The statement about the hydrolysis of the disaccharide maltose to two glucose units is true is The hydrolysis reaction involves the breaking of two covalent bonds.
What is hydrolysis reaction?One molecule disintegrates into several smaller molecules during a hydrolysis reaction. An ester is hydrolyzed by acid to produce a carboxylic acid and an alcohol. A carboxylate salt and an alcohol are produced by the basic hydrolysis (saponification) of an ester. When water interacts with another chemical substance, two or more products are produced. Some instances of hydrolysis include dissolving a weak acid or base salt in water or dissolving sulfuric acid in water, which results in the formation of hydronium and bisulfate compounds. A chemical reaction in which a substance is broken down using water. This is done by introducing a water molecule across a covalent link in the component.To learn more about hydrolysis reaction refer to;
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Explain why the middle portion of ship shows more rust than either the top most or the bottom most part
Answer:
A ship comprises of both visible as well as invisible parts. . The most forward part of a ship is called a Bow, the left-hand side of . at a topmost accessible height of the ship and just above the bridge . The mast is a rangy spar arrangement which is elevated more or less vertically to the Centre line of a ship .
Research the ecology of your region and find one species that is endangered. Find an estimate of the population of the species in your region. Describe the threats facing that species, especially threats posed by human activities.
The endangered species in my region with their estimate population are:
Northwestern African Cheetah - 250 West African Lion - 400 What threat faces Northwestern African Cheetah?This cheetah is said to be an endangered species because of their loss of their habitat and also due to fragmentation, trade and little human-activities.
West African Lion is said to be an endangered species because the lion's historic range in West Africa was said to be lowered by a lot of amount or scale as a result of land use changes and human activities such as falling of trees, buildings, etc.
Hence the endangered species in my region with their estimate population are:
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Calculate the pOH for the following:
1. [H+] = 1 x 10-12 M
2. [OH-] = 1 x 10-6 M
3. [H+] = 1 x 10-1 M
4. [H+] = 1 x 10-4 M
5. [OH-] = 1 x 10-7 M
The pOH refers to the negative logarithm of the hydroxide concentration.
What is the pOH?The term pOH refers to the negative logarithm of the hydroxide concentration. Now we know that there is a relation that states that;
[H+] [OH-] = 1 * 10^-14
We shall now apply this relation in each case as follows;
[OH-] = 1 * 10^-14/1 x 10-12
[OH-] = 1 * 10^-2
pOH = 2
2. pOH = -log( 1 x 10-6 M) = 6
3. [OH-] = 1 * 10^-14/ 1 x 10-1
[OH-] = 1 * 10^-13
pOH = 13
4. [OH-] = 1 * 10^-14/ 1 x 10-4
[OH-] = 1 * 10^-10
pOH = 10
5. pOH = -log( 1 x 10-7) = 7
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Volume is: A. Non of these. B. How much matter something contains.
Consider the balanced equation:
Mg2Si (s) + 2 H2O (l) ---> 2 Mg(OH)2 (aq) + SiH4 (g)
Calculate the grams of silane gas, SiH4, formed when 8.48 g of Mg2Si react with excess H2O.
2. Consider the balanced equation:
4 NH3 (g) + 7 O2 (g) ---> 4 NO2 (g) + 6 H2O (g)
What is the mass of H2O produced when 109.4 g of NH3 is completely reacted
1. The mass of silane gas, SiH₄ formed from the reaction is 3.57 g
2. The mass of H₂O produced from the reaction is 173.75 g
1. How to determine the mass of SiH₄ formedBalanced equation
Mg₂Si (s) + 4H₂O (l) ---> 2Mg(OH)₂ (aq) + SiH₄ (g)
Molar mass of Mg₂Si = (24×2) + 28 = 76 g/mol
Mass of Mg₂Si from the balanced equation = 1 × 76 = 76 g
Molar mass of SiH₄ = 28 + (4×1) = 32 g/mol
Mass of SiH₄ from the balanced equation = 1 × 32 = 32 g
SUMMARY
From the balanced equation above,
76 g of Mg₂Si reacted to produce 32 g of SiH₄
From the above information, we can obtain the mass of SiH₄ produced by the reaction of 8.48 g of Mg₂Si as illustrated below:
From the balanced equation above,
76 g of Mg₂Si reacted to produce 32 g of SiH₄
Therefore,
8.48 g of Mg₂Si will react to produce = (8.48 × 32) / 76 = 3.57 g of SiH₄
Thus, 3.57 g of SiH₄ were obtained from the reaction.
2. how to determine the mass of H₂O producedBalanced equation
4NH₃ (g) + 7O₂ (g) ---> 4NO₂ (g) + 6H₂O (g)
Molar mass of NH₃ = 14 + (1×3) = 17 g/mol
Mass of NH₄ from the balanced equation = 4 × 17 = 68 g
Molar mass of H₂O = (2×1) + 16 = 18 g/mol
Mass of H₂O from the balanced equation = 6 × 18 = 108 g
SUMMARY
From the balanced equation above,
68 g of NH₃ reacted to produce 108 g of H₂O
From the above information, we can obtain the mass of H₂O produced by the reaction of 109.4 g of NH₃ as illustrated below:
From the balanced equation above,
68 g of NH₃reacted to produce 108 g of H₂O
Therefore,
109.4 g of NH₃ will react to produce = (109.4 × 108) / 68 = 173.75 g of H₂O
Thus, 173.75 g of H₂O were obtained from the reaction.
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A 1.00-mole sample of dry ice (solid CO₂) is placed in a flexible, sealed container and allowed to sublime. After complete sublimation, what will be the
container volume, in liters, at 26°C and 0.983 atm pressure?
Container volume, 26°C, and 0.983 atm pressure is =24.9 liters.
What is a Moles?A mole is defined as the quantity of a material that includes precisely 6.02214076 X 1023 of the substance's elementary entities.A substance is said to have a mole with a mass equal to 12.000 g of 12C and the same number of basic units as atoms.The mole can be used to calculate the quantities involved in chemical processes and identify the simplest formula of a compound. The molarity notion, which is related, helps discuss reactions in solutions. The number of moles of a solute in a liter of solution is known as molarity (M).Quantities that cannot be quantified using units like grams or milligrams are referred to as moles. A mole thus counts the quantity of atoms, ions, or molecules.Container volume, in liters, at 26°C and 0.983 atm pressure:
Given=1.00
V=?
PV=nRT
T=26°C+273.15
=299.15K
R=0.08201Lamt/k
P=0.983atm
V=nRT/p
[tex]V=\frac{1.00 mole(0.08201Lamt/k)299.15K}{0.983atm}[/tex]
V=24.9 liters
Container volume, 26°C, and 0.983 atm pressure is =24.9 liters.
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The Volume in the container is 25L .
What is Ideal Gas?
Ideal gas is hypothetical gas whose molecules occupy negligible space and have no interaction, and which consequently obeys the gas laws exactly.
We have given
Pressure=0.983atm
moles=16
Temperature= 26°C
T →273+26=299K
Volume = ?
PV = nRT
V= 1×0.0821×299/0.983
By solving this equation we get
V= 24.9L≈25L
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If I have 4.5 liters of gas at a temperature of 33 0C and a pressure of 6.54 atm, what will be the pressure of the gas if I raise the temperature to 94 0C and decrease the volume to 2.3 liters?
This is an exercise in the general or combined gas law.
To start solving this exercise, we must obtain the following data:
Data:V₁ = 4.5 lT₁ = 33 °C + 273 = 306 kP₁ = 6.54 atmT₂ = 94 °C + 273 = 367 kV₂ = 2.3 lP₂ = ¿?We use the following formula:
P₁V₁T₂ = P₂V₂T₁ ⇒ General FormulaWhere
P₁ = Initial pressureV₁ = Initial volumeT₂ = Initial temperatureP₂ = Final pressureV₂ = Final volumeT₁ = Initial temperatureWe clear the general formula for the final pressure.
[tex]\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{P_{1}V_{1}T_{2} }{V_{2}T_{1}} \ \to \ Clear \ formula \end{gathered}$}[/tex]
We solve by substituting our data in the formula:
[tex]\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{(6.54 \ atm)(4.5 \not{l})(367 \not{K}) }{(2.3 \not{l})(306 \not{k})} \end{gathered}$}[/tex]
[tex]\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{10800.81}{ 703.8 } \ atm \end{gathered}$}[/tex]
[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf P_{2}=15.346 \ atm \end{gathered}$} }[/tex]
If I raise the temperature to 94°C and decrease the volume to 2.3 liters, the pressure of the gas will be 15,346 atm.
Answer:
15.35 atm
Explanation:
Combined Gas Law
[tex]\sf \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]
Temperature must be in kelvins (K).
To convert Celsius to kelvins, add 273.15.
Volume can be in any unit.
Given values:
P₁ = 6.54 atmV₁ = 4.5 LT₁ = 33 °C = 33 + 273.15 = 306.15 KP₂ = V₂ = 2.3 LT₂ = 94 °C = 94 + 273.15 = 367.15 KRearrange the equation to isolate P₂:
[tex]\sf \implies P_2=\dfrac{P_1V_1T_2}{V_2T_1}[/tex]
Substitute the given values into the equation:
[tex]\sf \implies P_2=\dfrac{6.54 \cdot 4.5 \cdot 367.15}{2.3 \cdot 306.15}[/tex]
[tex]\sf \implies P_2=15.34516967[/tex]
Therefore, the pressure of the gas will be 15.35 atm (2 d.p.).
which gas law is not included in the combined gas law
Answer:
Watson law is not part of the combined gas law
There are 5 basic gas laws of ideal gases:
Boyle's Law: volume (V) is inversely proportional to pressure (P)Charles' Law: V is proportional to temperature (T)Gay-Lussac's Law: P is proportional to TDalton's Law: The total pressure exerted by a mixture of ideal gases is equal to the sum of the pressures of the individual gasesAvogadro's Law: All equal volumes of ideal gases contain the same number of gas particles (at constant T and P); V is proportional to moles (n)The Combined Gas LawThis law features Charles', Boyle's and Gay-Lussac's laws.
Therefore, Dalton's and Avogadro's laws are exluded.
Which of the following was an incentive for profit to settle the Mississippi Valley region?
Availability of fish and furs
Abundance of Native Americans to convert to Catholicism
Mildness of the temperature of the region
Excitement of the wilderness
The correct option is (a) Availability of fish and furs. An incentive for profit to settle the Mississippi Valley region
Arkansas, Illinois, Iowa, Kentucky, Louisiana, Michigan, Minnesota, Mississippi, Missouri, North Dakota, Tennessee, Wisconsin, and South Dakota are among the 13 states that are either entirely or partially included in the division of Mississippi Valley region
The canoe was the first ferry to travel on the Mississippi River. Long before the white settlers ventured as far west as the Mississippi, it provided the Indians with a means of crossing. It is also one of the most significant commercial waterways in the world and a key fish and bird migration route in North America. Native Americans used the river for transportation and food while they lived along its banks.
Therefore, The correct option is (a) Availability of fish and furs. An incentive for profit to settle the Mississippi Valley region.
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The cell membrane is
a)semi permeable
b)selectively permeable
Answer:
A. Semi Permeable.
Explanation:
Cell membranes are semi permeable.
determine the percentage composition by mass of each of the elements in the following compounds
a. calcium chloride, cacl2
Answer:
63.9%
Explanation:
moral mass of x (# x ions) -divided by- Moral mass of compound.
% of cl = (35.5g) (2 cl ions) -divided by- 111.1g × 100
%= 63.9%
Positive ions usually form from ____
and are called cations.
Metals
Noble gases
Nonmetals
Answer:
Metals
Explanation:
Positive ions are formed when atoms give up some valence electrons in order to have a full octet. The atoms most likely to do this have a small number of valence electrons. Most to these atoms are generally in the s-block (left side) of the periodic table. These elements are metals.
*nonmetals are located in the p-block (right side) and noble gases are located in the 18th column (far right column)
Abc Which excerpt from an essay about higher education most clearly shows an example of logos? According to recent studies, more women than ever are attending four-year colleges. In fact, 36.6 percent of women attended college in 2019, compared to 35.4 percent of men. O When I went to college in 1994, I was the first person in my family to do so. My mother stood in my dorm room, surrounded by boxes of clothes and trinkets and holding back tears. O I was in awe of my sociology professor, who had studied the historical impacts of food in African American culture for 10 years. She spoke with such passion and energy that it was difficult to take your eyes off her. O Many college students look to land an exciting internship, believing that it will open doors in their field of study. However, internships can often distract from schoolwork. Mark this and return Save and Exit Next Submit
The excerpt from an essay about higher education that most clearly shows an example of logos is:
Option d: Many college students look to land an exciting internship, believing that it will open doors in their field of study. However, internships can often distract from schoolwork.What is Logos?The Logos Definition is one that is often argued by a lot of people as people tends to appeal to others emotions and some other times, people do appeal to one's' ethics or morals.
The term logos is a term that connote the use of logic. It also includes the use of deductive reasoning to get to a conclusion.
The excerpt from an essay about higher education that most clearly shows an example of logos is:
Option d: Many college students look to land an exciting internship, believing that it will open doors in their field of study. However, internships can often distract from schoolwork.Option d is correct because it shows the cause and its effect.
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How are microfauna measured?
In centimeters
In millimeters
In nanometers
Any of the above
Microfauna are measured in all of the above units and is denoted as option D.
What is Microfauna?These are referred to as microscopic animals which lack mitochondrion and exists in the soil etc. The nematodes and protozoa are mostly common organisms among them.
Microfauna can be seen with the use of microscope and can be measured in centimeters, millimeters etc based on the size of their body structure.
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Copper metal has a face-centered cubic structure with all atoms at lattice points and a density of 8.93 g/cm^3. The edge length of the unit cell is 361.5 pm. Calculate the mass of 1 atom of copper.
The mass of 1 atom of copper metal in the given face-centered cubic structure is determined as 1.054 x 10⁻²² g.
Mass of 1 atom of copperThe mass of 1 atom of copper is calculated as follows;
mass of 1 atom of copper = molar mass of copper / Avogadro's number
substitute the value of molar mass of copper and Avogadro's number;
mass of 1 atom of copper = (63.5 g/mol) / (6.023 x 10²³)
mass of 1 atom of copper = 1.054 x 10⁻²² g
Thus, the mass of 1 atom of copper is determined as 1.054 x 10⁻²² g.
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Gelatin is a solid that can strengthen protein networks. How would yogurt that contains gelatin be different from yogurt that does not contain gelatin? Explain your answer.
Ice cream that contains gelatin will have a thicker consistency than on that does not contain gelatin.
What is gelatin?Gelatin is a proteoglycan which is made from boiling tendons.
Gelatin is used as a thickening agent.
Therefore Ice cream that contains gelatin will have a thicker consistency than on that does not contain gelatin.
In conclusion, gelatin is used to thicken foods.
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PLEASE HELP!!!
A sample of nitrogen at 20.0 °C has a volume of 588 mL at a pressure of 924 mmHg. To change the volume to 1008 mL, what must be the new pressure?
Answer:
539 mmHg
Explanation:
Using Boyle's Law,
(588)(924)=(1008)(pressure)
So, the pressure is 539 mmHg.
A student measures the length of an object to be 152 cm. What is the measurement in km?
Answer: 0.00152 km
Explanation:
significant use of boiling point in daily life
Answer:
boiling point can be used to tell how long something I.e water would take to boil.
boiling point can also tell us the amount if heat needed to be applied for the substance to boil
15) The average human is ~60% water, which translates to ~44.3 kg of water. If you eat a Reece's peanut butter cup (105 Calories or 4.39 x 105J), how many degrees Celsius (°C) should the 44.3kg of water rise. The specific heat of water is 4.184 J/g.°C. A) 2.37 x 103°C B) 5.66 x 104°C C) 41.5°C D) 2.37°C E) 0.566°C 4.39x1055 0.043 y 4.18488.0
Answer: D) 2.37°C
Explanation:
[tex]4.39x10^5J(\frac{g°C}{4.184J} )(\frac{kg}{1000g})(\frac{1}{44.3kg} )[/tex] [tex]=2.37°C[/tex]
(A) O ( B) La (C) Rb (D) Mg (E) N
1. What is the most electronegative element of the above?
2. Which element exhibits the greatest number of different oxidation states?
3. Which of the elements above has the smallest ionic radius for its most commonly found ion?
1. The most electronegative element is O (a)
2. The element that exhibits Greatest number of oxidation states is N (e)
3. The Smallest ionic radius for its most common ion is found for Mg (d)
1. Electronegativity is tendency of an atom to attract shared pair of electrons. Across a period, it increases from left to right while in a group, it decreases as we move down. The most electronegative elements are found in the top right of the periodic table because of the increase in effective nuclear charges. Hence, O is most electronegative element.
2. Oxidation state is the total number of electrons that an atom can either gain or loss to form a chemical bond. N exhibits a wide range of oxidation states from -3 to +5 because of half filled p orbital which is more stable.
3. Ionic radius is the radius of a monatomic ion in an ionic crystal structure. [tex]Mg^{2+}[/tex] has higher number of protons that will attract the negatively charged valence electrons to a greater extent hence shortening the distance.
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Do the following statement describe physical or chemical property.
Uranium is a radioactive element
The fact that uranium is a radioactive element is a chemical property. Details about radioactivity can be found below.
What is radioactivity?Radioactivity is the spontaneous emission of ionizing radiation as a result of a nuclear reaction.
Radioactivity, which is the emission of particles from an unstable nucleus, is a chemical property.
Therefore, it can be said that the fact that uranium is a radioactive element is a chemical property.
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What is the numerical value for Q for this reaction? Remember to always express your answer to correct number of significant figures.
The reaction is not at equilibrium because Q >P hence the reaction moves towards the left hand side.
What is the equilibrium constant?The equilibrium constant is a figure that tells us the extent to which the reactants have been converted to products in a reaction.
Now we have the reaction; PCl3(g) + Cl2(g) ⇄ PCl5(g) hence we can write;
Q = [PCl5]/[PCl3] [Cl2]
Q = 0.39/0.21 * 0.41
Q = 4.5
The reaction is not at equilibrium because Q >P hence the reaction moves towards the left hand side.
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What is the mole fraction of sulfuric acid in a solution made by adding 34 g of sulfuric acid (H2SO4 = 98 g/mol) to 100 g of water (H2O = 18 g/mol)?
Answer:
Mole Fraction = 0.059
Explanation:
To find the mole fraction, you need to (1) convert grams H₂SO₄ and H₂O to moles (via molar mass) and then (2) calculate the mole fraction.
(Step 1)
Molar Mass (H₂SO₄): 98 g/mol
34 grams H₂SO₄ 1 mole
-------------------------- x ------------------- = 0.347 moles H₂SO₄
98 grams
Molar Mass (H₂O): 18 g/mol
100 grams H₂O 1 mole
------------------------- x -------------------- = 5.56 moles H₂O
18 grams
(Step 2)
moles solute
Mole Fraction = -------------------------------------------------
moles solute + moles solvent
0.347 moles H₂SO₄
Mole Fraction = -----------------------------------------------------------
0.347 moles H₂SO₄ + 5.56 moles H₂O
Mole Fraction = 0.059
What is oxidized in the reaction below?
H₂ + Cl₂
2HCI
Answer:
Dihydrogen
Explanation:
Dihydrogen is FORMALLY oxidized.... i.e. its oxidation number increases... And we adds the half equations together such that the electrons are eliminated
C₃H₈ (g) + 5O₂ (g) --> 3CO₂ (g) + 4H₂O (l) would be best classified as which type of reaction?
precipitation
acid-base
combustion
single displacement
URGENT
The graph shows the distribution of energy in the particles of two gas samples at different temperatures, T1 and T2. A, B, and C represent individual particles.
Based on the graph, which of the following statements is likely to be true?
Particle B is more likely to participate in the reaction than particle A.
Particle C is more likely to participate in the reaction than particle B.
Most of the gas particles have either very high or very low kinetic energies.
More gas particles participate in the reaction at T2 than at T1.
Answer:
particle C is more likely to participate in the reaction than particle B
a saline solution begins to freeze at -1.13 degrees. Express the concentration of NaCl in this solution in mass%. Kf for water is 1.86C degree/m.
The Percentage mass of NaCl is 1.78%.
What is the percent mass concentration of the NaCl in saline solution.The percent mass concentration of NaCl in the saline solution is determined from the molality of the solution.
The molality of the solution is further obtained from the freezing point depression formula.
The freezing point depression formula is given as follows:
ΔT = Kf * m * iwhere;
ΔT is the freezing point changeKf is a constantm is the molality of the solutioni is the van't Hoff factorFor the solution of NaCl;
ΔT = 0 - (-1.13) = 1.13
Kf = 1.86 °/m
i = 2
m = ΔT/(Kf * i)
m = 1.13/(1.86 * 2)
m = 0.3038 mol/kg
molar mass of NaCl = 58.5 g/mol
Mass of NaCl = 0.3038 * 58.5 = 17.8 g in
Percentage mass of NaCl = (17.8/1000) * 100
Percentage mass of NaCl = 1.78%
In conclusion, the percent mass of NaCl is obtained from the molality of the solution.
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Which sample contains the largest number of oxygen atoms? Select one: a. 8.0 g of carbon dioxide b. 8.0 g of potassium chlorate c. 8.0 g of calcium perchlorate d. 8.0 g of sodium hydroxide
The sample with the largest number of oxygen atoms will be calcium perchlorate.
Number of atoms in a compoundSince we are not looking at the number of moles, the mass of the compounds has no bearing on the number of atoms of oxygen.
The chemical formula for carbon dioxide is [tex]CO_2[/tex]. Thus, it has 2 atoms of oxygen.The chemical formula for potassium chlorate is [tex]KClO_3[/tex]. Thus, it has 3 oxygen atoms.The chemical formula for calcium perchlorate is [tex]Ca(ClO_4)_2[/tex]. Thus, it has 8 atoms of oxygen.The chemical formula for sodium hydroxide is NaOH. Thus, it has 1 atom of oxygen.Therefore, the compound with the largest number of oxygen atoms is calcium perchlorate.
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How would I write these in formula form?
The formula form of the chemical reactions are given as follows:
N₂ + 3 H₂ --> 2 NH₃2 AlBr₃ + 3 Cl₂ ---> 2 AlCl₃ + 3 Br₂HCl + NaOH --> NaCl + H₂OFe + PbSO₄ ---> FeSO₄ + Pb2 KClO₃ ---> 2 KCl + 3 O₂H₂SO₄ ---> SO₃ + H₂O2 Na₃PO₄ + 3 Ca(NO₃)₂ ---> 6 NaNO₃ + Ca₃(PO₄)₂(NH₄)₂CO₃ + MgSO₄ ---> (NH₄)₂SO₄ + MgCO₃2 N₂ + 5 O₂ ----> 2 N₂O₅What is a chemical equation?A chemical equation is an equation which uses the symbols of elements to show the reaction that occur between substances to form products.
The formula form of the chemical reactions are given as follows:
N₂ + 3 H₂ --> 2 NH₃2 AlBr₃ + 3 Cl₂ ---> 2 AlCl₃ + 3 Br₂HCl + NaOH --> NaCl + H₂OFe + PbSO₄ ---> FeSO₄ + Pb2 KClO₃ ---> 2 KCl + 3 O₂H₂SO₄ ---> SO₃ + H₂O2 Na₃PO₄ + 3 Ca(NO₃)₂ ---> 6 NaNO₃ + Ca₃(PO₄)₂(NH₄)₂CO₃ + MgSO₄ ---> (NH₄)₂SO₄ + MgCO₃2 N₂ + 5 O₂ ----> 2 N₂O₅In conclusion, the chemical reactions are represented by the equations.
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