It is a redox reaction since the oxidation number of carbon was increased from zero to four and that of oxygen was decreased from zero to -2.
What is a redox reaction?A redox reaction (short for reduction-oxidation reaction) is a type of chemical reaction in which there is a transfer of electrons between two chemical species. In a redox reaction, one reactant undergoes oxidation (loses electrons) while the other undergoes reduction (gains electrons).
Oxidation refers to the loss of electrons, while reduction refers to the gain of electrons. The substance that undergoes oxidation is called the reducing agent, as it causes the other reactant to be reduced.
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Calculate the equilibrium constant for the chemical reaction, given the equilibrium concentrations of the reactants and products in the table.
2AB(aq)+4CD(aq)↽−−⇀2AD(aq)+2BD(aq)+4C(aq)
The value of the equilibrium constant is independent of the initial concentration of the reactants. It has a definite value for every reversible reaction at a particular temperature.
What is equilibrium constant?The equilibrium constant can be defined as the ratio of the product of molar concentrations of the products to that of the reactants with each concentration term raised to a power equal to its coefficient in the balanced chemical equation.
The expression of the equilibrium constant is:
Keq = [AD]² [BD]² [C]⁴ / [AB]²[CD]⁴
Thus the expression of the equilibrium constant is determined.
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PLEASE HELP
How many liters of CO2 are produced when 48.92g CaCO3 decomposes?
Explanation:
OK thank you so much I hope you are well
Calcium Chloride Calcium chloride (CaCl₂) is a white solid soluble in water. It is the main constituent of several medicinal drugs used to treat calcium deficiency (low levels) in the human body. In agriculture, it is used to provide supplemental calcium to plants to delay their aging. 1. Pick out from the text, the use of calcium chloride in medication.
Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.
Explanation:
You have a balloon filled with carbon dioxide gas as STP. The balloon’s volume is 2.8L. how many molecules are in it?
52×1022 molecules =2×7. 52×1022=15×1022.
= 15,330
Pls I need help urgently. What can be predicted about meniscus formation if the adhesion and cohesion forces were equal in the graduated cylinder?
Answer: Flat. The meniscus will be flat/neutral with no curves if adhesion and cohesion are equal.
Pls I need help urgently. If you continue to putting one drop of water on one side of the paper towel, what do you observe happening to the water, the more drop you add? Explain
Answer:
the water is being observed a bi paper towel material through a process called capillary action capital reaction on Sonu's capability is a rising or absorption
Answer: The water spreads out and covers a larger area on the paper towel.
How to solve , how many grams of KI are in 25. 0 ml of a 3. 0%(m/v) KI solution
The grams of the KI are in the 25.0 ml of a 3.0 % m/v of the KI solution is 0.75 g.
The volume of the solution = 25 mL
The mass by volume of KI = 3 % m/v
The potassium iodide solution will contain the 3.0 g of the potassium iodide for the every 100 mL of the solution.
The amount of the KI in grams is as follows :
The mass of the KI in grams = (25 mL× 3 g ) / 100 mL
The mass of the KI in grams = 0.75 g
Thus, the amount of the KI in the grams is 0.75 g in the volume of the 25 mL.
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Deposition is a process that… A: moves rock particles. B: drops sediment. C: breaks down rock. D: dissolves sediment
Answer:
cbbb vdf jfjd hx
Explanation:
Easy question find total charge in photo will rate 5 stars
The total charge on the atom is +1 and the correct option is option 3.
What is Bohr Model of atom?According to the Bohr Atomic model, a small positively charged nucleus is surrounded by revolving negatively charged electrons in fixed orbits.
He concluded that electron will have more energy if it is located away from the nucleus whereas electrons will have less energy if it located near the nucleus.
In a neutral atom, the number of protons is equal to the number of electrons.
Since, this atom has 11 protons and 10 electrons, thus there is one extra protons which gives it a +1 charge.
Therefore, the total charge on the atom is +1 and the correct option is option 3.
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How many moles of KNO3 would have to be added to 100g of water to form a saturated solution at 10C?
We need to add 0.316 moles of KNO3 to 100g of water to form a saturated solution at 10°C.
How to determine the number of moles would have to be added ?
To determine how many moles of KNO3 would have to be added to 100g of water to form a saturated solution at 10°C, we need to know the solubility of KNO3 at this temperature.
According to the solubility data, the solubility of KNO3 at 10°C is approximately 32 grams per 100 grams of water.
So, to make a saturated solution at 10°C, we need to add 32 grams of KNO3 to 100 grams of water.
Now, we can calculate the number of moles of KNO3 needed using its molar mass :
Molar mass of KNO3 = 101.1 g/mol
Number of moles of KNO3 = mass of KNO3 / molar mass of KNO3
Number of moles of KNO3 = 32 g / 101.1 g/mol
Number of moles of KNO3 = 0.316 moles
Therefore, we need to add 0.316 moles of KNO3 to 100g of water to form a saturated solution at 10°C.
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(ALOT OF QUESTIONS) if anybody sees this can they help me out?
Which of the following statements is true about strong, weak, and nonelectrolytes?
A) Strong electrolytes partially dissociate in water, weak electrolytes partially dissociate, and nonelectrolytes completely dissociate.
B) Strong electrolytes partially dissociate in water, weak electrolytes completely dissociate, and nonelectrolytes do not dissociate.
C) Strong electrolytes completely dissociate in water, weak electrolytes do not dissociate, and nonelectrolytes partially dissociate.
D) Strong electrolytes completely dissociate in water, weak electrolytes partially dissociate, and nonelectrolytes do not dissociate.
Which of the following substances is insoluble in water, according to these solubility rules?
A) Sodium chloride (NaCl)
B) Calcium hydroxide (Ca(OH)2)
C) Potassium nitrate (KNO3)
D) Silver chloride (AgCl)
Which of the following ions is soluble in water when paired with according to the solubility rules chart?
C) Chloride (Cl-)
B) Sulfate
D) Hydroxide (OH-)
A) Carbonate
Question 12 (1.25 points)
Which of the following combinations will result in a precipitate, according to solubility rules?
A) Sodium nitrate (Na2CrO4) and barium chloride (BaCl2)
B) Ammonium chloride (NH4Cl) and sodium hydroxide (NaOH)
C) Calcium sulfate (CaSO4) and sodium carbonate (Na2CO3)
D) Potassium iodide (KI) and silver nitrate (AgNO3)
Question 13 (1.25 points)
Which of the following statements is true about dilute and concentrated solutions?
A) Dilute solutions have a higher solvent-to-solute ratio than concentrated solutions.
B) Concentrated solutions contain more solute than dilute solutions.
C) Dilute solutions contain more solute than concentrated solutions.
D) Concentrated solutions have a higher solvent-to-solute ratio than dilute solutions.
Question 14 (1.25 points)
What volume of a 0.500 M sodium chloride solution is required to make 500. mL of a 0.100 M sodium chloride solution?
A) 100 L
B) 0.100 ml
C) 0.100 L
D) 1 L
Question 15 (1.25 points)
A student has a 0.500 M solution of hydrochloric acid (HCl) that is too concentrated for an experiment. The student needs to dilute the solution to 0.100 M. If the student needs 250 mL of the diluted solution, how much of the original solution should be used?
A) 250 ml
B) 50.0 ml
C) 125 ml
D) 500 ml
The statement that is true about strong electrolytes , weak electrolytes , and non-electrolytes is:
Strong electrolytes completely dissociate in water, weak electrolytes partially dissociate, and nonelectrolytes do not dissociate. Option DSilver chloride (AgCl) is insoluble in water; option D.
Chloride (Cl-) ion is soluble in water; option C
Potassium iodide (KI) and silver nitrate (AgNO₃) will result in a precipitate, according to solubility rules; option D.
Dilute solutions have a higher solvent-to-solute ratio than concentrated solutions; option A.
What volume of a 0.500 M sodium chloride solution is required to make 500 mL of a 0.100 M sodium chloride solution?The volume of sodium chloride solution required is calculated using the formula:
M1V1 = M2V2Where:
M1 = 0.500 M (initial concentration)
V1 = volume of initial solution (unknown)
M2 = 0.100 M (final concentration)
V2 = 500 mL = 0.500 L (final volume)
Rearranging the formula to solve for V1, we get:
V1 = M2V2/M1
V1 = (0.100 M)(0.500 L)/(0.500 M)
V1 = 0.100 L
The volume of the 0.500 M sodium chloride solution required is 0.100 L.
15. The volume of the original solution required will be;
M1V1 = M2V2
Where:
M1 = 0.500 M (initial concentration)
V1 = volume of initial solution (unknown)
M2 = 0.100 M (final concentration)
V2 = 250 mL = 0.250 L (final volume)
Rearranging the formula to solve for V1, we get:
V1 = M2V2/M1
V1 = (0.100 M)(0.250 L)/(0.500 M)
V1 = 0.050 L or 50.0 mL
The volume of the original 0.500 M hydrochloric acid solution needed is 50.0 mL.
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I NEED HELP ON THIS ASAP!!!
Write a one paragraph summary about atomic model(s). Be sure to describe the process one must go through to create a model. Also, briefly explain the mathematical data needed to create an accurate model.
Explanation:
The atomic model is a scientific theory that describes the structure and behavior of atoms. In the early 20th century, scientists began to develop new models of the atom as they discovered more about its properties. One of the earliest models was proposed by J.J. Thomson in 1897, which suggested that the atom was a sphere of positive charge with negatively charged electrons embedded within it. This model was later replaced by the Rutherford model in 1911, which showed that the atom had a small, dense nucleus surrounded by orbiting electrons. The modern quantum mechanical model of the atom, which is widely accepted today, uses complex mathematical equations to describe the behavior of electrons within atoms. To create an accurate model, scientists must use experimental data, such as the energy levels of electrons, the wavelengths of light emitted by atoms, and the positions of spectral lines, to calculate the probabilities of where electrons are likely to be found within the atom. The resulting model allows scientists to make predictions about how atoms will behave under different conditions, and it has many practical applications in fields such as chemistry, physics, and engineering.
Answer:
Atomic models are representations of the structure of an atom. They are important tools in understanding the behavior of atoms and their interactions with other atoms. In creating an atomic model, scientists must first gather and analyze experimental data to determine the properties and behavior of the atoms. They then use mathematical equations and theories, such as quantum mechanics, to develop a model that accurately represents the observed behavior of the atoms. The model must take into account the position and movement of the electrons around the nucleus, as well as the various energy levels of the electrons. By studying atomic models, scientists have been able to make important discoveries about the nature of matter and the fundamental forces that govern the behavior of atoms.
Explanation:
Calculate the mass of oxygen gas formed when 10g of potassium trioxocarbonate (vi) is heated strongly. (K= 39, O=16, N=14)
One mole of potassium carbonate decompose to give one mole or 32 g of oxygen. Hence, 10 g of potassium carbonate will give 2.31 g of oxygen gas.
What is decomposition reaction?Decomposition is type of reaction in which the one compound breaks into its constituent elements and compounds. Potassium carbonate is an ionic compound which can decomposed on heating to given CO and oxygen gas as follows:
[tex]\rm K_{2}CO_{3} \rightarrow 2 K + O_{2} + CO[/tex]
As per this balanced chemical equation of the decomposition, one mole of potassium carbonate produces one mole of oxygen gas.
molar mass of potassium carbonate = 138 g/mol
molecular mass of O₂ = 32 g/mol
Hence, 138 g of potassium carbonate gives 32 g of oxygen gas. Then, 10 g of potassium carbonate will give
(10 × 32)/138 = 2.31 g.
Therefore, the mass of oxygen formed from 10 g of potassium carbonate will be 2.31 g.
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reflection
about balancing chemical equation
and molecular wiegth and mollar mass
and molecular ratio and moles of molecules / atoms/
pwede nyo bang gawin Lahat Yan ng reflection
We know a balanced equation by counting the atoms of both sides of the reaction equation.
How do you balance chemical equation?It seems you are asking something about the balancing of chemical reaction equations and I will explain just that.
Balancing a chemical equation involves making sure that the number of atoms of each element on the reactant side of the equation is equal to the number of atoms of that element on the product side of the equation. Here are the steps to balance a chemical equation:
Write the chemical equation using the correct chemical formulas for the reactants and products.
Count the number of atoms of each element on the reactant side and the product side of the equation.
Identify the element that is not balanced.
Use coefficients (numbers in front of the chemical formulas) to balance the equation. Start with the element that appears in the fewest number of compounds and work your way up.
Double-check that the equation is balanced by counting the number of atoms of each element on both sides of the equation.
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reflection
about balancing chemical equation
and molecular wiegth and mollar mass
and molecular ratio and moles of molecules / atoms/
pwede nyo bang gawin Lahat Yan ng reflection
Answer:
The chemical equation for this reaction above would be written as: 2 H 2 ( g) + O 2 ( g ) → 2 H 2 O ( g )
Explanation:
What is a key difference between chemical and nuclear reactions?
The key difference in between the chemical and the nuclear reactions is Chemical reaction will occurs outside the nucleus and the Nuclear reaction occurs inside the nucleus.
The Chemical reaction will normally occurs outside the nucleus. The Nuclear reaction will only occurs inside the nucleus. When the chemical reactions occur the elements will hold their identity and the nuclei of the atoms also be remains unchanged. During the nuclear reactions, the nuclei of the atoms will changes completely and the new elements are formed.
The chemical reactions will be balance in terms of the mass and the nuclear reaction will occurs in the terms of the mass and the energy.
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What volume of a 0.500 M sodium chloride solution is required to make 500. mL of
a 0.100 M sodium chloride solution?
1L
100 L
0.100 L
0.100 ml
Explanation:
Refer to pic..... .. .....
Given the volume of the 0.500 M sodium chloride solution is 500 mL. Then, the volume of 0.100 M sodium chloride solution is 2500 ml.
What is molarity ?Molarity of a solution is the ratio of its number of moles of solute to the volume of solution in liters. It is the common term to express the concentration of a solution.
The product of molarity and volume then being the number of moles of solute in the solution. Let V1 and M1 be the volume of molarity of a solution and V2 and M2 be the volume and concentration of the diluted solution.
then,
M1 V1 = M2 V2
Given,
M1 = 0.500 M
V1 = 500 mL
M2 = 0.100 M
then V2 = M1 V1/ M2
V2 = 0.500 M × 500 ml /0.100 M
= 2500 ml.
Therefore, the volume of the diluted solution is 2500 ml.
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If pressure of a gas is 722.4 torr and the volume is 3.79litre and the temperature is 300K what will be the no of moles?( can the gas eq constant be used in tore and atm)
Answer:0.146 torr
Explanation:
Yes to the gas constant
you use 0.0821 L.atm/mol.k If you want pressure in atm
use 62.44 L.torr/ mol.k if you want pressure in torr
n=PV/RT
n= 722.4 X 3.79/(62.44 X 300) =
Which statement describes the formation of galaxies?
They begin in nebulas.
Heat and gases contract.
Gravity causes stars to cluster.
Dust and gases contract.
The statement that describes the formation of galaxies is "Gravity causes stars to cluster."
What is galaxies ?
Large systems of stars, gas, dust, and dark matter are known as galaxies, and they are bound together by gravity. These galaxies, which range in size from dwarf galaxies with only a few million stars to gigantic galaxies with trillions of stars, are the fundamental units of the universe.Spiral galaxies, elliptical galaxies, irregular galaxies, and lenticular galaxies are only a few of the different sizes and shapes of galaxies. The number and configuration of a galaxy's arms, the existence of a central bulge, and the quantity of interstellar gas and dust are only a few of the distinctive features that distinguish each type of galaxy from another.The statement that describes the formation of galaxies is "Gravity causes stars to cluster."
Galaxies form from the accumulation of gas, dust, and dark matter through the force of gravity. As the gas and dust in a galaxy cluster together, they begin to collapse under their own gravity, forming stars. Over time, these stars cluster together and form galaxies. Therefore, the correct statement that describes the formation of galaxies is gravity causes stars to cluster.
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A student mixed 24.5 g of magnesium bromide with 8.67 x 1022 molecules of hydroiodic acid... They recovered 8.23 g of acid. What is the percent yield?
Explanation:
Refer to pic............
How many grams of solute are present in 585 mL of 0. 610 M KBr?
mass of solute:
The grams of solute present in 585 mL of 0. 610 M KBr is given by Mass of solute = 42.46 g KBr.
The total number of moles of solute per litre of solution is defined as the molarity of a specific solution. Because, unlike mass, the volume of a system changes with changes in physical circumstances of the system, the molality of a solution is reliant on changes in physical qualities of the system such as pressure and temperature. M, which stands for molarity, represents molarity.
M = 0.610 and V = 585mL = 0.585 L
Molarity is given by,
M = mol/V
M is molarity.
mol is moles of solute.
V is volume of solution in liters.
we need to determine moles so,
0.610 = mol / 0.585
mol = 0.35685 mol KBr
We must now convert this mole quantity to mass. KBr has a molar mass of 39.098 g/mol + 79.904 g/ mol = 119.002 g / mol.
0.3568 x 119.002 = 42.46 g KBr.
So, the mass of solute is 42.46 g KBr.
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i need help due im 20 mins
Describe the feedback loop involving water vapor and temperature. Is it positive or negative?
Answer:
The feedback loop involving water vapor and temperature is a positive feedback loop. As temperature increases, the amount of water vapor that can be held in the atmosphere also increases. This leads to an increase in the amount of water vapor in the atmosphere, which further amplifies the greenhouse effect and contributes to additional warming.
In other words, warmer temperatures lead to more water vapor in the atmosphere, which traps more heat, causing further warming, and so on. This positive feedback loop can amplify the initial warming effect caused by other factors such as greenhouse gas emissions or changes in solar radiation.
Conversely, if the temperature decreases, the amount of water vapor that can be held in the atmosphere decreases, which can lead to a decrease in the amount of water vapor present in the atmosphere, reducing the greenhouse effect and contributing to cooling. However, this negative feedback loop is weaker than the positive feedback loop described above, and it tends to be dominated by the positive feedback loop under most circumstances.
In what way can we play our role in the field of science? (as a student)
I NEED THIS FAST!!
How many grams are in 9.100 X 10/20 molecules of uranium(V) oxide, U2O5?
Explanation:
Refer to pic............
Which of the following is NOT a safety precaution for handling radioactive material?
A. Store radioactive material in a shielded container.
B. Remove all metal before entering the containment room.
C. Use tongs or robotic arms to handle materials.
D. Monitor exposure with a film dose bandage.
The option which is not a safety precaution for handling Radioactive material is option B. Remove all metal before entering the containment room.
Radioactive substances are those which have an unstable nucleus. They achieve stability by emitting radiations like alpha particles, beta particles and gamma rays.
Working or experimenting on such substances can pose serious health risks like cancer, cardiovascular diseases etc.
Therefore following strict safety precautions while handling radioactive material is mandatory.
Certain safety measure could include
1) Protect the skin from radiation exposure by using film bandages.
2) When the radioactive sample is not in use, store them in a shielded container right away.
3) Always use gloves, tongs or remote operated robotic arms to handle the samples.
4) Do not eat, drink, smoke, or apply cosmetics in the laboratory.
5) Wear disposable clothes to reduce the risk of contamination from the samples.
Therefore, The option which is not a safety precaution for handling Radioactive material is option B. Remove all metal before entering the containment room.
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What is the specific rotation of (R)-(-)-monosodium glutamate
The specific rotation of a substance is a measure of its ability to rotate the plane of polarized light. It is usually denoted by the symbol [α] and is expressed in degrees per unit length and concentration.
The specific rotation of (R)-(-)-monosodium glutamate is -2.4° (or -2.4 degrees) when measured in a 1-decimeter cell at a concentration of 10 g/100 mL in water. The negative sign indicates that the rotation is counterclockwise or left-handed, which is typical for most amino acids.
Note that the specific rotation of a substance can vary depending on the wavelength of light used and the temperature at which the measurement is taken. Therefore, it is important to specify these parameters when reporting the specific rotation of a substance.
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Why is the temperature of the system increasing when there is plenty of ice still present?
Explanation:
The temperature of the system is increasing because the ice is melting and releasing energy in the form of heat. The energy released when the ice melts is greater than the energy needed to maintain the temperature of the system, causing the temperature to increase.
pls help!!!!! and please provide explanation i will give brainlist
A) To calculate the total bond energy, we need to know the bonds broken and formed in the reaction. In this case, the reactants are C₂H₄ and H₂, and the product is C₂H₆.
Reactants:
C₂H₄ has one C=C bond and four C-H bonds. Total bond energy
= (1 x 614 kJ/mol) + (4 x 413 kJ/mol) = 2462 kJ/mol
H2 has one H-H bond. Total bond energy
= 1 x 436 kJ/mol = 436 kJ/mol
Products:
C₂H₆ has six C-H bonds and one C-C bond.
Total bond energy
= (6 x 413 kJ/mol) + (1 x 348 kJ/mol) = 2862 kJ/mol
Total energy = reactant energy - product energy = (2462 kJ/mol + 436 kJ/mol) - 2862 kJ/mol = 36 kJ/mol
Therefore, the total bond energy for the reaction is 36 kJ/mol.
B) The reaction is exothermic because the total energy is negative (-36 kJ/mol). This means that energy is released when the reaction occurs.
C) The formation of C-C bond releases energy (348 kJ/mol), and the breaking of C=C bond requires energy input (614 kJ/mol). The formation of four C-H bonds releases energy (4 x 413 kJ/mol = 1652 kJ/mol), and the formation of two additional C-H bonds releases more energy (2 x 413 kJ/mol = 826 kJ/mol). The breaking of one H-H bond requires energy input (436 kJ/mol).
The total energy released by the formation of new bonds is greater than the energy required to break the old bonds, resulting in an exothermic reaction.
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need this done quick
Explanation:
1a) c since c is the biggest part of the pie chart
1b) 25% as it is close to a quarter
quarter=25%
1c) A=10%
1d) I think Mr.M's class was difficult since 35% of people got decent grades (a and b). As that is a percentage less than half of the class i would consider that as a difficult class.
Hope this helped.