Calcium oxide has different physical and chemical properties as compared to calcium carbonate. Option 1.
Differences between calcium oxide and calcium carbonateCalcium carbonate and calcium oxide are unique from one another in terms of their physical and chemical properties, even though calcium oxide can be produced by the decomposition of calcium carbonate.
Both calcium carbonate and calcium oxide are only similar in terms of their color. They both appear white in color. Their differences include:
The chemical formula of calcium oxide is CaO while that of calcium carbonate is [tex]CaCO_3[/tex].Calcium oxide is able to react with water to form lime water, [tex]Ca(OH)_2[/tex]. Calcium carbonate, on the other hand, is insoluble in water.Both have different melting points.Calcium oxide cannot undergo a decomposition reaction, whereas, calcium carbonate can be decomposed further.Thus, both calcium carbonate and calcium oxide exhibit different chemical and physical properties.
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The complete question is as below:
Calcium carbonate is heated and decomposes to form calcium oxide (CaO) and carbon dioxide (CO2). Which statement is true about the difference between calcium carbonate and calcium oxide?
Calcium oxide has different physical properties and different chemical properties.Calcium oxide has the same physical properties and different chemical properties.Calcium oxide has the same physical properties and the same chemical properties.Calcium oxide has different physical properties and the same chemical properties.The molar heat of the vaporization of ammonia is 23.3 kJ/mol. What is the molar heat of condensation of ammonia?
The molar heat of the vaporization of the ammonia is 23.3 kJ / mol. the molar heat of condensation of the ammonia is - 23.3 kJ / mol.
The molar heat of condensation is just opposite to the molar heat of vaporization. the molar heat of vaporization of ammonia is given ad :
ΔH vaporization = - ΔH condensation
so, the heat of condensation for the ammonia i given as:
ΔH condensation = - 23.3 kJ / mol.
Thus. The molar heat of the vaporization of the ammonia is 23.3 kJ / mol. the molar heat of condensation of the ammonia is - 23.3 kJ / mol.
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Write a thermochemical equation for the combution of ethanol (C 2 H 5 OH).
∆Hcomb = -1367 kJ/mol
Thermochemical C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l) ΔHcomb = -1367 kJ/mol
What is Thermochemistry?
The study of thermochemistry examines the heat energy involved in chemical reactions and/or phase transitions like melting and boiling. Energy can be released or absorbed during a reaction or phase change. Thermochemistry focuses on the heat-based energy transfer between a system and its surroundings. In order to forecast the quantities of reactants and products throughout a specific reaction, thermochemistry is helpful. It is also used to foretell whether a reaction will be spontaneous or non-spontaneous, favourable or unfavourable, in conjunction with entropy determinations. While exothermic reactions discharge heat, endothermic reactions absorb heat. The concepts of thermodynamics and the idea of energy in form of chemical bonds are combined in the field of thermochemistry.
Thermochemical is the relation between heat ,work, temperature and energy.
We can only use the energy quality when it's high,
It means that heat easily cover when the gallon is burn.
The energy of the fuel has ready converted into heat .
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✓ Details
1. 2HCl(aq) + Zn(s)→ H₂(g) + ZnCl₂(aq)
You have 100. mL of a .300 M solution of HCI. As the reaction occurs, the volume of solution is unchanged.
1. How many grams of Zn were used up?
2. How many liters of hydrogen gas at STP were formed?
3. What is the molar concentration of the zinc chloride formed?
k
The number of grams of Zinc used is 1962g, the volume of hydrogen gas formed at STP is 672.071L and the molar concentration of Zinc Chloride is 300M.
1. The number of moles of Zn used up is given by the equation:
n = CV
Since the volume is given in mL, we must convert it to L before plugging it into the equation.
n = (300 mol/L)(100 mL)(1 L/1000 mL)
n = 30 mol
The molar mass of Zn is 65.39 g/mol, so the number of grams of Zn used up is given by:
m = nM
m = (30 mol)(65.39 g/mol)
m = 1962 g
2. The number of moles of H₂ formed is also 30 mol. One mole of any gas occupies 22.4 L at STP, so the number of liters of H₂ formed is given by:
V = nRT/P
V = (30mol)(0.08206 L•atm/mol•K)(273 K)/(1 atm)
V = 672.071 L
The volume of liters of H2 formed is 0.6L
3. The molar concentration of ZnCl₂ is given by the equation:
C = n/V
Here, number of moles is n and the volume is V The number of moles of ZnCl₂ is 30 mol, and the volume is 100 mL, so the molar concentration is:
C = (30 mol)/(0.1L)
C = 300 M
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suppose you need to prepare 120.4 ml of a 0.183 m aqueous solution of nacl. what mass, in grams, of nacl do you need to use to make the solution?
The mass of NaCl required ( in grams) to make the aqueous solution is 1.287 g.
What is molecular mass? How do you calculate molecular mass?
A molecule's mass is the sum of the masses of all the atoms it contains. As it is the total mass of all the atoms in a molecule, it is calculated below
The molecular mass of NaCl = Atomic mass of Na + Atomic mass of Cl
= 23 + 35.5
= 58.5g/mol
Given the volume of aqueous solution = 120.4 ml or 0.1204 L
Molarity of solution = 0.183M
We know that,
Molarity = No. of moles/Volume
No. of moles = 0.183 × 0.1204
= 0.022 moThe molar.
Molar mass of NaCl = Mass of Na + Mass of Cl
= 23 + 35.5
= 58.5g/mol
Mass of NaCl = 0.022 × 58.5
= 1.287 g
So, the mass of NaCl required ( in grams) to make the aqueous solution is 1.287 g.
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if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml iwth pure water, what isthe molarity of copper ii sulfate in the diluted soltuion
The molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.
What is Molarity?Molarity is defined as the ratio of moles of solute to the volume of solution.
Mathematically,
Molarity = moles of solute / volume of solution
Step 1 : Calculation of molesGiven,
Initial volume of CuSO4 = 4 ml = 4/1000 = 0.004 l
Molarity of CuSO4 = 0.0250 m
By substituting all the values, we get
0.025 = moles/ 0.004
moles = 0.025 × 0.004 = 0.000100 mol
Moles = 0.0001 mol.
Step 2 : Calculation of molarity of final volumeTotal volume = 0.004 l + 10 ml
= 0.004 + 0.001 = 0.005 l
Moles of CuSO4 = 0.0001 mol
Molarity = 0.0001 / 0.005 = 0.02 M
Thus, we concluded that the molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.
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draw all of the stereoisomers of 2-chloro-5-methylheptane. use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable.
The stereoisomers of 2-chloro-5-methyl heptane Iis in the 2 chloro 5 methyl hectare.
In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism wherein molecules have an equal molecular method and series of bonded atoms, however, fluctuate inside the 3-dimensional orientations in their atoms in area.
Stereoisomers are isomers that fluctuate inside the spatial arrangement of atoms, in preference to the order of atomic connectivity. one in every of their most exciting sort of isomers is the replicate-image stereoisomer, a non-superimposable set of molecules that are a replicate image of one another. Stereoisomers are isomeric molecules with identical chemical formulas but exceptional atomic arrangements. for this reason, they own similar chemical and physical homes.
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Which of these substances contains a compound made up of exactly 2 different types of atom?
The compound that is made up of exactly two atoms is option B.
What is a compound?The term compound has to do with something that is formed by the combination of two or more atoms. We know that these atoms are components of elements. We have to say here that there is almost no limit to the number of atoms that could be combined in a compound.
Let us look at the images that we have in the options. The compound that would be made up of two a toms would have only two colors of balls in its depiction and that is what we must look out for.
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compare the elements na, b, al, and c with regard to the following property: which has the largest (most positive) ionization energy?
The increasing ionization energy order is Na< Al < B < C.
The ionization energy decreases in groups from top to bottom and increases over time from left to right. Therefore, helium has the highest initial ionization energy and francium has the lowest one. The ionization energy increases because the ratio of protons to electrons increases.
The higher the ionization energy the more difficult it is to remove an electron. Therefore, ionization energy is a measure of reactivity. Ionization energy is important because it can be used to predict the strength of chemical bonds. The process by which electrically neutral atoms or molecules are transformed into charged atoms or molecules by gaining or losing electrons.
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for the following reaction, 6.47 grams of chlorine gas are mixed with excess sodium iodide. the reaction yields 7.11 grams of sodium chloride. chlorine (g) sodium iodide (s) sodium chloride (s) iodine (s) what is the theoretical yield of sodium chloride ? grams what is the percent yield of sodium chloride ?
5.323 gm is the theoretical yield and 133.5 is the percentage yield .
What is chemical reaction ?
Chemical reaction is a process in which one or more substances are transformed into one or more other substances (products). Substances are either chemical elements or compounds. Chemical reactions rearrange the constituent atoms of reactants to produce different substances as products.
Chemical reactions are an integral part of technology, culture, and even life itself. Fuel combustion, iron smelting, glass and pottery making, beer brewing, and wine and cheese making are just a few examples. Activities involving chemical reactions that have been around for thousands of years. Chemical reactions are more in a variety of processes occurring in the Earth's geology, atmosphere and oceans, and in all biological systems.
Cl2 is limiting reagent , moles of cl2 = 0.091
moles of NaCl = 0.121
Theoretical yield of NaCl will be 0.091 moles = 0.091 moles X 58.5 g/mole = 5.3235 g
percentage yield = (7.11/5.3235) X 100 = 133 %
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In naming a binary molecular compound,the number of atoms of each element present in the molecular is indicated by?
Using prefixes before the name of each element, the number of atoms of each element present in the molecular is indicated.
A prefix is placed before the name of the element when naming a binary compound to indicate how many atoms are present.For example:In carbon dioxide which is CO2 (prefix di- meaning 2)In carbon tetrachloride which is CCl4 (prefix tetra- meaning 4) In N2O5, the name is dinitrogen pentoxide (prefix di- and pent- meaning 2 and 5)It depends on the number of atoms present in a compound.A binary compound is a compound composed of two elements.To learn more about binary compounds visit:
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Give the structure of the product formed when 2−methyl−1−butene reacts with bromine in water.
The product formed in the reaction of 2−methyl−1−butene with bromine in water will be 1-bromo-2-methylbutan-2-ol (Structure attached)
A reaction mechanism is a representation of step by step transfer of electrons and molecules from one compound to another compound. In reaction mechanisms, the curved arrows show the moment of electrons.
In the reaction mechanism of 2-methylbut-1-ene the double bond of 2-methylbut-1-ene act as an attacking group and attacks Br₂. As a result, one Br atom gets attached to 2-methylbut-1-ene. This results in a cyclic brominium ion generation, which makes the neighboring carbon more substituted. Water molecule then attacks on the more substituted carbon and 1-bromo-2-methylbutan-2-ol will generate as the major product.
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which of the following are best described as short chains of amino acids that are very stable and can have a variety of different antimicrobial activities, such as forming pores in bacterial plasma membranes and inhibiting cell wall synthesis? view available hint(s)
The forming pores in bacterial plasma membranes and inhibiting cell wall synthesis is antimicrobial peptides.
Lysosomes are membrane-bound cellular organelles that contain digestive enzymes. Lysosomes are involved in various cellular processes. Breaks down excess or worn-out cell parts. They can be used to destroy invading viruses and bacteria. Opsonization is an immune process that uses opsonization to mark foreign pathogens for elimination by phagocytic cells.
Without an opsonin such as an antibody, the negatively charged cell wall of the pathogen and the scavenger cells repel each other. Examples of opsonins are antibody molecules such as IgM, which can activate the complement system to sensitize antigens to phagocytosis. In addition to phagocytosis opsonization also promotes antibody-dependent cell-mediated cytotoxicity.
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Complete the mechanism for the acid‑catalyzed alcoholysis of the epoxide by adding any missing atoms, bonds, charges, nonbonding electrons, and curved arrows.
The lone pair electron in alcohol undergoes protonation and stabilizes the cation that is present in the oxygen atom. The final product contains both the ether and alcohol functional groups.
The chemical element with the letters O and the atomic number 8 is called oxygen atoms. It belongs to the chalcogen group of the periodic table and is a highly reactive nonmetal that readily forms oxides with most elements as well as with other compounds. Chemical elements, or substances with only one sort of atom, include molecular oxygen. An oxygen atom has eight protons in its nucleus, as indicated by its atomic number of 8 and the official chemical symbol O. The manufacture of steel, plastics, and textiles, brazing, welding, and cutting of steel and other metals, rocket propellant, oxygen therapy, and life support systems in aircraft, submarines, spaceflight, and diving are just a few common uses for oxygen. Since many organisms use molecular oxygen for respiration, molecular oxygen is necessary for life.
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For the following balanced equation, which has the highest coefficient?
4 H2 + 2 C → 2 CH4
H2 has the highest coefficient.
Considering a balanced equation,
4 H2+2 C
————>2 CH4
=> The hydrogen molecule's (H2) coefficient is 4.
=> The carbon (C) coefficient is 2.
=> Methane CH4 has a coefficient of 2.
As a result, H2 has the greatest coefficient of 4, which is.
H2 has the highest coefficient, hence.
Gases made of hydrogen have no color or smell. It is quickly set ablaze. It burns with a light blue, nearly undetectable flame once lit. They are lighter than air, the vapors. It ignites easily at a variety of vapor/air concentrations. While asphyxiating easily due to the displacement of oxygen in the air, hydrogen is not poisonous.
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b. The third energy level in an atom contains a d sublevel. Why then does the "d-block" start in
the fourth row of the periodic table?
Answer:
There is a d sublevel in the third energy level, but it requires the electrons to have energy similar to electrons in the fourth energy level. The 3ds orbitals are not filled until after the 4s is filled.
Explanation:
if 45.3 ml of a 0.108 m hcl solution is needed to neutralize a solution of koh, how many grams of koh must be present in the solution?
If 45.3 ml of a 0.108 M HCL solution is needed to neutralize a solution of KOH, then grams of KOH that must be present in the solution is 0.274gm.
What is molarity?The amount of a substance present in a certain volume of solution is termed as molarity . It can also be defined as the moles of a solute per liter of solution.
HCL +KOH ---> KCL+ H2O
Molarity= mol solute / L solution
Given volume of HCL= 45.3ml= 0.0453L
concentration = 0.108M
As we know that, No. of moles = concentration * Volume
=0.0453* 0.108
Number of moles=0.0048
Mass = no. of moles*molar mass
Molar mass of KOH = 56.1 g/mol
= 0.00489* 56.1
Grams of KOH= 0.274 gm.
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the gas in a 250.0 ml piston experiences a change in pressure from 1.00 atm to 2.80 atm. what is the new volume (in ml) assuming the moles of gas and temperature are held constant?
The new volume will be "56.2 mL" assuming the moles of gas and temperature are held constant .
What is Ideal gas law ?
The ideal gas law (also called the perfect gas law), the relationship between the pressure P, volume V, and temperature T of a gas in the boundary region between low pressure and high temperature. Gas molecules move almost independently. each other.
PV = nRT, where n is the number of moles of gas and R is the universal (or perfect) gas constant, 8.31446261815324 joules/kelvin/mol (the universal gas constant is defined as Avogadro's number NA multiplied by Boltzmann's constant k) . ) In the International System of Units, energy is measured in joules, volume in cubic meters (m3), force in newtons (N), and pressure in pascals (Pa). where 1 Pa = 1 N/m2. A force of 1 Newton moving a distance of 1 meter does 1 Joule of work. Therefore, the product of both PV and nRT has the dimension of work (energy).
By using the Boyle's Law, we get
P1V1 = P2V2 ; we can find
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Why are the products of an exothermic reaction likely to be warmer than the reactants?.
If the energy produced in an exothermic reaction is released as heat, it results in a rise in temperature.
In exothermic reactions, more energy is launched while the bonds are shaped in the goods that are used to interrupt the bonds inside the reactants. Exothermic reactions are observed with the aid of a boom in the temperature of the reaction combination. If materials react and the temperature of the aggregate will increase, the reaction is exothermic.
A chemical response includes the breaking of bonds within the reactants and the forming of bonds in the goods. It takes power to break bonds. when strength is launched in an exothermic response, the temperature of the response mixture will increase. when electricity is absorbed in an endothermic reaction, the temperature decreases. you could monitor modifications in temperature by placing a thermometer inside the response aggregate.
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how many single covalent bonds must a chlorine atom form to have a complete octet in its valence shell?
Answer:
Chlorine only needs to make one covalent bond. It has seven e- so it needs one more to make a full octet.
Explanation:
Give a structural formula for the carbocation intermediate that leads to the major product in the reaction of hydrogen chloride with cis−2−butene.
The major product formed when hydrogen chloride reacts with 2−methyl−2−butene proceeds through a tertiary carbo cation intermediate.
An addition reaction occurs when 2 methyl 2 butene and hydrogen chloride are combined. The Markovnickov rule states that the carbon atom with the fewest hydrogen atoms receives the negative part of the addition. As a result, carbon 2 will be increased by the addendum's negative portion.
The carbocation will be carbon-2 as indicated in the figure that is linked to this answer since this reaction proceeds through an ionic mechanism. This carbon atom is the one to which chlorine will finally bond.
A chemical compound known as hydrogen chloride (HCl) contains a polar covalent bond between chlorine and hydrogen atoms.
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write the equations for the following reactions. make sure to balance the equation and include the states. zinc metal and hydrochloric acid
Balanced equations for the following reactions along with the states are:
Zn (s) + 2 HCl (aq) ZnCl₂ (aq) + H₂ ( g)
Sn (s) + PbSO₄ (s) → Pb (s) + SnSO₄ (s)
a. Chemical equation
Zn (s) + HCl (aq) → ZnCl₂ (aq) + H₂ ( g)
Balanced chemical equation
Zn (s) + 2 HCl (aq) ZnCl₂ (aq) + H₂ ( g)
b. Chemical equation
Sn (s) + PbSO₄ (s) → Pb (s) + SnSO₄ (s)
Balanced chemical equation
Sn (s) + PbSO₄ (s) → Pb (s) + SnSO₄ (s)
c. Chemical equation
Mg (s) + Cu(NO₃)₂ (aq) → Mg(NO₃)₂ (aq) + Cu (s)
Balanced chemical equation
Mg (s) + Cu(NO₃)₂ (aq) → Mg(NO₃)₂ (aq) + Cu (s)
d. Chemical equation
Ag (s) + H₂SO₄ (aq) → Ag₂SO₄ (aq) + H₂ ( g)
Balanced chemical equation
2 Ag (s) + H₂SO₄ (aq) → Ag₂SO₄ (aq) + H₂ ( g)
e. Chemical equation
Fe (s) + H₃PO₄ (aq) → Fe₃(PO₄)₂ (aq) + H₂ ( g)
Balanced chemical equation
3 Fe (s) + 2 H₃PO₄ (aq) → Fe₃(PO₄)₂ (aq) + 3 H₂ ( g)
f. Chemical equation
Pb (s) + CH₃COOH (aq) → Pb(CH₃COO)₂ (s) + H₂ ( g)
Balanced chemical equation
Pb (s) + 2 CH₃COOH (aq) → Pb(CH₃COO)₂ (s) + H₂ ( g)
(Complete question)
write the equations for the following reactions. Make sure to balance the equation and include the states. a.) zinc metal and hydrochloric acid b) tin metal and lead sulfate c) magnesium metal and copper nitrate d)silver metal and sulfuric acid e) iron metal and phosphoric acid f) lead metal and acetic acid.
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if you run the acetylation reaction (part 1) using the exact amounts described in the procedure, what is the limiting reagent?
A limiting reagent is one that is completely consumed during a reaction, hence restricting the product's yield. Compared to the limiting reagent, the other reactant(s) are present in excess.
The amount of product that could be produced based on the molar ratios is known as the theoretical yield. The amount that was actually retrieved is divided by the theoretical yield to determine the percent yield. For this amount to be expressed as a percentage, multiply it by 100.
What is Acetylation Reaction ?Acetylation is an organic esterification reaction using acetic acid in organic chemistry. It gives a chemical molecule an acetyl group. These substances are known as acetate esters or just acetates. The opposing reaction, deacetylation, involves removing an acetyl group from a chemical molecule.
Deacetylation is the removal of an acetyl group from an organic chemical molecule, whereas acetylation is the introduction of an acetyl functional group (acetoxy group, CH3CO) into an organic chemical compound, specifically the substitution of the acetyl group for a hydrogen atom.
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11. Reactions of Ni(CO)4 in which phosphines or phosphites replace CO to give Ni(CO)3L occur at effectively the same rate for different phosphines or phosphites. Classify the substitution process and provide an explanation for your answer.
It is a dissociative substitution process.
Write the reaction mechanism
Step 1:
Ni(CO)₄ → Ni(CO)₃ + CO
Step 2:
Ni(CO)₃ + CO + L → [Ni(CO)₃L
In the first step of the reaction or in the rate-determining step nickel tetracarbonyl dissociates into nickel tricarbonyl and carbon mono oxide. As the first step is the rate-determining step in which dissociation occurs so it is a dissociative mechanism. In the second step phosphines and phosphites replace carbon monoxide at the same rate, in simple words this step is the same for different phosphines and phosphites. This is because it is an SN1 reaction so the second step does not affect the rate of reaction.
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what is the relationship between the kinetic energy of particles and the forces of attraction between particles
The relationship between the kinetic energy of particles and the forces of attraction between particles is that if average kinetic energy increases than the force of attraction then particles will not condensed to form liquid or solid.
If the kinetic energy less than force of attraction between the particle then the particles will tends to form solid or liquid. the kinetic energy is directly proportional to distance between the particles. The distance between the particles is inversely proportional to the intermolecular forces.
Thus, The relationship between the kinetic energy of particles and the forces of attraction between particles is that if average kinetic energy increases than the force of attraction then particles will not condensed to form liquid or solid.
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Diamond has a similar structure to silicon dioxide. How many covalent bonds does each carbon
atom have with other carbon atoms?
Answer:
Four covalent bonds.
Explanation:
In a diamond, each carbon atom forms four covalent bonds with four other carbon atoms. In a diamond, each carbon shares electrons with four other carbon atoms.
Carbon can form single, double, or even triple bonds with other carbon atoms. In a single bond, two carbon atoms share one pair of electrons. In a double bond, they share two pairs of electrons, and in a triple bond, they share three pairs of electrons.
The particle model represents particles as small solid spheres.
Give TWO limitations of this simple model. [2 marks]
The particle model represents particles as small solid spheres. The limitations of this simple model are we don’t know the size of the particles, and we don’t know how much space is between particles.
What is the particle model ?The term particle model is define as a model that describes the arrangement and movement of particles in a substance. This mode is used to explain the physical properties of solid, liquid and gases.
All matter is made up of very small indivisible particles. They are too small to see. These particles do not share the characteristics of the material they make up. There is nothing in the space between the particles that make up matter.
Thus, The limitations of this simple model are we don’t know the size of the particles, and we don’t know how much space is between particles.
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molecules with a plane of symmetry between the chiral centers are achiral and meso. identify which of the following molecules are meso.
Molecules with a plane of symmetry between the chiral centers are achiral and meso. From the given molecules (Picture attached) only (A) compound 1 is meso.
When compounds possess a plane of symmetry between the chiral centers they are called achiral or meso compounds. Among the given compounds (A) compound 1 have a plane of symmetry. So we can say compound one is a meso or achiral compound. Compounds two, three, and four have no plane of symmetry, as you can see in the structures attached. So all other compounds (compound 2, compound 3, and compound 4) except compound one are not meso or achiral.
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predict the charge that an aluminum ion would have. question 10 options: a) 1 b) 5- c) 2 d) 3 e) 1-
An aluminum ion will have +3 charge.
The electronic configuration of Aluminum(Al) is 1s2 2s2 2p6 3s2 3p6. This shows that an aluminum has 3 shells from which the outermost shell contains 3 valence electrons. So, the Aluminum has the tendency to loose maximum 3 electrons which gives Al + charge called cation. The atomic number of Al is 13.
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Write the reaction showing the decay of Mn-56
WILL MARK BRAINLIEST! 50 points! Can someone pls explain fully balancing chemical equations and how to do it. I’m so confused and I have a test on Friday.
Answer:
When you balance a chemical equation, you change (!!YOU MUST CHANGE IT DO NOT FORGET!!) coefficients. You never change subscripts. A coefficient is a whole number multiplier. To balance a chemical equation, you add these whole number multipliers (otherwise known as coefficients) to make sure that there are the same number of atoms on each side of the arrow.
For those of you who may not have a clear understand of what a coefficient is, here's a simple definition that you can look at. A coefficient can be simply explained a number or symbol by which another number or symbol (as a mathematical variable) is multiplied.
Also, here's a simple definition of a subscript! A subscript is a distinguishing symbol (such as a LETTER OR NUMERAL) written immediately above or below and to the right or left of another character.
Here's an example.
The equation that were trying to solve is:
Zn + 2HCl ---> ZnCl^2 + H^2
Answer:
There are two chlorines on the right but only one on the left, and the chlorine is in a single chemical species on each side. Put a 2 in front of the HCl on the left hand side.
Zn + 2HCl ---> ZnCl^2 + H^2
And if you look carefully, you will see that the equation is now balanced, with one Zn on each side, two hydrogens on each side and two chlorines on each side. Some examples can be rather easy!
Explanation:
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