The IUPAC name for C11H21+2OH is dodecan-2-ol, which is an alkanol with 12 carbon atoms and 2 hydroxyl (OH) groups.
What is IUPAC name?IUPAC stands for International Union of Pure and Applied Chemistry. It is an international scientific body that sets standards for the naming of chemical substances. The IUPAC name of a substance is based on the molecular structure of the chemical, and includes information about the type and number of atoms, the number of bonds, and the various functional groups present in the molecule. It is the most precise and systematic way to name a chemical substance.
The name is derived from the prefix “dodeca-” which refers to the 12 carbon atoms, and the suffix “-2-ol” which refers to the 2 hydroxyl groups.
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what is the oxidation number of each oxygen atom in hooh?
Answer:(-1)
Explanation: Assuming HOOH has a neutral charge, hydrogen is always a +1 charge. In order to make it neutral each oxygen would have a charge of an oxidation number of -1
the ∆hf for br(g) is 193 kj/mol. what is the bond dissociation energy of a br-br bond?
The bond dissociation energy of a Br-Br bond is approximately 288.8 kJ/mol.
In order to calculate the bond dissociation energy (BDE) of a Br-Br bond, we can use the following relationship:
BDE(Br-Br) = 1/2 ∆Hf(Br₂)
Where ∆Hf(Br₂) is the standard enthalpy of formation of Br₂ gas.
We are given that
∆Hf(Br(g)) = 193 kJ/mol.
However, we need to find ∆Hf(Br₂),
which is the enthalpy of formation of Br₂ gas, not Br gas.
By combining the enthalpy of atomization of Br₂ gas with the bond dissociation energy of a Br-Br bond, the standard enthalpy of production of Br₂ gas can be calculated.
The energy needed to dissolve the Br-Br link in the diatomic molecule and transform the two Br atoms into gaseous atoms is known as the enthalpy of atomization of Br₂ gas.
According to accepted references, this value is 192.8 kJ/mol.
So, we have:
∆Hf(Br₂) = 1/2 BDE(Br-Br) + 1/2 (enthalpy of atomization of Br₂ gas)
193 kJ/mol = 1/2 BDE(Br-Br) + 1/2 (192.8 kJ/mol)
Solving for BDE(Br-Br), we get:
BDE(Br-Br) = 2(193 kJ/mol - 0.5 x 192.8 kJ/mol)
BDE(Br-Br) = 385.2 kJ/mol - 96.4 kJ/mol
BDE(Br-Br) = 288.8 kJ/mol
Therefore, the bond dissociation energy of a Br-Br bond is approximately 288.8 kJ/mol.
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why does hydrogen peroxide decomposes into water and oxygen?
Hydrogen peroxide decomposes into water and oxygen because it is a relatively unstable compound, and the decomposition reaction is exothermic, meaning that it releases energy.
Hydrogen peroxide is a compound made up of hydrogen and oxygen atoms, with the chemical formula H₂O₂. It is a relatively unstable compound and can break down into water and oxygen spontaneously. This decomposition reaction can be accelerated by the presence of catalysts such as heat, light, or certain metals.
The decomposition reaction of hydrogen peroxide is exothermic, meaning that it releases energy in the form of heat and light. This energy release can be observed as bubbles of oxygen gas form and escape from the liquid, while the remaining liquid turns into water.
The chemical reaction for the decomposition of hydrogen peroxide is as follows,
2H₂O₂ (hydrogen peroxide) → 2H₂O (water) + O₂ (oxygen)
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Creating a mixture is causing a ?
Answer:
chemical reaction between two reagents basically
for this question, choose three answers. what are the possible molar ratios for h3po4?
According to the chemical formula of phosphoric acid the three possible molar ratios are 3:1:4, 1:3:4 or 4:1:3.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
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what is silicon dioxide formula
SiO2 is the chemical name for silicon dioxide. One silicon atom and two oxygen atoms make up the compound. One of the most prevalent minerals in the Earth's crust, it is also known as silica or quartz.
One silicon atom and two oxygen atoms combine to form silicon dioxide, often known as silica or quartz. It is one of the most common minerals in the crust of the Earth, accounting for around 59% of the crust's weight. Due to its distinct physical and chemical characteristics, including as its hardness, high melting point, and resistance to chemical reactions, it has a wide range of uses. It is employed in a number of sectors, including the manufacture of glass, ceramics, and electronics. It is a crucial part of many living species and may be found in many natural materials including sand, rocks, and soil. Nevertheless, continuous exposure to tiny silicon dioxide particles might result in respiratory issues such
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3. Why is it nearly impossible to get rid of the lionfish from their new territory?
According to NOAA experts, invasive lionfish populations will keep expanding and cannot be controlled by traditional means.
What is lionfish ?A marine species known as a "lionfish" has stripes that resemble zebra stripes and is typically red, brown, and white. In their non-native area, there are two different but outwardly identical species, however around 97 percent of them are red lionfish.
Regrettably, NOAA scientists have determined that invasive lionfish populations will keep expanding and cannot be controlled by traditional means.
Thus, They are predators that eat tiny crustaceans and juvenile fish, including snapper and grouper, two important commercial fish species.
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Which is not a disadvantage of hydrogen as a fuel?
A. The difficulty of obtaining free hydrogen gas
B. The large size of fuel tanks needed to store hydrogen gas
C. The volatility of hydrogen gas
D. The lack of an infrastructure to transport hydrogen gas
E. The scarcity of water in which electrolysis can be conducted
The scarcity of water in which electrolysis can be conducted is not a disadvantage of hydrogen as a fuel. Option E is correct answer.
Electrolysis is a process that uses an electric current to split water molecules into hydrogen and oxygen gases, and it is one of the methods used to produce hydrogen for use as fuel. However, the availability of water is not considered a significant limitation for hydrogen production since water is a widely available resource on our planet.
On the other hand, options A, B, C, and D are all considered disadvantages of hydrogen as a fuel, as obtaining free hydrogen gas, storing it in large tanks, its volatility, and the lack of infrastructure for transporting it are all significant challenges that must be addressed to make hydrogen a more practical fuel source. Therefore, option E is correct answer.
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How do you remember amino acid abbreviations?
There are numerous methods for remembering amino acid abbreviations. Here are some pointers:
Employ flashcards, Make a mnemonic, Employ visual aids, Regular practise.
Employ flashcards: Put the amino acid's abbreviation and full name on one side of a flashcard and its chemical structure on the other. This will assist you in associating the abbreviation with the full name as well as the chemical structure of the amino acid.
Make a mnemonic: Come up with a word or phrase that will help you remember the first letter of each amino acid abbreviation. "Goodness gracious, always have fast cars, get speed tickets," for example, can aid in remembering the initial letters of the amino acids Glycine, Alanine, Histidine, Phenylalanine, Cysteine, Glutamic acid, Aspartic acid, Glutamine, Serine, and Threonine.
Employ visual aids: Match each amino acid abbreviation with an image that illustrates the full name or the amino acid's qualities. For example, "C" (Cysteine) corresponds to a cyst, "G" (Glycine) corresponds to a jelly bean, and "W" (Tryptophan) corresponds to a waffle.
Regular practise: The more you do it, the easier it will be to memorise amino acid abbreviations. While learning amino acids, test yourself on a regular basis and utilise acronyms as much as feasible.
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What is aluminum nitrate formula?
the chemical formula for aluminium nitrate as a mordant in the dyeing One aluminium ion (Al3+) and three nitrate ions (NO3-) make up the chemical compound known as aluminium nitrate. Al(NO3)3 is the written
version of its chemical formula. With a molecular weight of 212.99 g/mol, aluminium nitrate is a white, crystalline solid that is soluble in water. Aluminum oxide, aluminium hydroxide, and other aluminium salts are frequently made using it. Moreover, it serves as a mordant in textile dyeing, a catalyst in a number of chemical processes, and an ingredient in certain fertilisers.Nitric acid and aluminium metal can be combined to create aluminium nitrate, or aluminium oxide or hydroxide can be dissolved in the acid to create aluminium nitrate. Given that it is an oxidising agent and that reducing agents or flammable materials might
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What are the 4 rules for naming ionic compounds?
The four rules for naming ionic compounds are: 1) write the name of the cation, 2) write the name of the anion, 3) combine the names and 4) use roman numerals to indicate the charge of the cation if it is a transition metal.
The cation (positive ion) is named first, followed by the anion (negative ion).
The name of the cation is the same as the element from which it is derived. If the element can form cations with different charges, the charge is indicated using Roman numerals in parentheses after the element name.
The name of the anion is derived from the name of the element, with the ending changed to "-ide".
If the compound contains a polyatomic ion (a group of atoms with a net charge), the name of the ion is used in the compound name.
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a 50.0 ml sample of an acid, ha, of unknown molarity is titrated, and the ph of the resulting solution is measured with a meter and graphed as a function of the volume of 0.100 m naoh added. question a student carries out the same titration but uses an indicator instead of a ph meter. if the indicator changes color slightly past the equivalence point, what will the student obtain for the calculated concentration of the acid? responses slightly less than 0.0800 m slightly less than 0.0800 m slightly more than 0.0800 m slightly more than 0.0800 m
The student will obtain a calculated concentration of the acid that is slightly more than 0.0800 M.
What is molarity?Molarity is a unit of concentration used in chemistry to measure the amount of a substance dissolved in a solution. It is defined as the number of moles of solute per liter of solution, denoted by the symbol M. In other words, molarity tells us how much solute is present in a given volume of solution. To calculate molarity, you need to know the amount of solute (in moles) and the volume of the solution (in liters). The formula for molarity is: Molarity = moles of solute / liters of solution. Molarity is a measure of the concentration of a solute in a solution, defined as the number of moles of solute per liter of solution. It is typically represented by the symbol M and has units of moles per liter (mol/L).
Here,
When an indicator is used, the end-point of the titration is usually slightly past the equivalence point. This means that the volume of NaOH required to reach the end-point is slightly more than the volume required to reach the equivalence point. As a result, the calculated concentration of the acid will be slightly higher than the true value.
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Explain why most volcanoes occur at plate boundaries and which two types of boundaries are most common.
Please explain why your answer is correct
Most volcanoes occur at plate boundaries because the tectonic plates are moving away from one another and the Earth's crust is pulled apart to create a new pathway for rising hot magma to flow on to the surface while the two types of boundaries which are most common are:
Divergent plate boundaries.Convergent plate boundaries.What is a Volcano?This is referred to as a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
It occurs at the plate boundaries because Earth's crust is pulled apart to create a new pathway for rising hot magma to flow on to the surface and the types which are most common are divergent plate boundaries which includes two tectonic plates that are moving away from each other and convergent plate boundaries which involves two tectonic plates moving toward each other.
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how long does the non-oxidative energy system typically provide energy? group of answer choices 5 to 60 minutes 3 to 5 minutes 10 to 120 seconds up to 3 seconds
Anaerobic or non-oxidative energy system. The non-oxidative power system does not need oxygen to produce ATP, as the name suggests.
What does the word "anaerobic" mean in medicine?
Anaerobic is defined in medicine. When intense activity, anaerobic respiration takes place, pyruvic acid serves as a proton donor, and anaerobic bacteria cause lactic acid to build up in the tissues. 1a: alive, active, or happening in the lack of free oxygen
What advantages do anaerobic exercises have?
All people should engage in aerobic exercise to improve their overall health, strengthen their muscles, and reduce their risk of inflammation. Make sure you get off to a sluggish start. Increase the frequency, and duration gradually to give your body time to adjust to the new pace and avoid becoming hurt.
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Explain the octet rule. Why are hydrogen and helium exceptions to the octet rule?
Discuss electron configurations in your answer.
Hydrogen and helium have only one electron shell. The first shell has only one s orbital and no p orbital.Therefore, it has only two electrons. So, these elements are most stable when they have two electrons.
What do you mean by the term octet rule ?The octet rule states that an atom loses or gains an electron in order to achieve a stable electronic configuration. It defines the tendency of an atom to have eight electrons in the outermost shell.
Both helium and hydrogen are stable with two electrons in the valence shell rather than according to the octet rule. They only require the s2 orbital filled since they lack p-orbitals.
Thus, The electronic configuration of hydrogen is 1S¹ and He is 1s².
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as you go higher in the troposphere the temperature?
Answer:
True...................
when using acids and bases, note that these substances are
When using acids and bases, note that these substances are corrosive. Make every effort to avoid contact with skin. Be sure to wipe up any spills lab surfaces immediately.
What are acids?An acid is described as a molecule or ion capable of either donating a proton, known as a Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis acid.
It is important that while using concentrated acids or acid solutions, an individual should wear chemical splash goggles, chemical-resistant gloves, and a chemical-resistant apron.
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If 28. 25 ml of 0. 07439 m naoh solution was required to reach the endpoint in a khp titration and the sample weight was 1. 1670 g, what is the %khp (wt% in the unknown sample?
If 28. 25 ml of 0.07439 M NaOH solution required to reach the endpoint in a KHP titration and the sample weight was 1. 1670 g, the % KHP is 36.76 %.
The volume of NaOH = 28.25 mL
The molarity of NaOH = 0.07439 M
The moles of NaOH = molarity × volume
= 0.07439 × 0.02825
The moles of NaOH = 0.00210 mol
The molar mass of KHP = 204.22 g/mol
The Mass of KHP = 0.00210 × 204.22
The mass of KHP = 0.429 g
% KHP = (0.429 / 1.1670 ) × 100 %
% KHP = 36.76 %
Thus, the % KHP is 36.76 %.
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A nonsense mutation occurs in the 267th codon of a gene that encodes a 500 amino acid protein. How many amino acids does the mutated polypeptide contain? A. 266 B. 267 C. 268 D. 500
When a nonsense mutation occurs in the 267th codon of a gene that encodes a 500 amino acid protein. The number of amino acids does the mutated polypeptide contain is 266. Hence, the correct choice is A.
Generally mutation is defined as an alteration in the genes or chromosomes of a cell. This genes shift or the mutation in the gametes may impact the development and structure of the progeny. A mutation in biology is defined as a modification of the nucleic acid sequence of a virus, extrachromosomal DNA, or the genome of an organism.
Hence, the correct option is A.
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What is the density of a substance that has a volume of 24 ml and weighs of 216 grams
Explanation:
Formula for density = mass/volume
where mass = 216g
volume = 24ml
density = ?
Density = 216 ÷ 24
= 9g/ml
Examine the elements of noble gas and discuss TWO (2) properties of this type of element.
Any one of the 7 chemical elements that compose Group 18 (VIIIa) of a periodic table is referred to as a noble gas. The noble gases generally inflammable, tasteless, colorless, and odorless.
Explain about the noble gas and its properties?Due to their full valence shells (octets), which render them incredibly nonreactive, the noble gases (Group 18), which are found at the far right of a periodic table, were formerly known as the "inert gases."
Properties of the noble gas:
Noble gases are low chemically reactive, odorless, colourless, nonflammable, and monotonic gases.Noble gases are exceedingly stable and uncommon to form chemical connections since they have minimal inclination to receive or lose electrons, thanks to the complete valence electron shells of such atoms. There are exceptions to the rule that noble gases need not typically combine with other substances to form compounds.Xe can combine with fluoride or oxide to produce compounds.To know more about the noble gas, here
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what is a number placed in front of a chemical symbol or formula in order to balance the equation
A number placed in front of a chemical symbol or formula in a chemical equation is called a coefficient.
Coefficients are used to balance a chemical equation by adjusting the relative numbers of reactant and product molecules to satisfy the law of conservation of mass. For example, the balanced equation for the reaction between hydrogen gas and oxygen gas to form water is:
2H₂(g) + O₂(g) → 2H₂O(l)
In this equation, the coefficients in front of the reactants and products (2 and 1, respectively) indicate that two molecules of hydrogen react with one molecule of oxygen to form two molecules of water. The coefficients must be chosen so that the number of the atoms of each of the element is the same on both sides of the equation.
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minerals are classified by specifying the principal . choose one: a. anion or anion group b. crystal structure c. mineral habit d. cation or cation group
Minerals are classified by specifying the principal, anion or anion group. The correct option is option A among all the given options.
What is mineral?Because the anion and anion group does have the greatest impact on the characteristics of the mineral, minerals are arranged according with anion and anion group that they contain. An example of an anion is SO42-.
Probably the most prevalent group in the mantle and crust are silicates, which have the anion SiO44-. Minerals are classified by specifying the principal, anion or anion group.
Therefore, minerals are classified by specifying the principal, anion or anion group. The correct option is option A.
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what is n3 lewis structure
N₃, or nitrogen trioxide, is a chemical compound that contains one nitrogen atom and three oxygen atoms. The Lewis structure of N₃ shows how the valence electrons of each atom are arranged and shared in the molecule.
To draw the Lewis structure of N₃, we need to follow these steps:
Determine the total number of valence electrons in the molecule.
The total number of valence electrons is the sum of the valence electrons of each atom in the molecule. Nitrogen has five valence electrons, and each oxygen has six valence electrons, so the total number of valence electrons in N₃ is:
5 + (3 x 6) = 23
Determine the central atom.
The central atom is the atom that is bonded to the other atoms in the molecule. In N₃, nitrogen is the central atom, as it is bonded to all three oxygen atoms.
Connect the atoms with single bonds.
In N3, nitrogen is bonded to each oxygen atom with a single bond. This uses up three of the 23 valence electrons.
Arrange the remaining valence electrons to satisfy the octet rule.
After the single bonds are formed, we have 20 valence electrons left. Oxygen has six valence electrons, and nitrogen has five valence electrons. To satisfy the octet rule for each atom, we need to form double bonds between nitrogen and two of the oxygen atoms. This uses up four more valence electrons.
The remaining two valence electrons are placed on the nitrogen atom, which now has an incomplete octet. However, it is acceptable for nitrogen to have an incomplete octet in some cases.
Therefore, the Lewis structure of N3 is:
O
╱ \
O = N = O
╲ /
O
In this structure, each atom has a complete octet, except for nitrogen, which has seven valence electrons. This structure shows that N3 has a linear shape, with the nitrogen atom in the center and the three oxygen atoms bonded to it. The Lewis structure also helps us to understand the chemical behavior and properties of N3.
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A scientist mixes 0.02 g of a strong monoprotic base in 83 ml of water and obtains a pH of 12. He then realizes that he forgot to label the container and forgot what base he added. What is the most likely the identity of this base? a. KOH b. LiGH c. RbOH d. NaOH
LiOH is the most likely identity of this base because it has the highest concentration of hydroxide ions.
What is a base?Chemical compounds with the potential to neutralize acids are known as bases. A pH value higher than 7 indicates the presence of bases, which contain more hydroxide (OH-) ions than hydrogen (H+). Bases, which come in both organic and inorganic forms, are frequently discovered in items used on a daily basis including cleaning supplies, soaps, and shampoos. Ammonia, potassium hydroxide, and sodium hydroxide are a few typical examples of bases (NH3). Bases play a crucial role in a variety of chemical reactions and processes, such as the creation of fertilizers, the synthesis of medications, and the treatment of wastewater. Along with being used in medicine to neutralize stomach acid, they are also employed in laboratories to change the pH of liquids.
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what analyte could potentially be falsely elevated if a purple top tube was drawn before a green top tube?
Answer:
Drawing a purple top tube, which typically contains the anticoagulant EDTA, before a green top tube, which typically contains the anticoagulant heparin, could potentially result in a falsely elevated potassium level. This is because EDTA can cause the release of potassium from red blood cells, leading to a falsely high potassium level in the plasma or serum. Therefore, it is important to follow the proper phlebotomy order of draw when collecting multiple tubes to avoid contamination and errors in laboratory test results.
mass (g) to mass (g)
N2 + 3H2 > 2NH3
How many moles of hydrogen are needed to react with 2 grams of nitrogen?
Answer:
0.214 moles of hydrogen are needed to react with 2 grams of nitrogen.
True or False? colligative properties depend only on solute concentration; the identity of the solute is not important.
Colligative qualities of solutions are traits that are dependent on the quantity of solute ions or molecules that are present, but not on the kind of solute. Vapor pressure reduction is one of its collaborating qualities.
The correct answer is true
Simply put, what do ions mean?A chemical species known as an ion is one that has a significant amount of either positive or negative charge. Atoms or molecules with non-zero net charges are referred to as "ions" in this context.
How do ions form?According to definition, a ion is just an electrostatically particle that is created by either taking electrons from a negative ion to generate a positive ion and adding electrons to the a neutral atom to produce a negative ion. The amount of protons remains constant as an ion forms.
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2 Name too substances that can be used as electrode during the electrolysis of acidified water
Answer:
Platinum (Pt) electrodes are used in the electrolysis of
H2O
because it is an inert metal and do not take part in the reaction. It just acts as a medium of electron flow between the electrolyte and the circuit. Other commonly used inert electrodes include stainless steel, graphite, etc.
What is the formula for copper(II) sulfate?
Cu2S
A: Cu2SO4
B: CuSO4
C: CuS
Choose the correct answer
Answer:
B
Explanation:
When given a written name, there are ways to assess clues on how to determine the formula.
First, charges are assumed for the cation, unless it is explained. The charges for the non-metals and metals are known; however, transition metals change in charge from time to time, so they are noted with a parenthesis, and a number in between.
In this example, we know that Copper (Cu) has a charge of +2.
Next, find the identity of the anion. Sulfate is actually a polyatomic ion; most likely will be a memorization factor in collegiate chemistry classes. Sulfate's notation is [tex]SO_4^{-2}[/tex], which means it has a -2 charge.
Lastly, balance. Remember, the charges have to add up to zero for a normal compound; therefore, since Copper (Cu) has a charge of +2, and [tex]SO_4[/tex] has a charge of -2, no balancing of the cation or anion is needed.
[tex]CuSO_4[/tex] will be your final answer.
