According to VSEPR theory,
11. tetrahedral, trigonal pyramidal, <109.5°
12. octahedral, square pyramidal, 90°
13. 104.5
The valence shell electron pair repulsion (VSEPR) theory is a model used to predict 3-D molecular geometry based on the number of valence shell electron bond pairs among the atoms in a molecule or ion. This model assumes that electron pairs will arrange themselves to minimize repulsion effects from one another. In other words, the electron pairs are as far apart as possible. The VSEPR model is useful for predicting and visualizing molecular structures. The structures are: linear, trigonal planar, angled, tetrahedral, trigonal pyramidal, trigonal bipyramidal, disphenoidal (seesaw), t-shaped, octahedral, square pyramidal, square planar, and pentagonal bipyramidal. 104.5° is the bond angle of water.
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Which of the following compounds will exhibits dipole-dipole attraction between molecules? {Hint: look for polar molecules.} a. SiO2 b. CBr4 c. Cl4 d. BH3 e. AsH3
Dipoles in [tex]AsH_{3}[/tex] are attracted to other dipoles. The other chemicals all exhibit dispersion forces and are non-polar. [tex]AsH_{3}[/tex]'s tetrahedral molecular structure with a persistent dipole.
What is dipole-dipole attraction?
Dipole-dipole forces draw together the positive ends of two polar molecules that have opposite charges on their ends. Strengths of dipole-dipole forces per mole range from 5 kJ to 20 kJ.
Examples of polar compounds that interact dipole-dipole include hydrogen chloride (HCl), carboxylic acids (such as acetic acid), and amino acids. A polar molecule's positive end will pull another molecule's negative end and change the other molecule's location.
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balance the equation
Answer: the balanced equation is
6KOH + Cl₂ ⇒ 5KCl + KClO₃ + 3H₂O
Explanation:
Given equation
KOH + Cl₂ ⇒ KCl + KClO₃ + H₂O
let us first balance Cl on the right-hand side
KOH + Cl₂ ⇒ 2KCl + KClO₃ + H₂O
next, lets balance K on the left-hand side
3KOH + Cl₂ ⇒ 2KCl + KClO₃ + H₂O
since we have H₂ on the right-hand side to equate H₂ we need to make the H coefficient even on the right-hand side so we multiply it by 2 so we get
6KOH + Cl₂ ⇒ 2KCl + KClO₃ + 3H₂O
now we balance K on the right-hand side
6KOH + Cl₂ ⇒ 5KCl + KClO₃ + 3H₂O
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The primary responsibility for investigating allegations of research misconduct belongs to:A. Office of Research Integrity (ORI)
B. Researcher(s)
C. Research institution(s)
D. B and C.
E. A, B and C.
The primary responsibility for investigating allegations of research misconduct belongs to Office of Research Integrity (ORI). Option A
What is research misconduct?We say that a researcher is guilty of research misconduct if the researcher has been found to be found to be engaged in an action that seems to have undermined the principles of ethics. This implies that the research have not been able to follow the standard operation protocol as he or she is carrying out the research.
For instance, in the area of the social sciences, it could be a research misconduct of the identity of the subjects that have taken part in the experiment is made public to the society and this is done without the consent of the subject. This is a violation of the privacy of the subject.
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the four nitrogens of caffeine are indicated below. which one of these nitrogens is the most basic? a. 2 b. 1 c. 3 d. 4
The nitrogen atom marked 2 is most basic among all 4 nitrogen; So, Option A is correct.
In the structure drawn of caffeine attached below, we can see that there are 4 nitrogen atoms marked 1 to 4.
-The nitrogen atom marked 1 has hybridization SP2 as its lone pair are involved in resonance with the ring by which doesn't act as a proton acceptor.
-The nitrogen atom marked 2 has hybridization SP2 as its lone pair are pointing outwards and away from the ring due to which its lone pair are not involve in conjugation which makes this nitrogen atom basic and it acts as a proton acceptor in a molecule.
-The nitrogen atom marked 3 and 4 in bigger ring has hybridization SP2 as their lone pairs are involved in conjugation with ring and in resonance stabilization of amide by which they doesn't act as a proton acceptor.
Caffeine is an psychoactive drug and one of the most widely consumed substance.It helps in decreasing drowsiness.It can have both good and bad effect on health.
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calculate the volume of 1.0 x 10-4 m cv solution that needs to be added to a 25.0 ml volumetric flask and diluted with deionized (di) water in order to prepare a calibration standard solution with a concentration of 1.0 x 10-5 m cv . as part of your preparation for performing this experiment, repeat this calculation for each of the calibration standards you would need to prepare in part i a of the experiment and record the information in your notes so that you have it ready during the lab session. also calculate the volume of 1.0 x 10-4 m cv solution required to prepare 10 ml of 3.0 x 10-5 m cv solution to be used in part ii b of the experiment and record the information in your notes. group of answer choices 2.5 milliliters 250 microliters 25 microliters 2.5 microliters none of the above
The volume of solution required to make final concentration of is 2.5 ml and for is 3 ml.
What are calibaration of a solution?
Standard addition, internal standard, and external standard techniques to quantitation all employ calibration solutions. Calibrants can be made gravimetrically using reference standards or pure reference materials, but they can also be made on a volumetric or other fraction basis.
For preparing the solution of known concentration and volume, the equation can be related as:
M1v1=M2V2
M1 and V1 are molarity of known solution
M2 AND V2 molarity of solution to be prepared
Here,M1=1 x 10^-4M
M2= 1 X 10^-5 M
V2= 25ml
1 x 10^-4 x V1=1 X 10^-5 x 25
Volume of required solution=2.5ml
To make the volume 10ml of 3 x 10^-5 x 10
Volume of required solution=3ml
Therefore the volume of solution required to make final concentration of is 2.5 ml and for is 3 ml.
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the polarizability of an atom increases as the increases.
the polarizability of an atom increases as the increases.
first ionization energy
principal quantum number of the valence electron shell
all of the above answers would correctly complete the sentence.
effective nuclear charge
The polarizability of an atom increases as the increases :
principal quantum number of the valence electron shell
Polarizability can be defined as the ease to with which the electron cloud of the atom is distorted. id the principle quantum number of the valence shell electron increase that means when we move down the group in a periodic table than the valence electrons are loosely bonded to the nucleus and the ionization energy decreases and the polarizability will be increases.
Thus the principal quantum number of the valence electron shell increase will lead to the increase in the polarizability of an atom.
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a polymerization reaction involves removing oh from one monomer and h from another monomer to join the two molecules and make water (h2o). this type of reaction, where a small molecule is removed to join monomers, is known as a(n): addition polymerization condensation polymerization redox combustion
This type of reaction, where a small molecule is removed to join monomers, is known as condensation polymerization .
A polymerization is the process of the making of the polymer. the addition polymer is form by the linking of the monomers. the condensation is the process where the smaller molecules or the monomers join with each other and form the larger units. a polymerization reaction involves removing oh from one monomer and H from another monomer to join the two molecules and make water , H₂O.
Thus, this type of reaction, where a small molecule is removed to join monomers, is known as condensation polymer.
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your task is to measure the amount of energy evolved during the combustion of some hydrocarbon. which of the following would be the ideal technique for this experiment?
Your task is to measure the amount of energy evolved during the combustion of some hydrocarbon, then the ideal technique for this experiment would be : Bomb calorimetry
What is bomb calorimetry?Hydrocarbons are combustibles means that they can react in a combustion reaction to produce energy. To measure this energy, it's a necessary equipment so that the reaction can be placed in a controlled way.
The bomb calorimeter is the equipment, which is an adiabatic vessel, with water and heat is calculated based on the increase in the temperature of the water.
Coffee-cup calorimetry is used to measure the heat of a dissolution reaction and bomb manometry is used to measure the pressure.
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calculate ecell for 1.0 m cu2 / 0.001 m zn2 : [ select ] tip: room temperature of 298 k can be assumed and use the e0cell for the cu/zn cell calculated from standard reduction potentials in q2.
In q2, the Cu/Zn cell was 1.041V by using standard reduction potentials.
As we have the formula
ZnZn 2+ (0.001M) Cu 2+ (0.1M) Cu
Overall cell reaction: ZnZn² +2e
Cu²+ +2e ⟶Cu
Zn+Cu 2+ Zn+Cu²+ Zn²+Cu
E cell o = cathode standard reduction potential + anode standard oxidation potential
E cell o = 0.34 to 0.76 V
E cell o =1.1 V
Kc = [Zn 2+ ] / [Cu 2+ ]= 10²
E cell o =1.1 V
K C = [Cu 2+ ] [Zn 2+ ] = 10 1
The cell's EMF at any electrode concentration is:
E=E o n 0.059 log(K C )=1.1 -0.059/2 X log(10² )=1.1 2 0.059 (2)
=1.10-059=1.041V
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How many grams are there in 3.4 mols of NH3?
Answer: 57.8g
Explanation:
We can find molar mass by adding up the masses of each component, nitrogen is 14 and hydrogen is 1, this gives us 17g/mol.
Multiplying molar mass by number of moles will give us the grams in that many moles, 3.4x17=57.8g.
which of the following occurs naturally as nonpolar diatomic molecules?
A. Hydrogen
B. Nitrogen
C. Oxygen
D. All of the above
E. None of the above
Hydrogen, Nitrogen, and Oxygen are nonpolar diatomic molecules that are found in nature. Answer is right ( D).
Which chemicals fall within the nonpolar category?Nitrogen, carbon dioxide, methane, oxygen, ozone, and nitrogen are a few examples of non-polar compounds. Examples for homonuclear nonpolar compounds include ozone, oxygen, and nitrogen (O 3 ). Other nonpolar compounds include alkynes, which are water insoluble.
Diatomics are they non-polar?Any diatomic molecule with the same element represented by both atoms must be a molecular compound. A polar molecule is a diatomic compound, such as HF, that contains a polar covalent link.
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Which of the following insoluble salts would you expect to dissolve upon the addition of nitric acid?(a) CaF2(b) NiS(c) Ag3PO4(d) AgCl(e) BaSO4(e) All would dissolve with the addition of acid.(f) None of these would dissolve upon the addition of acid.
Highly potent acid HNO₃ is. The oxidizing agent also uses it. CaF₂, NiS, Ag₃PO₄, AgCl, and BaSO₄ are the insoluble salts in this example.CaF₂, NiS, Ag₃PO₄ are dissolved, and AgCl and BaSO₄ not dissolved in HNO₃.
An oxidizing agent is a material in a redox chemical process that obtains or "accepts"/"receives" an electron from a reducing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) (called the reductant, reducer, or electron donor). Or to put it another way, an oxidizer is anything that oxidizes something else. This is described by saying that oxidizers "undergo reduction" and "are reduced" whereas reducers "undergo oxidation" and "are oxidized." The oxidation state, which characterizes the degree of electron loss, of the oxidizer falls while that of the reductant increases. The three most common oxidizing substances are oxygen, hydrogen peroxide, and halogens.
An oxidizing agent is a chemical species that goes through a chemical reaction in which it obtains one or more electrons, to put it simply.
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Predict the products when cyclohexanol is heated in the presence of H^+. Show both the organic product and the inorganic product formed in this reaction.
Draw cyclohexanol with a double bond and without the OH- group. next draw water
How are double bonds created?Two atoms sharing two sets or electrons result in a double bond. Always shared in pairs, electrons. Covalent bonds are referred to as each shared electron pair. A double bond between two atoms requires more energy to break than a single bond because four electrons are divided between the two atoms in a dual bond.
What makes a single bond different from a double bond?When two atoms join one couple of electrons, they form a single bond; when they share two pairs, they form a double bond (four electrons). To form triple bonds, three pairs free electrons (six atoms) share space.
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in scrum a____is defined as a piece of a product that delivers some useful functionality to a customer.
According to scrum, a feature is a component of a product that offers or provides a customer some practical functionality.
The features in Agile approaches stand for a section of functionality that provides significant business value and meets a stakeholder requirement. User stories are the building blocks of features. "A feature is a service that meets the needs of a stakeholder. A benefit hypothesis and acceptability criteria are included for each feature. The Product Manager is in charge of the Features in the Scaled Agile Framework.
Although she doesn't necessarily compose them, she has the last say about the feature's priorities and content. Some businesses describe the person who is in charge of defining and ensuring that the feature is executed as intended using the role of feature owner rather than that of product manager.
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If 52.7g of MgO is obtained, then what is the percent yeild of the reaction? 2Mg(s)+O2(g)—>2MgO(s)
Then 74.8 % is the percentage yield of the reaction.
What is percentage yield?The percentage yield indicates the amount of product received in relation to the maximum feasible mass. The percentage of atoms in reactants that create the intended product is given by the atom economy of a reaction.
In industrial chemistry, the percentage yield of a chemical process is an essential factor. It is possible to compute the yield (amount) of product obtained vs what might have been achieved in theory if all of the reactants were converted without loss or waste.
Given reaction:
2Mg(s)+O₂(g) → 2MgO(s)
42.5 gm of Mg = 42.5 / (24 g/mol)
= 1.77 mol
33.8 gm of O₂ = 33.8 gm / (32 g/mol)
= 1.06 mol
1.06 moles of O₂ will require (2 × 1.06) = 2.12 moles of Mg
But we have 1.77 moles of Mg, so here Mg is limiting reagent.
1.77 moles of Mg reacts with (1.77/2) = 0.89 moles of O₂ and forms 1.77 moles of MgO
Thus, theoretical yield of mass = 1.77 moles × (40 gm/mol)
= 70.8 gm
Actual yield = 52.7 gm of MgO.
So, Percentage yield = (Actual yield / theoretical yield) × 100
= (52.7 gm /70.8 gm) × 100
= 74.8 %
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The complete question is as follows:
Consider the reaction 2Mg(s) + O2(g) → 2MgO(s). 42.5 g of Mg reacts with 33.8 g of O₂. If 52.7 g of MgO is obtained, then what is the percent yield of the reaction? 54,0% 62.3% 0 67.1% 74.8%
clastic sedimentary rocks are defined and named based mainly on their while chemical sedimentary rocks are defined mainly on their
Chemical sedimentary rocks are named mostly based on chemistry, whereas clastic sedimentary rocks are named primarily based on particle size.
By sorting, grain size, and shape, clastic rocks are categorised. Chemical sedimentary rocks form when dissolved minerals are dissolved in water. Chemical rocks are categorised mostly based on the minerals that make up the rock.Clastic sedimentary rocks are composed of rock fragments (clasts) from earlier strata. Rock fragments that have become loose due to weathering are then transferred to a basin or depression where silt is confined. When sediment is deeply buried, becomes crushed, and becomes cemented, sedimentary rock is produced. Clastic sedimentary rocks are classified into various groups based on the size of the sedimentary grains and the sorts of rock pieces that make up the sediment.
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What are pigments such as chlorophyll and carotene used for?; What are pigments used for in plants?; Why do plants need pigments like chlorophyll?; What is the function of carotene pigment in photosynthesis?
In regions of the electromagnetic spectrum where chlorophylls a and b are unable to absorb light, the plant can absorb light thanks to carotenoids and other auxiliary pigments.
What are pigments such as chlorophyll and carotene used for?Carotenoids absorb energy from sunlight similarly to chlorophylls. To increase photosynthesis, they then transfer the energy to chlorophyll molecules. Carotenoids function as antioxidants in all living organisms. The oxidation reactions that can harm cells can be slowed down by chemicals known as antioxidants.Insects, birds, and other animals are drawn to pigments as visible cues for pollination and seed dissemination. Plants are also shielded by pigments from UV and visible light harm (Tanaka et al., 2008). The human diet includes many fruits that are high in pigment.Chlorophyll and other pigments, which absorb the sun's rays to produce food for the organisms, are necessary for photosynthesis.To Learn more About chlorophylls refer To:
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Which of the following is an example of a chemical reaction?A.water evaporating from a pot on a hot stove B.sand being removed from sea water by filtration C.A spoonful of sugar dissolving in a glass of water D.A water solid forming when two clear liquids are poured together
Chemists refer to the process of boiling water as endothermic.It follows that since certain processes need heat, others must also produce heat as they operate.They are referred to as exothermic.
When water is cooked on a stove, would a chemical reaction take place?The water is not performing any chemical reactions when it boils.Even while it boils, the water is still.Simply put, the temperature has altered. Water molecules may undergo phase shifts as it continues to boil, gaining enough energy to vaporize as it does so.
Is a boiling pot of water undergoing a chemical reaction?Boiling water causes a physical, not a chemical, alteration in the substance.Hydrogen and oxygen do not separate from water molecules.Instead, the links between molecules in water break, enabling them to transition physically from the a liquid to a gas.
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if 4.6 g of cu3(po4)2(s) was recovered from step 1, what was the approximate [cu2 ] in the original solution? (the molar mass of cu3(po4)2 is 381 g/mol.)
The molar mass of cu3(po4)2 is 381 g/mol .The approximate [cu2 ] in the original solution is 0.30 M.
What is Molar Mass?One sample mole's weight is the molar mass. To determine the molar mass, connect the atomic masses (atomic weights) of each atom in the molecule. The mass of 1 mole of a compound is determined by its molar mass, which is measured in grammes per mole. The mass of a mole of a specific substance, expressed in grammes, is referred to as its molar mass. A mole is any material or compound that includes the Na number of constituents, such as atoms, molecules, or ions; Na is the Avogadros number, and Na = 6.023 1023. The total mass of the atoms that make up a molecule per mole, expressed in grammes, is known as the molar mass. In addition,To learn more about Molar Mass refer to:
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Draw the major organic product for each of the two situations.
(a) Phenylacetic acid is treated first with Br2 and one equivalent of PBr3, then with a large excess of ethanol.
(b) Propionic acid is treated first with Br2 and one equivalent of PBr3, then with a large excess of ammonia.
a) Phenylacetic acid is treated first with Br2 and one equivalent of PBr3, then with a large excess of ethanol is 2-bromo-2-phenyacetic acid.
b) Propionic acid is treated first with Br2 and one equivalent of PBr3, then with a large excess of ammonia is Alanine.
The are the examples of the Hell-Volhard-Zelinsky reaction .
a) when phenylacetic acid react with the PBr₃ it will convert to the major product as 2-bromo-2-phenyacetic acid.
b) Propionic acid is treated first with Br2 and one equivalent of PBr3, produces the 2-bromo propanoic acid and then it treated with a large excess of ammonia and produces the major product as is Alanine.
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thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. select the best lewis structure for socl2.
A Lewis Structure is defined as a very simplified representation of the valence shell electrons in a molecule by use of dots.
A Lewis Structure is defined as a very simplified representation of the valence shell electrons in a molecule. Lewis Structure is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are represented as "dots" or for bonding electrons as a line between the two atoms.
Thionyl Chloride is a colorless to pale yellow or red liquid with a pungent smell. Thionyl Chloride is used as a chlorinating agent in the manufacture of organic compounds, it is also used as a solvent in Lithium batteries, and in making pesticides.
The Lewis structure of Thionyl Chloride is given in the image attached below.
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What are Chemical Properties? Meaning & Examples
A chemical property is a characteristic of a specific substance that can be seen in a chemical reaction.
What is a chemical property?Chemical properties are traits of a specific substance that can be seen in a chemical reaction. Flammability, toxicity, heat of combustion, pH level, radioactive decay rate, and chemical stability are a few important chemical qualities.The process by which one material transforms into another is known as a chemical transformation or reaction. Chemical attributes can then be seen because the substances' features are changing during this process.A physical property, which encompasses qualities like shape (volume and size), color, texture, flexibility, density, and mass, is to be distinguished from a chemical property.To Learn more About chemical property refer To:
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the lattice energy of nacl is 769 kj/mole. which of the following is a correct statement about nacl?
The lattice energy of nacl is 769 kj/mole and the following is a correct statement about nacl that It requires 769 kJ to separate one mole of solid NaCl into one mole of each gaseous Na+ and Cl- ions.
What is lattice energy?
Electropositive metals interact with electronegative nonmetals to create solid ionic compounds. The concept of lattice energy, a type of potential energy given in units of kJ/mol, is involved in both the formation and dissolution of such compounds.
It is possible to think of the generation of aqueous ions from a solid as the breakage of its crystal lattice followed by hydration. If the Born-Haber cycle is used to determine the other two processes, the enthalpy of any one of the three processes can be determined.
Hence that It requires 769 kJ to separate one mole of solid NaCl into one mole of each gaseous Na+ and Cl- ions.
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How does multiplying a wave's wavelength by its frequency give the wave's speed?
PLEASE HELP!!!
Multiplying a wave's wavelength by its frequency gives the wave's speed because the speed of a wave is equal to its frequency multiplied by its wavelength. The equation for this is speed = frequency x wavelength.
What is wavelength?
Wavelength is the distance between two successive peaks or troughs in a wave. It is the measure of the cycle of a wave, or the length of one full cycle of a waveform. Wavelength is also often used as a measure of the frequency of a wave, with the two being inversely proportional. In other words, the higher the frequency of a wave, the shorter its wavelength. Wavelengths are commonly measured in meters, but can also be expressed in any unit of distance. Wavelengths of visible light range from about 400 nanometers (violet) to 700 nanometers (red). Wavelength is an important property of waves, as it is used to identify and classify different types of waves. It can also be used to measure the speed of a wave, as the speed of a wave is determined by its wavelength and frequency.
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how many electrons are involved in the oxidation-reduction reaction of zinc metal with hydrochloric acid. show the number of electrons lost or gained by each element.
The electrons are involved in the oxidation-reduction reaction of zinc metal with hydrochloric acidThere are two electron Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g).
Calculation:
The net reaction is
Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g).
The Cl⁻ ions are spectators - they do not change.
This experiment includes the reaction of zinc with hydrochloric acid. The test compares the reactivity of 3 metals magnesium zinc and copper. The video consists of a dialogue of writing balanced equations for all of the discovered reactions.
Hydrochloric acid, also known as hydrochloric acid, is an aqueous solution of hydrogen chloride. it's far a drab solution with a function smelly odor. it's miles categorised as a sturdy acid. It is a component of gastric acid inside the digestive gadget of maximum animal species, which includes human beings. when hydrochloric acid comes into contact with pores and skin and other tissues it is able to reason excessive burns.
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What describes a property of a proton?; What are 3 characteristics of a proton?
A positive charge is a property that best describes a proton. A proton is made up of three smaller particles called quarks.
Characteristics of a proton :
1. A proton is located inside the nucleus sometimes bounded together by nuclear forces along with neutrons.
2. A proton carries a charge of 1.6 x 10^-19 Coulomb. One Coulomb constitutes approximately 6.241 x 10^18 protons.
3. A proton has a mass of 1.67262 x 10^-27 kg or approximately 1 a.m.u It is almost equal to that of a hydrogen atom as its nucleus only consists of one proton and the rest of the atom constitutes one electron whose mass is nearly negligible.
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2,4-dinitrophenol uncouples oxidative phosphorylation by decreasing the membrane potential. The process involves inhibiting electron flow from complex to ubiquinone shuttling the protons across the mitochondrial membrane preventing the electron transfer from Fe-S center to ubiquinone inhibiting cytochrome oxidase
DNP is integrated into mitochondrial membranes, electron transport is gradually inhibited. Dinitrophenol (DNP) is an uncoupler, which means it may separate the pumping of H+ ions for ATP production from the flow of electrons.
Without affecting the respiratory chain or ATP synthase (H(+)-ATPase), uncoupler of oxidative phosphorylation in mitochondria prevent the coupling between the electron transport and phosphorylation reactions. This inhibits ATP synthesis.
DNP is known to have mixed activities, which means that in addition to uncoupling, it also has other effects. This implies that ATP production is not possible using the energy from electron transport.
It is a precursor to other chemicals and is biochemically active, allowing protons to go from the intermembrane space into the mitochondrial matrix to decouple oxidative phosphorylation from the electron transport chain in cells with mitochondria.
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which of the following branched chain amino acids form succinyl coa when catabolized? (more than one aswer)valine, leucine, and isoleucine
Option A and C: Valine and Isoleucine are the branched chain Amino acids that form succinyl CoA.
Isoleucine and valine breakdown produces energy and precursors to replenish TCA cycle intermediates (anaplerosis). Both amino acids break down to produce succinyl CoA, an intermediate in the TCA cycle; the breakdown of isoleucine also results in acetyl CoA. Thus, option A and C are the right choice.
Because extra-hepatic tissues have higher activities of the transaminases for the branched-chain amino acids, they are more likely to degrade isoleucine, leucine, and valine than most other amino acids, which are primarily degraded in the liver. These tissues include muscle. Although the liver is where the majority of individual amino acids are fully oxidized, skeletal muscle is where BCAA catabolism begins.
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FILL IN THE BLANK. a___is an experimental set-up that can be used to measure the heat of a chemical reaction or a physical change and determine the specific heat capacity of a substance.
Calorimeter is an experimental set-up that is used to measure the heat of a chemical reaction or physical change and determine the specific heat capacity of a substance.
What is calorimeter?Calorimeters are used to measure volume and heat produced during a certain time interval. The flow is passed through a tank partly filled with water whose thermal capacity and weight are known before the experiment.
A calorimeter is an object used for calorimetry and is the process of measuring heat of chemical reactions and heat capacity. Some common types of calorimeter are: differential scanning calorimeters, isothermal micro calorimeters and titration calorimeters.
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Why does this equation show that matter is neither created nor destroyed (law of
conservation) in a chemical reaction?
Mg(OH), + 2HN03 - Mg(NO3), + 2H,O
There are the same number of atoms for each element on the reactant and product
side of the equation.
There are the same number of molecules on the reactant and product side of the
equation.
There are the same number of reactants as products in the equation.
® This equation does not show that matter is neither created nor destroyed.
The two main postulates that was given by Antoine Lavoisier are, oxygen play an important role in combustion and the other is mass of the reactant and product is conserved. Therefore, the correct option is option A.
What is law of conservation of mass?According to Law of conservation of mass, mass can neither be created nor be destroyed. Mass can only be transformed from one form to another. The law of conservation of mass was given by Antoine Lavoisier. Every reaction in nature follow the law given by Antoine Lavoisier that is mass is always conserved.
The statement that is representing matter is neither created nor destroyed in a chemical reaction is 'there are the same number of atoms for each element on the reactant and product.'
Therefore, the correct option is option A.
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