Calculate the percent change in the average concentration of flavonoids in apples grown with the reflective ground cover compared with the apples grown with the grass ground cover.
Answers
We have to calculate the percent change in the average concentration of flavonoids in apples grown with the reflective ground cover compared with the apples grown with the grass ground cover.
For calculating, we need information. First we need the average concentration of flavonoids in apples grown with the reflective ground cover. Secondly we need the average concentration of flavonoids in apples grown with the grass ground cover.
We can use the formula to calculate the percent change.
Percent Change = [(New Value - Old Value) / Old Value] x 100
New Value ⇒ average concentration of flavonoids in apples grown with the reflective ground cover.
Old Value ⇒ average concentration of flavonoids in apples grown with the grass ground cover.
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Related Questions
Complete combustion of a 0.350 g sample of a compound in a bomb calorimeter releases 14.0 kJ of heat. The bomb calorimeter has a mass of 1.20 kg and a specific heat of 3.55 J/(gi°C).
If the initial temperature of the calorimeter is 22.5°C, what is its final temperature?
Use q equals m C subscript p Delta T..
19.2°C
25.8°C
34.2°C
72.3°C
Answers
The compounds in a calorimeter releases 14.0 kJ of heat, but the heat it also generates will be equivalent to the heat the calorimeter gains.
Mass, specific heat, and temperature change are all components of heat energy.
Thus, 14000 J equals 1200 g times 3.55 (x-22.5) 14000 equals 4260 (x-22.5) x-22.5 equals 3.286 x, which equals 25.786 25.9
This means that the final temp is 25.8 °C.
What is the purpose of a calorimeter?The volume & heat is produced during a specific time period are measured using calorimeters. The flow is then routed through a tank that contains some water that has been pre-weighed and thermally characterized.
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If I have 2.9 L of gas at a pressure of 5.0 atm and a temperature of 50.0 °C, what will be the temperature of the gas if I decrease the volume of the gas to 2.4 decrease the pressure to 3.0 atm?
Answers
According to the ideal gas law, the relationship between the pressure, volume, and temperature of a gas is given by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature of the gas in Kelvin.
If we have 2.9 L of gas at a pressure of 5.0 atm and a temperature of 50.0 °C, we can calculate the temperature of the gas if we decrease the volume of the gas to 2.4 and decrease the pressure to 3.0 atm by rearranging the ideal gas law equation as follows:
T = (PV) / (nR)
In this equation, T represents the temperature of the gas, P represents the pressure of the gas, V represents the volume of the gas, n represents the number of moles of gas, and R represents the ideal gas constant.
Plugging in the values from the problem into the equation, we get:
T = (5.0 atm * 2.9 L) / (n * 0.08206 L*atm / mol*K)
T = (14.5 L*atm) / (n * 0.08206 L*atm / mol*K)
T = (14.5 L*atm) / (n * 0.08206 L*atm / mol*K)
T = 177.2 K
Therefore, if we have 2.9 L of gas at a pressure of 5.0 atm and a temperature of 50.0 °C, and we decrease the volume of the gas to 2.4 and decrease the pressure to 3.0 atm, the temperature of the gas will be 177.2 K.
Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono_____________________ b-) O número de átomos de hidrogênio __________________ c-) O número de átomos de oxigênio ___________________ d-) Quantos átomos teremos ao todo se tivermos 8 moléculas dessa substância? _______ e-) Quantos átomos teremos de cada elemento com 20 moléculas de glicose
Answers
Answer:
Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono = 6 b-) O número de átomos de hidrogênio = 12 c-) O número de átomos de oxigênio = 6d-) Quantos átomos teremos quando descubro se temos 8 moléculas dessa substância?
48 oxigênio, 48 carbono e 96 hidrogênio e-) Quantos átomos de cada elemento teremos com 20 moléculas de glicose?
160 de oxigênio e carbono e 240 de hidrogênio.
Explanation:
A glicose é uma das moléculas mais usadas no organismo humano, pois é uma molécula em que sua decomposição é muito mais fácil que os aminoácidos, portanto, eles produzem como produto a moeda de energia que é ATP mais facilmente do que outros alimentos .
A glicose não é encontrada apenas em alimentos açucarados, isso é um mito, na verdade é a unidade de carboidratos (de assados a doces)
Identify indicators of a chemical reaction. Check all of the boxes that apply.
Two clear liquids are combined. A green solid forms.
color change
absorption of heat
formation of precipitate
formation of gas
Blobs of green solid are shown in clear liquid in a test tube.
Answers
Answer:color change and formation of precipitate.
Explanation: The reaction of products of the chemical reaction may have different properties
Suppose the interaction between two atoms by the Lennard-Jones potential: ULJ = B/r^12 - A / r^6 where the values of A and B are known to be A = 10^-77 J x m^6 and B = 10^-134 J x m^12.
What does the Lennard-Jones potential predict for the separation r=r eq
hen the energy is at the minimum (equilibrium) value, U min. What is the u min fot this interaction at T=298 K ? What is the ratio of U min to the purely attractive van der Waals component of the interaction potential at r eq.
What is the ratio of r eq to r 0 defined by u(r 0 )=0. 4. What is the ratio of r s to r 0 , where r s is the separation where the magnitude of the (attractive adhesion) force is maximum, F max . What is the value for F max between the two atoms?
Answers
a) The Lennard-Jones potential predicts the separation r_eq at the minimum energy U_min.
b) The U_min for this interaction at T=298 K is the value obtained from the Lennard-Jones potential equation when r=r_eq.
c) The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the attractive part (-A/r^6) to the total potential energy U_min.
d) The ratio of r_eq to r_0, where u(r_0)=0.4, can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.
e) The ratio of r_s to r_0, where r_s is the separation where the magnitude of the attractive adhesion force is maximum, can be determined by finding the value of r where the derivative of the potential energy with respect to r is equal to zero.
f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the potential energy equation with respect to r and evaluating it at r=r_s.
a) The Lennard-Jones potential provides information about the relationship between energy and separation between two interacting atoms.
At the minimum energy (U_min), the potential predicts the separation r_eq, which corresponds to the equilibrium distance between the atoms. This is the distance at which the energy of the system is at its lowest point.
b) To determine the value of U_min at a given temperature (T=298 K), you can substitute the equilibrium separation r_eq into the Lennard-Jones potential equation and calculate the resulting energy value.
This will give you the U_min for the interaction.
c) The Lennard-Jones potential consists of two components: an attractive component (-A/r^6) and a repulsive component (B/r^12).
The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the magnitude of the attractive component to the total potential energy at the equilibrium separation.
This ratio provides insights into the relative contribution of the attractive force to the overall potential energy at equilibrium.
d) The ratio of r_eq to r_0 can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.
In other words, you need to solve the Lennard-Jones potential equation for r_eq when the potential energy is equal to 0.4 times the potential energy at r=r_0.
e) The ratio of r_s to r_0 is obtained by finding the value of r where the magnitude of the attractive adhesion force is maximum.
This can be determined by finding the separation r where the derivative of the potential energy equation with respect to r is equal to zero.
The value of r_s represents the separation at which the attractive force between the atoms is strongest.
f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the Lennard-Jones potential energy equation with respect to r and evaluating it at r=r_s.
This will give you the magnitude of the maximum attractive adhesion force between the atoms.
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Give reasons. a. Troposphere is affected maximum by human activities.
Answers
Answer:
it is where the ozone layer is locate which is affected by human activities
how would you define a system to determine the rate at which an automobile adds carbon dioxide to the atmosphere
Answers
I would determine the rate at which an automobile adds carbon dioxide to the atmosphere by taking an open system, a control volume just around the area of the outlet where the exhaust gases are released. The boundaries are the sides (for example) of the pipe through which the gas is released.
A general study says that a typical passenger vehicle emits about 4.6 metric tons of carbon dioxide per year. This makes possible assumption that the average gasoline vehicle on the road today has a fuel economy of about 22.0 miles per gallon and drives around 11,500 miles per year. Each and every gallon of gasoline burned creates about 8,887 grams of CO₂.
The amount of CO₂ can be calculated by the above given process.
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Poisons are more serious and harmful than toxins if ingested because the _____ is lower. Small amounts of poison can be extremely dangerous.
Answers
Answer:
The death is lower
Explanation:
im gonna get a warning watch
when carbonates (co32-) or bicarbonates (hco3-) are reacted with an acid in an acid-base reaction, the resulting product is:
Answers
When carbonates (CO3^2-) or bicarbonates (HCO3^-) are reacted with an acid in an acid-base reaction, the resulting product is carbonic acid (H2CO3).
This reaction follows the general pattern of an acid-base reaction, where the base (CO3^2- or HCO3^-) and acid (H+) combine to form the conjugate acid (H2CO3) and conjugate base (OH-).
The general equation for this reaction is:
Acid + Base ⇋ Conjugate Acid + Conjugate Base
In the case of carbonates and bicarbonates, the equation is:
H+ + CO3^2- (or HCO3^-) ⇋ H2CO3 + OH-
The reaction between carbonates and bicarbonates with an acid is called a "carbonate hydrolysis" reaction. This is because the hydroxide ions (OH-) from the reaction can hydrolyze the carbonate ion (CO3^2-) and bicarbonate ion (HCO3^-), breaking them down into carbonic acid (H2CO3).
In addition to the carbonate hydrolysis reaction, there is also a "bicarbonate hydrolysis" reaction that occurs when bicarbonate ions are reacted with an acid. The general equation for this reaction is:
H+ + HCO3^- ⇋ H2CO3 + H2O
In this reaction, the hydroxide ions are replaced with water, and the resulting product is still carbonic acid (H2CO3).
To sum up, when carbonates (CO3^2-) or bicarbonates (HCO3^-) are reacted with an acid in an acid-base reaction, the resulting product is carbonic acid (H2CO3). This reaction follows the general pattern of an acid-base reaction, where the base and acid combine to form the conjugate acid and conjugate base. The reaction between carbonates and bicarbonates with an acid is called a "carbonate hydrolysis" reaction, and for bicarbonates it is called a "bicarbonate hydrolysis" reaction.
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Liquid waters high specific heat is mainly a consequence of the A Small size of the water molecules B. High specific heat of axygen and hydrogen atoms C. Absorption and release of heat when hydrogen bonds break and form. D. Fact that water is a poor heat conductor. E. Higher density of liquid water than solid water (ice)
Answers
Liquid water's high specific heat is mainly a consequence of the absorption and release of heat when hydrogen bonds break and form (option C).
Water molecules are polar, meaning they have a positive and negative end. This polarity allows water molecules to form hydrogen bonds with each other. Hydrogen bonds are weak chemical bonds that are formed between a hydrogen atom that is bonded to a highly electronegative atom, such as oxygen or nitrogen, and another atom that is also highly electronegative.
When water is heated, the kinetic energy of the water molecules increases. This causes the water molecules to move faster and break the hydrogen bonds between them. When water is cooled, the kinetic energy of the water molecules decreases. This causes the water molecules to move slower and form hydrogen bonds between them.
The absorption and release of heat when hydrogen bonds break and form is what gives water its high specific heat. Specific heat is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius. Water has a specific heat of 4,184 Joules per gram per degree Celsius. This means that it takes 4,184 Joules of heat to raise the temperature of 1 gram of water by 1 degree Celsius.
The high specific heat of water is important for life on Earth. It helps to moderate the Earth's temperature and allows for the existence of liquid water, which is essential for life.
Thus, liquid water's high specific heat is mainly a consequence of the absorption and release of heat when hydrogen bonds break and form (option C).
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How many liters of HCI at STP are produced from 150.0 g of chlorine gas?
Answers
Answer:
As we know that
At STP
1 mole of any gas occupies 22.4L
so
15.7L / 22.4L/mole = 0.7moles Cl2
0.7moles x 6.022x10^23molecules/mole = 4.22x10^23molecules
hope it helps
How many grams of carbon should be burned in an excess of oxygen at stp to obtain 2. 21 l of carbon dioxide?.
Answers
STP.
The balanced chemical equation is
C+02+ CO2.
Step 1. Convert litres of CO, to moles of CO2.
STP is 0 °C and 1 bar. At STP the volume of 1 mol
of an ideal gas is 22.71 L.
Moles of CO2= 2.21 L CO2 × (1 mol CO2/22.71 L
CO2) = 0.097 31 mol CO2
Step 2. Use the molar ratio of C:CO2 to convert
moles of CO to moles of C
Moles of C= 0.097 31mol CO2 × (1 mol C/1 mol
CO2) = 0.097 31mol C
Step 3. Use the molar mass of C to calculate the
mass of C
Mass of C= 0.097 31mol C × (12.01 g C/1 mol C) =
1.17 g C
It looks as if you are using the old (pre-1982)
definition of STP. That definition gives a value of
1.18 g C.
Determine the pH, pOH, [H+], and [OH−] of a solution in which 0.300 g of aluminum hydroxide is dissolved in 184 mL of solution.
Answers
Answer:
[OH⁻] = 0.0627M
pOH = 1.20
pH = 12.8
[H⁺] = 1.59x10⁻¹³M
Explanation:
To solve this question we must, as first, find the molarity of Al(OH)₃ in the solution -Molar mass Al(OH)₃: 78.00g/mol-:
0.300g * (1mol/ 78.00g) = 3.846x10⁻³ moles
In 184mL = 0.184L:
3.846x10⁻³ moles / 0.184L = 0.0209M Al(OH)₃. Three times this molarity = [OH⁻]:
[OH⁻] = 0.0209M * 3
[OH⁻] = 0.0627MpOH = -log [OH⁻] =
pOH = 1.20pH = 14 - pOH
pH = 12.8And [H⁺] = 10^-pH
[H⁺] = 1.59x10⁻¹³MPLEASE HELP!!!What are the factors of climate change
Answers
Answer:
According to The genic variations in atmospheric compositions and proper use of land or the other factors the cahs climate change
besides increasing the temperature, how might the rate of an aromatic bromination reaction be increased? by adding a lewis acid catalyst by placing the reaction in the dark by adding naoh by constantly stirring to keep the reaction well mixed
Answers
The rate of an aromatic bromination reaction can be increased by adding a Lewis acid catalyst. The correct option is 1. "by adding a lewis acid catalyst."
A Lewis acid catalyst is a substance that can increase the rate of a reaction without being consumed in the reaction. A Lewis acid catalyst can act as an electron acceptor and facilitate the formation of the intermediate species, which leads to the product faster than the uncatalyzed reaction.
Placing the reaction in the dark may not necessarily increase the rate of an aromatic bromination reaction. Adding NaOH can actually decrease the rate of the reaction as it can neutralize the acid that forms during the reaction. Constantly stirring to keep the reaction well-mixed can also help increase the rate of the reaction by bringing the reactants into contact with each other more frequently.
The complete question is:
Besides increasing the temperature, how might the rate of an aromatic bromination reaction be increased?
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(b) (i)
What is an ion?
(c)
Name two types of ions and state how they are formed
Types of ions:
Answers
Answer:
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
you are previewing science. results are not recorded. consider the same reaction: 1 molecule of carbon monoxide (co) reacts with 1 molecule of chlorine (cl2) to produce some amount of phosgene (cocl2). use the number of atoms in the products to answer the question below. chemical element number of atoms in reactants number of atoms in products c 1 1 o 1 1 cl 2 2 during this reaction, how many molecules of phosgene (cocl2) are produced?
Answers
The number of molecules of phosgene \(COCl_{2}\) produced would depend on the amount of carbon monoxide and chlorine present in the reaction, which is not given in the question.
Based on the information given, we know that 1 molecule of carbon monoxide (CO) reacts with 1 molecule of chlorine \(Cl_{2}\) to produce some amount of phosgene \(COCl_{2}\).
From the number of atoms in the reactants and products, we can see that there is 1 carbon atom, 1 oxygen atom, and 2 chlorine atoms in the reactants, and 1 carbon atom, 1 oxygen atom, and 2 chlorine atoms in the product \(COCl_{2}\).
This means that the reaction does not result in any net gain or loss of atoms.
Therefore, the number of molecules of phosgene \(COCl_{2}\) produced would depend on the amount of carbon monoxide and chlorine present in the reaction, which is not given in the question.
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Help please!
An Arrhenius acid increases the concentration of hydrogen ions when dissolved in solution.
True
False
Answers
Answer:
The answer is true
Explanation:
An Arrhenius acid is a substance that increases the concentration of hydrogen ions in solution when it is dissolved in water.
Answer:
false
Explanation:
Can someone help me
Answers
Answer:the second largest one
Explanation:
both weels are pushing at it
which step in the refining of crude oil involves distilling it into separate components or fractions?
Answers
Fractional distillation is the process of distilling crude oil into distinct parts or fractions during the refinement process.
What is refining?Refining is the process of dividing, removing impurities, and converting raw materials into products that may be used and adhere to strict quality standards.
A physical separation method known as fractional distillation makes use of the various components or fractions of crude oil's different boiling temperatures. The procedure involves vaporizing the crude oil in a fractionating column after it has been heated to a high temperature. Depending on the boiling points of the various components, the vapor cools and condenses at different heights as it ascends the column. The condensed liquids are gathered in various trays, each of which holds a percentage with a particular boiling point range and chemical make-up.
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which of the following will increase the rate of a chemical reaction? increase the temperature at which the reaction occurs. allow the reaction to proceed for a longer time. decrease the concentrations of the reactants. decrease the amount of time in which the reaction is allowed to occur. decrease the temperature at which the reaction occurs.
Answers
Option C is correct. reduce reactant concentrations. shorten the time the reaction is allowed to proceed.
The reaction rate normally increases as the temperature rises. With rising temperature, the average kinetic energy of the reactant molecules rises. The minimum energy needed for an effective collision will therefore be present in a higher percentage of molecules. With rising temperatures, molecules' kinetic energy rises. The possibility of a reaction rises as molecules move more quickly and collide more frequently. This speeds up the reaction. The average kinetic energy of the individual particles of the system increases with increasing temperature. Particles move faster and collide more often per unit time as the average kinetic energy increases, and they have more energy when they collide. Both of these factors speed up the reaction.
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How many match sticks will there be in the 4th picture?
Answers
In what situation does water undergo a physical change?
Answers
Answer:
There are actually two.
Explanation:
When water freezes it turns to ice however it still has the molecular properties of water. Same thing when it evaporates.
Chlorine has a melting point of 168K. Chlorine does not conduct electricity. Aluminum has a melting point of 933K. Aluminum conducts electricity. A substance with an unknown identity has a melting point of 2349K. The unknown substance does not conduct electricity. Use this information and your knowledge about bonding, intermolecular forces, and structure and properties to answer the following questions about these substances.
List the bonds/interactions that are overcome when aluminum melts.
Answers
When aluminum melts, the bonds/interactions that are overcome are metallic bonds. Aluminum is a metal that exhibits metallic bonding. Metallic bonds occur between metal atoms and are characterized by the delocalization of valence electrons throughout the entire crystal lattice.
In a solid state, aluminum atoms are arranged in a closely packed structure, with their outermost electrons free to move between neighboring atoms. These mobile electrons create a "sea" of delocalized electrons that hold the metal ions together in a three-dimensional network. This bonding is responsible for the high melting point of aluminum. When aluminum is heated to its melting point of 933K, the energy supplied breaks the metallic bonds, allowing the atoms to move more freely and transition from a solid to a liquid state. The melting process involves overcoming the forces that hold the metal ions in place and breaking the shared electron cloud. Once the metallic bonds are overcome, aluminum transforms into a liquid and can flow and take the shape of its container.
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Name the following compounds:
Answers
1. The name of the compound is 2-methyl-2-hexene
2. The name of the compound is 4-ethyl-3,5-dimethylnonane
3. The name of the compound is 4-methyl-2-heptyne
4. The name of the compound is 5-propyldecane
How do i determine the name of the compound?The name of each compound given in the question can be obtained as follow:
For question 1
Locate the longest continuous carbon chain. In this case it is carbon 6. Hence, the parent name is hexene since a double bond is involvedIdentify the substituent groups attached. In this case the substituent group attached is methyl, CH₃ Give the substituent the lowest possible count while considering the double bond. In this case, CH₃ is located at carbon 2Combine the above to obtain the IUPAC name for the compound.Thus, the IUPAC name for the compound is: 2-methyl-2-hexene
For question 2
Locate the longest continuous carbon chain. In this case it is carbon 7. Hence, the parent name is nonaneIdentify the substituent groups attached. In this case the substituent groups attached are methyl, CH₃ and ethyl, CH₂CH₃ Give the substituents the lowest possible count. In this case, the two CH₃ are located at carbon 3 and 5 while the CH₂CH₃ is located at carbon 4Combine the above to obtain the IUPAC name for the compound.Thus, the IUPAC name for the compound is: 4-ethyl-3,5-dimethylnonane
For question 3
Locate the longest continuous carbon chain. In this case it is carbon 7. Hence, the parent name is heptyne since a triple bond is involvedIdentify the substituent group attached. In this case the substituent group attached is methyl, CH₃ Give the substituent the lowest possible count while considering the triple bond. In this case, CH₃ is located at carbon 4Combine the above to obtain the IUPAC name for the compound.Thus, the IUPAC name for the compound is: 4-methyl-2-heptyne
For question 4
Locate the longest continuous carbon chain. In this case it is carbon 10. Hence, the parent name is decaneIdentify the substituent groups attached. In this case the substituent group attached is propyl, CH₂CH₃CH₃ Give the substituent the lowest possible count. In this case, CH₂CH₃CH₃ is located at carbon 5Combine the above to obtain the IUPAC name for the compound.Thus, the IUPAC name for the compound is: 5-propyldecane
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How many molecules are contained in 125 grams of water, H20?
Answers
Answer:18.015 g
Explanation:
Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g
will give brainlist to a person with correct answers for all (please help me)
1. Explain how is LiCl formed?
2. What is a combination/synthesis reaction
3. What is a decomposition reaction?
4. What is a single-replacement reaction?
5. What is a double-replacement reaction?
6. What are the trends in electronegativity within groups and across periods in the periodic table?
7. Which element has the lowest electronegativity value?
8. How does electronegativity determine the type of bond that atoms will form?
9. What type of bond will form between 2 atoms that have a large difference in electronegativity?
10. What type of bond will form between 2 atoms when the difference in electronegativity is 0.5?
11. Which element has the highest electronegativity value?
12. What does it mean that matter cannot be created nor destroyed in a Chemical reaction?
Answers
Answer:
1. LiCi is formed by the treatment of lithium carbonate with hydrochloric acid
2. A combination reaction (also known as a synthesis reaction) is a reaction where two or more elements or compounds (reactants) combine to form a single compound (product).
3. Chemical decomposition, or chemical breakdown, is the process or effect of simplifying a single chemical entity into two or more fragments.
4. A single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound
5. Double replacement reactions have two ionic compounds that are exchanging anions or cations.
6. The most electronegative elements are found on the top right of the periodic table.
7. cesium
8. Electronegativity describes the degree to which an atom attracts electrons in a chemical bond. But the electronegativity of two atoms would determine their bond type.
9. ionic bond
10. polar covalent bond
11. fluorine
12. Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change.
Hope i was able to help!!!
ASSERTION –REASON
1. Assertion (A): The slow process of conversion of dead vegetation into coal is called
carbonisation. Reason (R): When heated in air, coal burns and produces mainly carbon dioxide gas. A) A is correct and R is the correct explanation of A. B) A is correct and R is not the correct explanation of
C) A is correct and R is wrong. D) A is wrong and R is correct. 2. Assertion (A): Natural gas is a very important fossil fuel. Reason (R): It is a cleaner fuel. A) A is correct and R is the correct explanation of A. B) A is correct and R is not the correct explanation of
C) A is correct and R is wrong. D) A is wrong and R is correct
Answers
The correct option is A) A is correct and R is the correct explanation of A. Assertion (A) is correct as the slow process of conversion of dead vegetation into coal is called carbonization.
Reason (R) is correct because when coal is heated in air, it burns and produces mainly carbon dioxide gas.
2. The correct option is A) A is correct and R is the correct explanation of A.Assertion (A) is correct as natural gas is an important fossil fuel.Reason (R) is correct as natural gas is a cleaner fuel as compared to other fossil fuels such as coal and petroleum. It produces less carbon dioxide and other pollutants when burned.
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I don’t understand what I am supposed to do with this
Answers
what is the molarity of kmno4 in a solution of 0.0897 g of kmno4 in 0.450 l of solution?
Answers
The molarity of KMnO4 in the given solution is approximately 0.00126 M. Molarity is a measure of the concentration of a solute in a solution. It represents the number of moles of the solute present per liter of the solution.
To determine the molarity of KMnO4 in the given solution, we need to first calculate the number of moles of KMnO4 using its mass and molar mass, and then divide it by the volume of the solution.
The molar mass of KMnO4 can be calculated as follows:
(1 × atomic mass of potassium) + (1 × atomic mass of manganese) + (4 × atomic mass of oxygen)
= (1 × 39.10 g/mol) + (1 × 54.94 g/mol) + (4 × 16.00 g/mol)
= 39.10 g/mol + 54.94 g/mol + 64.00 g/mol
= 158.04 g/mol
Now, let's calculate the number of moles of KMnO4:
Number of moles = Mass / Molar mass
Number of moles = 0.0897 g / 158.04 g/mol
Number of moles ≈ 0.000567 mol
Next, we need to calculate the molarity using the number of moles and the volume of the solution:
Molarity (M) = Number of moles / Volume (in liters)
Molarity = 0.000567 mol / 0.450 L
Molarity ≈ 0.00126 M
In this case, the molarity tells us the concentration of KMnO4 in moles per liter.
Learn more about potassium at: brainly.com/question/13321031
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