Determine the dissociation constants for the acids. Express the answers in proper scientific notation where appropriate.
Acid A: pKa=6.0 Ka=
Acid B: pKa=9.10 Ka=
Acid C: pKa=−2.0 Ka=
Which is the strongest acid?
Answers
The dissociation constants for the acid A is 1.0 x 10⁻⁶, B is 7.9 x 10⁻¹⁰, C is 100.
To determine the dissociation constants (Ka) for the acids, we will use the formula:
Ka = 10^(-pKa)
Calculating the Ka values for the acids:
Acid A: Ka = 10^(-6.0) = 1.0 x 10⁻⁶
Acid B: Ka = 10^(-9.10) = 7.9 x 10⁻¹⁰
Acid C: Ka = 10^(2.0) = 100
The strongest acid is the one with the highest Ka value, which is acid C with a Ka of 100. This means that acid C is completely dissociated in solution, making it a strong acid. Acids A and B are weaker acids, with Ka values of 1.0 x 10⁻⁶ and 7.9 x 10⁻¹⁰), respectively.
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Related Questions
according to the ideal gas law, what happens to the volume of a gas when the pressure doubles (all else held constant)? apex
Answers
Pressure and volume are proportional in direct variation, with the temperature and the number of gas molecules constant.
According to the Ideal Gas Law, what happens to the volume of a gas when the pressure doubles (all else held constant)
If the pressure of a gas is doubled (all other variables being constant), the volume of the gas will be halved. The formula for the Ideal Gas Law is PV = nRT,
where P = pressure, V = volume,
n = number of moles of gas,
R = the universal gas constant, and T = temperature.
The law states that the product of pressure and volume is proportional to the absolute temperature of the gas when all other variables are constant.
In a fixed container with a fixed number of molecules, doubling the pressure reduces the volume by half. The relationship between pressure and volume is a positive linear one. Pressure and volume are proportional in direct variation, with the temperature and the number of gas molecules constant.
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Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm At, and 0.15 atm He
Answers
Answer:
Total pressure in container = 6.7 atm
Explanation:
Given:
N₂ = 3.5 atm
O₂ = 2.8 atm
At = 0.25 atm
He = 0.15 atm
Find:
Total pressure in container
Computation:
Total pressure in container = N₂ + O₂ + At + He
Total pressure in container = 3.5 + 2.8 + 0.25 + 0.15
Total pressure in container = 6.7 atm
how can a small contained fire be extinguished most easily?
Answers
If the fire is contained in a beaker or a small vessel, it can often be extinguished by covering the vessel with a wire gauze or addition of sand or dry ice. If the fire is in a larger vessel or has spread, dry ice is very effective.
What is meant by vessel?
A ship or a sizable boat is a vessel. a tube that the body's blood travels through to circulate. A network of arteries, arterioles, capillaries, venules, and veins make up the blood vessels.Your body's blood travels through blood arteries, which act as conduits. They create a circuit-like closed loop that starts and finishes at your heart.Your circulatory system is made up of blood vessels and heart vessels. About 60,000 miles of blood arteries make up your body.The main type of water-conducting cell in flowering plants is called a vessel cell. Vessel cells are modified tracheids in which the end walls have lost their primary membranes, allowing for direct, unhindered connections for water transport between the cells.To learn more about vessel refer to
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How glycerin is form?
Answers
weaving nearly died out because factories can make fabrics faster than people who create them by hand. question 2 options:
true OR false
Answers
Answer:
True
Explanation:
A hand weavers would take much more time in their craft than large factories did, their industry began to decline and be replaced by industrial machines.
What is the first thing you have to do if there is a fire in the lab.
Answers
The first thing you should do when there is a fire in the laboratory is to alert people.
What is OSHA?OSHA is an abbreviation for occupational safety and health administration.
The main purpose of OSHA.The Occupational Safety and Health Administration (OSHA) is an agency of the federal government that is saddled with the following responsibilities:
Assuring and ensuring safe and healthy working conditions for employees or workers.Setting and enforcing standards, rules, and laws.Providing education, trainings and assistance to various organizations.According to the Occupational Safety and Health Administration (OSHA), the first thing a worker or student should do when there is a fire in the laboratory is to alert people.
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"According to utilitarianism, something as simple as brushing your teeth could be a moral act" True False
Answers
The statement "According to utilitarianism, something as simple as brushing your teeth could be a moral act" is True because Utilitarianism is a moral theory that suggests that actions are morally right if they lead to the greatest happiness for the greatest number of people.
In this framework, any action that increases overall happiness or reduces overall suffering is considered a moral act.
Even something as simple as brushing your teeth can be considered a moral act from a utilitarian perspective if it prevents dental problems and leads to greater overall well-being for yourself and others who may benefit from your good oral health.
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question 28 options: question 4 l: if you found that the protein produced by husno-1 created a brown pigment and the protein produced by husno-3 created a light-yellow pigment, if the brown pigment was haplosufficient for determining the nail color, what is the likely color of the nails of individual 1? please just enter the color as a single word.
Answers
Based on the facts available, it may be assumed that individual 1's nails would be brown.
If the protein generated by husno-1 produces a brown pigment and the protein produced by husno-3 produces a light-yellow pigment, and the brown pigment is haploinsufficient for determining nail color. This is due to the fact that the protein made by Husno-1 only needs to be present in one functioning copy in order to produce the brown pigment and define the nail color. Because the brown pigment is haploinsufficient, individual 1's nails would still be brown even if they only have one copy of the gene responsible for it.
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These two substances are not the same. They are both green and they are both soluble in water. One substance has a melting point of 115°C, is soluble in alcohol, and has a density of 1.88 g/cm3. The other substance breaks apart at 560°C, is not soluble in alcohol, and has a density of 3.60 g/cm3. They have different properties.
How could this explanation be improved?
Answers
Answer:
This explanation could be improved by specifying the two substances being compared and giving more detailed information about their properties, such as their chemical structure, molecular formula, and other physical and chemical characteristics. Additionally, describing why the two substances have different properties, such as differences in bonding type or molecular arrangement, could provide a more comprehensive explanation.
What is the pH of a 4.7 x 10-9 M HCl solution? *
4.67
8.33
11.21
2.93
Answers
When the concentrations of both reactants A and B are doubled the rate increases by a factor of 4. The reaction is second order in B. Determine the order of the reaction in A. a) Zero b) First OC) Second d) Fourth
Answers
The order of the reaction in A is zero.
Is the reaction order in A zero?The given information states that when the concentrations of both reactants A and B are doubled, the rate of the reaction increases by a factor of 4. It is also mentioned that the reaction is second order in B. From this data, we can deduce the order of the reaction in A.
Since doubling the concentration of B has a direct impact on the rate, it indicates that the reaction is dependent on the concentration of B. As the reaction is second order in B, doubling its concentration leads to a 4-fold increase in the rate. However, the concentration of A does not affect the rate of the reaction. This suggests that the order of the reaction in A is zero, meaning that the rate of the reaction does not change with changes in the concentration of A.
In summary, the order of the reaction in A is zero, while the reaction is second order in B.
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A 12.17 g sample of a compound contains 7.77 g of iron, Fe, 1.44 g of phosphorus, P, and oxygen, O. Calculate the empirical formula for the compound.
Answers
Answer:
Fe₃PO₄
Explanation:
They have given the total mass of the compound, the mass of iron and the mass of phosphorus. So we can find the mass of oxygen.
Mass of oxygen = 12.17 - (7.77 + 1.44) = 2.96g
So we can now find the empirical formula.
Element - mass - Mr - Mass÷Mr - Ratio - Simplest Ratio
Fe - 7.77g - 55.8 - [7.77÷55.8] - [0.14÷0.05] - 2.8 = 3
P - 1.44g - 31 - [1.44÷31] - [0.05÷0.05] - 1
O - 2.96g - 16 - [2.96÷16] - [0.19÷0.05] - 3.8 = 4
[The simplest ratio was obtained by dividing the answer of mass÷mr with the smallest value. Phosphorus had the smallest value of mass÷mr=0.05, so all other answer were divided by 0.05]
Emperical formula = Fe₃PO₄
WILL GIVE BRAINLIEST
Which model provides more information-a chemical formula or a sketch of the molecule
like in the structural formula? Explain your reasoning.
Answers
Answer:
Explanation
:Both b/c a chemical formula tells you how many and a sketch formula shows how they are bonded together.
Molecular formulas show how many atoms of each element one molecule of a compound contains. Note: Ionic compounds are generally crystalline solids with high melting points. Other compounds, however, have very different properties.
Identify and name the global
wind belts.
A
B
C
D
E
F
G
Answers
Answer:
A. Polar Easterlies
B. Westerlies
C. Northeast Trades
D. Southeast Trades
E. Westerlies
F. Polar Easterlies
G. Hadley cell
Explanation:
I am pretty sure this is right. Hope that helps
help me please i don’t understand this
Answers
There you go :) just reword it and try make it into your own words like just switch some sentences around
Determine the mass of 10g of CaCO3
Answers
Answer:
= 100u. Hence 10 g = 0.1 mole. Hope it's helpful to u
When carrying out a liquid-liquid extraction using a separatory funnel, Group of answer choices the bottom layer, which always contains the organic product, is always removed first. the organic layer must always be dried with an anhydrous salt like MgSO4. separation of layers is most efficient when the separatory funnel is drained with the top on. the top layer is always removed first with a disposable pipet.
Answers
When carrying out a liquid-liquid extraction using a separatory funnel the organic layer must always be dried with an anhydrous salt like MgSO4.
What is Liquid-liquid extraction?This is defined as a method of separation of compounds based on their relative solubilities in two different immiscible liquids.
The organic layer must always be dried with an anhydrous salt like MgSO4 to remove the water content for a more accurate result.
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sweating to cool off on a hot day is an example of
1.nutrition
2.regulation
3.digestion
4.biology
Answers
Answer:
Regulation
Explanation:
Your body regulates its body temperature in many ways: sweating, homeostasis etc.
:quilibrium:
1. Define equilibrium when the equation
Use the equation below to answer the following equilibrium questions:
H₂O (g) + CO (g) =H₂(g) + CO₂(g) + 42 KJ
2. In the reaction above, what could happen that causes the equilibrium to shift to the right?
3. In the reaction above, what could happen to cause the equilibrium to shift to the left?
4. If pressure was increased, what direction would equilibrium shift?
5. If heat was added, what direction would equilibrium shift. What would happen to the concen
6.
If CO was added, what direction would equilibrium shift. What would happen to the concent
chiometry:
the following equation to answer the questions that follow:
Answers
Equilibrium is a state in a chemical reaction where the rate of the forward reaction is equal to the rate of the reverse reaction, resulting in no net change in the concentrations of reactants and products. It is represented by a double arrow (⇌) in chemical equations. In the given equation: H₂O (g) + CO (g) ⇌ H₂(g) + CO₂(g) + 42 KJ
To shift the equilibrium to the right, one or more of the following could occur:
Increasing the concentration of H₂ or CO₂
Decreasing the concentration of H₂O or CO
Increasing the pressure
Removing some of the products (H₂ and CO₂)
Decreasing the temperature
To shift the equilibrium to the left, one or more of the following could occur:
Decreasing the concentration of H₂ or CO₂
Decreasing the pressure
Increasing the temperature
If pressure is increased, the equilibrium will shift in the direction that produces fewer moles of gas. In this case, since there are fewer moles of gas on the right side of the equation (H₂ and CO₂), the equilibrium will shift to the right. If heat is added, the equilibrium will shift in the endothermic direction to absorb the additional heat. In this case, the forward reaction is endothermic (42 KJ on the right side), so the equilibrium will shift to the right to consume the added heat.
If CO is added, the equilibrium will shift to the right to consume the additional CO.The concentration of H₂O and CO₂ will increase, while the concentrations of H₂ and CO will decrease until a new equilibrium is reached.
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Question 2 (1 point)
Which state of matter has the lowest density and the highest energy?
Answers
Hope this helps! ☺️
how many valence electrons does silicone have?
Answers
Answer:
four valence electrons
Explanation:
determine whether each pair of chemicals could be separated by an acid or base extraction.
Answers
Acetone (CH3COCH3) and water (H2O) can be separated by acid extraction.
Sodium chloride (NaCl) and acetic acid (CH3COOH) cannot be separated by an acid or base extraction.
Acetone and water can be separated by an acid extraction because acetone is a non-polar solvent and water is polar. An acid can be used to protonate acetone, making it more polar and allowing it to be separated from the water.
Sodium chloride and acetic acid cannot be separated by an acid or base extraction because they are both neutral and have no ionizable hydrogen atoms. Acid-base extractions rely on the ionization of hydrogen atoms, so they cannot be used to separate neutral compounds. In this case, other methods such as distillation or crystallization would be necessary to separate these two compounds.
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The complete question is-
Determine whether each pair of chemicals could be separated by an acid or base extraction pairs are: Acetone (CH3COCH3) and water (H2O); Sodium chloride (NaCl) and acetic acid (CH3COOH)
A coiled spring with coils that are closely spaced then widely then closely then widely then closely, ending with a yellow line labeled 1 second. What is the frequency of this wave?
Answers
Answer:
The frequency of the wave is 2Hz.
Explanation:
The frequency of a wave is the number of waves that pass a fixed point in a given amount of time. It can be measured by counting the number of crests that pass the point in a given time period. The higher the number is, the greater is the frequency of the wave.
So, by counting the number of times the coils in the spring are widely spaced, which is 2 times in 1 second, we get the frequency of the wave.
Answer:
The answer is 2.
Explanation:
Hope this helps ;)
Does anyone have the chemistry paper 1 higher 2019 mark scheme thank you
Answers
no
Explanation:
i simply answered the question
you didnt ask for it you simply asked if i had it
being mad is no use, same with reporting and taking this down
in thoery my answer is correct
so, dont get mad, dot report, dont take this down
this is my protest
The concentration f the sugar glucose (c6h12o6) in human blood ranges from 80 mg/dl before meals up to 120 mg/dl after eating. find the molarity of glucose in blood before eating. remember 1 dl = 0.1l
Answers
The molarity of glucose in blood before eating is 0.00666 M
Molar concentration is the degree of the concentration of a chemical species, especially of a solute in a solution, in phrases of quantity of a substance per unit quantity of answer. In chemistry, the most usually used unit for molarity is the variety of moles in line with liter.
We are given the human blood ranges from about 80 mg/dL before meals to 120 mg/dL after eating.
1 dL = 0.1 L
Mass of glucose before meal = 80 mg = 0.080 g
Mass of glucose after eating = 120 mg = 0.120 g
So, moles of glucose = 0.080 g / 180.16 g/ mol
= 0.000444 moles
Moles of glucose = 0.120 g / 180.16 g/mol
= 0.000666 moles
So, molarity of glucose in blood before eating = 0.000444 moles / 0.1 L
= 0.00444 M
molarity of glucose in blood after eating = 0.000666 moles / 0.1 L
= 0.00666 M
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advantages of soapy detergents
Answers
Answer:
Soapy detergents clean more effectively than normal soap. Hard water (water with high mineral content). Hard water can be used with soapy detergents but soap cannot be used with hard water. When soapy detergent and hard water are combined it makes a protective film that is really resistant to rinsing.
Have a good day.
You have a 2.50 gram sample of potassium permanganate. How many moles of potassium permanganate are in your sample?
a. 0.016 mols
b. 158.04 mols
c. 15.8 mols
d. 63.22 mols
Answers
The number of moles of potassium permanganate in 2.5 grams of the solution is 0.016moles (option A).
How to calculate number of moles?The number of moles of a substance is amount of the substance of a system which contains exactly 6.02214076 × 10²³ atoms or molecules.
The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass as follows:
no of moles = mass ÷ molar mass
According to this question, there are 2.50 grams sample of potassium permanganate. The molar mass of potassium permanganate is 158.034 g/mol.
no of moles = 2.5g ÷ 158.034g/mol
moles = 0.016moles
Therefore, 0.016moles are in 2.5 grams of the solution.
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Considering the definition of molar mass, the correct answer is option a. 0.016 moles of potassium permanganate are in the sample
Definition of molar massThe molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.
The molar mass of a compound is the sum of the molar mass of the elements that form it multiplied by the number of times they appear in the compound.
Molar mass of potassium permanganateIn this case, you know the molar mass of the elements is:
K= 39.1 g/moleMn= 54.94 g/moleO= 16 g/moleSo, the molar mass of the compound KMnO₄ is calculated as:
KMnO₄= 39.1 g/mole + 54.94 g/mole + 4× 16 g/mole
Solving:
KMnO₄= 158.04 g/mole
Moles of 2.50 grams of KMnO₄You can apply the following rule of three: If by definition of molar mass 158.04 grams of the compound are contained in 1 mole, 2.50 grams are contained in how many moles?
amount of moles= (2.50 grams× 1 mole)÷ 158.04 grams
mass= 0.016 moles
Finally, there are 0.016 moles.
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How would one convert 5 decades to months (1 decade = 10 years)?
Answers
Answer:
A decade is 10 years. Therefore you must first multiply ten by five to get 50. After you multiply the 12 months in a year by the 50 years. Your answer should be 600
Explanation:
Answer:its d
Explanation:just took it
PLEASE HELP!!!!!
Calcium hydroxide is _____.
an acid
a base
a neutral
Answers
2. A tow-line with a tension of 1200 N at 35° is needed to tow the 1350 kg
trailer at a constant speed. What is the uk?
Answers
Answer:
i don't know
sorry i would help but i don't know
Explanation: