Answer: Carbon dioxiode+water+sunlight=glucose+oxygen
6CO2 + 6H2O + sunlight —> C6H12O6 + 6O2
Explanation:
How many manganese atoms are in each formula unit of potassium permanganate?
True/False: All entropies of fusion are negative.
True - fusion leads to less microstates (degrees of freedom).
False - fusion leads to more microstates (degrees of freedom).
False - fusion leads to less microstates (degrees of freedom).
True - fusion leads to more microstates (degrees of freedom).
The statement All entropies of fusion are negative is Fasle.
This is because - fusion leads to more microstates (degrees of freedom).
Hence, option B is correct.
What is entropy?Entropy is a measure of the degree of randomness of a body.
The higher the randomness of a substance, the higher the entropy of the substance, and vice versa.
Hence, any process that results in an increase in the randomness of the particles of a substance results in an increase in the entropy of that substance.
Thus, the process of change of state where the substance changes from a more ordered state to a less ordered state has a positive value for entropy change.
The processes of change of state that increases the value of the entropy of a substance are
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1. how common are the elements that living systems are made out of? 2. explain the relationship between matter and energy. 3. why do atoms bond? 4. what is the cause of molecular polarity?
1. Living systems require a subset of elements found in the universe, with carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur being essential.
2. Matter serves as the building blocks, while energy drives the processes within living organisms.
3. Atoms form chemical bonds to become stable, including covalent, ionic, and hydrogen bonds.
4. Molecular polarity arises from the unequal sharing of electrons due to differences in electronegativity between atoms.
1. The elements that living systems are made out of are relatively common in the universe. There are 118 known elements, but only about 25 of them are essential for life. These elements include carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur, among others. While these elements are abundant in the Earth's crust and atmosphere, their concentrations may vary in different environments.
2. Matter and energy are closely related. Matter refers to anything that has mass and occupies space, while energy is the ability to do work or cause change. In living systems, matter serves as the building blocks for various biological structures, such as cells and tissues. Energy is required to drive the chemical reactions and processes that occur within living organisms. The energy needed by living systems is often derived from the breakdown of organic molecules, such as glucose, through processes like cellular respiration.
3. Atoms bond to become more stable. Atoms are composed of a positively charged nucleus surrounded by negatively charged electrons. In order to achieve a stable configuration, atoms may gain, lose, or share electrons with other atoms. This results in the formation of chemical bonds. There are different types of bonds, including covalent bonds, ionic bonds, and hydrogen bonds. Covalent bonds involve the sharing of electrons, while ionic bonds involve the transfer of electrons. Hydrogen bonds are weaker and occur when a hydrogen atom is attracted to an electronegative atom.
4. The cause of molecular polarity is the unequal sharing of electrons between atoms. In a molecule, if the electrons are shared equally, the molecule is nonpolar. However, if the electrons are not shared equally, the molecule becomes polar. This occurs when there is a difference in electronegativity between the atoms involved in the bond. Electronegativity is the ability of an atom to attract electrons towards itself. When there is a greater electronegativity difference, the more electronegative atom will attract the electrons more strongly, resulting in a polar molecule.
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(42.7g +0.259g) / (28.444mL x 12.367)
In a 1.0×10−6 M solution of KOH(aq) at 25 °C, arrange the species by their relative molar amounts in solution.
Answer:
H2O(the most), OH^-, K^+, H3O^+, KOH(the least)
Explanation:
In a solution, the solvent molecules account for the highest amount of chemical species present. The solvent molecules are often present in large excess. Since water is the solvent for KOH, water molecules are the most abundant chemical species present.
The ions; OH^-, K^+, H3O^+ are present in the order depicted in the answer above. KOH is the least abundant specie because KOH is ionic and will be split into its constituent ions in water. There will be little or no KOH specie present in the solution.
Study of the Equilibrium: Fe3+(aq) + SCN–
(aq) ⇌ [FeSCN]
2+(aq)
pale yellow redWhich reagent(s) did you use to enhance the formation of [FeSCN] 2+(aq)? Why?
To improve the formation of [FeSCN]2+(aq), we can add either Fe3+(aq) or SCN–(aq) to the reaction. The development of the product [FeSCN]2+(aq) can be monitored by its color, which changes from a pale yellow to red.
What is chemical equilibrium?The state of a reversible reaction when the rates of the forward and reverse reactions are equal is known as chemical equilibrium. It's described as the point at which the concentration of a reaction mixture remains constant with time. The speed of the forward reaction is equal to the speed of the reverse reaction at this point. The reaction is dynamic in that the forward and reverse reactions continue to occur even when equilibrium is established. The concentration of reactants and goods will, however, remain constant.
What is Le Chatelier's principle?Le Chatelier's principle is a concept used to predict the impact of a change in a chemical equilibrium system. According to this theory, if a stress is put on a system at equilibrium, the system reacts in such a way as to counteract the stress and reestablish equilibrium. For example, if a stress is put on a reaction by altering the concentration of one of the components, the reaction will adjust in the opposite direction to compensate for the change and reestablish equilibrium.
How is the equilibrium affected by adding reagents to the reaction?When we add more reagents to a reaction, we can change the concentration of reactants and goods, which has an impact on the equilibrium. A system in equilibrium is subjected to a disturbance when a component is introduced into it. The reaction will be driven in the direction that minimizes the disturbance. For example, if more Fe3+(aq) is added, the reaction will shift to the right, forming more [FeSCN]2+(aq), resulting in a deeper red color.
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A reaction has a standard free-energy change of -13.50 KJ mol-1 (-3.227 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 degree Celsius
________________?
The equilibrium constant for the reaction at 25 degrees Celsius is approximately 236.8. The value of the equilibrium constant depends on the temperature at which the reaction is taking place.
The relationship between the standard free energy change (ΔG°), the equilibrium constant (K), and the temperature (T) is given by the following equation:
ΔG° = -RTlnK
where R is the gas constant (8.314 J/(mol K) or 1.987 cal/(mol K)) and ln is the natural logarithm.
First, we need to convert the standard free energy change from kilojoules per mole to joules per mole:
ΔG° = -13.50 kJ/mol = -13,500 J/mol
Next, we can substitute the values into the equation and solve for K:
-ΔG°/RT = lnK
-K = e^(-ΔG°/RT)
-K = e^(-(−13,500 J/mol) / (8.314 J/(mol K) × 298 K))
-K = e⁵.⁴⁶
-K = 236.8
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What effects do mutations have? Check all that apply.
Answer:
A,C,E,F
Explanation:
What is a biotic factor, and a an abiotic factor
Explanation:
biotic factors are the things which have life like animals and plants
And Abiotic factors are the things which don't have life like air,stone and river
Answer:
A biotic factor is anything living like a bee or a cat or dog .
A Abiotic factor is anything not living like a rock or tree.
Explanation:
biotic means living or alive
Abiotic means not living
the ph of a 1.25 x 10 - 3 m naoh solution is select one: a. 11.10 b. 7.00 c. 2.90 d. 3.10
The pH of a 1.25 x 10^-3 M NaOH solution is approximately 9.81. The given options do not include the correct answer for the pH of a 1.25 x 10^-3 M NaOH solution.
A pH scale is used to calculate how acidic or basic a solution is.
In this question, we are given the molarity of a sodium hydroxide (NaOH) solution and we need to calculate its pH.
The formula for calculating pH is:
pH = -log[H+],
In the context of the pH calculation, [H+] represents the molar concentration of hydrogen ions present in the solution.
For a basic solution like NaOH, we can use the formula:
[OH-] = Kw / [H+],
where Kw is the ionization constant for water, which is 1 x 10^-14 at 25°C.
We can then use the relationship [OH-] x [H+] = Kw to calculate [H+] and then use the pH formula to calculate pH.
Molarity of NaOH solution = 1.25 x 10^-3 M
First, we need to calculate the hydroxide ion concentration ([OH-]) using the formula:
[OH-] = Kw / [H+]
[OH-] = 1 x 10^-14 / (1.25 x 10^-3)
[OH-] = 8 x 10^-12 M
Next, we can use the relationship [OH-] x [H+] = Kw to calculate [H+]:
8 x 10^-12 x [H+] = 1 x 10^-14
[H+] = 1.25 x 10^-3 M / 8 x 10^-12
[H+] = 1.56 x 10^-10 M
Now that we have the hydrogen ion concentration, we can use the pH formula to calculate pH:
pH = -log[H+]
pH = -log(1.56 x 10^-10)
pH = 9.81
Therefore, the pH of a 1.25 x 10^-3 M NaOH solution is approximately 9.81. The given options do not include the correct answer for the pH of a 1.25 x 10^-3 M NaOH solution.
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Which of the following is NOT how compounds are formed?
Group of answer choices
Atoms give away electrons to other atoms
Atoms accept electrons from other atoms
Atoms share electrons with other atoms
Bohr Model of Hydrogen
When a sodium atom reacts with a chlorine atom to
form a compound, the electron configurations of the
ions forming the compound are the same as those in
which noble gas atoms?
1) krypton and neon
3) neon and helium
2) krypton and argon
4) neon and argon
Answer:
4) Neon and Argon
Explanation:
Sodium has 11 electrons, Chlorine has 17.
For both of them to complete their shells Sodium will give one electron to chlorine.
Sodium will become 2,8 in the reaction.
Chlorine will become 2,8,8 in the reaction.
2,8 is the electron configuration of Neon.
2,8,8 is the electron configuration of Argon
Which takes place when a chemical change
occurs?
A. Bonds connecting atoms in products and
reactants form.
B. Bonds connecting atoms in products and
reactants break.
C. Bonds connecting atoms in reactants break
and bonds connecting atoms in products
form.
D. Bonds connecting atoms in reactants form
and bonds connecting atoms in products
break.
Answer:
C. Bonds connecting atoms in reactants break and bonds connecting atoms in products form.
The formula of the compound that forms with Cu 2+ combines with bromine ions is :
Answer:
The formula of the compound that forms when Cu2+ combines with bromine ions is CuBr2
Explanation:
The copper ion has a charge of +2, and the bromine ion has a charge of -1.
In order to balance the charges, we need two bromine ions for every copper ion. So the formula is CuBr2.
This compound is also known as copper(II) bromide. It is a white solid that is soluble in water. It is used in a variety of applications, including photography, medicine, and manufacturing.
Rank the following elements that make up the majority of Earth’s crust according to increasing ionization energy. a. Mg b. Ca c. Sid. O
The ionization energy of the elements that make up the majority of Earth's crust, ranked in increasing order, is:
d. Oxygen (O)
c. Silicon (Si)
a. Magnesium (Mg)
b. Calcium (Ca)
Ionization energy refers to the amount of energy required to remove an electron from an atom. The higher the ionization energy, the more energy is required to remove an electron, and the more difficult it is to form a positive ion.
In general, ionization energy increases across a period (left to right) as the atomic number increases and the electrons are held more tightly by the positively charged nucleus. Within a group (vertical column), ionization energy decreases as the number of electrons in the valence shell increases, leading to a larger and more diffuse electron cloud.
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HELP FAST!!!!!!!
Which two groups have the same functional group?
O A. Amines and alcohols
B. Aldehydes and esters
C. Ketones and aldehydes
D. Esters and ethers
Answer:
ketones and aldehydes
Explanation:
just took it!
Assume that for your second trial, you ended up finding that 167 J were gained by the calorimeter and 1280 J were gained by the water. Given these findings, what was the change in energy (in Joules) of the metal
Change in energy of the metal was -1447 Joules. Negative indicating loss of energy.
To find the change in energy of the metal, we need to use the principle of conservation of energy. We know that the heat gained by the metal is equal to the heat lost by the water and the calorimeter. So, we can set up an equation as follows:
Heat gained by metal = Heat lost by water + Heat lost by calorimeter
Let's call the change in energy of the metal "Q". We know that the heat gained by the calorimeter was 167 J, and the heat gained by the water was 1280 J. Therefore, the heat lost by both the water and the calorimeter was:
Heat lost by water + Heat lost by calorimeter = 167 J + 1280 J = 1447 J
Now we can set up our equation:
Q = -1447 J
The negative sign indicates that the metal lost energy. Therefore, the change in energy of the metal was -1447 Joules.
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An exergonic reaction __________ free energy, and an endergonic reaction __________ free energy.
What is the value for AG at 300 K if AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?
O
A. AG = 54 kJ/mol
O
B. AG=-18 kJ/mol
O
C. AG= 0 kJ/mol
O
D. AG = 27 kJ/mol
Answer:
0 kJ/mol
Explanation:
Step 1: Given data
Enthalpy change (ΔH): 27 kJ/molEntropy change (ΔS): 0.09 kJ/mol.KAbsolute temperature (T): 300 KStep 2: Calculate the Gibbs free energy change (ΔG)
We can calculate the Gibbs free energy change using the following expression.
ΔG = ΔH - T × ΔS
ΔG = 27 kJ/mol - 300 K × 0.09 kJ/mol.K = 0 kJ/mol
Since ΔG = 0 kJ/mol, the process in not spontaneous nor non-spontaneous.
Give the number of protons and the number of neutrons in the nucleus of the following isotopes: a) Carbon-14 b) Cobalt-60 c) Gold-197 d) Uranium-235
Explanation:
We are given different isotopes and we have to identify the number of protons and neutrons that are in the nuclueus of each atom.
a) Carbon-14:
By definition two isotopes are atoms that have the same atomic number but different mass number. The atomic number of an atom is equal to the number of protons of that atom, and the mass number is equal to the number of protons plus the number of neutrons.
atomic number = n° of protons
mass number = n° of protons + n° of neutrons
n° of protons = atomic number
n° of neutrons = mass number - n° of protons
n° of neutrons = mass number - atomic number
If two isotopes have the same atomic number but different mass number we can say that two isotopes have the same number of protons but different number of neutrons.
In we pay attention to carbon-14 we can look for its atomic number in the period table: 6. And its mass number is the one that we are given after the name of the element: 14.
n° of protons = atomic number = 6
n° of protons = 6
n° of neutrons = mass number - atomic number = 14 - 6
n° of neutrons = 8
b) Cobalt-60:
atomic number = 27 (from the periodic table)
mass number = 60
n° of protons = atomic number = 27
n° of protons = 27
n° of neutrons = mass number - atomic number = 60 - 27
n° of neutrons = 33
c) Gold-197:
atomic number = 79 (from the periodic table)
mass number = 197
n° of protons = atomic number = 79
n° of protons = 79
n° of neutrons = mass number - atomic number = 197 - 79
n° of neutrons = 118
d) Uranium-235:
atomic number = 92 (from the periodic table)
mass number = 235
n° of protons = atomic number = 92
n° of protons = 92
n° of neutrons = mass number - atomic number = 235 - 92
n° of neutrons = 143
Answer:
a) Carbon-14: n° of protons = 6 n° of neutrons = 8
b) Cobalt-60: n° of protons = 27 n° of neutrons = 33
c) Gold-197: n° of protons = 79 n° of neutrons = 118
d) Uranium-235: n° of protons = 92 n° of neutrons = 143
how long will it take for the 1.35 mgmg sample of pu-236pu-236 to decay to 0.100 mgmg ? (plutonium-236 is an alpha emitter with a half-life of 2.86 years.)
The 1.35 mg sample of plutonium-236 (Pu-236) will take approximately 38.61 years to decay to 0.100 mg, based on its half-life of 2.86 years.
To calculate the time it will take for the 1.35 mg sample of plutonium-236 (Pu-236) to decay to 0.100 mg, we can use the concept of half-life.
First, we need to determine the number of half-lives required for the decay. We can do this by dividing the initial amount of Pu-236 (1.35 mg) by the amount it decays each half-life (0.100 mg).
1.35 mg / 0.100 mg = 13.5 half-lives
Since the half-life of Pu-236 is 2.86 years, we can calculate the total time it will take by multiplying the number of half-lives by the half-life duration:
13.5 half-lives * 2.86 years = 38.61 years
Therefore, it will take approximately 38.61 years for the 1.35 mg sample of Pu-236 to decay to 0.100 mg.
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How many isomers are there in C7H16 ?
a. 6
b. 7
c. 8
d. 9
What property do metals exhibit as a result of having delocalized valence electrons?
A. brittleness
B. flammability
C. low melting points
D. electrical conductivity
Electrical conductivity is the property of metals is as a result of having delocalized valence electrons. The correct option to this question is D.
DefinitionMetallic bonding explains several features of metals by describing how electrons are delocalized around positively charged nuclei.Due to the electron sea's unrestricted movement and ability to carry charge, the majority of metals make excellent electrical conductors. Electrons may move freely, which is why they conduct electricity in molten ionic compounds, aqueous ionic compounds, and conductive nonmetals like graphite.Conductivity. The rate at which heat or an electric charge can travel through a material is measured by its conductivity. A substance that presents extremely minimal resistance to the transfer of thermal or electric energy is referred to as a conductor. The three types of materials are insulators, semiconductors, and metals.For more information on electrical conductivity kindly visit to
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Which of the following molecules would have the highest boiling point?
a) hexane
b) octane
c) 2-propylpentane
d) 2-methylhexane
The molecule which would have the highest boiling point is 2-methylhexane. Thus, the correct option will be D.
What is boiling point?The boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure. The boiling point of a liquid is a measure of its vapor pressure. The higher the boiling point, the higher the vapor pressure of the liquid, and the more heat is required to vaporize it.
The boiling point of a substance is affected by the strength and types of intermolecular forces. The stronger the intermolecular forces, the higher the boiling point. 2-methylhexane has highest boiling point because it has the highest number of carbons and branches, which contribute to its strong intermolecular forces that lead to a higher boiling point.
Therefore, the correct option is D.
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calculate the volume of concentrated sulfuric acid needed to 5.00 l of 10.0 m sulfuric acid. concentrated sulfuric acid has a molarity of 18.0 m and a density of 1.83 g/cm3 .
This yields a mass of 16.47 g of concentrated sulfuric acid.
What is sulfuric acid?Sulfuric acid, also known as oil of vitriol, is a strong mineral acid with the molecular formula H2SO4.
Volume of concentrated sulfuric acid needed = 5.00 L x (18.0 m / 10.0 m)
= 9.00 L
Mass of concentrated sulfuric acid needed = 9.00 L x 1.83 g/cm3
= 16.47 g
The volume of concentrated sulfuric acid needed to make 5.00 L of 10.0 m sulfuric acid can be calculated by multiplying the volume of the solution (5.00 L) by the molarity of the concentrated sulfuric acid (18.0 m) divided by the desired molarity of the solution (10.0 m). This yields a volume of 9.00 L of concentrated sulfuric acid. The mass of concentrated sulfuric acid needed can then be calculated by multiplying the volume of concentrated sulfuric acid (9.00 L) by the density of sulfuric acid (1.83 g/cm3). This yields a mass of 16.47 g of concentrated sulfuric acid.
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The ____number can vary among atoms of the same element.
Answer:
Mass number
Explanation:
All atoms of the same element have the same number of protons, but some may have different numbers of neutrons, which would cause a different mass number
Answer:
The answer is mass number
notice that nitrogen is less abundant than either carbon or oxygen. this is an example of the more general observation that
Notice that nitrogen is less abundant than either carbon or oxygen. this is an example of the more general observation that the abundances of these three elements follow a general pattern in which even-numbered elements are more common than the odd-numbered elements.
Natural abundance refers to the abundance of isotopes of a chemical element that are naturally found on a planet. The relative atomic mass a weighted average, weighted by mole-fraction abundance figures of these isotopes is the atomic weight listed for the element in the periodic table.
Elements with even atomic numbers are more abundant than the elements with odd atomic numbers that come between them. Carbon is atomic number 6, nitrogen is atomic number 7, and oxygen is atomic number 8. The abundances of these three elements follow a general pattern in which even-numbered elements are more common than the odd-numbered elements that come between them.
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Would you recommend storing nuclear waste near natural resources? Explain why or why not.
Answer:
No
Explanation
I say no because that could possibly put many species of animals i danger of nuclear reaction. Not only would it put many animals in danger it would put humans plant and most likely make that area a toxic waste for years
Answer:
No
Explanation:
Is oxygen and potassium an ionic bond?