a. Solar Energy and the Cell. By connecting a photovoltaic solar panel to a hydrogen fuel cell, the following may be accomplished: Photovoltaic panels or mirrors are used to concentrate solar energy.
Solar radiation is used by photovoltaic panels to convert sunlight into electrical energy. This energy can be turned into electricity or stored as thermal energy in batteries. Solar cells, often known as photovoltaic cells, convert sunlight directly into electricity. The term photovoltaics (abbreviated PV) comes from the photovoltaic effect, which is the process of converting light (photons) to energy (voltage). Photovoltaic solar energy is a type of clean, sustainable energy that creates electricity via the use of solar radiation. It is based on the photoelectric effect, which happens when specific materials absorb photons (light particles) and release electrons, resulting in the photoelectric effect.
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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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A chemist mixed two substances together: a colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right. Is the ending substance the same substance as the colorless liquid? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions. Starting substances An ending substance Properties: colorless liquid sharp smell Properties: white solid no smell'
The material is the same as the smelly, colorless liquid. The repeating group of atoms shown above on the right and the other ending substance were both present in the substance that had an odorless colorless liquid and a strong scent and a white solid with no smell.
A mixture in chemistry is a compound made up of two or more distinct chemicals that are not chemically linked. A mixture is the physical blending of two or more substances while maintaining their distinct identities. It can take the shape of solutions, suspensions, or colloids.
Chemical components and compounds, among others, can be mechanically blended or mixed to create mixtures, but there is no chemical bonding or other type of chemical change, thus each ingredient retains its unique chemical characteristics.
Even though the constituents do not undergo any chemical changes, a mixture's physical characteristics, such as its melting point, may be different from those of the parts. Physical methods can be used to separate some mixes into their constituent parts.
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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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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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how do you know how to dispose of chemical waste? check all that apply. select one or more: listen carefully to the prelab instructions read container labels in the designated waste area look at the colors in the waste containers to see which one it matches ask your instructor for assistance
The appropriate ways to know how to dispose of chemical waste are:
What is chemical waste?
Chemical waste is any material that is discarded or intended to be discarded as a result of a chemical reaction, experiment, or process. Chemical waste can come in many forms, such as liquids, solids, gases, or sludges, and can be hazardous or non-hazardous.
Listen carefully to the prelab instructionsRead container labelsAsk your instructor for assistanceIt is important to follow proper disposal procedures for chemical waste to ensure safety and compliance with regulations. Preamble instructions, container labels and consulting with the instructor or supervisor are the best ways to know how to dispose of chemical waste.
It is also important to be aware of the color-coding system of waste containers in your lab and to match the waste with the appropriate container.
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A 0.3205g sample of CaCO3 was dissolved in HCl and the resulting solution diluted to 250.ml in a volumetric flask. A 25 mL sample of the solution required 18.75mL of EDTA solution for titration to the Eriochrome Black T end point. What is the concentration of Ca2+ (mol/L) in the 250.0ml of CaCl2 solution? How many mole of Ca2+ are contained in a 250mL sample? How many mole of EDTA are contained in the 18.75mL used for titration? What is the concentration (mol/L) of the EDTA solution?
0.3205g sample of CaCO3 was dissolved in HCl and the resulting solution diluted to 250.ml in a volumetric flask. [tex]Ca^{2+}[/tex]=0.01281M[tex]Ca^{2+}[/tex]
What is meant by HCl ?
Put around 100 ml of water in a 1000 ml volumetric flask that has been cleaned and dried. 8.5 cc of concentrated hydrochloric acid should be added while swirling continuously.700 ml more of water should be added, mixed, and let to cool to room temperature.In the food, textile, metal, and rubber sectors, hydrogen chloride (HCl) is frequently employed as a bleaching agent to neutralize alkaline substances. When discharged into the soil, it is neutralized, and when it comes into contact with water, it hydrolyzes quickly.For every 100 mL of water, you'll need 10 mL of concentrated hydrochloric acid (HCl) to achieve the required concentration in order to create a 10% HCl solution.[tex]Ca^{2+}[/tex] =0.3205g CaCO3∗1mol / CaCO3100.0869g
CaCO3∗1mol[tex]Ca^{2+}[/tex]1mol / CaCO30.250L
[tex]Ca^{2+}[/tex]=0.01281M[tex]Ca^{2+}[/tex]
How many mole of [tex]Ca^{2} +[/tex] are contained in a 250mL sample?
[tex]n_Ca{^{2+} }[/tex] = (0.250 L) (0.01281 mol / L [tex]Ca^{2+}[/tex])
[tex]n_Ca^{2+}[/tex] = 3.203×[tex]10^{-3}[/tex]mol[tex]Ca^{2+}[/tex]
[tex]n_E_D_T_A[/tex] = 0.025L[tex]Ca^{2+}[/tex] ∗ 0.01281mol / L [tex]Ca^{2+}[/tex] ∗ 1molEDTA1/ 1mol[tex]Ca^{2+}[/tex]
[tex]Ca^{2+}[/tex]=0.01281M[tex]Ca^{2+}[/tex]
What is the concentration (mol/L) of the EDTA solution
[tex]n_E_{DTA }[/tex]= 3.203 \times.
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identify the copolymer. group of answer choices polystyrene polypropylene polyethylene nylon 6,6 polyvinyl chloride
Polystyrene is the copolymer. A copolymer is a polymer that results from the linking of two (or more) different types of monomers along a single polymer chain.
What is the purpose of a copolymer?Copolymerization is a process used to alter the qualities of manufactured plastics to satisfy specific requirements, such as lowering the glass transition temperature, modifying the glass transition temperature, regulating the wetting properties, or raising solubility. The process is known as rubber toughening, and it involves enhancing mechanical qualities.
A polymer composed of two or more monomer species is called a copolymer. Copolymers are numerous, widely used polymers in commerce. Nettle rubber, acrylonitrile butadiene styrene, and polyethylene-vinyl acetate (PEVA) are some examples (ABS).
A copolymer is a polymer that is created when two (or more) different types of monomers are bonded together in a single polymer chain, as opposed to a homopolymer, which uses only one monomer. Copolymers can be made in four different fundamental ways: randomly, alternately, blockly, and graftly.
Therefore the correct answer is polystyrene .
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Please anyone help!!
Answer:
Explanation: 2Mg+O2-----2MgO
2H2O2------2H2O+O2
Density is a physical property that relates the mass of a substance to its volume.
Calculate the density, in g/mL, of a liquid that has a mass of 0.125 g and a volume of 0.000225 L.
density:
Calculate the volume in milliliters of a 4.91-g sample of a solid with a density of 3.41 g/mL.
volume:
Calculate the mass of a 0.267-mL sample of a liquid with a density of 0.660 g/mL.
mass:
Answer:
0.177 g
Explanation:
To calculate the density of a liquid, the formula is: density = mass / volume
In this case, the mass is 0.125 g and the volume is 0.000225 L. So the density would be:
density = 0.125 g / 0.000225 L = 555.55 g/mL
To calculate the volume in milliliters of a solid with a known density, the formula is: volume = mass / density
In this case, the mass is 4.91 g and the density is 3.41 g/mL. To convert liters to milliliters, you must multiply by 1000.
volume = 4.91 g / 3.41 g/mL * 1000 mL/L = 1444.85 ml
To calculate the mass of a liquid with a known density, the formula is: mass = density x volume
In this case, the density is 0.660 g/mL and the volume is 0.267 mL.
mass = 0.660 g/mL x 0.267 mL = 0.177 g
Ni(OH)2 compound name
Nickel hydroxide is primarily employed in hybrid electric vehicles as the cathode active material for nickel hydride batteries. In the market for hybrid-type electric cars, the company's products hold a sizable market share.
What is the ni2+ ion?Niobium cation A nickel cation with a double positive charge is known as nickel(2+). It plays the part of a cofactor. It is a monoatomic dication, a nickel cation, a metal cation allergy, and a divalent metal cation.
Is precipitate Ni OH 2?The hexaminenickel (II) complex ion is created by dissolving the nickel (II) hydroxide precipitate. A precipitate of lavender is created. The precipitate turns from lavender to gray-blue in hue.
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Calculate the mass of a solid substance in grams, which occupies a volume of 2 and the density 4 gm * L ^ - 1
The mass of a solid substance which occupies a volume of 2L and has a density of 4g/L is 8 grams.
How to calculate mass?Density refers to the measurement of the amount of mass per unit of volume.
In order to calculate density, you need to know the mass and volume of the item. The formula for density is:
density = mass/volume
According to this question, a solid substance occupies a volume of 2 litres and a density of 4g/L. The mass can be calculated as follows:
4g/L = mass/2L
mass = 8 grams
Therefore, 8 grams is the mass of the solid substance.
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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.
Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).
The equation for the reaction is
2KClO3⟶2KCl+3O2
Calculate how many grams of O2(g) can be produced from heating 77.7 g KClO3(s).
Answer:
30.4 g of O2
Explanation:
To find the number of moles of KClO3, use the formula: moles = mass / molar mass.
Molar mass of KClO3 is = (39.1+35.5+3*16)=122.5g/mol
moles of KClO3 = 77.7g / 122.5g/mol = 0.634 mol
Therefore, the number of moles of O2 that can be produced is (3 moles O2/ 2 moles KClO3) x 0.634 moles KClO3 = 0.951 moles O2.
To find the mass of O2 produced, we use the formula: mass = moles x molar mass
molar mass of O2 = 2*16 =32 g/mol
mass of O2 = 0.951 moles * 32g/mol = 30.4 g of O2
So, from heating 77.7 g KClO3(s) 30.4 g of O2 can be produced.
What is the mass of 12 L of carbon monoxide (CO) gas at STP?
The mass of 12 L of carbon monoxide gas at STP is 32.16 g.
What is carbon monoxide?Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is highly toxic to humans and animals. It is a product of the incomplete combustion of carbon-based fuels, such as natural gas, coal, wood, and gasoline. Carbon monoxide poisoning occurs when the gas builds up in an enclosed space and is inhaled. Symptoms of carbon monoxide poisoning include headache, nausea, dizziness, and confusion.
The mass of 12 L of carbon monoxide gas at STP can be calculated using the ideal gas law. The ideal gas law states that the product of the
pressure (P),
volume (V),
and temperature (T) of a gas is equal to the mass (m) of the gas multiplied by the universal gas constant (R).
The equation for the ideal gas law is PV = nRT; where n is the number of moles of gas.
At STP, the pressure is 1 atm, the temperature is 273 K, and the universal gas constant is 8.314 J/mol·K. The molar mass of carbon monoxide (CO) is 28.01 g/mol.
Therefore, the mass of 12 L of carbon monoxide gas at STP can be calculated as follows:
m = (12 L)(1 atm)(273 K) / (8.314 J/mol·K)
m = 32.16 g
Therefore, the mass of 12 L of carbon monoxide gas at STP is 32.16 g.
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which of the following is a conclusion? which of the following is a conclusion? the candle needs oxygen to burn. the candle is 3.0 cm long. the mass of the candle is ten grams. the candle material melts when heated.
I've come to the conclusion that a candle needs oxygen to burn. The last paragraph of a research paper, essay, or article should have a conclusion that restates the thesis statement.
A conclusion consists of what?The last paragraph of a research paper, essay, or article should have a conclusion that restates the thesis statement. Your thesis should be restated in the conclusion paragraph, together with a summary of the major points you made in favor of it throughout the body of the essay and a statement of how you ultimately felt about it.The concluding paragraph or sentence of your thesis, as well as a summary of the main arguments you wanted to make in your thesis, make up the conclusion sample.The last paragraph of a research paper, essay, or article should have a conclusion that restates the thesis statement. Your thesis should be restated in the conclusion paragraph, which should also include a summary of the major supporting concepts you've covered in the paper.To learn more about conclusion refer to:
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(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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please determine what the appropriate ketone or aldehyde would be to produce the following alcohol when using nabh4 followed by mild acid.
Aldehydes and ketones can be converted to their corresponding alcohols using NaBH 4. This method reduces NaBH4 in some way.
The process for a NaBH4 reduction is the same, with the exception that the second step's proton source is methanol. Secondary alcohols are produced when sodium borohydride (NaBH 4) is added to ketones (after addition of acid). Ketone reduction [NaBH 4] Explained: In organic chemistry, reduction refers to the addition of hydrogen to a molecule or the removal of electronegative atoms from the molecule, such as oxygen or halogen. Alcohols cannot be produced from carboxylic acids or esters using NaBH 4. Since it is more reactive than the starting carboxylic acid, the intermediate formed during this reaction—an aldehyde—cannot be separated.
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which of the folooiwng best accounts for the pressure in the vessel remaining constant as the volume decreasese below .21l
The volume of gas increases by 25% when the volume falls below 21 with the constant temperature.
PV=nRT is the ideal gas equation.
PV is constant and equals k because the temperature is also constant.
Because there is 20% less pressure, P 2 = 0.8P and PV = V 2 V 2 = 0.8P PV, where PV = 0.8 V and V = 1.25V
Gas volume consequently increases by 25%.
The temperature of a system is constant during an isothermal process, which is a thermodynamic process. Thermal equilibrium is preserved because heat is transferred into or out of the system so slowly.
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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?
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
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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if you use compressed air to dispense a keg on a system where the gas comes into contact with the beer, which of the following will happen?
If we use the compressed air to dispense keg on a system where gas comes in contact with the beer, we get the ton of foam.
The keg is round metal or the wooden container that is used to store the beer. The compressed air is the form of the stored energy. This energy is used to function the machinery equipment or the process. The compressed air is used in the manufacture of some devices. The compressed air is a gas under the high pressure.
Thus, we get ton of foams if compressed air to dispense keg on a system where gas comes in contact with the beer.
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The following data were collected at the endpoint ofa titration performed to find the molarity of an HClsolution.Volume of acid (HCl) used = 14.4 mLVolume of base (NaOH) used = 22.4 mLMolarity of standard base (NaOH) = 0.20 MWhat is the molarity of the acid solution?(a) 1.6 M(b) 0.64 M(c) 0.31 M(d) 0.13 M
According to the problem, the molarity of the acid solution is 0.64 M.The following data were collected at the endpoint ofa titration performed to find the molarity of an HClsolution.
What is the molarity ?
Molarity is a measure of the concentration of a solution, expressed as the number of moles of a solute per liter of solution. It is commonly used to measure the concentration of a dissolved substance in a solution. For example, a solution containing one mole of a solute dissolved in one liter of solution would have a molarity of one. Molarity is often expressed using the symbol M.
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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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Which of the following would be expected to behave as a nucleophile? Which of the following would be expected to behave as a nucleophile?-OH +NH_4 Cl- H-A B D Ea). A, B, and D onlyb). B onlyc). A and D onlyd). A, D, and E only
c). A and D only, A and D solely anticipated nucleophile behaviour, because. A chemical species known as a nucleophile can contribute an electron pair to the formation of a bond.
We can observe a negative charge on -SH, which indicates that it possesses an electron pair. Due to the lone pair of electrons that may be supplied to form a covalent bond on the N atom of ammonia (NH3), it is also a nucleophile.
Therefore, the only options for a response would be A and B.
We can see that C and D have positive charges on them, indicating that they lack electrons themselves and are unable to give them to other species. They cannot be categorised as nucleophiles as a result. A nucleophile is a reactant that contributes two electrons to the formation of a new covalent bond (i.e. a Lewis base).
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assuming that the effects of the relative strengths of different types of electron repultsions given in the background information are considerably more important for bond angles of
An AB3N2 molecule has trigonal bipyramidal electron domain geometry (electron pair geometry).
This means the 2 of the electron pairs are axial (up and down).
The other 3 pairs point towards equitorial positions.
Since there are 2 non-bonding pairs of electrons, to minimize repulsion, these non-bonding pairs assume an equatorial position, and form a T-shaped molecular geometry
What is geometry?
Originally developed to model the physical world, geometry has applications in almost all sciences, as well as in art, architecture, and other activities related to graphics.Geometry also has applications in apparently unrelated areas of mathematics. For example, the methods of algebraic geometry are central to Wiles' proof of Fermat's Last Theorem, a problem that was stated in terms of elementary arithmetic and remained unsolved for several centuries.To know more about elements, click the link given below:
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an ancient human skull was found in the foothills of rexburg. in an attempt to determine when the person had lived, the skull was carbon dated. it was determined that the skull contained 80% of the 14c that is normally found in living tissue. approximately how old is the skull. the t1/2 for 14c is 5730 years.
Given that the skull contained 80% of the 14C that is normally found in living tissue, we can use the half-life of 14C to determine that the skull is about 11,460 years old.
The method of carbon dating is based on the fact that the radioactive isotope carbon-14 (14C) is present in all living organisms. When an organism dies, the amount of 14C in its tissue begins to decrease as it decays into nitrogen-14 (14N). By measuring the amount of 14C in a sample, scientists can determine how long ago the organism died. The half-life of 14C is 5730 years, which means that after 5730 years, half of the 14C in a sample will have decayed into 14N. After another 5730 years, half of the remaining 14C will have decayed, and so on. This is because it has taken 5730 years for the 14C to decay to half of the normal levels found in living tissue, and another 5730 years for it to decay to 80% of the normal levels. It's important to note that the carbon dating process is not always accurate and the age could be affected by different factors such as contamination, preservation of the sample, and the error of the measurement.
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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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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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which of the following are compounds? select all that apply.? a) FeCl3
b) Mg
c) P8
d) Fe
e) N2O5
f) CH4
g) F2
h) CuO
FeCl3, CH4, [tex]F_2[/tex], and CuO are compounds. Thus option A, F, G, H are the answers.
A compound is a substance made up of two or more different elements that are chemically bonded together. The chemical formula for a compound represents the ratio of the elements present in the compound.
a) FeCl3 is a compound, which is made up of Iron and Chlorine elements chemically bonded together. The chemical formula for FeCl3 is FeCl3, representing the ratio of Iron and Chlorine in the compound.
f) CH4 is a compound, which is made up of Carbon and Hydrogen elements chemically bonded together. The chemical formula for CH4 is CH4, representing the ratio of Carbon and Hydrogen in the compound.
g) F2 is a compound, which is made up of Fluorine element chemically bonded together. The chemical formula for F2 is F2, representing the ratio of Fluorine in the compound.
h) CuO is a compound, which is made up of Copper and Oxygen elements chemically bonded together. The chemical formula for CuO is CuO, representing the ratio of Copper and Oxygen in the compound.
On the other hand, b) Mg is an element, not a compound. It represents Magnesium, which is a single element and not made up of two or more different elements. Similarly, c) P8 is not a chemical formula, so it is not a compound. It represents an unknown compound. d) Fe is an element, not a compound. It represents Iron, which is a single element. e) N2O5 is a molecule, not a compound. It represents Dinitrogen pentoxide, which is made up of Nitrogen and Oxygen elements but not chemically bonded together.
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