The partial pressure of Ar is 356.04 mm Hg (= 0.4685 atm)
What exactly is the partial pressure law?According to Dalton's law of partial pressures, each gas in a mixture exerts the same amount of pressure as it would if it were the only one in the container.
Briefing:
Given ,a mixture of three gases has a total pressure of 1380 mm Hg (=1.81579 atm) at 298 K
Moles of CO2 = 1.27 moles
Moles of CO = 3.04 moles
Moles of Ar = 1.50 moles
Calculate total number of moles
Total number of moles = n(CO2)+ n(CO)+ n(Ar) = 1.27 mol+ 3.04 mol+ 1.50 mol = 5.81 moles
Calculate mol fraction Ar
Mol fraction Ar = 1.50 mol/5.81 mol = 0.258
Calculate partial pressure
1380 mm Hg * 0.258 moles Ar = 356.04 mm Hg = 0.4685 atm
The partial pressure of Ar is 356.04 mm Hg (= 0.4685 atm)
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g aqueous hydrobromic acid will react with solid sodium hydroxide to produce aqueous sodium bromide and liquid water . supposed 4.05 g of hydrobromic acid is mixed with 3.7 g of sodium hydroxide. calculate the maximum mass of sodium bromide that could be produced by the chemical reaction. be sure your answer has the correct number of significant digits.
The maximum mass of sodium bromide that can be produced in this reaction is 4.05 g. So, the correct answer is option C.
This is because the limiting reagent, or the reagent with the least amount, is the hydrobromic acid, which has a mass of 4.05 g.
HBr + NaOH → NaBr + H2O is the reaction equation for this reaction. The total mass of the products and reactants must be equal in order for the rule of conservation of mass to apply.
Since hydrobromic acid has a mass of 4.05 g, the maximum mass of sodium bromide that can be produced is the same.
This quantity of sodium bromide is created when both reactants are used up entirely in the reaction and none are left behind.
Complete Question:
A aqueous hydrobromic acid (HBr) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H2O). If 4.05 g of hydrobromic acid is mixed with 3.7 g of sodium hydroxide, what is the maximum mass of sodium bromide that could be produced by the chemical reaction?
A. 2.75 g
B. 3.7 g
C. 4.05 g
D. 4.75 g
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why was cacl2 used and not nacl in the preparation of macrocapsule?
The reason why CaCl2 is used and not NaCl in the preparation of macrocapsules is due to the difference in solubility. Calcium chloride is a salt that is soluble in water, whereas sodium chloride is also soluble in water, but less so than calcium chloride.
A macrocapsule is a type of capsule that is large enough to be seen with the unaided eye. It is also known as a "large capsule." Macrocapsules are usually used in the medical industry to deliver drugs or other substances to specific parts of the body. The substance to be delivered is typically contained within the capsule, which is then implanted into the body.
In order to prepare macro-capsules, a process known as microencapsulation is used. During this process, the substance to be encapsulated is suspended in a solution, and then this solution is mixed with a polymer. The polymer hardens around the substance, creating a capsule that can be implanted into the body.
In the preparation of macro-capsules, CaCl2 is used instead of NaCl because of its solubility. Calcium chloride is highly soluble in water, which makes it ideal for use in the microencapsulation process. The solubility of CaCl2 allows for the formation of a hard, impermeable capsule that is able to protect the substance inside from the surrounding environment. On the other hand, NaCl is less soluble in water than CaCl2, which makes it unsuitable for the microencapsulation process.
Other factors which make CaCl2 suitable for macrocapsule preparation include:
Gel formation: CaCl2 can participate in gel formation reactions with certain polymers or gelling agents. It can crosslink polymers, resulting in the formation of a stable gel structure, which can be useful for encapsulating materials and providing mechanical stability to the macro-capsules.
Compatibility: The specific material being encapsulated or the application of the macrocapsules may require compatibility with CaCl2 rather than NaCl. For example, certain biological or chemical processes may be more compatible with CaCl2 as a component of the encapsulation system.
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Which of the following is true regarding disulfide bridges?
Answer:
i don't see the options below..
Disulfide bridges are covalent bonds formed between two sulfur atoms in different cysteine residues within a protein. They play a crucial role in stabilizing the tertiary and quaternary structure of proteins.
The correct statement regarding disulfide bridges is:
Disulfide bridges contribute to the structural stability and integrity of proteins. These bonds form between the sulfur atoms of two cysteine residues, resulting in a strong covalent linkage. The formation of disulfide bridges occurs through an oxidation reaction, where two cysteine thiol groups (-SH) oxidize to form a disulfide bond (-S-S-). This covalent linkage helps to maintain the correct folding and shape of proteins, as well as provide resistance to denaturation under various conditions. Disulfide bridges are important for maintaining the structural stability of proteins and are formed by the oxidation of cysteine residues. Their presence allows proteins to maintain their proper conformation and function, contributing to their overall stability and functionality in biological systems.
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Should I use flex seal to clean a baby
O yes
O no
O fish are wet birds
O penguins are to dumb to fly
Using the Language of Science prefix and suffix lists, figure out the meanings of the following words:
Example: cardiology – heart study or science (study of the heart)
Osteocyte-
Dermatitis-
Epidermis-
Hematology-
Neuritis-
Protozoa-
Polysaccharide-
Macronutrients-
Intracellular-
Carnivore-
Based on the Language of Science prefix and suffix lists, the meanings of the following words are:
Osteocyte - bone cell (osteo- means bone and -cyte means cell)Dermatitis - skin inflammation (derma- means skin and -itis means inflammation)Epidermis - outer layer of skin (epi- means on top of and -dermis means skin)Hematology - study of blood (hema- means blood and -ology means study of)Neuritis - nerve inflammation (neuri- means nerve and -itis means inflammation)Protozoa - single-celled microorganisms (proto- means first or primitive and -zoa means animals)Polysaccharide - complex carbohydrate made up of many sugar units (poly- means many and -saccharide means sugar)Macronutrients - nutrients required in large amounts by organisms (macro- means large and -nutrient means food substance)Intracellular - located or occurring within a cell (intra- means within and -cellular means relating to cells)Carnivore - an animal that feeds on flesh (carni- means flesh and -vore means eater)What are polysaccharides?Long-chain polymeric carbohydrates known as polysaccharides are made up of monosaccharide units joined by glycosidic bonds.
Osteocytes are cells that make up the bone's mineralized tissue.
Macronutrients, often known as fat, protein, and carbohydrates, are the nutrients we require in greater amounts to give us energy.
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For the molecule COBr2 Upload the correct Lewis structure (including resonance forms, if com to the PL What is the geometry of the molecule? Is it polar or non-polar? What is the hybridization of the central atom?
COBr2 is polar in nature and prefers to dissolve in polar solvents like water, ethanol, and methanol, among others, cobr2 is soluble in polar solvents.
Which way does Cobr2 polarize?Because cobr2 is polar in nature and prefers to dissolve in polar solvents like water, ethanol, and methanol, among others, cobr2 is soluble in polar solvents.Lewis structures use a 2D representation to show where the electrons are placed, whereas molecular geometry only uses 3 dimensions when the bond atoms are present (whether its lone-pair or atom).Given that COBr2 has a double bond, we anticipate that the Br-C-Br and Br-C-O angles will be only slightly above and below 120 degrees, respectively.To learn more about polar solvents refer to:
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KHP, the acid used in this experiment,
stands for potassium hydrogen
phosphorous.
True
False
Answer:
false
Explanation:
standard form is Potassium hydrogen phthalate
What will happen to the size of the population if the number of individuals that are added is close to the number of individuals that are removed?
We can see here that if the number of individuals that are added to a population is close to the number of individuals that are removed, the population size will generally remain relatively stable. This is because the rate of population growth is balanced by the rate of population decline.
What is population?Population refers to a group of individuals of the same species that inhabit a particular geographic area and can potentially interbreed. In the context of biology and ecology, population is a fundamental concept that helps describe and understand the dynamics of living organisms.
A population can refer to a wide range of organisms, including animals, plants, or microorganisms, and it is often characterized by its size, density, distribution, and composition.
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Which phenomenon occurs when the Sun crosses the plane of Earths equator?
In what way do the atoms in the same row of the Periodic Table increase from left to right?
Answer:
As you move from left to right, the nucleus gains protons. This increases the positive charge of the nucleus and its attractive force on the electrons. At the same time, electrons are added to the atoms as you move from left to right across a period.
Explanation:
Combustion is an _____ process that requires the interaction of fuel with a(n) _____ agent.
An exothermic process called combustion necessitates the interaction of fuel with a reducing agent.
What is Combustion ?An object quickly reacts with oxygen in the chemical process of burning to produce heat. Fuel and oxygen's source are the terms used to describe the original substance. Although fuel for aeroplane propulsion is normally a liquid, it can also be a solid, liquid, or gas.
The combustion process is typically divided into three stages: Combustion with a regulated pace, premixed combustion, and delayed ignitionThe cycle is composed of four distinct processes: intake, compression, combustion and power stroke, and exhaust. Fuel is supplied and ignited differently in gasoline engines with spark ignition compared to diesel engines with compression ignition.Learn more about Combustion here:
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Which of the following units are commonly used in chemistry? A Kelvin b ampere c fluid ounce d kilogram
Explanation:
your answer is Kelvin because it is the SI unit of temperature
witch substance exhibits metallic bonding in the solid state
Answer:
Explanation:
When in a solid state, the substances that exhibit metallic bonding include metals, metal alloys, and some metalloid elements. Metals always form metallic bonds when bonding to other metal atoms.
In a chemical formula,
Like magnesium oxide, Mg0
Why we write Mg charge +2 and 0 charge -2 and then solve it.
We could write like Mg +2 and 02 -2?
This means that in one molecule of magnesium oxide, there is one magnesium cation with a charge of +2 and one oxygen anion with a charge of -2.
What is meant by chemical formula?In a chemical formula, numbers written after the symbol of each element indicate number of atoms of that element present in one molecule of the compound. To determine the overall charge of the compound, we need to take into account the charges of the individual atoms.
In the case of magnesium oxide (MgO), magnesium is metal and tends to lose two electrons to form cation with a charge of +2 and oxygen is a nonmetal and tends to gain two electrons to form anion with charge of -2. This means that in one molecule of magnesium oxide, there is one magnesium cation with charge of +2 and one oxygen anion with a charge of -2.
If we were to write chemical formula as Mg⁺² and O₂⁻², this would imply that there are two oxygen anions, each with a charge of -2. However, in magnesium oxide, there is only one oxygen atom, and therefore, we need to write the chemical formula as MgO to correctly represent the composition of the compound.
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The car has a rechargeable battery to drive it’s motor. The rechargeable battery provided a potential difference of 330 volts and can store up to 64 mega Jules it takes 8 hours for the battery to receive a full charge assume that the charging process is 100% efficient calculate the total charge the flows while the battery is being charged
The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.
To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.
The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):
E = V * Q
Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):
Q = E / V
Substituting the given values, we have:
Q = 64 MJ / 330 V
To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:
Q = (64 * 10^6 J) / 330 V
Calculating the division:
Q ≈ 193,939.39 Coulombs
Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.
This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.
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Which solution should she put in the What should Maria do to keep safe as she carries out her experiment?
To ensure safety while carrying out her experiment, Maria should follow proper laboratory protocols and take necessary precautions like handle equipment and glassware carefully,wear appropriate personal protective equipment (PPE),read safety data sheets (SDS) to understand the proper handling,never work alone in the laboratory,etc.
Here are some recommendations:
1.Wear appropriate personal protective equipment (PPE), including safety goggles, lab coat, and gloves, to protect her eyes, body, and hands from potential hazards.
2.Familiarize herself with the properties and potential risks associated with the chemicals she will be working with. Read safety data sheets (SDS) to understand the proper handling, storage, and disposal procedures.
3.Work in a well-ventilated area or use a fume hood to minimize exposure to any fumes or gases that may be generated during the experiment.
4.Handle equipment and glassware carefully to prevent accidents or breakages. Ensure that all equipment is in good condition and appropriate for the experiment.
5.Follow proper techniques for measuring, mixing, and transferring chemicals to prevent spills or splashes. Use appropriate containers and labels to clearly identify and store chemicals.
6.Be aware of emergency procedures, including the location of safety equipment such as fire extinguishers, eyewash stations, and emergency showers.
7.Never work alone in the laboratory. Inform a supervisor or lab mate about the experiment and maintain communication throughout the process.
By following these safety measures, Maria can minimize risks and ensure a safe working environment during her experiment.
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2 nh3 fe(oh)2 n2h4 fe 2 h2o in the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.
Fe(oh) is a oxidizing agent, while water is a reducing agent.
What is the oxidizing substance in the reaction Fe3+ V Fe V3+?V2+ is oxidized into V3+ while Fe3+ is reduced to Fe2+. This occurs because the reduced species receives electrons while the oxidized species loses electrons. Vanadium loses one electron (V2+ V3+), while iron acquires one (Fe3+ Fe2+). As a result, V2+ is the reducing agent while Fe3+ is the oxidizing agent.
How can you know whether a redox process is an oxidation or reduction?By assuming that all bonds to the atoms in molecules are ionic, we may use the oxidation numbers that are assigned to them to detect redox reactions. In a reaction, oxidation is shown by an increase in the number of oxidations, while reduction is indicated by a drop.
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how many oxygen molecules are in 5.17g of oxygen gas
Answer:
is cool is cool goodcripopo
3 Cu + 8HNO3 g 3 Cu(NO3)2 + 2 NO + 4 H2O
In the above equation how many moles of NO can be made when 27 moles of HNO3 are consumed?
Considering the reaction stoichiometry, the amount of moles of NO that is produced when 27 moles of HNO₃ react is 6.75 moles.
Reaction stoichiometryThe balanced reaction is:
3 Cu + 8 HNO₃ → 3 Cu(NO₃)₂ + 2 NO + 4 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Cu: 3 moles HNO₃: 8 moles Cu(NO₃)₂: 3 moles NO: 2 moles H₂O: 4 molesAmount of moles of NO producedIt is possible to determine the the amount of moles of NO produced by a rule of three: if by stoichiometry 8 moles of HNO₃ produce 2 moles of NO, if 27 moles of HNO₃ react how many moles of NO will be formed?
\(amount of moles of NO=\frac{27 moles of HNO_{3} x 2 moles of NO}{8 moles of HNO_{3}}\)
amount of moles of NO= 6.75 moles
In summary, the amount of moles of NO that is produced when 27 moles of HNO₃ react is 6.75 moles.
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2.60x1023 molecules of hexane (C6H14) and 7.00x1023 molecules of O2 are available for a combustion reaction. Theoretically, how many molecules of water can be produced?
The first step is to write the combustion reaction of hexane:
\(\begin{gathered} 2C_6H_{14}+19O_2\rightarrow12CO_2+14H_2O \\ \end{gathered}\)Now, we can use Avogadro's Number to find the amount of moles of hexane and O2 that are reacting:
\(\begin{gathered} 2.60\times10^{23}molecules\cdot\frac{1mol}{6.023\times10^{23}molecules}=0.43molC_6H_{14} \\ 7.00\times10^{23}molecules\cdot\frac{1mol}{6.023\times10^{23}molecules}=1.16molO_2 \end{gathered}\)Using the stated reaction we can determine the amount of moles of O2 that react with 0.43 moles of hexane:
\(0.43moles\cdot\frac{19molesO_2}{2molesC_6H_{14}}=4.085molesO_2\)From this we can conclude that the limiting reactant is the O2, which means that we have to use the amount of O2 to make the calculations. Use this amount and the stoichiometric ratio of O2 and H2O to find the amount of water produced from 1.16moles of oxygen:
\(1.16molO_2\cdot\frac{14molH_2O}{19molO_2}=0.85molesH_2O\)Now, we can use Avogadro's number to convert the amount of moles produced to molecules:
\(0.85molesH_2O\cdot\frac{6.023\times10^{23}moleculesH_2O}{1molesH_2O}=5.12\times10^{23}moleculesH_2O\)It means that 5.12x10^23 molecules of water are produced.
CH3CH2OH+3O2 2CO2+3H20 ( ethanol) explain this equation! if u didn't understand the wat I have written could u text in personal will sent u photo of questions
The equation is given is of combustion of ethanol.
Fuel ethanol (C2H5OH) has high energy carbon-carbon (C-C) and carbon-hydrogen (C-H) bonds that store chemical energy. From the ethanol container, ethanol molecules evaporating, enter the flame's base. A physical action called evaporation converts liquid into gas. Ethanol evaporates with a constant molecular structure.
The molecules of ethanol and oxygen combine inside the flame and undergo a chemical transformation. Let's consider matter, or the atoms. The oxygen (O2) and ethanol (C2H5OH) molecules' atoms reorganise into carbon dioxide (CO2) and water (H2O). There are always the same number of atoms. A chemical equation may be used to demonstrate how the atoms are rearranged.
Energy is released as the atoms in the oxygen and ethanol are rearranged. When the high-energy C-C and C-H bonds in ethanol are swapped out for the low-energy H-O and C=O bonds in carbon dioxide and water, chemical energy is released as heat and light.
The ethanol and oxygen atoms are rearranged into carbon dioxide and water during burning. Water and carbon dioxide escape from the flame's top.
To conclude with we can say that the given reaction of combustion of ethanol. Ethanol with oxygen given carbon dioxide with water on reaction.
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In a coffee cup calorimeter, 50.0 mL of 1.00 M CuSO₄(aq) combines with 50.0 mL of 2.00 M KOH(aq). When the two solutions are mixed, a precipitate forms. Temperature rises from 21.5°C to 27.7°C. Write a net ionic equation for this precipitation reaction to help you visualize the change. Use calorimetry data to find the ΔH for this reaction in kJ per mol of copper(II) sulfate which reacted. Include the proper sign. Assume that density of solution and specific heat of solution are that of pure water.
The net ionic equation can be written as -
Cu²⁺ (aq) + OH⁻ (aq) = Cu(OH)₂(s) and the ΔH for the reaction is
-0.207kJ/mole.
The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It represents the amount of heat necessary to raise the mass of one gram of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
The net ionic equation can be written as -
Cu²⁺ (aq) + SO₄²⁻(aq) + K⁺ (aq) + OH⁻ (aq) = Cu(OH)₂(s) + K⁺ (aq) + SO₄²⁻(aq)
Cancelling the ions that are common on both the sides of the equation we get,
Cu²⁺ (aq) + OH⁻ (aq) = Cu(OH)₂(s)
Volume of CuSO₄ = 50ml
Concentration of CuSO₄ = 1 M
Volume of KOH = 50ml
Concentration of KOH = 2 M
Number of moles of CuSO₄ = 0.050 moles
Number of moles of KOH = 0.1 moles
Moles of CuSO₄ reacted = 0.1 - 0.05 = 0.05 moles
Mass of CuSO₄ = 0.05 × 160 = 8 g
Q = mc ΔT
= 8 × 4.186 × ( 27.7 - 21.5 )
= 207.62 J = 0.207 kJ/mole
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Diffusion is a type of active transport
Answer:
True
Explanation:
Diffusion is an active process that requires a cell to expand a great deal of energy. ... Diffusion through ion channels is a form of active transport. False. Passive transport uses ATP to move molecules against their concentration gradient.
Why do ionic compounds need to reach stability in their charges?
Answer:
Ionic compounds need to reach stability in their charges because they are composed of ions, which are atoms or molecules that have gained or lost electrons. The positive and negative charges within an ionic compound must balance out in order to achieve stability. If the charges are not balanced, the compound will be unstable and will tend to react with other ions or molecules in an attempt to reach a state of stability. This is why ionic compounds form crystal lattices, with each ion arranged in a specific position in the lattice so that the positive and negative charges are evenly balanced.
Explanation:
Tell me if you still confuse
ALLEN
How many sp
3
carbons are in CH
3
CH
2
CHCHC(CH
3
)
3
? It will help if you draw out the compound.
The compound CH₃CH₂CHCHC(CH₃)₃ contains one SP³ carbon atom.
The compound CH₃CH₂CHCHC(CH₃)₃ contains one SP³ carbon atom.
Here is the structure of the compound:
H
|
H - C - C - C - C - C(CH₃)₃
|
H
In this structure, the carbon labeled as "C" is an SP³ carbon atom.
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Which of the following nuclides is predicted to be the most stable based on its nuclear binding energy?
Based on its nuclear binding energy, the most stable nuclide is the one with the highest binding energy per nucleon. Among the given nuclides, the one with the highest nuclear binding energy is predicted to be the most stable.
Please note that nuclear stability is also influenced by factors like neutron-to-proton ratio and the presence of magic numbers, which provide extra stability. However, for this specific question, focusing on nuclear binding energy is sufficient. In conclusion, the nuclide with the highest nuclear binding energy is predicted to be the most stable.
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Classify each substance as a strong acid, strong base, weak acid, or weak base. Drag the appropriate items to their respective bins NH3 HCOOH KOH CSOH CH3NH2 HF (CH3)2NH HI CH COOH HCIO Strong acids:Weak acids: Strong bases:Weak bases:
The given substances are listed as follows strong acids as HCIO, HI; weak acids as \(CH_3COOH\), \(CH_3NH_2\), HCOOH, HF; strong bases as KOH, CSOH and weak bases as \(NH_3(CH_3)_2NH\).
Substances are classified into four types strong acids, weak acids, strong bases, and weak bases.
Strong acids: Strong acids are acidic substances that have high ionization capacity. These acids are said to be strong acids because they have a pH of less than 7.0. HCl, \(H_2SO_4\), and \(HNO_3\) are examples of strong acids.Weak acids: Weak acids are acidic substances that have a low ionization capacity. These acids are said to be weak acids because they have a pH of greater than 7.0. \(CH_3COOH, CH_3NH_2,\) HCOOH and HF are examples of weak acids.Strong bases: Strong bases are basic substances that have a high degree of ionization capacity. These bases are said to be strong bases because they have a pH of greater than 7.0. NaOH, KOH, and \(Ca(OH)_2\) are examples of strong bases.Weak bases: Weak bases are basic substances that have a low degree of ionization capacity. These bases are said to be weak bases because they have a pH of less than 7.0. \(NH_3\) and \((CH_3)_2NH\) are examples of weak bases.Learn more about strong acids: https://brainly.com/question/30900251
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Which of the following describes a disconfirmed hypothesis?
it has been proven true
it has been poorly written and needs to be reformed
it has been proven false
it is not testable
imagine you are frosting a cake apply pascal's law to using the bag of frosting what would happen when you squeeze the bag
is kcn a ternary ionic compound?
Answer:
The given molecule is KCN.
Is it a ternary ionic compound?
Explanation:
A ternary ionic compound is one that consists of at least one polyatomic ion/radical.
In the given molecule,
the ions present are:
K+ and CN-.
CN- is a polyatomic acidic radical.
Hence, the given molecule is ternary ionic compound.