There is a Carbon atom (C) at the core of the COBr2 Lewis structure, which is surrounded by two Bromine atoms (Br) and one Oxygen atom (O). Between the carbon (C) and oxygen (O) atoms, there is a double bond, while between the carbon (C) and bromine (Br), there is a single bond.
How can you determine a Lewis structure's steric number?The following formula is used to determine the steric number: Number of lone electron pairs on the core atom times the Steric Number plus (number of atoms bonded to the central atom)
How are steric number and hybridization determined?The idea of steric number is particularly helpful because it informs us of the quantity of hybridized orbitals that exist. Thus, you sum up to determine the steric number.
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another sample of eggshell reacts completely with 4.0 ml of unknown concentration if the reaction produced 0.095 atm of gas. the concentration of hcl solution was at least
The concentration of HCl = 1 M
What is the concentration of solution?A solution's concentration is an indicator of how much solute has dissolved in a certain volume of solvent or solution. A concentrated solution has a high concentration of dissolved solute. When a dissolved solute is present in a solution, it is said to be diluted.
Given that,
unknown solution concentration = 4.0 ml
pressure of gas = 0.095 atm
It corresponds to 0.020 gm of CaCO₃.
Thus, moles of CaCO₃ = 0.20 gm /(100 g/mol)
= 0.002 moles
moles of HCl = (moles of CaCO₃ × 2)
= ( 0.002 moles × 2)
= 0.004 moles
So, molarity of HCl = moles / volume in L
= (0.004 moles × 1000)/4
= 1 M
Thus, concentration of HCl = 1 M
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Draw the additional resonance structure(s) of the structure below? 3= 6 Include all valence lone pairs in your answer: Draw one structure per sketcher: Add additional sketchers using the drop-down menu in the bottom right corner: Separate resonance structures using the symbol from the drop-down menu: ost0 CH4
The resonating structures for the given compound is represented in the image attached below.
When a molecule is represented via way of means of or extra hybrid structures and that shape are specific withinside the function of electrons now no longer in function of atoms, then the shape is referred to as as resonating shape and this phenomenon is referred to as as resonance. Resonance systems are a hard and fast of or extra Lewis Structures that together describe the digital bonding of a unmarried polyatomic species inclusive of fractional bonds and fractional charges.
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how high must a column of water be to exert a pressure equal to that of a 760.0 mm column of mercury? (the density of water is 1.00 g/ml, whereas that of mercury is 13.6 g/ml). group of answer choices 29.92 inches 10.3 meters 760 mm 1.00 atm
To impose pressure equivalent to that of a 760.0 mm column of mercury, a column of water must be 10336mm tall, or 10.3m. Per unit area, pressure is the force exerted perpendicularly to an object's surface.
That force is dispersed across. The gauge pressure, also known as gauge pressure, is the pressure in relation to the surrounding air pressure. To express pressure, a variety of units are employed. Mercury is the smallest and sun-closest planet in the solar system. The quickest of all the planets that orbit the Sun, its orbit lasts 87.97 Earth days.
76*13.6*g = h*1*g
h = 76*13.6 = 10.3m
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a 1.00 l flask is filled with 1.25 g of argon at 25 ∘c. a sample of ethane vapor is added to the same flask at constant volume and temperature until the total pressure is 1.000 atm .
a) Partial pressure of argon is calculated as 0.763 atm ; b) Partial pressure of ethane is calculated as 0.237 atm.
What is an ideal gas law?Gases obey an equation of state known as the ideal gas law that is PV = n RT, where n is number of moles of gas and R is the gas constant, 8.314 joules per kelvin per mole.
The ideal gas equation is ,
PV = n RT
P is Pressure of the argon gas
Given, V= Volume of the gas is 1.00 L, mass = 1.25gm
Given, T= Temperature of the gas is 25°C = 298 K (0°C = 273 K)
We know that, R= Gas constant = 0.0821 atm L/K mol
n= moles of gas = given mass/molar mass
= 1.25g / 40g/mol
= 0.0312 moles
P= n RT/V
= (0.0312 * 0.0821 * 298)/1
= 0.763 atm
Partial pressure of argon is 0.763 atm.
In Dalton's law, total pressure is the sum of individual pressures.
P total = P1 +P2
P total = P Ar + P ethane
P ethane = 1 - 0.763
= 0.237 atm
Partial pressure of ethane is 0.237 atm.
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What is the formula for cobalt(III) sulfate (containing the Co3+ ion and SO42â ion)?
Co2(SO4)3 is the chemical formula for cobalt(III) sulfate. The Co symbol stands for cobalt, the S for sulfur, and the O for oxygen. Sulfate is made up of one sulphur atom and four oxygen atoms.
At normal temperature, Co2(SO4)3 is a blueish green crystal. It melts at a temperature of 35 °C (95 °F). It breaks down at its melting point and will also break down in water. Co2(SO4)3 is an effective oxidizer. The Co symbol stands for cobalt, the S for sulfur, and the O for oxygen. Sulfate is made up of one sulphur atom and four oxygen atoms. In addition to being utilised in storage batteries and the electrochemical industries, cobalt 3 sulphate is also employed as a vitamin B12 supplement and as a drier in paints and inks. Cobalt 3 sulphate exposure irritates the skin, eyes, and respiratory system and has negative effects on the thyroid, lungs, heart, and kidneys.
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g if 2 moles of al is stoichiometrically equivalent to 3 moles of h2, how many moles of hydrogen form from 6 moles of aluminum?
9 moles of [tex]H_{2}[/tex] can be made from complete reaction of 6 moles of Al with hydrogen chloride.
In chemistry, stoichiometry is the measurement of the ratios in which different substances or elements interact. The laws of conservation of mass and energy as well as the law of combining weights or volumes serve as the foundation for the rules used in the determination of stoichiometric relationships.
In the field of chemistry known as stoichiometry, needed quantitative data is ascertained by exploiting relationships between the reactants and/or products of a chemical process. Stoichiometry literally translates as the measure of elements because the Greek words stoikhein and metron both mean element and measure, respectively.
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CO₂
How to find the chemical or iupac name
Answer: Carbon oxide
Explanation:
(A)
Show that the atomic packing factor for HCP is 0.74
(B) For the HCP crystal structure, show that the ideal c/a ratio is 1.633.
The atomic packing factor for HCP is 0.74.
(a) APF= (no. of atoms/cells)(Volume of each atom)/ Volume of unit cell
For the HCP crystal structure, the ideal c/a ratio is 1.633.
(b) (c/2)² = a²- sk
What is a crystal structure?
In crystallography, a crystal structure is a description of the regular arrangement of atoms, ions, or molecules within a crystalline material. The ordered structure results from the inherent property of constituent particles to form symmetrical patterns that repeat along the main directions of the three-dimensional space of matter.
The smallest group of particles in the material that make up this repeating pattern is the unit cell of the structure. A unit cell perfectly reflects the symmetry and structure of the entire crystal. It is constructed by repeatedly moving the unit cell along the principal axis. The translation vector defines the nodes of the Bravais lattice.
The length of the long axis or edge of the unit cell and the angle between them is the lattice constant, also called the lattice parameter or cell parameter. Crystal symmetry is described by the space group concept. All possible symmetric arrangements of particles in three-dimensional space can be described by the 230 space group.
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how would a calculated molar mass be affected if you take into account the volume of gas particles
When measured at the same temperature and pressure, the molar volumes of all gases are the same. Different gases will have different molar masses, though. This implies that the densities of various gases will vary (different masses per unit volume).
The volume occupied by one mole of a chemical element or chemical compound at standard temperature and pressure (STP) is known as the molar volume (Vm). By dividing the mass density () by the molar mass (M), it can be calculated. One mole of any gas has a fixed volume when it is at a particular temperature and pressure.
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lead crystallizes in a face-centered cubic unit cell with an edge length of 495.08 pm. calculate the density of the metal.
The density of the metal with an edge length of 495.08pm is 549.06pm
Lead crystallizes with FCC lattice, Z = 4
√2a = 4r
r = 175.01pm
The density is given as:-
D=ZM/N0(a3) =5.616
Edge length a=404.91pm
For a BCC lattice, the 3D diagonal (l) and edge length (a) is related as:-
l=√3al=1.732×317=549.06pm
The density (d) of a crystal depends on the number of atoms occupying each unit cell, the mass of each atom (m), and the edge length of the unit cell (a). There are three types of cubic lattices,
1. Simple Cubic
2. Body centered
3. Face centered
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is the pronoun in bold reflexive or intensive? for chemistry class, i need to acquaint myself with the periodic table of elements.
For chemistry class, I need to familiarise myself with the periodic table of elements; the pronoun in bold is reflexive.
The chemical elements are arranged in columns and rows on a table known as the periodic table, sometimes known as the periodic table of the (chemical) elements. It is widely employed in physics, chemistry, and other sciences and is frequently referred to as an emblem of chemistry. It is a visual representation of the periodic law, which asserts that the atomic number-dependent properties of chemical elements follow an approximate periodic pattern. Four generally rectangular sections, referred to as blocks, make up the table. Periods and groups, respectively, are the names of the table's rows and columns. Similar chemical properties are displayed by elements in the same group on the periodic table. The nonmetallic character (keeping their own electrons), which is on the rise from left to right, is a trend that runs the length of the periodic table.
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TP is considered to be a high energy molecule. When ATP undergoes hydrolysis to ADP, how much energy is produced?
7.3 kcal/mole is required
14.6 kcal/mole is released
7.3 kcal/mole is released
21.9 kcal/mol is released
Energy-wise, the conversion of ATP to ADP is advantageous, producing -7.3 cal/mol of Gibbs-free energy.
What volume of energy is transferred form ATP to ADP?How is the free energy generated by the ATP hydrolysis utilised for cellular activity, and how much free power is released during this process?One mole of ATP hydrolyzes into Pi and ADP with a predicted G of 7.3 kcal/mole (30.5 kJ/mol).
What occurs when ATP hydrolyzes into ADP?The process of hydrolysis releases energy and transforms ATP into adenosine diphosphate whenever one phosphate group is eliminated by rupturing a phosphoanhydride bond (ADP).
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Nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia (NH3).
Which equation correctly represents this reaction?
Responses
N2 + 3H2 → 2NH3
upper case N subscript 2 end subscript plus 3 upper case H subscript 2 end subscript rightward arrow 2 upper case N H subscript 3 end subscript,
N + H → NH
upper case N plus upper case H rightward arrow upper case N H,
2NH → N + 3H2
2 upper case N H rightward arrow upper case N plus 3 upper case H subscript 2 end subscript,
2N2 + H2 → 3NH3
2 upper case N subscript 2 end subscript plus upper case H subscript 2 end subscript rightward arrow 3 upper case N H subscript 3 end subscript,
The equation is 2N2 + H2 → 3NH3 ,2 upper case N subscript 2 end subscript plus upper case H subscript 2 end subscript rightward arrow 3 upper case N H subscript 3 end subscript.
What is balanced equation ?A chemical equation that is balanced conserves mass and has an equal number of atoms of each element on both sides of the equation.
A chemical equation that is balanced has equal masses for the reactants and products, contains the same amount of atoms of each element on both sides of the equation.
Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Different elements' atom counts in the reactants and products of unbalanced chemical equations are different.
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Draw the Lewis structure for acetamide, CH3CONH2. What are the electron-pair geometry and molecular geometry around the two C atoms? What is the hybridization of each of the C atoms? What orbitals overlap to form the σ and π bonds between carbon and oxygen?
Lewis structure for acetamide, CH3CONH2. four (4) are the electron-pair geometry and molecular geometry around the two C atom. Sp3d2 is the hybridization of each of the C atoms.
When the valence bond theory failed to accurately predict molecular structure, hybridization was used to explain it. Organic compounds' bond angles have been experimentally found to be near to 109o, 120o, or 180o. The Valence Shell Electron Pair Repulsion (VSEPR) theory states that because electron couples resist one another, the bonds and lone pairs surrounding a core atom are often spaced apart at their greatest angles. The behavior of electrons inside of molecules is modeled using orbitals. Since the hydrogen atom is the only neutral atom for which the Schrödinger equation can be precisely solved, this approximation for simple hybridization is based on atomic orbitals that are similar to those found for that atom. The 2s and 2p atomic orbitals, which are akin to the excited state orbitals for hydrogen, are utilised in heavier elements including carbon, nitrogen, and oxygen. It is believed that hybrid orbitals are combinations of atomic orbitals that are overlaid on one another in different ratios.
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The chemical name of Co2(CO3)3 is:a) Cobalt carbonate b)Cobalt (III) carbonate c)Cobalt (Il) carbonate d)Cobalt (III) carbonate (II)
Answer:
Option B is the correct answer
Cobalt (III) carbonate
Explanation:
The chemical name of CO₂(CO₃)₃ is Cobalt (III) carbonate
Why is helium not the most electronegative elemnt?
[tex]\huge\underline{\red{A}\green{n}\blue{s}\purple{w}\pink{e}\orange{r} —}[/tex]
It has no electronegativity because it is a noble gas.
Explanation:
Electronegativity describes an atoms relative tendency to attract a pair of electrons in a molecule. It can be described as a property of an atom within a molecule. As helium is a noble gas it will not react to form molecules and will thus not be in a situation where it would attract a pair of electrons within a molecule.
Hope it helps you!!Answer: As helium is a noble gas it will not react to form molecules and will thus not be in a situation where it would attract a pair of electrons within a molecule.
Explanation:
Can someone please help me understand the difference between oxidation and reduction with an example. Also known as redox.
During the oxidative phosphorylation of cellular respiration, hydrogen can be considered as a reducing agent because it loses electrons while molecular oxygen is an oxidizing agent because it accepts electrons.
What are reducing and oxidizing agents?Reducing and oxidizing agents are different molecules that accept and donate electrons in chemical redox reactions such as oxygen which accept and hydrogen which donates.
Therefore, with this data, we can see that reducing and oxidizing agents are related and they work together to move electrons in different redox reactions such as occur during cellular respiration.
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Draw the product for each of the following SN2 reactions: (a) (S)-2-Chloropentane and NaSH (b) (R)-3-Iodohexane and NaCl (c) (R)-2-Bromohexane and NaCN (d) 1-Bromoheptane and NaOH
The product for each of the following SN2 reactions
The SN2 reaction is a nucleophilic substitution process in which a bond is broken and a new one is simultaneously created. The step in the reaction that determines rate involves two reacting species.
The substrate is attacked from behind in this reaction by the nucleophile. The angle between the nucleophile and the carbon-leaving group bond as it approaches the chosen substrate is 180o. Through a transition state, the carbon-leaving group bond breaks and the carbon-nucleophile bond forms concurrently.
The leaving group is now forced out of the transition state on the other side of the carbon-nucleophile link, resulting in the formation of the necessary product. The product is created by inverting the tetrahedral geometry at the central atom, which is a crucial fact to remember.
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What is the charge on the iodide in lead(IV) iodide?
The charge on lead is +4 in lead (IV) iodide. Hence, there are 4 iodine atoms each with a charge of -1.
What is lead (IV) iodide ?Lead (IV) iodide is an ionic compound formed by the donation of 4 electrons from the heavy metal lead to the iodine atom. Lead is a 14th group element with 4 valence electrons.
Iodine is a halogen having 7 valence electrons and need one more electrons to achieve octet. Thus, the halogens are more electronegative to gain an electron.
Lead (IV) iodide is PbI₄. Thus, lead shares its all 4 valence electrons each to l atoms. The charge of Pb is +4 and that of 4 I is -4. Hence, charge of one iodine is -1.
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Which of the following is NOT a multivalent ion? A. Au+
B. Ni²+
C. Zn^2+
D. Pb^2+
The Au+ is not a multivalent ion.
What is multivalent ion?
Having more than one valency or having a valency greater than three is referred to as being multivalent (comparatively more multivalent, superlatively most multivalent).
What is ion?
Ions are atoms or groups of atoms that have a different number of electrons than proton atoms. If there are more protons than electrons, the particle is a negative ion, sometimes referred to as a cation.
The all the ions are having the valence electron is 2 so they are considered as multivalent ion, Au+ having one valence electron it is not fall under multivalent ion.
Therefore, Au+ is not a multivalent ion.
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methyl benzoate ir spectrum
IR-spectrum of methyl benzoate:
The Formula of methyl benzoate is:
[tex]C_{6} H_{6} COOHCH_{3}[/tex]
1. C-O stretching
The strongest peak should be the ester C=O stretch.
This normally appears at
Conjugation with the ring moves the peak from 1750-1735[tex]cm^{-1}[/tex] to 1730-1715 [tex]cm^{-1}[/tex].
In the range of 1300-1000 [tex]cm^{-1}[/tex], there should also be one medium and two strong bands.
The two strong bands arise from the symmetric and antisymmetric C-O stretches of the ester COO group, and the weaker band is the ether CO stretch of the OC[tex]H_{3}[/tex]group.
2. C-C Stretching
Characteristic medium-strength C-C stretching bands in the 1600–1585 [tex]cm^{-1}[/tex] and 1500–1400 [tex]cm^{-1}[/tex] regions of the benzene ring are present.
3. C-H bending
At 750-700 [tex]cm^{-1}[/tex] and 710-690 [tex]cm^{-1}[/tex], the monosubstituted phenyl group exhibits distinctively strong bending vibrations.
1.The methyl group usually shows a weak band at 1380 [tex]cm^{-1}[/tex] and a medium band at 1260 [tex]cm^{-1}[/tex].
4. C-H Stretching
The weak aromatic C-H stretch typically occurs between 3100 and 3000 [tex]cm^{-1}[/tex].
The aliphatic C[tex]H_{3}[/tex]group shows stronger symmetric and antisymmetric stretches at 2960 [tex]cm^{-1}[/tex] and 2870 [tex]cm^{-1}[/tex] .
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give the iupac name for the following compounds
Name each of the following chemicals using its IUPAC designation. ethyl 1,3 methyl 1,5 cyclohexane, 2-propyl three decane A4 heptane Dimethyl-7-hexane nonane
The longest chain of carbons in a molecule, whether it is a continuous chain or a ring, joined by a single bond, is named according to the IUPAC nomenclature system. All deviations, whether multiple bonds or atoms other than carbon and hydrogen, are identified by prefixes or suffixes in accordance with a particular set of priorities.
How can the IUPAC name be created from a structure?Yes! Search for all of your molecules by selecting the Explore Data tab and then clicking the green Search button at the bottom of the screen. Choose to display the IUPAC field from the Structure Fields section by clicking Customize your report. Click
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Which ion with a +3 charge has the electron configuration 1s2 2s2 2p6 3s2 3p6? Which ion with a −1 charge has this configuration?
Scandium ion with +3 charge has the electronic configuration 1s2 2s2 2p6 3s2 3p6 and Chlorine ion with a -1 charge has the same 1s2 2s2 2p6 3s2 3p6 electronic configuration.
The Electronic configuration of Scandium is [Ar]4s2 3d1 which 1s2 2s2 2p6 3s2 3p6 4s2 3d1, but when we remove three electrons from the outermost shell of the Scandium, according to Aufbau’s principle the electrons are removed from 4s and 3d shell to give us the required Scandium ion with +3 charge with electronic configuration 1s2 2s2 2p6 3s2 3p6. Similarly, the electronic configuration of Chlorine is [Ne] 3s² 3p⁵ which is 1s2 2s2 2p6 3s2 3p5, but when we add one electron to the outermost shell of the Chlorine, according to Aufbau’s principle the electron added to 3p shell to give us the required Chlorine ion with -1 charge with electronic configuration 1s2 2s2 2p6 3s2 3p6
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consider this reaction: 6 co2 6 h2o light c6h12o6 6 o2 if you actually produced 30g of c6h12o6 what would be the percent yield? calculate the theoretical yield from having 2.38 x 102 g of h2o, 18.6 moles of co2.
The potential yield is composed of 608.22 grams of C6H12O6 and 531.2 grams of oxygen.
Describe the mole.The quantity of a substance that contains precisely 6.02214076 X 1023 of its essential components is called a mole.
A material is considered to contain a mole of a substance if it has the same mass as 12.000 g of 12C and the same number of elementary particles as atoms.
Find the theoretical yield of the reaction:
Here is the response: C6H12O6 + O2 = 6 CO2 + 6 H2O.
A mass of 2.38 x 102 g of water is given.
18.6 moles of CO2 are provided.
C6H12O6 is formed from 6 CO2 and 6 H2O.
6 moles of water. C6H12O6 in 1 mole
0.6 moles of C6H12O6 are equal to 1 mole of water.
18 g of water equals 276/6 g of C6H12O6.
? gram of C6H12O6 = 2.38*102 gm of H2O
C6H12O6 is 2.38+102+276/618 = 608.22 grams.
1 mole of C6H12O6 is equal to 276g, so 1 mole of C6H12O6 is equal to 608.22g, which is equal o 2.2 moles of C6H12O6.
O2 is equal to 6 moles of CO2.
Moles of CO2 and O2 are equal. 18.6 moles of CO2 are equal to 18.6 moles of O2.
O2 in a mole equals 32 grams.
18.6 moles of oxygen are equal to? gm (18.6*32) or 531.2 gms of oxygen. The potential yield is composed of 608.22 grams of C6H12O6 and 531.2 grams of oxygen.
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STOICHIOMETRY Interconverting number of atoms and mass of compound that contains million (1.ox106 Calculate the mass of glucose (C6H,206, carbon atoms Be sure your answer has unit symbol if necessary, and round it to 2 significant digits
Stoichiometry interconverting number of atoms and mass of compound that contains million (1.ox106), the mass of glucose (C6H,206, carbon atoms is 110.00 gm.
The relationship between the quantities of reactants and products prior to, during, and after chemical processes is known as stoichiometry. Stoichiometry is based on the law of conservation of mass, which states that the sum of the masses of the reactants and products must equal one another. This realization led scientists to conclude that the ratio of positive integers is typically formed by the relationships between the quantities of the reactants and products. This means that the amount of the product may be determined if the amounts of the individual reactants are known. On the other hand, if the amount of one reactant is known and the amount of the products can be computed using empirical data, the amount of the other reactants can likewise be calculated. This is seen in the following figure, where the balanced equation reads: CO2 + 2 H2O CH4 + 2 O2
In this reaction, two molecules of oxygen gas combine with one methane molecule to form carbon dioxide and two molecules of water. A full combustion is demonstrated in this chemical equation. To ascertain the quantity of products and reactants generated or required in a particular process, stoichiometry examines these quantitative correlations. Reaction stoichiometry is the description of the quantitative interactions between substances as they take part in chemical processes.
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a voltaic cell is based on the reaction between ag+(aq) and ni(s), producing ag(s) and ni2+(aq).
The overall reaction of the voltaic cell is written as; [tex]Ni(s) + 2Ag^+(aq) ----- > Ni^{2+} (aq) + 2Ag(s)[/tex]
What is a voltaic cell?We know that a voltaic cell is the kind of cell that is obtained when there is a reaction that is spontaneous. It is one of the kinds of electrochemical reactions that we have. We know that the cell potential is positive in this case. The reaction would have a cathode and an anode.
The anode is the point from which current enters into the cell and the cathode is the part of the cell from which current leaves the cell. We would now have to proceed to observe the reaction of the anode and the cathode.
Anode; [tex]Ni(s) ----- > Ni^{2+} + 2e[/tex]
Cathode; [tex]2Ag^+ + 2e ----- > 2Ag[/tex]
Thus the anode of the cell can be seen as the nickel while teh cathode of the cell is the silver. Electrons would move from the nickel part to the silver part of the cell.
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How could a lake be considered a part of one of Earth’s spheres during one season and part of another sphere during another season?
The interactions between Earth's five systems—the geosphere, biosphere, cryosphere, hydrosphere, and atmosphere—create the conditions we are accustomed to.
What is Atmosphere?On Earth, there are five major systems, or spheres. The Earth's interior and surface, which are both formed of rocks, make up the first system, the geosphere.
The second system is made up of the little area of the planet that may sustain life; this area is known as the biosphere. The third system contains the hydrosphere, or regions of Earth that are completely covered with water.
The fourth system is the atmosphere, a gaseous envelope that maintains the planet's temperature while also supplying carbon dioxide for photosynthesis and oxygen for breathing.
Therefore, The interactions between Earth's five systems—the geosphere, biosphere, cryosphere, hydrosphere, and atmosphere—create the conditions we are accustomed to.
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How should spill cleaning materials be discarded? Select one: a)Leave them in the fume hood for the instructor: b)Rinse the cleaning materials in the sink, then place them in the trash can. c)Discard all components in the broken glats container d)Seal in a labeled plastic bag; then place in the solid waste container
Spill cleaning materials can be discarded by Seal it in a labeled plastic bag; then place in the solid waste container. The correct answer is D.
Spill cleaning material should be disposed of by placing them in the solid waste container after being sealed in a plastic bag with a label. This method of disposal is the safest and most ethical because it keeps the materials from contaminating or damaging the environment. It is crucial to clearly identify the bag with the contents and the date, and to properly discard it in accordance with local laws. Spill cleaning supplies should not be disposed of in other ways, such as by leaving them in the fume hood for the teacher to use or by rinsing them in the sink.
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in a redox-reaction that uses starch as an indicator, the solution turns blue-black. what can we say about that reaction?
Answer:
The reaction is nutride-cullic and sees all math about our lives.
Explanation:
Prediction: If an increase in temperature increases the rate of evaporation of
water, then an increase in average daily temperatures will decrease lake water
levels over a two-year period.
Which of the following best describes this prediction?
OA. The prediction is useful because it specifies what observations
will be made to test a hypothesis.
OB. The prediction is not useful because scientists are skeptical of
anyone who claims to see into the future.
OC. The prediction is useful because it proves that the hypothesis is
true before any data have been collected.
OD. The hypothesis is not useful because it is too long as a sentence
and therefore difficult to read.
A. The prediction is useful because it specifies what observations will be made to test a hypothesis.
A prediction is a statement about what is expected to happen based on a particular hypothesis. In this case, the prediction is that an increase in average daily temperatures will decrease lake water levels over a two-year period. This prediction is useful because it specifies a clear and specific observation that can be made to test the hypothesis that an increase in temperature increases the rate of evaporation of water.
