of which is equal to the standard enthalpy of sucrose formation, C12H22O11; C6H12O6 (s) + 6 O2 (g) + 11 H2O (l) Δ H is equal to -2,837 kJ/mol.
What is Chemical equation?
A chemical equation is a graphical representation of a chemical reaction, with the reactants (the starting materials) on the left and the products (the end materials) on the right. It uses chemical formulas to identify the reactants, products, and direction of the reaction.
As an example: 2H2 + O2 → 2H2O
In this equation, two molecules of hydrogen (2H2) react with one molecule of oxygen (O2) to form two molecules of water (2H2O).
What does Molecules mean?
Molecules are the tiniest particles of a substance that can still be identified as such. They are composed of atoms held together by chemical bonds. Molecules are the fundamental building blocks of matter and are required for life on Earth. Molecules are important for a variety of reasons. They play a role in how substances interact with one another and react to form new substances. They are also important in energy transfer and signal transmission within the body.
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When a material made of iron rusts, its mass increases so does this observations violate the law of conservation of mass?
Answers
Nitrogen dioxide, a major air pollutant, can be produced by the combustion of nitrogen oxide as shown. 2NO + O2 Right arrow. 2NO2 In a plant, 1,500 kg of nitrogen oxide is consumed per day to produce 1,500 kg of nitrogen dioxide per day. What is the percent yield? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100.. 21.7% 32.6% 43.5% 65.2% Mark this and return Save and Exit Next Submit
Answers
Answer:
65.2%
Explanation:
It is given that :
\($2NO + O_2 \rightarrow 2NO_2$\)
Therefore, 60 g of nitrogen oxide will produce 92 g of nitrogen dioxide
or 60 kg of nitrogen oxide will produce 92 kg of nitrogen dioxide
or 1500 kg of nitrogen oxide will produce \(2300\ kg\) of nitrogen dioxide
Therefore the percentage yield = (Actual yield / Expected yield) x 100
percentage yield = \($\frac{1500}{2300} \times 100$\)
Percentage yield = 65.217 %
Answer:
the person above me is correct, the answer for this is 65.2% or option D!
Explanation:
thank you person above me! i got a 100% on the test! :D
according to the kinetic molecular theory of gases, why does no gas exhibit ideal behavior at all temperatures and pressures?
Answers
No gas exhibits ideal behavior at all temperatures and pressures because the kinetic molecular theory assumes that gas particles have zero volume and no intermolecular forces, which is not true for real gases.
According to the kinetic molecular theory, ideal gases are composed of particles that are point masses with no volume. They are in constant motion, experiencing completely elastic collisions and having no intermolecular forces between them. However, this is an ideal scenario that real gases don't live up to.
Real gases have volume and occupy space, and the intermolecular forces of attraction and repulsion between their particles must be taken into account. These deviations from the assumptions of the kinetic molecular theory prevent any gas from exhibiting ideal behavior at all temperatures and pressures. Hence, no gas can be considered ideal as there is no gas that satisfies the Kinetic Molecular Theory.
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What i your control group in thi experiment. Why i it important to have a control
Answers
Having control groups makes your research internal validity more certain.
The treatment group should be the only variable that varies between the two groups in an experiment. This guarantees that the complete effect of the treatment may be accurately measured without the variables being confounded.
The control group is the group that does not receive any therapy, a regular treatment, or a bogus treatment that can be used to control a placebo.The control group consists of participants who do not receive the experimental therapy. During an experiment, these people are randomly assigned to this group. They also bear a striking resemblance to people who participate in the trial or those who receive the treatment.
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Which is an example of a physical change?
gasoline combusting
cake baking
salt dissolving
iron rusting
Answers
Answer:
salt dissolving
Explanation:
Hope this helps!
What is the best description of radiation
Answers
Radiation is the emission and propagation of energy in the form of waves, rays, or particles. There are three main types of radiation Non-ionizing radiation , Ionizing radiation, and Neutrons.
Non-ionizing radiation is the release of energy from the lower-energy region of the electromagnetic spectrum. Ionizing radiation is radiation with sufficient energy to remove an electron from an atomic orbital, forming an ion. Neutrons are particles found in the atomic nucleus.
Radiation includes the emanation of any portion of the electromagnetic spectrum, plus it includes the release of particles. An example is a burning candle that emits radiation in the form of heat and light. Radiation is the release of energy, whether it takes the form of waves or particles. Radioactivity refers to the decay or splitting of an atomic nucleus. A radioactive material releases radiation when it decays.
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The rows in the periodic table are called periods.
What is true about elements in the same period?
Answers
Answer:
elements in the same period have the same number of shells
the period number the element is in, that is the number of shells it has.
Iron is a type of metal that has a shiny surface. However, iron can rust easily. Explain
Answers
Answer:
Iron, as well as iron alloys, rusts because of a chemical reaction known as oxidation. When iron is exposed to moisture or oxygen, oxidation occurs. During this chemical reaction, iron is converted into iron oxide. ... Both oxygen and moisture are catalysts for rusting.
Answer:
Iron rusts because of of a chemical reaction known as oxidation. During the chemical reaction iron is converted to iron oxide, if it is left unaddressed, the iron oxide will spread, thereby jeopardizing the physical integrity of the iron.
Potassium Chlorate (KCIO3) is used commonly for the laboratory preparation of oxygen gas. Calculate its formula mass.
Answers
The formula mass of potassium chlorate (\(KCIO_3\)) is 170.55 g/mol.
Add the atomic masses of all the atoms in the compound according to their respective subscripts in order to determine the formula mass, sometimes referred to as the molar mass or molecular weight, of a compound.
The periodic table lists the atomic masses of the elements. The atomic masses of the constituent components in potassium chlorate (\(KCIO_3\)) are as follows:
Potassium's (K) atomic weight is 39.10 g/mol.
Chlorine's (Cl) atomic weight is 35.45 g/mol.
Oxygen's atomic mass (O) is 16.0 g/mol.
Let's now compute the potassium chlorate (KCIO3) formula mass:
Formula mass = (K atomic mass) + (Cl atomic mass) + 3 x O atomic mass
= 39.10 g/mol + 35.45 g/mol + 3 x 16.00 g/mol
= 39.10 g/mol + 35.45 g/mol + 48.00 g/mol
= 122.55 g/mol + 48.00 g/mol
= 170.55 g/mol
Therefore, the formula mass of potassium chlorate (KCIO3) is 170.55 g/mol.
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What is the approximate volume of 280 g of chlorine gas (Cl2) at STP?
Answers
Answer:
the approximate volume of 280 g of chlorine gas (Cl2) at STP is 78L Cl2
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Ideal gas is a hypothetical gas. Therefore, 89.6L is the approximate volume of 280 g of chlorine gas (Cl\(_2\)) at STP.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Vanderwaal gas can behave as ideal gas at low pressure and high temperature.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of gas=1atm
V= volume of gas=?
n =number of moles of gas =given mass/molar mass
=280 g/70g/mol
=4mole
T =temperature of gas=273K
R = Gas constant = 0.0821 L.atm/K.mol
substituting all the given values in the above equation, we get
1×V=4×0.0821×273
V=89.6L
Therefore, 89.6L is the approximate volume of 280 g of chlorine gas (Cl\(_2\)) at STP.
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CaCO3(s) CaO(s) + CO₂(g)
4
3.25 mol CaCO3 decomposes
according to the reaction above.
What volume of CO2 gas is
produced once the gas cools to
STP?
Answers
How to Draw the Lewis Structure for IF5
Answers
See the attached image.
How many bacteria would there be in 100 cm' of yoghurt drink made from 1cm of the purchased yoghurt drink diluted with 99 cm° of pasteurised milk
Answers
There are 65000000000 bacteria that would definitely be found in 100 cm' of yogurt drink made from 1cm of the purchased yogurt drink diluted with 99 cm° of pasteurized milk.
Which bacteria are used to make yogurt?Yogurt is generally made with the help of utilizing a bacterium that is known as Lactobacillus acidophilus. It is a small sample of bacteria, known as a culture, is added to pasteurized milk.
According to the context of this question, most commercially produced yogurts begin life as pasteurized milk, which is then processed with cultures of beneficial bacteria such as Lactobacillus acidophilus, Bifidobacteria, or Streptococcus thermophilus. Many are then pasteurized again, which kills this beneficial bacteria.
Therefore, there are 65000000000 bacteria that would definitely be found in 100 cm' of yogurt drink made from 1cm of the purchased yogurt drink diluted with 99 cm° of pasteurized milk.
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Determine the partial pressure and number of moles of each gas in a 16.75L vessel at 30 degree C containing a mixture of xenon and neon gases only. The total pressure in the vessel is 7.10 atm, and the mole fraction of xenon is 0.721.
What is the partial pressure of xenon?
What is the partial pressure of neon?
What is the number of moles of xenon?
What is the number of moles of neon?
Answers
First, we will calculate the number of moles of mixture of Xenon and Neon gases.Number of moles of mixture of Xenon and Neon gases:
Let x be the mole fraction of Neon.
Therefore, (1 - x) is the mole fraction of Xenon
.Mole fraction of Neon + Mole fraction of Xenon = 1x + (1 - x) = 1x = 1 - (1 -
x = 0 + x
x = 0.279
Mole fraction of Neon = 0.279
Mole fraction of Xenon = 0.721
Number of moles of gas = (Total Pressure * Volume)/(Gas Constant * Temperature)
Number of moles of Xenon = (7.10 atm * 16.75L * 0.721)/(0.08206 * (273 + 30))
Number of moles of Xenon = 8.44 moles
Number of moles of Neon = (7.10 atm * 16.75L * 0.279)/(0.08206 * (273 + 30))
Number of moles of Neon = 3.29 moles
Now, we can calculate the partial pressure of Xenon and Neon.
Partial pressure of Xenon:
Partial Pressure of Xenon = Mole fraction of Xenon * Total Pressure
Partial Pressure of Xenon = 0.721 * 7.10 atm
Partial Pressure of Xenon = 5.12 atm
Partial pressure of Neon
Partial Pressure of Neon = Mole fraction of Neon * Total Pressure
Partial Pressure of Neon = 0.279 * 7.10 atm
Partial Pressure of Neon = 1.98 atm
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PRACTICE
1. The mathematical statemel, 2 + 2 = 4, is a fact. Imagine you have a bunch of apples. How could you use the
apples to prove this statement is a fact?
Answers
Answer:
If you take 4 apples and divide them by 2 there will be 2 apples in each set so if you add both sets of apples which is 2+2 there would be 4 apples
Form a hypothesis You are cleaning out a cabinet beneath the kitchen sink and find an unused steel wool scrub pad has rusted completely. Will the remains of this pad weigh more or less than when it was new?
Answers
My hypothesis is that the remains of the steel wool scrub pad will weigh less than when it was new due to the process of oxidation causing the rusting.
When steel wool comes into contact with oxygen and moisture, it undergoes a chemical reaction known as oxidation. This reaction causes the iron in the steel wool to form iron oxide or rust. Since rust is less dense than iron, the steel wool scrub pad will weigh less when it is completely rusted.
It is important to note that the weight loss may be minimal, as rust is still composed of iron and oxygen, so the difference in weight may not be noticeable. Additionally, other factors such as the amount of time the pad has been rusting and the type of steel wool used may also affect the final weight.
In conclusion, my hypothesis is that the remains of the steel wool scrub pad will weigh less than when it was new due to the process of oxidation causing rusting, but the difference in weight may not be significant.
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