An unknown organic compound containing carbon, hydrogen, and oxygen, is subjected to combustion analysis. When 3.498 g of the unknown compound is combusted, 7.950 g of CO2 and 3.255 g of H2O is formed. What is the molecular formula of the unknown compound if its molar mass is 174.27 g/mol?
Answers
Answer:
Molecular formula for the organic compound is: C₉H₁₈O₃
Explanation:
We determine the combustion reaction:
CₓHₓOₓ + O₂ → CO₂ + H₂O
We don't know the subscrip of the organic compound, that's why we put x.
Notice we have C in the compound and in CO₂. Let's find out the mass of C. 1 mol of CO₂ contains 1 mol of C
Then (7.950 g /44g/mol) of CO₂ may contain ?
(7.950 g /44g/mol) represents the moles of dioxide → 0.181 moles of C
These moles came from the mass of the organic compound, the 3.498 g.
So now, we can know the subscript for C.
If 3.498 g of the compound contain 0.181 moles of C
174.27 g of the compound may contain (174.27 . 0.181)/ 3.498 = 9
Let's do the same for the H.
1 mol of water contain 2 moles of H
(3.255 g /18 g/mol) of water, may contain ?
3.255 g /18 g/mol = 0.181 moles . 2 = 0.362 moles of H
These moles came from the mass of the organic compound, the 3.498 g.
Let's find out the subscript for H
If 3.498 g of the compound contain 0.362 moles of H
174.27 g of the compound may contain (174.27 . 0.362)/ 3.498 = 18
Organic compound is C₉H₁₈Oₓ. If the molar mass is 174.27 g we can easily determine the moles of O
12 g/mol . 9 + 1 g/mol . 18 + 16 g/mol . X = 174.27 g/mol
(174.27 g/mol - 12 g/mol . 9 - 1 g/mol . 18 ) / 16 = 3
Molecular formula for the organic compound is: C₉H₁₈O₃. Therefore the complete combustion reaction is:
C₉H₁₈O₃ + 12O₂ → 9CO₂ + 9H₂O
Related Questions
I need to know the electron geometry and the molecular shape
Answers
In determining the shape of a molecule, the electron geometry includes both bond pairs and lone pairs. But the molecular geometry excludes the lone pairs while determining the shape of molecule.
What is VSEPR theory?The valence shell electron pair repulsion theory is proposed by the scientists Sidgwick and Powell to predict the shapes of the molecules. This theory is based on the assumption that valence shell electron pairs repel each other and are oriented in space as far apart as possible to minimize the mutual repulsion.
Electron geometry Molecular shape
NO₂⁺ Bent Linear
PCl₃ Tetrahedral Trigonal pyramidal
BCl₂H Bent Trigonal planar
ClO₃⁻ Tetrahedral Trigonal pyramidal
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Which statement explains why germanium is a semiconductor while titanium
is a conductor?
O A. Titanium atoms have more electrons than germanium atoms.
OB. Germanium atoms have more electrons than titanium atoms.
C. Both elements allow electrons to move between atoms, but
germanium allows more movement of electrons than titanium
does.
O D. Both elements allow electrons to move between atoms, but
titanium allows more movement of electrons than germanium
does.
Answers
Answer:
B) Germanium atoms have more electrons than titanium atoms
Explanation:
Trust me I did this but for those who are hesitant
---> Conductors : It is a type of substance which conduct electricity that means it allow the electrons to flow through them.
Example of conductors are, iron, aluminium, gold, etc.
Insulators : It is a type of substance which does not conduct electricity that means it does not allow the electrons to flow through them.
Examples of insulators are, glass, rubber, ceramics, etc.
Semiconductors : It is a type of substance which conduct electricity under certain conditions that means it allow the electrons to flow through them. The conductivity level of semiconductors lie between the conductors and the insulators.
The good examples of semiconductors are silicon, germanium, gallium, and selenium.
In the given options, aluminium, gold are the metals which conduct electricity and concrete is an insulator which do not conduct electricity while the germanium is the good semiconductor.
How many moles are in 4.6x1023 molecules of H20 expressed in the correct number
of significant figures?
Answers
We know that:
One mole of any element or compound contains 6.022*10²³ atoms/molecules
where 6.022*10²³ is also known as Avogadro's number
So, Number of moles = \(\frac{Number of atoms/molecules}{Avogadro's number}\)
Number of moles in the given sample of H₂O:
From above:
Number of moles = Number of molecules / Avogadro's number
replacing the variables
Number of moles = \(\frac{4.6 * 10^{23}}{6.022*10^{23}}\)
Number of moles = \(\frac{4.6}{6.022}\)
Number of moles = 0.7639 moles
Number of Moles in correct significant Figures:
We know that the number of significant figures of the quotient is the least number of significant figures from the numbers being divided
To find the number of moles, we divided 4.6 by 6.022
Here, 4.6 has 2 significant figures and 6.022 has 4 significant figures
Hence, the quotient(number of moles) will have 2 significant figures
Number of moles in correct significant figures = 0.76 moles
how does chemical fertilizer decrease the oxygen level in water?
Answers
Answer: As the fertilizers enter the water systems, they cause an explosion of growth by algae and aquatic plants. When the organisms die they are decomposed by microbes that quickly deplete the oxygen in water, killing animals such as fish and shellfish.
Explanation: Excess fertilizers lead to "eutrophication".
What kind of intermolecular forces act between two chloramine (NH2CI) molecules?
Answers
Explanation:
brain and heart froce acts between two chloramine
Answer:
Dispersion, Hydrogen-bonding, and Dipole forces act between two chloramine (NH2CI) molecules.
Explanation:
Dispersion is exerted between all molecules. Chloramine is polar, therefore dipole forces are present. The molecular geometry of chloramine (NH2Cl) is a trigonal pyramidal, therefore hydrogen-bonding forces are present.
a 20.0mL sample of 0.15M hydrochloric acid (HCI) is needed to neutralize a 10.0mL sample of potassium hydroxide (KOH). what is the molarity of KOH solution?
Answers
Answer: .75 M
Explanation:
Why do elements not have a numerical value for standard heats of formation and Free energies of formation but do have a numerical value for standard molar entropies?
Answers
Because it takes no energy to generate a naturally occurring compound, the enthalpy of formation for an element in its elemental state will always be 0.
What do you mean by formation standard free energies?The free energy shift that happens when 1 mole of a material is created from its component elements in their standard states is referred to as the standard free energy of formation. The standard free energy of production of a pure element in its standard state is zero.
The distinction between Gibbs free energy and standard free energy is that the former is dependent on the experimental circumstances, whilst the latter describes the Gibbs free energy for reactants and products in their standard state.
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Lab: Types of Chemical Reactions
Student Guide
This laboratory allows you to study various kinds of chemical reactions, including some that result in precipitates.
Lesson Objectives
• Compare and contrast synthesis, single-displacement, and double-displacement reactions.
PREPARE
Approximate lesson time is 60 minutes.
Materials
• Lab Instructions: Lab_5.08_Instructions_modified_2020
• Lab Report: Lab_5.08_Report_modified_2020
• Lab Guidelines: Lab_Guidelines_modified
LEARN
Activity 1: Types of Chemical Reactions 1
Instructions
As you read through the lesson online, use the space below to take notes.
In this laboratory, you will study different kinds of chemical reactions.
Knowing the types of reactions helps you interpret your observations.
In a synthesis reaction, two reactants unite to form a third product.
In a single-displacement reaction, one ion of a reactant bonds with the second reactant.
In a double-displacement reaction, ions of both reactants change places.
Activity 2: Types of Chemical Reactions 1
Instructions
Procedure
1. Open the Chemical Reactions Virtual Lab.
2. Click View the Tutorial and complete the tutorial to learn how to conduct the lab.
3. Close the tutorial and click begin the Lab.
Part 1 Synthesis Reaction
4. Perform the procedure, placing the magnesium strip in the flame.
5. Record your reaction.
6. Research the chemical reaction of magnesium and oxygen gas. Write an equation for the chemical reaction
that accounts for the observed reaction in this part of the lab.
7. Answer the question: What is a synthesis reaction?
8. Answer the questions on Part 1 in the Lab Report.
Part 2 Single Displacement Reaction
9. Place 1 scoop of zinc in Vial A and add 10 drops of copper (II) sulfate. Observe the reaction.
10. Place ball of aluminum in Vial B and add 10 drops of copper (II) sulfate. Observe the reaction.
11. Place 1 scoop of zinc in Vial C and add 10 drops of silver nitrate. Observe the reaction.
12. Place copper wire in Vial D and add 10 drops of silver nitrate, wait 5 minutes. Observe the reaction.
13. Complete the ta
Answers
Answer:
hope this helps
Explanation:
see pictures try to put them in order
Why is biodiversity important to people (e.g. in terms of health, agriculture, etc.)?
Answers
Biodiversity is critical to humans because it provides a range of ecosystem services that support life and well-being.
These services include the production of food, medicine, and building materials; regulation of the climate and disease control.
The value of biodiversity to agriculture is demonstrated by the fact that a single crop can depend on hundreds of species of insects, bacteria, and fungi.
Pollination, pest control, soil formation, nutrient cycling, and water filtration are all provided by diverse ecosystems.
Biodiversity also offers several advantages to human health.
The world's pharmacopoeia is made up of a significant percentage of natural products.
This includes more than 50,000 plant-based compounds, many of which are used to create drugs.
Coral reefs and rainforests are two examples of ecosystems that house a wide range of biological diversity.
These ecosystems are also home to a wide range of microorganisms that offer new leads for pharmaceutical development.
Furthermore, biodiversity provides spiritual, cultural, and recreational benefits.
As biodiversity is increasingly threatened, these essential benefits are being lost.
Protecting biodiversity and maintaining a healthy planet is critical to safeguarding human health and well-being.
Humans must work to conserve and manage biodiversity to ensure the continuation of the ecosystem services that are essential for our survival.
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what is 1.01 km to mm in scientific notation
Answers
Answer:
= 3.456 × 1011
Explanation:
. 25.0 g piece of aluminum (which has a molar heat capacity of 24.03 J/mol°C) is heated to 86.4°C
and dropped into a calorimeter containing water (the specific heat capacity of water is 4.18 J/g°C)
initially at 21.1°C. The final temperature of the water is 26.8°C. Calculate the mass of water in
the calorimeter.
Answers
The final temperature of the water is 26.8°C. The mass of water in
the calorimeter is 55.7 g.
The specific heat capacity is given as :
Q = mcΔT
where, Q = heat
m = mass
c = specific heat capacity
ΔT = change in temperature
heat capacity = 24.03 J/mol °C / 27 g /mol = 0.89 J/ g °C
Q aluminum = 25g × 0.89 J/ g °C( 26.8 °C - 86.4 °C )
= - 1326.1 J
now, Q water = - Q Aluminum
mcΔT = - QAl
m water = -QAl / cΔT
m water = 1326.1 J / ( 4.18 J/ g °C ( 26.8 °C - 21.1 °C)
= 1326.1 g / 23.8
= 55.7 g
Thus, 25.0 g piece of aluminum (which has a molar heat capacity of 24.03 J/mol°C) is heated to 86.4°C and dropped into a calorimeter containing water (the specific heat capacity of water is 4.18 J/g°C) initially at 21.1°C. The final temperature of the water is 26.8°C. The mass of water in the calorimeter is 55.7 g.
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please help me! ASAP
Answers
Answer:
(1) 4- ethyl -6 methyl -2 octyne
What units would be used in measuring temperature
Answers
Answer: The most common ones ;
CelsiusKelvinFahrenheitExplanation:
The picture shows two cars moving at the same speed. Which car has more kinetic energy?
Answers
Answer:
car 2/red
Explanation:
give me crown
WILL GIVE BRAINLIEST
Choose the answer that best describes strong currents of warm, moist air rapidly rising to altitudes of 40,000 feet causing heavy rain, lightening, hail, winds, and flash flooding.
A. tornado
B. cyclone
C. thunderstorm
D. temperature inversion
What problems can temperature inversions create?
A. can create dust storms making air hard to breath
B. can cause cyclones to form
C. can cause hail, rain and high winds
D. can trap polluted air causing health problems
What are rotating air currents circulating around a vertical axis inside a supercell?
A. downdrafts
B. tornado
C. mesocyclone
D. windshear
What is a cyclone called that generates winds of 200 kmph and rotates in a counter-clockwise movement in the Pacific Ocean?
A. a typhoon in the northern hemisphere
B. a cyclone
C. a hurricane
D. a typhoon in the southern hemisphere
Answers
Answer:
1. C. thunderstorm
2. D. can trap polluted air causing health problems
3. C. mesocyclone
4. B. a cyclone
Explanation:
A temperature inversion happens as a result of warm air developing over a layer of cooler air.
A thunderstorm is a violent weather with strong winds, lightning, thunder, heavy rain fall and dense clouds. This occurs when warm air rise in an updraft to cooler atmosphere.
Answer:
1. Thunderstorm
2.can trap polluted air causing health problems
3.mesocyclone
4.typhoon in the northern hemisphere
Explanation:
The partial pressure of oxygen was observed To be 156 torr
Answers
When the partial pressure of oxygen is 156 torr and the atmospheric pressure is 743 torr, the mole fraction of oxygen is 0.210.
What is partial pressure?Partial pressure is the pressure exerted by an individual gas in a mixture of gases. The partial pressure of a gas depends on its mole fraction.
The relationship between the partial pressure of a gas and the total pressure is given by Dalton's law, which states that the sum of the partial pressures is equal to the total pressure.
We can calculate the partial pressure of oxygen using the mathematical expression of Dalton's law:
pO₂ = P × X(O₂)
X(O₂) = pO₂ / P
X(O₂) = 156 torr / 743 torr = 0.210
where,
pO₂ is the partial pressure of oxygen.P is the total pressure of the mixture.X(O₂) is the mole fraction of oxygen.The mole fraction of oxygen is 0.210 when its partial pressure is 156 torr and the atmospheric pressure is 743 torr.
The complete question is:
The partial pressure of oxygen was observed To be 156 torr in air with a total atmospheric pressure of 743 torr. Calculate the mole fraction of oxygen present.
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Periodic trends answer key chemistry 10th grade
Answers
Trends in modern periodic table are:
variation of valency, atomic size , metallic properties and electronegativity
Valency - number of valence electrons . Elements of each group have same number of valence electrons. So, they have the same valency.
Atomic size- It is distance from the centre of the nucleus to the valence shell of the atom.
Along the period – Atomic radius decreases as effective nuclear charge increases . It pulls valence electrons closer to the nucleusDown the group – Atomic radius increases because new shells are added , thus the distance between nucleus and valence electrons increases.Metallic properties -
Along the period – Metallic character decreases because tendency to lose valence electrons decreases due to the increasing nuclear charge.Down the group – As the distance between nucleus and outermost electron increases, nuclear pull decreases. This increases the tendency of an atom to lose valence electrons, thus metallic character increases.Electronegativity-
Along the period – Electronegativity increases as the tendency to gain electrons in valence shell increases due to increasing nuclear charge. Down the group – Since distance between the nucleus and valence shell increases, nuclear pull decreases. This decreases tendency of atom to gain an electron, thus electronegativity decreases.So we can conclude that periodic trends are specific patterns which are present in the periodic table, that illustrate different aspects of a certain element
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N⁻³ and Na⁺ have same
A Atomic no.
B Mass No.
C No. of electrons
D No. of neutrons
Answers
Answer:
C.) No. of electrons
Explanation:
A.) is incorrect. The atomic number represents the number of protons in an element. Nitrogen (N) and sodium (Na) always have a differing amount of protons.
B.) is incorrect. The mass number represents the number of protons and neutrons in an element. The number of neutrons and protons are specific to each element (disregarding isotopes). When elements ionize, these amounts are not altered.
C.) is correct. When an element becomes an ion, the number of electrons change. When nitrogen gains 3 electrons and sodium loses 1 electron, they end up having the same number of electrons (10).
D.) is incorrect. When elements ionize, the number of neutrons does not change. The only way two different elements could have the same number of neutrons is if at least one of the elements is an isotope. Isotopes are two or more atoms of the same element that differ in their amounts of neutrons.
A graduated cylinder contains 50.0 ml of water. A 23.5 g piece of unknown metal is carefully dropped into the cylinder. When
the metal is completely covered with water, the water rises to the 53.4 ml mark. What is the density of the unknown piece of
metal in g/ml?
Answers
To find the density of the unknown piece of metal, we can use the formula:
Density = mass / volume.
How to find the density ?The volume of the metal can be calculated by deducting the starting water volume (50.0 ml) from the final water volume (53.4 ml) after the metal is introduced. We know the mass of the unknown metal is 23.5 g.Volume of metal = 53.4 ml - 50.0 ml = 3.4 ml.Now we can substitute the values into the density formula: Density = 23.5 g / 3.4 ml = 6.9 g/ml.Therefore, the density of the unknown piece of metal is 6.9 g/ml.To know more about density , check out :
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Why is honesty important?
Answers
Honesty leads to a fulfilling, free life. Honesty is not just about telling the truth. It's about being real with yourself and others about who you are, what you want and what you need to live your most authentic life. ... Honesty sharpens our perception and allows us to observe everything around us with clarity.
(brainliest plz)
burning 12g of urea raise temp of water by 30C what is the enthalpy of combustion for 1kg urea
Answers
The enthalpy of combustion for 1kg of urea is -1223525.84 J/mol.
Urea is a compound that is used in fertilizers and in some plastics.The enthalpy of combustion for urea is the amount of energy that is released when urea is burned. In order to calculate the enthalpy of combustion for 1kg of urea, we need to use the information that is provided to us in the question. Let us start by writing down the balanced equation for the combustion of urea: CO(NH2)2 + 3/2 O2 → CO2 + 2H2O + N2
The balanced equation shows that 1 mole of urea reacts with 1.5 moles of oxygen gas to produce 1 mole of carbon dioxide, 2 moles of water, and 1 mole of nitrogen gas. The enthalpy change for this reaction is equal to the amount of energy that is released when 1 mole of urea is burned.
The heat of combustion (ΔHc) of urea is -632.6 kJ/mol. This means that 632.6 kJ of energy is released when 1 mole of urea is burned. We know that 12g of urea raised the temperature of water by 30°C. We can use this information to calculate the amount of energy that was released when 12g of urea was burned.
The specific heat capacity of water is 4.18 J/g°C. This means that it takes 4.18 J of energy to raise the temperature of 1 gram of water by 1°C. Therefore, it takes 4.18 x 1000 = 4180 J of energy to raise the temperature of 1 kg of water by 1°C.
We know that 12g of urea raised the temperature of water by 30°C. Therefore, the amount of energy that was released when 12g of urea was burned is:
Energy = mass x specific heat capacity x temperature change
Energy = 0.012 kg x 4180 J/kg°C x 30°C
Energy = 1497.6 J
We can now use this information to calculate the enthalpy of combustion for 1kg of urea:
Enthalpy of combustion = energy released / moles of urea burned
Enthalpy of combustion = 1497.6 J / (0.012 kg / 60.06 g/mol)
Enthalpy of combustion = - 1223525.84 J/mol
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Which of the following is an acceptable IUPAC name for the compound below? CHO Br CI A) o-bromo-m-chlorobenzaldehyde B) 6-bromo-3-chlorobenzaldehyde C) 2-bromo-5-chlorobenzaldehydeD) 1-bromo-4-chlorobenzaldehyde
Answers
Among the following, an acceptable IUPAC name for the compound is (C) 2-bromo-5-chlorobenzaldehyde.
The IUPAC nomenclature for substituted aromatic compounds requires that the name of the substituent be added as a prefix to the name of the aromatic compound. Nitrobenzene is the term given to the compound that results when a benzene ring is joined to a single nitro group, while chlorobenzene is the term given to the compound that results when chlorine is attached to the benzene ring.
First, give numbering to the benzene ring,numbering starts from the -CHO group attached carbon.Br is a better priority than Cl so the IUPAC name will be:2-bromo-5-chlorobenzaldehyde
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what is a jump start that can speed up the decomposition reaction in soda
Answers
Answer:
you have to shake the soda up
2.
Which mixture could be a useful buffer in a solution?
acetic acid (CH3CO2H) and hydrochloric acid (HCl)
sodium hydroxide (NaOH) and elemental sodium (Na)
ammonia (NH3) and ammonium chloride (NH4Cl)
acetic acid (CH3CO2H) and ammonia (NH3)
Pls answer quickly
Answers
Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C
A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.
In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.
Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.
Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.
Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).
The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.
Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.
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Why do carbon, silicon, and germanium share many chemical properties?
o They have the same atomic mass.
o They have the same atomic number.
o They have the same ratio of electrons to protons.
o They have the same electron configuration.
Answers
Answer:
Carbon, silicon, and germanium share many chemical properties because they belong to the same group in the periodic table, which is group 14 (also known as the carbon group). The elements in this group have the same number of valence electrons (4), which gives them similar chemical properties.
The correct option is: They have the same number of valence electrons (4), which gives them similar chemical properties.
Explanation:
1. When reactants react to form products, it’s technically called the ____________________________________. But sometimes, there’s an opposite reaction that occurs with the products changing back into the reactants; we call this a ___________________________________.
Answers
A reaction in which reactants react to form products is called forward reaction. In some reactions, products would change back into reactants which is called backward reaction.
In forward reaction, the reactants react with each other and forms product as a result. The reaction occurs from left to right in an equation.
In backward reaction, the products that was formed would revert back to form reactants due to surrounding conditions. The reaction occurs from right to left in an equation.
The type of reaction where both forward and backward reaction takes place is called reversible reaction. When the rate of the reaction between forward and backward reaction becomes equal, it reaches a state of equilibrium.
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Which DNA strand matches the strand AATGACT?
TTACTGA
GGCAGTC
CCATCAG
AACGATC
Answers
AACGATC matches the strand AATGACT because it is the reverse complement of AATGACT.
In DNA, the nucleotides Adenine (A) always pairs with Thymine (T), and Cytosine (C) always pairs with Guanine (G) in the double helix structure.
By taking the reverse of a given DNA sequence and then replacing each base with its complement, you get the reverse complement of the original sequence.
So, in this case, AATGACT is the original sequence, by replacing A with T, T with A, G with C, and C with G we get the reverse complement of the sequence AACGATC.
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Answer: It is AACGATC
What is the mass of 1.78 moles of O2
Answers
Answer:
56.96 grams
Explanation:
To find the mass of 1.78 moles of O2, we need to use the molar mass of O2, which is the mass of one mole of O2.
The chemical formula for O2 is O-O or simply O2. The molar mass of O2 is the sum of the atomic masses of two oxygen atoms, which can be found on the periodic table.
The atomic mass of oxygen (O) is approximately 16.00 g/mol. So the molar mass of O2 is:
Molar mass of O2 = 2 x atomic mass of O
= 2 x 16.00 g/mol
= 32.00 g/mol
Therefore, the mass of 1.78 moles of O2 is:
Mass = number of moles × molar mass
= 1.78 mol × 32.00 g/mol
= 56.96 g
So the mass of 1.78 moles of O2 is 56.96 grams.
When zinc reacts with copper sulfate solution, zinc sulfate solution and copper are formed.(i) An experiment was carried out to measure the temperature change when zinc powder reactswith copper sulfate solution.initial temperature of copper sulfate solution = 20 °Cfinal temperature of mixture after the reaction = 46 °CExplain what the temperature readings show about the type of heat change that occurs duringthis reaction.
Answers
The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.
In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.
The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.
During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.
The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.
The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.
In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.
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An allele is a form of a gene? true or false
Answers
Answer:
true
Explanation: