Cl− is a Lewis base because it donates a nonbonding electron pair.
What is a Lewis base?So any species with a filled orbital containing an electron pair that is not involved in bonding but has the potential to establish a dative bond with a Lewis acid to produce a Lewis adduct is considered a Lewis base. Because it can transfer its single pair of electrons, NH3 is a Lewis base. Trimethylborane (Me3B), which may receive a lone pair, is a Lewis acid. A dative bond is created in a Lewis adduct when the Lewis base and acid share an electron pair. A lone pair from NH3 will establish a dative bond with the vacant orbital of Me3B during a specific chemical reaction involving NH3 and Me3B to create the adduct NH3•BMe3.
Cl− is a Lewis base because it donates a nonbonding electron pair.
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For which enzyme are nucleotides the substrate? a)l Protease b) Ligase c) Ribosome d) DNA polymerase
The option (d) is correct DNA polymerase enzyme are nucleotides the substrate.
We refer to a substance as a substrate when another substance is added to it. It is defined differently in several sciences. In the field of material sciences, the term "substrate" is widely used to describe the base material on which various processing operations are carried out with predetermined reaction parameters to produce additional layers and films, such as coatings. As a result, there are numerous definitions available in the literature, depending on the substrate's applications and area of study. A substrate is a molecule that an enzyme interacts with. The enzyme's active site, where potential weak connections between molecules can form, is filled with a substrate. The targeted reaction results in the formation of an enzyme substrate complex as the substrate reacts under the pressure of the enzyme. The conformational shift, or shape change, of the enzyme is caused by the bonds that develop between the substrate and the enzyme.
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both the codons uuu and uuc specify the amino acid phenylalanine. this is possible because the genetic code is __________. a. commaless b. non-overlapping c. degerate d. non-ambigous
Phenylalanine is indicated by the codons uuu & uuc. The degenerated genetic code makes this feasible.
What exactly does it mean to be a degenerate?adjective. If you label someone as degenerate, you are disapproving of them because you believe they have poor morals or standards of behavior. A bunch of vile computer hackers, to be exact. Synonyms include vile, base, corrupt, and fallen. Additional Degenerate Synonyms
How do you recognize degeneracy in something?If an energy level in quantum mechanics corresponds in two or more distinct observable states of the a quantum system, it is said to be degenerate. A quantum mechanical system is considered to be degenerate if two or more of its states have the same energy value when measured.
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Part 1
Define matter, and an atom
Define Protons, Neutrons, and Electrons
Identify the location of protons, neutrons, and electrons within an atom
What is the mass and charge of a proton, neutron, and electron?
Define a cation and anion.
Draw the stable, Cation, and Anion versions of lithium and boron
How do you determine the mass and charge of an entire atom?
How do we use the periodic table? Identify periods and groups in a periodic table
What is the chemical symbol of an element? Atomic mass?
Why is the atomic number of an element important? What information does the atomic number
provide us with?
Part 2
Define elements, compounds, and mixtures
What is a pure substance?
Compare and contrast elements and compounds
Compare and contrast ionic compounds vs. covalent compounds
Discuss the difference between heterogeneous and homogeneous mixtures
Provide examples of chemical changes and physical changes
Part 3
Define the following reactions
● Synthesis reactions
● Decomposition
● Single and Double
● Combustions
Identify the chemical reaction taking place in each chemical equation
1. NaOH + KNO --> NaNO + KOH
2. CH2 + O2 --> CO2 + H2O
3. Fe + NaBr --> FeBr + Na
4. CaSO4 + Mg(OH)2 --> Ca(OH)2 + MgSO4
5. NaO2 --> NaO + O
6. Pb + O2 --> PbO2
A combustion reaction always follows a specific formula. How can you identify a combustion
reaction given that information?
What is the law of conservation of mass? How does this relate to balancing equations?
hope this helps
Part 1
Define matter, and an atom
Ans: An atom is the smallest unit of matter that retains all of the chemical properties of an element. matter is any substance that has mass and takes up space by having volume. Atoms are combine to form matter.
Define Protons, Neutrons, and Electrons
Ans: . Electrons are a type of subatomic particle with a negative charge. Protons are a type of subatomic particle with a positive charge. Protons are bound together in an atom's nucleus as a result of the strong nuclear force. Neutrons are a type of subatomic particle with no charge (they are neutral)
Identify the location of protons, neutrons, and electrons within an atom
Ans:Atoms are made of extremely tiny particles called protons, neutrons, and electrons. Protons and neutrons are in the center of the atom, making up the nucleus. Electrons surround the nucleus.
What is the mass and charge of a proton, neutron, and electron?
Ans: Protons, neutrons, and electrons: The nucleus contains protons and neutrons, each of which has a mass of one amu. Protons, on the otheAnsr hand, have a charge of +1, whereas neutrons are uncharged. Electrons have a charge of -1 and have a mass of around 0 amu. They orbit the nucleus and have a mass of approximately 0 amu
Define a cation and anion.
Ans:Cations are ions that are positively charged. Anions are ions that are negatively charged
Ans:Cations are ions that are positively charged. Anions are ions that are negatively chargedDraw the stable, Cation, and Anion versions of lithium and boron
How do you determine the mass and charge of an entire atom?
Ans: The mass of an atom is a weighted average that is largely determined by the number of its protons and neutrons, whereas the number of protons and electrons determines its charge. Each atom of an element contains the same number of protons, known as the atomic number (Z).
How do we use the periodic table? Identify periods and groups in a periodic table
Ans:The periodic table is arranged in order of atomic number. A period is a horizontal row of the periodic table. A group is a vertical row of the periodic table
What is the chemical symbol of an element? Atomic mass?
Ans: The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D).
Why is the atomic number of an element important? What information does the atomic number
provide us with?
Ans: The atomic number (Z) of an element is the number of protons in the nucleus of each atom of that element. This means that the number of protons is the characteristic which makes each element unique compared to all other elements.
sorry can't fit part 2
I should get 100 points for this
QUESTION 39 CH3CO2H is called acetic acid. The name implies that a. It does not react with either acids or bases. O b. It can donate an H+ ion to a base, and forms CH3CO2- c. It can react with acids, but does not react with bases. d. It can accept an H+ ion from a base, and forms CH3CO2H2+ Oe. It can donate an electron to a base, and forms CH3CO2H+
CH3CO2H is called acetic acid. The name implies that, the correct option is (b) i.e. It can donate an H+ ion to a base, and forms CH3CO2-.
By changing the autoionization equilibrium in water, base produce solutions with lower hydrogen ion activity than pure water, meaning the water has a pH value greater than 7.0 under normal circumstances. If a soluble base includes and releases OH ions in a quantitative manner, it is referred to as an alkali. Basic substances include metal oxides, hydroxides, and notably alkoxides, as well as conjugate bases of weak acids. Acids have the effect of increasing the hydronium (H3O+) concentration in water, whereas bases have the reverse effect. This is why bases and acids are viewed as chemical opposites. Since OH does react with H+ to generate water, this does contain aqueous hydroxides, making Arrhenius bases a subset of Brnsted bases. Aqueous solutions of ammonia (NH3) or its chemical compounds are examples of other Brnsted bases that receive protons (amines). Despite the fact that these bases lack a hydroxide ion, when they interact with water, the hydroxide ion concentration rises. Additionally, Brnsted bases are present in several non-aqueous solvents, which interact with solvated protons.
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compare the conjugate bases of these three acids. acid 1: sulfurous acid , h2so3 acid 2: phosphoric acid , h3po4 acid 3: hydrogen sulfide , hs- what is the formula for the strongest conjugate base ?
The formula for the strongest conjugate base is HCO₃⁻ (hydrogen carbonate).
The chemical formula for the most efficient conjugate base is HCO₃⁻, which refers to the compound hydrogen carbonate. When we analyze the relative acidic strength of Hf, H₂CO₃, and hydrogen sulfide (H₂S), we find that F⁻ has the lowest relative acidic strength. Since we already know that strong acids have the weakest conjugate bases, this leads us to the conclusion that F⁻ is the weakest conjugation base.
As a result, HCO₃⁻ possesses an effective conjugate base. Hydrogen carbonate is an intermediate form that results from the deprotonation of H₂CO₃. It is also known as bicarbonate, and it is amphoteric in its natural state. Bicarbonate plays an essential metabolic role in the system that maintains the physiological pH buffering balance.
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How many moles in 3.612 x 10^23 atoms of Fe?
The moles in 3.612 x 10^23 atoms of Fe is 0.6 moles
How many moles are there in 3.612 x 1023 Fe atoms?given dataFe contains 3.6121023 atoms.
moles per person =?
The Avogadro number will be used to solve the stated issue.It is the quantity of atoms, ions, and molecules contained in one gram of an element's atoms, compound molecules, and ions, respectively.The Avogadro number is the number 6.022 1023.For example,
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
From atoms to mole:
3.612×10²³ atoms of Fe × 1 mole / 6.022 × 10²³ atoms
0.6 moles of Fe
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What is the value for the reaction quotient, Q, for the cell? Express your answer numerically. What is the value for the temperature, T, in kelvins? Express your answer to three significant figures and include the appropriate units. What is the value for n? Express your answer as an integer and include the appropriate units (i.e. enter mol for moles). Calculate the standard cell potential for Mg(s) + Fe^2+(aq) rightarrow Mg^2+ (aq) + Fe(s) Express your answer to three significant figures and include the appropriate units.
The reaction quotient of the reaction of the is obtained as 7.2 * 10^-2 while the cell potential is the cell is 1.93 V.
What is the reaction quotient?We know that the reaction quotient has to do with the constant that shows the extent to which the reactants are converted into products under non equilibrium conditions. This implies under the conditions that are not covered by the equilibrium constant of the reaction.
Then we know that in the case of the reaction that we have;
Q = [tex][Mg^{2+} ][/tex]/[tex][Fe^{2+}][/tex]
Given that;
Iron II = 2.90 M
Magnesium ion = 0.210 M
Then;
Q = 0.210 M/2.90 M
Q = 7.2 * 10^-2
Now we obtain the Ecell from;
Ecathode - Eanode
We then have;
-0.44 V - (-2.37 V)
= 1.93V
The calculations show that the cell reaction quotient for the ions can be given as 7.2 * 10^-2 and the cell potential is 1.93 V.
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Which of the following substances is NOT a solution? A) humid air B) beer C) oxygen D) steel E) All of the above are solutions_
Substances which is not a solution is : E) All of the above are solutions
A solution is a homogenous mixture of two or more substances. Humid air is a mixture of water vapor and air, but it is not homogenous, so it is not a solution. Beer is a mixture of water, hops, barley, and yeast, but it is not homogenous, so it is not a solution. Oxygen is an element, not a mixture of substances, so it is not a solution. Steel is an alloy, which is a mixture of two or more metals, but it is not homogenous, so it is not a solution.
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will hcl (g) or nacl (s) be more soluble in the solvent ch3och3? why? multiple select question. nacl (s) will be more soluble in ch3och3. ion-dipole forces in a nacl solution are more likely to overcome solute-solute interactions than dipole-dipole forces in a hcl solution. the dipole-dipole forces in an hcl solution are similar in strength to the dipole-dipole forces between ch3och3 molecules. hcl (g) will be more soluble in ch3och3. hcl is capable of hydrogen bonding to ch3och3, whereas nacl is not.
Similar to the dipole-dipole interactions between CH3OCH3 molecules, the dipole-dipole forces in an HCl solution are quite strong. - In CH3OCH3, HCl (g) will be more soluble.
In carbon tetrachloride, which of the following chemicals is most likely to dissolve?This means that whereas non-polar solutes are more soluble in non-polar solvents, polar solutes are more soluble in polar solvents. The non-polar material will therefore be most soluble in CCl4, considering your choice of compounds.
The multiple choice question about the fundamentals of solubility asks, "How does the saying like dissolves like apply?"For a solute to be soluble, it needs to share the same polarity as the solvent. The main message is that a polar solute will dissolve in a polar solvent.
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draw the major organic product of the following reaction
You must remember that there will be a rearrangement. So, you should get is 1-chloro-2-methylcyclopentane.
What is organic product?
With very few exceptions, a chemical is regarded as organic if it contains at least one carbon atom, regardless of its source. Organic chemistry is sometimes referred to as "the chemistry of carbon" due to the fact that the carbon atom is normally bonded to at least one hydrogen atom.
What is reaction?
In a chemical reaction, one or more substances—also known as reactants—become one or more new substances, also known as products. Both chemical components and elements are substances.
Therefore, You must remember that there will be a rearrangement. So, you should get is 1-chloro-2-methylcyclopentane.
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what is the REDUCED mass of H2 and N2 using Ma*Mb/Ma+Mb
The reduced mass of H2 and N2 is 1.86g.
What is reduced mass?In Newtonian mechanics' two-body problem, the reduced mass is the "effective" inertial mass. It is a quantity that makes it possible to solve the two-body problem as if it were a one-body problem. However, the mass that determines gravitational pull is not lowered. It is denoted by μ.
It is given by equation:
1 / μ = 1 / m1 + 1 / m2
μ = [tex]\frac{m1 * m2}{m1 + m2}[/tex]
According to the question,
Molar mass of H2 = 2
Molar mass of N2 = 28
Substituting the values in equation:
μ = [tex]\frac{2 * 28}{2 + 28}[/tex]
μ = [tex]1.86 g[/tex]
The reduced mass of H2 and N2 is 1.86g.
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calculate the concentration of an h3po4 solution if 25.00 ml is converted to na2hpo4 by 39.13 ml of 2.000 m naoh solution.
The concentration of an H₃PO₄ solution if 25.00 ml is converted to Na₂HPO₄ by 39.13 ml of 2.000 m NaOH solution is 3.12 M.
given that :
Concentration M1 = 2.00 M
volume V1 = 39.13 mL
Volume V2 = 25 mL
Concentration M2 = ?
concentration = moles / volume in L
moles = concentration × volume in L
moles = 2 × 0.03913
moles = 0.0782 mol
Concentration of H₃PO₄ = moles / volume in L
Concentration of H₃PO = 0.0782 / 0.025
Concentration of H₃PO₄ = 3.12 M
Thus, the concentration of an H₃PO₄ solution is 3.12 M
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In the following pair, which species would you expect to be the stronger Lewis acid?
Cu+
Cu^2+
In the mentioned pair, the species
[tex] {Cu}^{2+} [/tex] is stronger Lewis acid.
To determine the strength of Lewis acid, firstly we need to understand the definition of Lewis acid. Based on definition, Lewis acid is an electron pair acceptor.
Now, interpreting the information of given species of Copper. The one positive sign indicates deficiency of one electron and two positive signs indicates deficiency of two electrons. Based on this, the [tex] {Cu}^{2+} [/tex] will require two electrons and hence will be stronger Lewis acid.
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how many σ and π bonds are present in a molecule of cumulene? (figure 1)
Three double bonds and four single bonds, or 3(+)+4=7+3, are present in cumulene.
Sigma bond between the hydrogen and carbon on the end-side of the cumulene is visible. Carbon and hydrogen are linked by a total of four sigma bonds. Carbon is joined to carbon in the center by 3 sigma bonds and 3 pi bonds. Cumulene now has a total of 7 sigma bonds and 3 pi bonds. A cumulene is a molecule in organic chemistry that has three or more cumulative (consecutive) double bonds. sp2 hybrid orbital of C overlapping with 2p orbital of O and one bond make up the bond.
In the case of compounds with two bonds, one bond is a sigma bond and the other is a pi bond. A triple bond indicates that the chemicals.
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8. Show that [BrF4] - is a non-polar molecule.
[BrF4] - is a non-polar molecule.
What is polarity of a molecule?A molecule's polarity reveals whether the electron cloud is evenly distributed among its atoms or whether an electronegative atom is having an impact on the electron density. The behavior and reactivity of the molecule will be influenced by the electron distribution. For instance, if you know a chemical's polarity, you may anticipate which solvents would work best with it.
Despite the fact that they are both homogeneous solutions on their own, water and oil do not mix well. A more thorough examination of the polar forces influencing the two solutions will shed light on this phenomenon.
it is called Tetrafluoroborate ion
Bond order = 0.5
[BrF4] - is a non-polar molecule.
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What mass of calcium hydroxide is formed when 10. 0 g of calcium oxide reacts with 10. 0 g of water?.
The mass of calcium hydroxide is formed when 10.0g of calcium oxide reacts with 10.0 g of water is 13.024g.
The equation can be written as, CaO + H2O → Ca(OH)2
We have to find the moles of each reactant. We can calculate this by the expression using molar mass and mass of the reactant. the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance which is the number of moles in that sample. Moles can be expressed as,
moles = mass / molar mass
moles of CaO= 10 g/56 g/mole
= 0.179 moles
moles of H2O = 10 g/18 g/mole
= 0.556 moles
when 10.0g of calcium oxide reacts with 10.0g of water we have to calculate mass of calcium hydroxide. we can calculate this by using the expression for molar mass M is the mass of a chemical compound divided by its amount of substance measured in moles. it is expressed as,
mass= moles x molar mass
= 0.176 moles x 74 g/mole
= 13.024 grams
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g which of the following alcohols would be most soluble in water? a) ethanol b) butanol c) hexanol d) octanol e) decanol
The following alcohols would be most soluble in water Ethanol would be the most soluble in water.
Ethanol is a renewable fuel made from corn and different plant materials. Ethanol use is sizable, and more than ninety eight% of gas in the U.S. consists of a few ethanol. The maximum not unusual mixture of ethanol is E10 (10% ethanol, 90% fuel).
Ethanol (or ethyl alcohol) is the sort of alcohol that over billion humans drink each day. This sort of alcohol is produced with the aid of the fermentation of yeast, sugars, and starches.
Ethanol intoxication is commonplace in older teenagers thru adulthood. The poisonous dose for an grownup is 5 mg/dL, while the poisonous dose in a toddler is 3 mg/dL. Youngsters are at better dangers of developing hypoglycemia following a single ingestion than are adults.
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if the total pressure in the astronaut's suit drops to 0.5 atm, and it contains 78% nitrogen and 21% oxygen, then what is the partial pressure of nitrogen and oxygen in the suit?
The atmosphere of Mars contains 95.32% of Carbon dioxide, 2.6% molecular Nitrogen, and 1.9% Argon, and the rest is water vapor, Carbon monoxide oxygen, and other noble gases.
Its atmospheric pressure is less than 1% that of Earth.
Atmospheric pressure on Mars is 610 Pascale which is equal to 0.00602023 atm
In mmHg, this pressure is equal to 4.57538 mm of Hg.
Dry air is composed of approximately 21% oxygen, 78% nitrogen, and 1% other gases. According to Dalton's Law, at any depth, the partial pressure of oxygen is 21% of the total pressure exerted by air, and the partial pressure of nitrogen is 78% of the total pressure.
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very small changes in the solute concentrations in the various fluid compartments cause water to move from one compartment to another, which alters blood composition and blood pressure. how do the following physiological changes affect blood pressure?
Blood pressure elevation Vasoconstriction, a rise in salt consumption, and an increase in peripheral resistance increasing blood volume, increasing water absorption, and reducing peripheral resistance
What occurs during vasoconstriction?Vasoconstriction is the process by which tiny muscles in the blood vessel walls narrow (constrain) the blood vessel. Blood flow is hindered or slowed down when blood arteries constrict. There can be mild or severe vasoconstriction. It could be brought on by a medical condition, medication, or psychological issues.
Why does the body constrict its blood vessels?Vasoconstriction is necessary to assist maintain a healthy blood flow also prevent your body from becoming overly cold. Additionally, when necessary, it can elevate blood pressure. In order to promote vasoconstriction, several drugs imitate your body's natural signals.
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Draw the condensed structure for each of the following: a. (Z)-1,3,5-tribromo-2-pentene, b. (Z)-3-methyl-2-heptene, c. (E)-1,2-dibromo-3-isopropyl-2-hexene, d. vinyl bromide, e. 1,2-dimethylcyclopentene, f. diallylamine
The condensed structure formula are where it shows all atom but will omits the vertical bonds and all the horizontal single bond.
The condensed structure formula is given as follows :
a) 1,3,5-tribromo-2-pentene = BrH₂CCH₂ - C = CH - CH₂Br
|
Br
b) 3-methyl-2-heptene = CH₃CH₂CH₂CH₂ - C = CH - CH₂
|
CH₃
c) 1,2-dibromo-3-isopropyl-2-hexene = CH₃CH₂CH₂ - C = C - CH₂Br
| |
CH₃CH₂ Br
|
CH₃
c) vinyl bromide = CH₂ = CHBr
e) diallylamine = CH₂ = CHCH₂ - NH - CH₂CH = CH₂
Thus, the condensed structure for the given compounds are given above.
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What reaction does a vitamin KH2-dependent enzyme catalyze? View Available Hint(s) O It decarboxylates the y-carbon of a glutamate side chain. O It carboxylates the y-carbon of an aspartate side chain. O It carboxylates the ycarbon of a glutamate side chain. O It carboxylates the ycarbon of a glutamine side chain. O It carboxylates the P-carbon of a glutamate side chain. Submit PartQ CoASH is used to activate carboxylic acids. What type of compound is formed between CoASH and a carboxylic acid? View Available Hint(s) O anhydride O thioether O amide O thioester O mixed anhydride with phosphate Submit ▼ Part H What role does ATP play in biotin-dependent enzymes? O It puts a good leaving group on bicarbonate. O It provides a strong base. O It provides a strong nucleophile. It delocalizes electrons It reduces bicarbonate. Submit Request Answer Part F TPP is the coenzyme required by pyruvate decarboxylase. What product is formed in that reaction? View Avallable Hint(s) O acetaldehyde O butanal O formaldehyde O acetone O propanal Submit
Part Q: The compound formed when CoASH is used to activate a carboxylic acid is a thioester.
Thioesters are formed when the carboxyl group of the carboxylic acid reacts with the sulfhydryl group of CoASH. The reaction results in the formation of a thioester, a compound containing a carbon-sulfur bond.
Part H: ATP plays an important role in biotin-dependent enzymes. It provides the energy necessary to drive the reaction of biotin-dependent enzymes by donating a high-energy phosphate group to the substrate. This energy transfer results in the formation of a new product, as well as the release of the phosphate group, which serves as a good leaving group.
Part F: The product formed when pyruvate decarboxylase is activated by TPP is acetaldehyde. Pyruvate decarboxylase catalyzes the decarboxylation of pyruvate to form acetaldehyde. TPP serves as a coenzyme, allowing the reaction to occur by providing a strong nucleophile. This nucleophile is then able to attack the pyruvate molecule and facilitate its decarboxylation to form acetaldehyde.
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directions: each set of lettered choices below refers to the numbered statements immediately following it. select the one lettered choice that best fits each statement. a choice may be used once, more than once, or not at all in each set. (a) cs (b) ag (c) pb (d) br (e) se question has the lowest first-ionization energy
Cs has the lowest first-ionization energy.
What is first-ionization energy?
In order to create one mole of gaseous ions with a charge of 1+ from one mole of neutral gaseous atoms, the first ionization energy must be used to remove the most loosely held electron. In terms of symbols, this is simpler to understand. It is the amount of energy required to make this transformation for each mole of X.
What is Ionization energy?
The ionization energy assesses an element's capacity to engage in chemical reactions that require the donation of electrons or the production of ions. It frequently has to do with the kind of chemical bonds that are formed between the constituents of the compounds that they produce. See also electron affinity and binding energy.
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The solar nebula was (a) rock and metal. (b) hydrogen compounds. (c) hydrogen and helium.
The solar nebula was (a) rock and metal.
The solar system has evolved significantly since its birth. Many moons formed from disks of gas and dust orbiting their parent planets, while others are thought to have formed independently and later been captured by their planets. Moreover, like Earth's Moon, it could also be the result of a giant impact. Collisions between celestial bodies continue to occur to this day and are central to the evolution of the solar system. Due to gravitational interactions, the planets may be misaligned [2]. It is now believed that this planetary migration was responsible for much of the early development of the solar system. Known as the
Nebula Hypothesis, this model was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Subsequent developments have interwoven various scientific disciplines, including astronomy, chemistry, geology, physics and planetary science. Since the dawn of the space age in the 1950s and the discovery of exoplanets in the 1990s, models have been challenged and refined to explain new observations.
The solar nebula was a disk-shaped cloud of gas and dust composed of rock and metal particles, hydrogen compounds (such as water, methane, and ammonia), and a mixture of hydrogen and helium. This mixture of materials is what eventually coalesced to form the sun, planets, and other objects in the solar system.
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Which statement is correct?
Baking is a chemical change.
Burning is a physical change.
Rusting is a physical change.
Melting is a chemical change.
Baking is a chemical change when you bake a cake the ingredients go through a chemical change. .
What is chemical change?Chemical Change is defined as the process in which the atoms of one or more substances are rearranged or combined to form a new substance. When a substance undergoes chemical change the chemical properties of the substance changes and it is transformed into a different substance with different chemical composition. Examples are burning of any substance, rusting of iron.
Therefore a chemical change occurs when the molecules that compose two or more substances are rearranged to form a new substance.
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1. Metal sulfates are hygroscopic and will absorb water from the atmosphere. As a result, they must be kept in desiccators to keep them dry. Suppose, hypothetically, that the unknown metal sulfate was not desiccated. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 2. In this experiment, an excess of the BaCl2 solution was added to the metal sulfate solution. Suppose, hypothetically, that an excess of the BaCl2 solution was not used. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 3. The last step of the procedure involved vigorously heating the BaSO4 precipitate and filter paper in the crucible. Suppose, hypothetically, that tiny pieces of the filter paper still remained mixed in with the BaSO4 after heating. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 4.An unknown metal sulfate is analyzed and determined to be 72.07% sulfate by mass. Assuming that the charge on the metal cation is +3, determine the identity of this metal cation.
Actual amount of sulfates show lower mass percentage of sulfate and less amount of BaSO4 will be formed and if tiny pieces of filter paper remains in the BaSO4 leading to less mass % of sulfates.
When metal sulfates are hygroscopic and will absorb water from the atmosphere as a result they must be kept in desiccators to keep them dry. the unknown metal sulfate was not desiccated. If the sulfate not desiccated the total weight will be higher for a sulfate . So actual amount sulfate will show lower mass % of sulfate. if excess of BaCl2 is not used, it would lead to lower mass % of sulfate as BaCl2 will be the limiting reagent so less amount of BaSO4 will be formed. if tiny pieces of filter paper remains in the BaSO4 residue it will so higher mass altogether leading to less mass % of sulfates.
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A chem i meer is sluuyy e TonOWIng Teaccion. CH_(9)+2H S(g) → CS2(9)+4H (9) At the temperature the engineer picks, the equilibrium constant K, for this reaction is 1.8 x 10". The engineer charges ("fills") four reaction vessels with methane and hydrogen sulfide, and lets the reaction begin. She then measures the composition of the mixture inside each vessel from time to time. Her first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time she measures the compositions. reaction vessel compound pressure expected change in pressure CH 6.58 atm of increase o decrease O(no change) 1.39 atm of increase o decrease (no change) 6.61 atm of increase o decrease O(no change) 10.10 atm of increase o decrease O(no change) CHA 6.44 atm of increase o decrease no change) H,S 1.12 atm of increase o decrease (no change) CS2 6.75 atm of increase o decrease O(no change) 10.63 atm of increase o 1 decrease O(no change) CH, 7.96 atm of increase o decrease (no change) 2.21 atm of increase o decrease O(no change) 6.97 atm o 1 decrease O(no change) of increase of increase 9.95 atm o decrease (no change)
A)CH4: Increase, H2S: Increase, CS2: decrease, H2: decrease, B )CH4: Increase, H2S: Increase, CS2: decrease, H2: decrease, c) CH4: no change , H2S: no change , CS2: no change , H2: no change At the temperature the engineer picks, the equilibrium constant K, for this reaction is 1.8 x 10". The engineer charges ("fills") four reaction vessels with methane and hydrogen sulfide, and lets the reaction begin.
A)
Equilibrium Quotient expression is
Qp = p(CS2)*p(H2)^4/p(CH4)*p(H2S)^2
= (6.61^1)*(10.1^4)/(6.58^1)*(1.39^2)
=5.4*10^3
comparing Q and k, since Q is greater than K
reaction will move in backward direction
Answer:CH4: Increase, H2S: Increase, CS2: decrease, H2: decrease
B)
Equilibrium Quotient expression is
Qp = p(CS2)*p(H2)^4/p(CH4)*p(H2S)^2
= (6.75^1)*(10.63^4)/(6.44^1)*(1.12^2)
=1.1*10^4
comparing Q and k, since Q is greater than K
reaction will move in backward direction
Answer:CH4: Increase, hydrogen sulfide: Increase, CS2: decrease,H2: decrease
C)
Equilibrium Quotient expression is
Qp = p(CS2)*p(H2)^4/p(CH4)*p(H2S)^2
= (6.97^1)*(9.95^4)/(7.96^1)*(2.21^2)
=1.8*10^3
comparing Q and k, since Q is equal to K
Answer: methane : no change , H2S: no change , CS2: no change , H2: no change
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9 The correct name for the compound Pb3(PO4)4 is (abzi 2) Lead (IV) phosphide Lead phosphide lead monophosphours lead (IV) phosphate
The correct name for the compound Pb3(PO4)4 is lead (IV) phosphate. Chemical substances known as compounds are made up of two or more elements that are chemically bonded together in a certain proportion.
A compound is created when two or more components join chemically in a predetermined mass ratio. A compound is a substance made up of two or more different types of elements together in a specific proportion of their atoms. Some of the particular qualities of the constituent parts are lost during fusion, while the newly created molecule acquires new characteristics. Chemical Formula: The chemical formula identifies a compound. The ratios of atoms that make up a certain chemical molecule are symbolically represented in a chemical formula. Water's chemical formula, H2O, indicates that one molecule of water is made up of two hydrogen atoms and one oxygen atom. One sodium atom and one chlorine atom unite to make a single molecule of common salt, as shown by its chemical formula, NaCl. Salts and molecular compounds are the two categories into which compounds can be divided. Covalent bonds hold the atoms together in molecular molecules. Ionic bonds hold it together in salts.
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Please label she components of a common filter setup and answer the folowing question. All items will be used. Büchner funnel correct. rubber adaptor is item allows twovacuum connection eces of glass to fit gether to form a seal. Büchner f filter flask vacuum connection rubber adaptor unne filter flask What are two uses of a vacuum filtration setup? Select all that apply. crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid storage of a solutionPlease label she components of a common filter setup and answer the folowing question. All items will be used. Büchner funnel correct. rubber adaptor is item allows twovacuum connection eces of glass to fit gether to form a seal. Büchner f filter flask vacuum connection rubber adaptor unne filter flask What are two uses of a vacuum filtration setup? Select all that apply. crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid storage of a solution
The items that are applied to her observations are crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid.
Buchner funnels are used withinside the laboratory for vacuum-assisted liquid filtering. In natural chemistry, those funnels are used to acquire recrystallized compounds due to the fact they assist dispose of moisture from the very last product. A clear out out funnel is a laboratory funnel used for keeping apart solids from beverages thru the laboratory procedure of filtering. In order to obtain this, a cone-like formed piece of clear out out paper is normally folded right into a cone and positioned in the funnel. The suspension of strong and liquid is then poured via the funnel.
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Complete question:
Please label she components of a common filter setup and answer the following question. All items will be used. Büchner funnel correct. rubber adaptor is item allows two vacuum connection aces of glass to fit together to form a seal. Büchner f filter flask vacuum connection rubber adaptor u filter flask What are two uses of a vacuum filtration setup? Select all that apply. crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid storage of a solution.
Name the bond that most likely forms compounds with the following conductivity:
4.6 x 10^4 μS=
1.3 x 10^-2 µS=
The bond that most likely forms compounds with the conductivity of 4.6 x 10^4 μS is an ionic bond. The bond that most likely forms compounds with the conductivity of 1.3 x 10^-2 µS is a covalent bond.
explain the chemistry underlying the disinfection of water by chlorination. what is the active agent in the destruction of the pathogens? what are the practical sources of the active ingredient?
The chemistry underlying the disinfection of water by chlorination involves the use of chlorine to oxidize and kill pathogens in the water.
Chlorine is the active agent in the destruction of the pathogens, and it works by breaking up the cell walls of the bacteria and other microorganisms.
The practical sources of the active ingredient include chlorine gas, hypochlorite, and chlorine dioxide.
Chlorine gas is usually produced in a laboratory and is then added to the water. Hypochlorite is a salt that can be added to the water, while chlorine dioxide is a gas that is typically applied in the form of tablets or powder.
Chlorination is a process used to disinfect water by adding chlorine or a chlorine-containing compound, such as sodium hypochlorite or calcium hypochlorite. Chlorine is a powerful oxidant, which reacts with the organic materials in the water, such as proteins, carbohydrates, and fats, to form compounds that are toxic to many bacteria and viruses. The active agent in the destruction of the pathogens is the chlorine.
The practical sources of the active ingredient are chlorine gas, sodium and calcium hypochlorite. Chlorine gas is the most common form used for disinfecting water and is typically used in larger municipal water systems. It is released into the water as a gas and quickly breaks down into free chlorine, which is the active disinfectant. Sodium and calcium hypochlorite are chlorine compounds that are in a liquid or solid form. They are used in smaller water systems and require the addition of other chemicals to make them effective disinfectants.
When chlorine is added to water, it reacts with the water molecules to form hypochlorous acid (HOCl) and hypochlorite ion (ClO-). The hypochlorous acid is the active disinfectant that kills or inactivates the microorganisms in the water.
It is a strong oxidizing agent and reacts with the proteins and cell walls of the microorganisms, destroying them. The hypochlorite ion is a weaker oxidizing agent and is responsible for the long-term disinfection of the water. It reacts with the organic material in the water to form compounds that are toxic to microorganisms.
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