Sunlight exposure is what gave these maize kernels their color. In the absence of sunshine, the maize kernels remain yellow; in the presence of sunlight, they turn red.
Which sequence best exemplifies how multicellular creatures get increasingly complex as they become more organized?In multicellular organisms, complexity rises in the following order: Subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, creatures, populations, communities, and the biosphere are all included in this.Based on historical data and analytics methods like statistical modeling and machine learning, predictive analytics is a subcategory of data analytics that aims to make predictions about future outcomes.Sunlight exposure is what gave these maize kernels their color. In the absence of sunshine, the maize kernels remain yellow; in the presence of sunlight, they turn red.To learn more about Sunlight exposure refer to:
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SEP Carrying out Investigations A student adds 1 L of water to 1 mol of sodium chloride. Will the result be a 1 M solution of sodium chloride and water ? Why or why not ?
Answer:
Yes, the result would be a 1 M solution of sodium chloride and water. This is because when 1 liter of water is added to 1 mole of sodium chloride, it will dissolve, resulting in a 1 M solution of sodium chloride and water.
you found an unknown substance and it is green-blue in color, it is a solid, and is not malleable. the unknown substance has a melting point of 24.3 oc and a density of 5.621 g/m3. the unknown sample is flammable and reacts with oxygen gas to form an oxide. determine the volume in units of hl of this unknown sample if you have 14.5. grams. keep in mind significant figures and only input a numerical value.
An unknown substance and it is green-blue in color, it is a solid, and is not malleable. The volume of this unknown sample if you have 14.5 grams is 2.75 × 10⁶ ml.
The properties of the substance is : green-blue in color, it is solid, and is not malleable.
The formula for the density is given as :
The density = mass / volume
where,
The density = 5.621 g/m³ = 5.261 × 10⁻⁶ g/ml
The mass = 14.5 g
The volume is = mass / density
The volume = 14.5 / 5.261 × 10⁻⁶
The volume = 2.75 × 10⁶ ml
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mium and zinc are used in a cell to produce cadmium metal. using the standard reduction potentials shown, calculate the cell potential and identify the type of ce
Cd2+(aq) + 2e- → Cd(s) E° = -0.403 V
Zn2+(aq) → Zn(s) E° = -0.761 V
Cell Potential = E° (cathode) - E° (anode)
Cell Potential = -0.403 V - (-0.761 V)
Cell Potential = 0.358 V
This is an oxidation-reduction or redox reaction, since there is an oxidation (Zn2+ → Zn) and a reduction (Cd2+ + 2e- → Cd) reaction occurring.
Type of Cell: Galvanic Cell
What is Galvanic Cell?
A galvanic cell is an electrochemical cell in which a spontaneous redox reaction produces an electric current. It consists of two half-cells: an anode (negative electrode) and a cathode (positive electrode). The two half-cells are connected by a salt bridge or a porous membrane that allows the flow of ions between them. The anode and cathode are typically made from different metals or metal salts and the electrons produced by the redox reaction flow from the anode to the cathode, thus generating an electric current.
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a student adds a 1g sample of an unknown, brittle solid to distilled water, stirs the mixture, and then measures its conductivity. the student repeats this procedure with more samples of the unknown solid and then produces the graph above. which of the following statements about the graph and the properties of the solid is correct? The increase in conductivity indicates that the unknown is an ionic solid that dissociates into ions when it dissolves in waterThe increase in conductivity indicates that the unknown is a network covalent solid that ionizes in waterThe straight line plot indicates that the unknown solid is infinitely soluble in waterThe straight line plot indicates that the unknown solid has a very low solubility in water.
The increase in conductivity indicates that the unknown is an ionic solid that dissociates into ions when it dissolves in water.
What is meant by conductivity?
The ability to conduct or transmit energy, such as the electrical resistivity's inverse.Conductivity and resistance are important characteristics of materials that determine how much resistance a typical cube of material has to current flow.Electrical resistance and conductance are complementary broad qualities that determine an object's resistance to an electric current.The ability of an aqueous solution to convey an electric current is measured by its conductivity.If these materials are coupled to a power source, electrons can move freely and smoothly between two points.For conducting electricity, metals like copper, iron, gold, aluminium, and silver work best.To learn more about conductivity refer to
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Which conditions will increase the rate of a chemical reaction? a. decreases temperature and decreased concentration of reactants b. decreased temperature and increased concentration of reactants c. increased temperature and decreased concentration of reactants d. increased temperature and increased concentration of reactants
Option d. increased temperature and increased concentration of reactants will increase the rate of a chemical reaction.
What is the rate of a chemical reaction?The rate of a chemical reaction can be defined as the speed at which a chemical reaction occurs, which is typically expressed in terms of the change in concentration of a reactant or product over time.
Therefore, with this data, we can see that the rate of a chemical reaction is a measure of how quickly the reactants are converted into products in a chemical process.
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How much is a 0.05 change worth on the PH scale. 8.12-8.07
Answer: The solution will be 1.122018454x more acidic
Explanation: It's pretty simple, so since pH uses the Log scale, just do [tex]10^{0.05}[/tex]
And you'll get the answer. Also this gets less acidic since pH goes down.
Hope this helps!
What structural features do you think contribute to a high thermal conductivity?
HURRY PLEASE!!!!
The structural features which contributes to a high thermal conductivity are the direction of travel of heat and the nature of materials.
What is Thermal conductivity?This is referred to as a measure of its ability to conduct heat or current and it is dependent on some factors such as the nature of the materials.
For example , metals conduct heat and electricity easily because the materials allow free electrons to move between the atoms and also the direction of travel of heat which is towards them is also a factor in this regard.
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Which of the following steps would be required to convert between the masses of any two substances involved in the same chemical reaction?
The following steps would be chemical bonding,1. Calculate the molar mass of each substance.2. Calculate the number of moles of each substance.
What is the chemical bonding ?
Chemical bonding is the process of forming chemical bonds between two atoms.Atoms are held together by forces called chemical bonds to form compounds.. Chemical bonds can be covalent, ionic, or metallic. Covalent bonds involve atoms sharing electrons, while ionic bonds involve the transfer of electrons from one atom to another. Metallic bonds, on the other hand, involve the sharing of electrons between metal atoms. The type of bond formed depends on the electronegativity of the atoms involved, which is a measure of how strongly an atom attracts electrons. In general, atoms with higher electronegativity will form covalent bonds, while atoms with lower electronegativity will form ionic bonds.
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identifying the 5 types of chemical reactions identify each of the reactions below as one of the 5 types of reactions (rxn): synthesis reaction decomposition reaction single replacement reaction double replacement reaction combustion reaction answer key
5 types of chemical reaction are as follows with example- decomposition reaction, single replacement reaction, double replacement reaction, combustion reaction.
1. Fe + O2 = FeO: This is a synthesis reaction. It involves the formation of a new compound (FeO) from simpler reactants (Fe and O2).
2. 2H2O2 = 2H2O + O2: This is a decomposition reaction. It involves the breakdown of a more complex compound (H2O2) into simpler products (H2O and O2).
3. Zn + CuSO4 = ZnSO4 + Cu: This is a single replacement reaction. It includes swapping out one ingredient in a compound for another. In this case, Zn replaces Cu in the compound CuSO4.
4. Fe(NO3)2 + K2Cr2O7 = FeCr2O7 + 2KNO3: This is a double replacement reaction. It involves the exchange of positive ions between two compounds to form two new compounds.
5. CH4 + 2O2 = CO2 + 2H2O + heat: This is a combustion reaction. It involves the burning of a hydrocarbon (CH4) in the presence of oxygen to produce carbon dioxide, water, and heat.
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Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then further classify each as a main-group (representative) element, transition metal, or inner transition metal: (a) uranium (b) bromine (c) strontium (d) neon (e) gold
Element, transition metal, or inner transition metal is given below.
What is periodic table?The periodic table is a tabular arrangement of the chemical elements organized on the basis of their atomic numbers, electron configurations, and recurring chemical properties. It is one of the most important tools in chemistry and is used for predicting the properties of different elements and their compounds. The elements are listed in order of increasing atomic number, which is the number of protons an element has in its nucleus.
(a) Uranium: Metal, Inner Transition Metal
(b) Bromine: Nonmetal, Main-group Element
(c) Strontium: Metal, Main-group Element
(d) Neon: Nonmetal, Main-group Element
(e) Gold: Metal, Transition Metal.
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ariel shabtaicl 6.1 bonding energy and bond types868210 of 18question 10 listenice, h2o(s), is classified asan ionic compounda molecular compounda homogeneous mixturea heterogeneous mixturehide toolbar zoom: standard
H2O(s), or water in its solid state, is classified as a molecular compound
A molecular compound is a type of chemical compound made up of molecules. These molecules are composed of atoms from two or more different elements that are chemically bonded together. The atoms are held together by covalent bonds, in which electrons are shared between atoms. Examples of molecular compounds include water (H2O), carbon dioxide (CO2), and sugar (C12H22O11).The chemical structure of water, H2O, consists of two hydrogen atoms (H) and one oxygen atom (O). The chemical bond between the hydrogen and oxygen atoms is a covalent bond, in which electrons are shared between the atoms. The molecule has a bent shape with an angle of 104.5 degrees between the hydrogen atoms.
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the graph shows all of the stable isotopes of elements according to the numbers of protons and neutrons in their nuclei. a graph titled zone of nuclear stability with number of protons from 0 to 80 on the x-axis with number of neutrons on the y-axis from 0 to 140. there are two lines, one with a slope of 1 from (0, 0). the other line has points of (20, 24), (40, 52) and (60, 120) labeled stability zone. which statements are supported by the graph? check all that apply.
1. For large atoms, more neutrons than
2. protons are needed to be stable.
Nuclei that have 90 or greater protons are always radioactive.
Isotopes are two or more types of atoms that have the same atomic number and place in the periodic table but differ in nucleon numbers because their nuclei contain differing quantities of neutrons. The atomic number of an element on the Periodic Table is determined by the number of protons in its nucleus. Carbon, for example, contains six protons and has atomic number 6.
Isotopes have chemical characteristics that are same but have drastically distinct nuclear properties. For example, hydrogen has three isotopes. Isotopes are used to define human illness, identify illegal drugs at international borders, sterilise medical equipment, and power space exploration batteries. Isotopes are also used in agriculture, astronomy, biology, chemistry, materials science, medicine, and nuclear safety studies.
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when chlorine is added to water, a dissociation occurs. when we add cl2 (chlorine) h2o (water), we get a reaction which leaves us with hocl (hypochlorous acid) hcl (hydrochloric acid). how much of each is created is dependent on water temperature, and especially on water ph. hypochlorous acid is the active, killing form of chlorine. this is what does the real sanitizing work in your pool water. the chlorine molecule or ion kills microorganisms by slashing through the cell walls and destroying the inner enzymes, structures and processes. when this occurs, the cell has been deactivated, or oxidized. the hypochlorous molecule continues this slash
Chlorine reacts reversibly with water to give a mixture of hypochlorous acid and hydrochloric acid.
Cl2+H2O⇔HOCl+HCl
Because of this reaction, it is able to act as a disinfectant for water sterilization.
What is sterilization?
Sterilization is a process that removes, kills, or inactivates all life forms (especially microorganisms such as fungi, bacteria, spores, and unicellular eukaryotic organisms) and other biological agents, such as prions, present in or on a particular surface, object, or fluid.Sterilization can be achieved in a variety of ways, including heat, chemicals, irradiation, high pressure, and filtration. Sterilization differs from disinfection, and pasteurization in that these methods reduce rather than eliminate all life forms and biological agents present. After sterilization, the object is referred to as sterile or aseptic.To know more about sterilization, click the link given below:
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Name two substances that when reacted together, will produce the soluble salt, sodium nitrate
Answer:
Sodium nitrate can be produced by reacting sodium hydroxide (NaOH) and nitric acid (HNO3) together.
Explanation:
Sodium nitrate is produced by the reaction between sodium chloride (NaCl) and nitric acid (HNO3). The chemical equation for this reaction is:
NaCl + HNO3 → NaNO3 + HCl
In this reaction, sodium chloride (table salt) and nitric acid react to form the soluble salt, sodium nitrate and hydrogen chloride as a byproduct. The reaction is exothermic and generates heat.
Silver nitrate and sodium chloride are both soluble
HCl(aq) + Ca(s) CaCl(aq) + H₂(g)
For the chemical reaction 2HCl(aq) + Ca(s) → CaCl2(aq) + H2(g), Phases are aq (aqueous), s (solid), g (gas)
Identify the phases of HCl(aq) + Ca(s)→CaCl2 (aq) + H2(g)
A solution made up of molecules dissolved in water is referred to as an aqueous (aq) solution. Any substance that is made up of molecules and is held together in a rigid, organized form is referred to as a solid (s).
A substance that is made up of molecules that are not bonded together in an organized form and are free to move about the surrounding area is referred to as gas (g).
According to the provided chemical equation, solid calcium (Ca) and aqueous hydrochloric acid (HCl) react to produce aqueous calcium chloride (CaCl2) and hydrogen gas (H2).
Solid calcium is made up of molecules held together in an organized, rigid structure, whereas aqueous hydrochloric acid is made up of molecules that are dissolved in water.
Aqueous calcium chloride and hydrogen gas are produced when these two chemicals react. Hydrogen gas is made up of molecules that are not held together in an ordered form and are free to move around the environment, whereas aqueous calcium chloride is made up of molecules that are dissolved in water.
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How do solvents affect polymers?
Solvents affect the polymers in way that they affect the strength of non-bonding interactions, which in return control the formation of supramolecular polymers in solution.
Solvents affect the polymers in way that they affect the strength of non-bonding interactions, which in return control the formation of supramolecular polymers in solution. Solvent effects and implications/parameters measured in supramolecular polymer systems are selectively reviewed. A rather new solvent scale, solvation ability (SA), which is based on the balance point between extended and stacked polymers is then introduced.
One of the most common processes used to produce polymer nanoparticles, is the solvent-displacement method, wherein the polymer is first dissolved in a "good" solvent and then the solution is mixed with an "anti-solvent". The processability of the polymer is therefore determined by polymer's structural and transporting properties in solutions of pure solvents and at the intermediate compositions.
If we put a polymer molecule into a pure solvent, three things might happen to it.
-it might curl up on itself
-it might not really notice/react with the solvent
-it might prefer the solvent used, to itself, and stretch out.
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Dr. Clark works with people who have had a heart attack. She is trying to help them
make good diet and exercise choices to reduce the possibility of having another
heart attack in the future. She is most likely a(n)
A) counseling psychologist.
B) educational psychologist.
C) health psychologist.
D) social psychologist.
She most likely works as a health psychologist because she combines resistance training with cardio exercise (jogging, swimming, and bicycling) (moderate weightlifting).
Can physical activity lessen heart attacks?A healthy heart is mostly dependent on physical activity. It's one of your best tools for building up your heart muscle, controlling your weight, and defending your arteries against damage brought on by high blood pressure, blood sugar, and cholesterol that can result in a heart attack or stroke.
Which activity is most beneficial for mental health?Aerobic exercise, such as jogging, swimming, cycling, walking, gardening, and dancing, has been shown to lessen anxiety and depression.
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Which statement explains why the speed of some chemical reactions is increased when the surface area of the reactant is increased?
a. This change increases the density of the reactant particles.
b. This change increases the concentration of the reactant.
c. This change exposes more reactant particles to a possible collision.
d. This change alters the electrical conductivity of the reactant particles.
The statement c. This change exposes more reactant particles to a possible collision explains why the speed of some chemical reactions is increased when the surface area of the reactant is increased.
What is the relationship between the speed of chemical reactions and surface area?The surface area of a reactant is directly related to the speed of a chemical reaction because as the surface area increases, the speed also increases due to the larger surface area allowing more particles to come into contact.
Therefore, with this data, we can see that the speed of a chemical reaction is directly proportional to the surface area of its reactants.
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Time Left 98 minutes Item 9: Question The conversion of lodocyclohexane to cyclohexene occurs via the following 2-step mechanism H H H H H + --- 0 1 H H H H H This conversion of lodocyclohexane to cyclohexene would be classified as a Ny reaction Submit Submit and Next elimination substitution Mark this question for later review addidtion Skip to Previous Skip to Next →
An elimination reaction would be the conversion carbon of lodocyclohexane to cyclohexene. An elimination reaction is a chemical process that involves the removal of two substituents.
from the same carbon molecule, resulting in the production of a double bond. Lodocyclohexane is transformed to cyclohexene in two steps by the removal of two substituents, culminating in the creation of a double bond. This process is unique to elimination reactions, as opposed to substitution reactions, which entail the substitution of one substituent with another.double bond. Lodocyclohexane is transformed to cyclohexene in two steps by the removal of two substituents, culminating in the creation of a double bond.l the substitution of one substituent with another.double bond. Lodocyclohexane is transformed to cyclohexene in two steps by the removal of two substituents,.
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In the quantum mechanical model of the atom, and electron is viewed as a wave-particle that occupies a three-dimensional space near the nucleus.
The movement of an electron around the nucleus is described by a mathematical function, which is called or known as an atomic wave or an atomic orbital. Hence the answer is - a wave and an orbital.
In the concept of quantum mechanical model of the atom, electrons (negatively charges particles) are seen as a wave substances/matters which cover a 3-d space around/near the nucleus. The motion of these electrons is explained by a wave function, that is called or known as an atomic orbital.
Wave function : A wave function is a mathematical function which tells the position of any particular electron around it's nucleus.
Atomic Orbital : It too, explains the position of any particular electron around it's nucleus and also the wave behavior of that electron of any specific atom.
The Quantum Mechanical model of an atom is used to explain/calculate the position and functioning of any particular electron and also explains the different energy levels such as - orbitals; energy sublevels; and principal energy levels.
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The correct question should be:
In the quantum-mechanical model of the atom, an electron is viewed as a wave-particle that occupies a three-dimensional space near the nucleus. the movement of the electron is described by a function, which is also called an atomic _______.
(12) SEP Develop Models Show the periodicity of atomic size vs. atomic number by making a line graph that compares atomic radii across two periods.
According to the electronic configuration, along a period as the atomic number increases the atomic size decreases as electrons are added to the same shell.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
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A student pushes a box with a force of 15 newtons (N) to make it slide across the floor. Once the box starts moving, a frictional force of 5 N acts upon it. If the student continues to push the box with a force of 15 N, what will happen to the box?
If the student continues to push the box with a force of 15 N, the box will continue to move with a force of 10N. Frictions acts in the opposite direction of motion.
What is force?The definition of force is the pushing and pulling of anything. Push as well as pull are the result of two objects interacting with one another. Stretch and crush are two more phrases that can be used to describe force.
A student pushes a box with a force of 15 newtons (N) to make it slide across the floor. Once the box starts moving, a frictional force of 5 N acts upon it. If the student continues to push the box with a force of 15 N, the box will continue to move.
Therefore, box will continue to move.
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Ground turkey must be cooked to an internal temperature of 165°F (74°C). Why must turkey be cooked to this minimum temperature?
A chemical becomes hazardous waste when you no longer need it. Click on the examples of Hazardous Waste. Click "Submit" to advance. Abandoned chemicals Chemicals that can't be used or are unwanted Residues in chemical containers Unlabeled chemicals Chemicals in deteriorating containers Food Conflicting labels (more than 1 or a label that does not match contents) Pipette tips not contaminated with hazardous materials
Examples of hazardous waste are: Abandoned chemicals, Chemicals that can't be used or are unwanted, Residues in chemical containers, Unlabeled chemicals, Chemicals in deteriorating containers
"Food" and "Pipette tips not contaminated with hazardous materials" are not examples of hazardous waste. Hazardous waste is defined as any material that is potentially dangerous or harmful to human health or the environment. They are regulated by the government and require special handling and disposal. A hazardous material, also known as a hazardous substance or a dangerous good, is any material that poses a potential threat to human health or the environment if not handled or disposed of properly. These materials may be in the form of liquids, solids, gases, or chemicals and can include things like pesticides, acids, explosives, radioactive materials, and toxic substances
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CAN SOMEONE HELP WITH THIS QUESTION?✨
The volume of a piece of copper with a weight of 48.218g is 5.45mL.
How to calculate volume using the graph?A graph is a data chart (graphical representation of data) intended to illustrate the relationship between a set (or sets) of numbers (quantities, measurements or indicative numbers).
According to this question, a graph is shown above with mass (g) on the y axis and volume (mL) on the x axis.
Based on the data provided in the graph, the following expression was given:
y = 8.8521x
y represents the mass while x represents the volume
48.218g = 8.8521x
x = 48.218 ÷ 8.8521
x = 5.45mL
Therefore, 5.45mL is the volume at that weight.
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complete the following road map for converting grams of a to grams of b where a and b are two species in a chemical reaction.
The formulas for converting grams to grams of b in situations where a and b are two species involved in a chemical reaction are as follows:
What is the road map for converting grams to grams?Write the balanced chemical equation for the reaction of converting species A to species B.Determine the stoichiometric coefficient of species B in the balanced equation.Use the molar mass of species B to convert the number of moles of B to grams.Use the balanced chemical equation and the molar ratios to determine the number of moles of B produced from a given number of moles of A.Use the molar mass of species A to convert the number of moles of A to grams.Use the stoichiometry from the balanced equation to determine the number of moles of B produced from a given number of moles of A.Use the molar mass of species B to convert the number of moles of B to grams.Compare the initial amount of A and the final amount of B to check if the reaction was complete or not.Example:A + B → C + Dmolar mass of B = 42 g/mol2 moles of B are produced for every 1 mole of A.5g of A is reacted.10g of B is produced.To learn more about reaction refer:
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How many liters of a 0.26 M solution of Na₂MnO4 would contain 0.38 mole of Na₂MnO4?
The molarity of the solution (0.26 M). The result is 1.46 L, which is the volume of the solution that would contain 0.38 mole of Na₂MnO4.
What is molarity?Molarity is a unit of measure used to indicate the concentration of a solute in a solution. It is expressed in moles of solute per liter of solution (mol/L). This measure is useful for describing the amount of a particular chemical species present in a solution, as well as for determining the amount of a reactant or product that is produced in a chemical reaction. Molarity is also used to calculate the amount of a substance that must be added to a solution to achieve a desired concentration.
The number of liters of a 0.26 M solution of Na₂MnO4 that would contain 0.38 mole of Na₂MnO4 can be calculated using the following equation:
Volume (L) = moles (mol) / Molarity (M)
Therefore, the volume of a 0.26 M solution of Na₂MnO4 that would contain 0.38 mole of Na₂MnO4 is:
Volume (L) = 0.38 mol / 0.26 M
Volume (L) = 1.46 L
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Which of the following has the smallest radius?
A. I
B. I-
C. Br
D. Br-
Answer:
The answer is B. I-.
Explanation:
The radius of an atom depends on its electron configuration and can be influenced by various factors such as the number of electrons, the electron shielding effect, and the effective nuclear charge.
The size of an ion can be estimated by considering the number of electrons it has. A positively charged ion or a negatively charged ion will have a different size than the neutral atom because the number of electrons has changed. A positively charged ion will be smaller because the protons in the nucleus attract the electrons more strongly, whereas a negatively charged ion will be larger because the extra electrons will shield each other from the positive charge of the nucleus.
In this case, we can compare the radii of I- and Br-. The element bromine (Br) has a higher atomic number than iodine (I), meaning it has more electrons and a larger nucleus. However, Br- is a negatively charged ion, while I- is a neutral atom. The extra electrons in Br- will shield each other from the positive charge of the nucleus, making Br- larger than I-.
Therefore, the smallest radius among the choices is B. I-.
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Have a great day.
In the winter, a heated home in the Northeast might be maintained at a temperature of 67 °F. What is this
temperature on the Celsius and Kelvin scales?
(Round your answer to the nearest whole number.)
°C
K
You add 9.6g of iron to 23.60mL of water and observe that the volume of iron and water together is 24.82mL. Calculate the density of iron…. Express in Value & Units
Answer:
7.87g/mL
Explanation:
density is mass/volume...
you add 9.6g of iron. that is the mass
the water increases by 1.22ml, that is the volume
9.6g/1.22ml = 7.87g/mL
