Entropy, from lowest to highest entropy will be CuO (s) < H₂O (l) < H₂O₂ (l) < H₂O (g) The highest entropy is in gases. This is due to the wide variety of microstates in which gases can reside.
Do more moles result in more entropy?Higher entropy is a result of more moles on the product side. When a reaction contains numerous phases, the generation of a gas often leads to a far greater increase in entropy than any increase in the number of moles of a liquid or solid.
How low is the entropy?The physical state with the lowest entropy is the solid state. Because entropy is a measure of unpredictability, this is the case. Molecules cannot move as easily in the solid state as they can in the liquid and gaseous phases.
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question:
Arrange the following from lowest to highest entropy: H,0(), H,O2(0 H20(g), CuO(s). Assume 1 mole of each at the same conditions. from lowest to highest entropy Drag and drop your selection from the following list to complete the answer: H20(e) H20(g) CuO(s) H202(e)
Silicon is used in computer why
Digital gold.
Explanation:Silicon is the material of choice in the chip industry. Unlike the metals normally used to conduct electrical currents, silicon is a 'semiconductor', meaning that its conductive properties can be increased by mixing it with other materials such as phosphorus or boron.
Answer:Unlike the metals normally used to conduct electrical currents, silicon is a 'semiconductor', meaning that its conductive properties can be increased by mixing it with other materials such as phosphorus or boron. This makes it possible to turn an electrical current on or off.
Explanation:
what is wrong with the notation 1s22s22p63s23p63d104s24p2 for germanium (atomic number 32)? why should the 4s subshell be filled before the 3d ?
The 4s orbital in the electronic configuration of a germanium should be filled first before 3d orbital because 4s orbital has a less energy than 3d orbital.
The electronic configuration of element is written in the order which is given in the attached image. The order of filling electron is given by Madelung rule in which electrons tries to achieve the order which fills the energy sublevels of atoms. According to the Aufbau principle, electrons occupy the lowest energy sublevel.
In other words, the orbital with a smaller value of n+l will be filled first. The n and l value for 4s orbital is 4 and 0 respectively. The n and l value for 3d orbital is 3 and 2. Hence, their n+l value will be
4s=(4+0)=4
3d=(3+2)=5
Hence, the electronic configuration of germanium should be written as 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰.
Therefore, 4s orbital in the electronic configuration of a germanium should be filled first before 3d orbital because 4s orbital has a less energy than 3d orbital.
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Write the balanced neutralization reaction that occurs between h2so4 and koh in aqueous solution.
The balanced neutralization reaction that occurs between H2SO4 and KOH in aqueous solution is;
H2SO4 (aq) + 2KOH (aq) --> 2H2O (l) + K2SO4 (aq)
Neutralization reaction
We refer to this kind of reaction, in which an acid and a base combine to produce water and salt, as a neutralization reaction. In this instance, our base is potassium hydroxide (KOH), and our acid is sulfuric acid (H2SO4) (KOH).
Acid and base leads to water and salt.
Double-replacement reaction
The H+ from the H2SO4 will attach to the OH- from the KOH in this double replacement reaction, resulting in the formation of H2O. (water). Similar to this, K+ will bind to SO42- to form K2SO4 salt.
For example, sodium hydroxide (NaOH) and hydrochloric acid (HCl) can be combined to create a salt, sodium chloride (NaCl), and water (H2O). NaOH + HCl → NaCl + H2O is the chemical formula for the neutralization reaction.
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a gas mixture contains 84 % nitrogen and 16 % oxygen. if the total pressure is 1.19 atm , what are the partial pressures of each component?
If the total pressure is 1.19 atm than partial pressure of N2 is 0.99 atm and O2 is 0.19 atm.
Define partial pressure.An idea is the partial pressure of a gas (rather than something we can measure). We consider the pressure of each gas in a mixture to be a component of the combination's overall pressure. Each gas has a certain pressure when contained by itself.
Given,
A gaseous mixture which contains 84% of N₂ and
16% of O₂
The total partial pressure Ptotal = 1.19atm
Ptotal = P N₂ + P O₂
% of various component of the mixture, we know the fractional composition of each components:
Partial pressure of component = Fractional composition of component × Total pressure
Partial pressure of component = [tex]\frac{percentage composition}{100}[/tex] × Total pressure
Partial pressure of component of N2 = 84/100 × 1.19 = 0.99 atm
Partial pressure of component of O2 = 16/100 × 1.19 = 0.19 atm
Thus,
partial pressure of N2 is 0.99 atm and O2 is 0.19 atm.
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What is the name symbol and charge of an ion that contains 15 protons and 18 electrons.
P3 is the symbol for the ion, which consists of 15 protons and 18 electrons.
To start, let's define what an ion is.An atom or a collection of atoms with a charge is an ion. Depending on the process through which the ion is created, the charge might be either positive (+) or negative (-).
1. If the element loses an electron, the ion will be positive (s)
2. If the element involved gained an electron, the ion will be negative (s).
We'll start by locating the element's symbol in order to answer the above-mentioned question. This is attainable as follows:
We learned that the ion had 15 protons from the question that was previously presented. The element's atomic number is this, or 15 protons.
Comparing the atomic sizes now The element whose ion we are searching for is phosphorus, which has the periodic table's corresponding number .
The ion's charge will then be determined. This is attainable as follows:
Electron = 18 Proton = 15
Price =?
Proton - electron equals charge.
Cost: 15 to 18
-3 charge
We will finally determine the ion's symbol. Below is an example to help:
Charge = -3 Proton = 15 Electron = 18
Phosphorus is an element.
P is the element's symbol.
Ion symbol is hence P3.
Consequently, the ion with 15 protons and 18 electrons has the symbol P3.
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What volume of water would you add to 15. 0 ml of 12 m hcl to make it to 6. 0 m solution?.
According to molar concentration, 30 ml of water should be added to 15 ml of 12 M HCl to make it to 6 M solution.
What is molar concentration?
Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
In the given example,volume required is calculated as, V₂=M₁V₁/M₂
V₂=12×15/6
V₂=30 ml.
Thus, 30 ml of water is added to 15 ml of 12 M HCl to make it to 6 M solution.
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Calcium carbonate can be broken down by heating. What is the scientific term for this?.
The term is called Thermal Decomposition. Calcium Carbonate is strongly heated until it undergoes thermal decomposition to form calcium oxide and carbon dioxide. The calcium oxide (unslaked lime) is dissolved in water to form calcium). Bubbling carbon dioxide through these forms a milky suspension of calcium carbonate.
Thermal decomposition is a chemical reaction where heat is a reactant. Since heat is a reactant, theses reactions are endothermic meaning that the reaction requires thermal energy to break the chemical bonds in the molecule.
A common example of thermal decomposition reaction is calcium carbonate decomposes into calcium oxide and carbon dioxide. This process is employed in the manufacturing of quick lime, which is an important substance in many industries.
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what should the charge of a sulfide ion (s2- )be in order for it to have the same electron configuration as that of neutral phosphorus in the ground state?
The +1 charged sulfide ion has the same electron configuration as neutral phosphorus in the ground state. In formula S, sulfur dioxide is the inorganic anion of sulfur.
Below is the electron configuration of ground-state neutral phosphorus with atomic number 15.
Phosphorus-15: 1s, 2s, 2p, 6, 3s, 2p
The electron configuration of sulfur at atomic number 16 follows again.
S-16: 1s, 2s, 2p, 6, 3s, 2p, 4.
A sulfide ion has a negative charge because it contains more electrons than normal. Due to more electrons than protons, an anion has a negative charge in it. Sulfate is an anion because its overall charge is negative. any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations negatively charged ions are anions.
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describe, without doing any calculations, how a graphical method can be used to obtain the activation energy for this reaction.
The slope of the graphical method can be used to obtain the activation energy.
As we know that rate constant (K) and the activation energy (Ea) relate to each other as;
lnK = ln A - Ea / RT
By using the values from the slope between 1/T and K, the activation energy of any reaction can be calculated
Hence
Slope = -Ea / R
Ea is the activation energy, the minus sign indicates that energy will b absorbed by the system
R is the rate constant, and the value of R is 8.314 J/mol.K
So it is clear that we can get the activation energy by using the slope of the graphical data.
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What would happen to the energy of the σ1s mo if the h atoms in h2 were pulled apart to a distance twice as long as its normal bond length?.
Energy of the σ1s MO if the h atoms in H₂ were pulled apart to a distance twice as long as its normal bond length then the energy would increase and radius would decreases
If coulomb force is positive and negative then in the hydrogen atom nucleus is positive charge and electron is localized in its 1st orbit and coulombs are said to f final = 2f and if the force increases the energy level increases and the electron and the positive charge are both in the opposite nature so the orbit would be shrinking toward the nucleus so that's why the radius would decreases
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if a sample of chloroform is initially 25 degrees celsius what is the final temperature if 150.0g of chloroform absorbs 1.0 kilojoules of heat, and the specific heat of chloroform is 0.96 J/g degrees celsius
Taking into account the definition of sensible heat, the final temperature if 150.0g of chloroform absorbs 1.0 kilojoules of heat is 31.94 C.
Definition of sensible heatWhen heat added or removed from a substance causes a temperature change in it without affecting its physical state (phase change), it is called sensible heat.
The expression that allows to calculate heat exchanges is:
Q = c× m× ΔT
where:
Q is the heat exchanged by a body of mass m.c is the specific heat substance.ΔT is the temperature variation.Specific heat of the substanceFinal temperatureIn this case, you know:
Q= 1 kJ= 1000 Jc= 0.96 J/gCm= 150 gΔT= Tfinal - Tinitial= Tfinal - 25 CReplacing in the definition of sensible heat:
1000 J = 0.96 J/gC× 150 g× (Tfinal - 25 C)
Solving:
1000 J = 144 J/C× (Tfinal - 25 C)
1000 J÷ 144 J/C= Tfinal - 25 C
6.94 C= Tfinal - 25 C
6.94 C + 25 C= Tfinal
31.94 C= Tfinal
Finally, the final temperature is 31.94 C.
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what will settle out if allowed to sit on a table
a suspension
a colloid
a solution
a compound
Suspension will settle out if allowed to sit on a table
In suspension the solute does not dissolve in liquid and when placed on table for sometime and it will settle down at the bottom of the beaker and we can separate particles of solute easily from solvent through filtration and the colloid particles of solute does not dissolve in liquid neither it is settle down and it float through the solvent and in solution the particles of solute dissolve in to the solvent and we cannot identify them as separate we cannot separate them by filtration and in compound the two element combine to form a new thing and resultant compound have two new or different properties other than its ingredients so the correct answer is suspension
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Besides nylon, what other product is formed from the reaction of adipoyl chloride and 1,6-diaminohexane?.
Besides nylon, HCl is formed from the reaction of adipoyl chloride and 1,6- diaminohexane , but HCl is the byproduct molecule.
What is formed when adipoyl chloride and 1,6-diaminohexane reacts with each other and what are the by products?Adipoyl chloride is the monomer and hexamethylinediamine is also the monomer which reacts together to form polymer.The polymer formed is named nylon6,6 which is a co polymer and nylon 6,6 find its use in various other activities of life.Nylon6,6 is a copolymer since the participation of two monomers , and not a single monomer undergoing decomposition.Nylon6,6 is formed with an elimination of small molecule of HCl which is considered to be a by product .It is formed by a condensation reaction and hence HCl is the product formed from the reaction of adipoyl chloride and 1,6- diaminohexane.To know more about nylon visit:
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how much heavier is a magnesium atom than helium atom
Answer:
6
Explanation:
Magnesium=24
helium= 4
24:4=6
what type of indicator would you use to determine the ph of an opaque (non-clear, cloudy) substance?
Specifically we can use red and blue litmus paper, phenolphthalein, and bromothymol blue , to determine the ph of an opaque (non-clear, cloudy) substance?
What is pH ?
pH, a quantitative measure of the acidity or basicity of aqueous or other liquid solutions. Widely used in chemistry, biology, and agriculture, this term translates the concentration value of hydrogen ions (usually in the range of about 1 to 10-14 gram-equivalents per liter) into a number between 0 and 14. increase. At neutral (neither acidic nor alkaline), the concentration of hydrogen ions is 10−7 gram equivalents per liter, which corresponds to a pH of 7. Solutions below pH 7 are considered acidic. Solutions with a pH greater than 7 are considered basic or alkaline.
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select true or false: beryllium, the first element in group 2a, is the most metallic element in the group.
The beryllium, the first element in group 2(a), is the most metallic element in the group. this is false . Beryllium is not the most metallic element in group 2(a)
The Beryllium is the element of group 2(a) and is metal but not the most metallic element. The element which is most metallic element is radium . The is when we move from top to bottom in a group the metallic character increases. the beryllium is on the top so, it is least metallic character.
Thus, The beryllium, the first element in group 2(a), is the most metallic element in the group. this is false . Beryllium is not the most metallic element in group 2(a)
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assuming all of these samples of gas are at the same temperature, which will escape through a hole in a balloon at the lowest rate?
Since carbon dioxide has the highest molecule mask, we will thus state that the rate of refuge in will be the slowest for this gas. So, based on the choices, we can conclude that option C is the right response.
According to Charles' law, when the pressure is held constant, the volume of a given amount of gas is precisely proportional to its kelvin-scale temperature. The balloon's volume grows as the temperature rises. In reality, assuming pressure is constant, they are proportionate to one another. However, there is a catch: you need to utilize what is known as absolute temperature in order to do computations. The balloon's volume grows as the temperature rises.
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if 4 ml of 0.0259 m cuso4 is diluted to 10,.0 ml with pure water, what is the molarity of copper ii sulfate in the diluted solution?
The molarity of copper II sulphate in the diluted solution would be 7.14 x 10^-3 M , if 4 ml of 0.0259 m cuso4 is diluted to 10 ml with pure water.
What is molarity and how the molarity of the diluted solution comes out to be 7.14x 10^-3 M?Molarity is the measure of number of moles dissolved in per liter of the solution of a given solution.The unit of molarity is g/L , but it depends on the units on mass and volume given in the question also.First we will calculate the number of moles : 4 ml x 1/1000x 0.0259 /1 = 1 x 10^-4 moles.The number of moles calculated out to be 1 x 10 ^-4 moles of copper sulphate , with which we will calculate the molarity.[CuSO4]= 1 x 10^-4 mol cuso4/ 0.014 = 7.14 x 10^-3 g/L of the molarity of copper II sulphate in the diluted solution.To know more about molarity visit:
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in a double replacement reaction, the anion of one reactant must be combined with the of the other reactant.
Opposing ions join in a double displacement reaction, also known as a double replacement reaction. This implies that the cation of one chemical will join with the anion of another molecule and form a bond, and vice versa.
What is a displacement reaction, exactly?A displacement reaction is a kind of reaction where a portion of one reactor is replaced by another. A displacement reaction is also sometimes called a substitution reaction or a metathesis reaction.
What causes a displacement response to happen?When one element replaces another in a compound, it causes a single displacement reaction. Neither metal nor a nonmetal may be used as a substitute for another metal. Only a more reactive component of the chemical it reacts with can take the place of the other component.
Give an example of double displacement.A precipitation reaction occurs between two aqueous ionic compounds to create a new, insoluble ionic compound. Here is an illustration of a reaction between lead (II) nitrate and potassium iodide that produces (soluble) potassium nitrate and (insoluble) lead iodide.
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what happens when the molecule-to-molecule attractions in the solute are comparable to those in the solvent?
The solute can have infinite solubility in the solvent when the molecule-to-molecule attractions in the solute are comparable to those in the solvent. The correct option to this question is B
On the basis of the concept, solute has a lower tendency to dissolve in water the stronger the interactions between the solute particles. Likewise, there is a greater chance that solubility will rise the stronger the interactions between the molecules of the solute and the solvent.
Water molecules cluster together as a result of stronger water hydrogen bonds, making them unavailable for biomolecular hydration. If the hydrogen bonds between the proteins significantly strengthen or weaken, the extended denatured forms of the proteins typically become more soluble in water.
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Complete question:
What happens when the molecule-to-molecule attractions in the solute are comparable to those in the solvent?
A) The solute does not dissolve in the solvent.
B) The solute can have infinite solubility in the solvent.
C) The material has only limited solubility in the solvent.
D) The solution will become saturated.
calculate the mass of gold that occupies the same volume as 62.9 g of cobalt. the density of cobalt is 8.90 g/ml and the density of gold is 19.3 g/ml
By using the formula of a density, the mass of a gold that occupies the same volume as 62.9 g of cobalt is
The density of a substance is calculated using the formula
density=mass/volume
By using density and mass, find out the volume in cobalt and use the same volume to find mass of gold. Rearrange the formula of density for volume
volume=mass/density
Plug values of cobalt in the formula
volume = (62.9 g×ml/8.90 g)
volume = 7.0674 ml
Now rearrange the formula of density for mass to calculate the mass of a gold
mass=density×volume
Plug values of gold in the formula
mass = 7.0674 ml×(19.3 g/ml)
mass = 136.40 g≈136 g
Therefore, the mass of gold occupies the same volume is 136 g.
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Greta passed a comb through her hair several times. She then placed the comb next to a stream of water flowing from a faucet. Greta observed the stream of water bend toward the comb. How did passing a comb through her hair allow the comb to bend the stream of water?.
Passing a comb through her hair allows the comb to bend the stream of water is option B. by giving the comb an electrical charge.
The comb draws the movement of water in an equal way. The price of the comb attracts the molecules of water within the flow. due to the fact the molecules inside the circulation may be moved without difficulty, the circulate bends toward the comb. because water molecules are polarized molecules, the effect is stronger than with dust.
While a comb is run thru your hair charges pass between your hair and the brush, so the comb turns into charged both definitely or negatively, and the hair is oppositely electrical charge.
The brush, blanketed in negatively charged electrons, becomes negatively charged as nicely, and your hair is left with a high-quality fee. This “separation of fee” is the purpose of the collection of effects we call static strength. If gadgets have specific prices, they appeal to (or pull towards) every other.
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Disclaimer:- your question is incomplete, please see below for the complete question.
Greta passed a comb through her hair several times. She then placed the comb next to a stream of water flowing from a faucet. Greta observed the stream of water bend toward the comb. How did passing a comb through her hair allow the comb to bend the stream of water?
A. by making the comb more absorbent.
B. by giving the comb an electrical charge.
C. by increasing the thermal energy of the comb.
D. by breaking some of the chemical bombs in the comb.
Perform the following mathematical operation, and report the answer to the correct number of significant figures. 0.97584 ÷ 5.68 = [?]
Answer: 0.172
Explanation:
which combination of ionic charge and ionic radius give the largest lattice enthalpy for an ionic compound?
Combination of ionic charge and ionic radius give the largest lattice enthalpy for an ionic compound are:
Ionic charge = high, Ionic Radius = small
Understanding Ionic bondsUnderstanding Ionic bonds Ionic bonds occur due to the handover of electrons to form positive ions and negative ions whose electron configuration is the same as that of the noble gases. Positive ions and negative ions are bound by an electrostatic force. The resulting compounds are called ionic compounds. One example that we often encounter everyday is table salt.
Well, the chemical formula for table salt is NaCl (Sodium chloride). In solid NaCl there is a bond between Na⁺ ions and Cl⁻ ions by electrostatic forces, so it is called an ionic bond. The crystal form of NaCl is a series of Na⁺ ions and Cl⁻ ions. One Na⁺ ion is surrounded by six Cl⁻ ions and one Cl⁻ ion is surrounded by six Na⁺ ions .
Formation of Ionic bondEach element must try to have an electron configuration like that of a noble gas, either by releasing electrons or accepting electrons, so that it is stable. This electron handover event occurs in the NaCl compound/ table salt.
Na belongs to group IA where IA has 1 valence electron, so that to be stable IA must release 1 electron. If you look at the electron configuration, 11Na: 2, 8, 1. So when removing 1 electron, the last electron becomes 8 (according to the octet rule). Due to removing 1 electron, the originally neutral Na becomes charged +1 (Na⁺).
The reaction:
Na → Na⁺ + e⁻ (meaning Na loses 1 electron, see the electron is to the left of the arrow)
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from what maximum height could a 62 kg person jump and land rigidly upright on both feet without breaking their legs? assume that all energy is absorbed by the leg bones in a rigid landing.
A person weighing around 62 kg can jump from a height of 0.329 metres without breaking their legs.
Potential energy present in a jumper from height h. = m g h
which, when the individual strikes the ground, entirely transforms into kinetic energy. Now, the human can only absorb a maximum of 200 J of energy.
m = 62 kg
g = 9.8 m/s²
⇒ m g h = 200 J
⇒ h = 200 J / (62 kg × 9.8 m/s²) = 0.329 m
Therefore, a person can only fall from a height of 0.30 m safely and without breaking both of their legs.
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What are the electron and molecular geometries, respectively, for hydrogen sulfide, h2s?.
Since there are four groups encircling the sulphur atom, the electron geometry is tetrahedral ( 2 lone pairs and 2 hydrogens). Due to the lone pair repulsion of the S-H bonds, the hydrogen sulfide's molecular geometry is bent, something I hadn't encountered in university. As a result, the angle will be much less than 109.5 degrees, or roughly 92 degrees.
The difference between molecular and electronic geometry is that the latter is the geometry of the localised electron densities, whilst the former simply considers the bound substituents around the sulphur, such as the hydrogens ( bonds and lone pairs).
Four of the five geometries linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral are referred to as electron group geometries. The form of the molecule is changed but the electron geometry remains the same if one or more of the bonding pairs of electrons are swapped out for a lone pair.
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A student is studying barium, a highly reactive element that is used in some paints. Which characteristic of barium is most closely related to its chemical reactivity?.
High ionization energy is the property of barium that is most directly connected to its chemical reactivity.
Has barium a high level of reactivity?Each of their atoms contains two valence (outermost) electrons. Barium has valence electrons in its fifth shell because it is in period 5, or row 5, however it can lose its valence electrons very quickly.
This explains why oxygen and other electronegative substances, like barium, make it so reactive. In a nutshell, when atom size increases, the ionization energy drops.
Barium is larger and has higher energy levels than strontium because it is in a different period—the sixth—than strontium, which is in a different period. As a result, barium will have a lower ionization energy.
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What is the estimated effective nuclear charge, zeff, experienced by an electron in a 3p orbital of a chlorine atom?.
The estimated effective nuclear charge, Zeff, experienced by an electron in a 3p orbital of a chlorine atom is 6.1.
The effective nuclear charge is the charge experienced by the outermost valence electrons of an atom. the effective nuclear charge is given as :
Zeff = Z - s
where,
Z is the actual nuclear charge
s is the screening costant
The electronic configuration for the chlorine atom is :
₁₇Cl = (1s²) (2s² 2p⁶) (3s² 3p⁵)
The formula for calculating screening constant of 3p electron is :
s = ( 0.35 ( number of electrons in n ) + 0.85 ( electron in (n-1 ) ) + 1 ( electrons in ( n-2 )
s = 0.35 (6) + 0.85 ( 8 ) + 1 ( 2 )
s = 10.9
Zeff = Z - s
Zeff = 17 - 10.9
Zeff = 6.1
Thus, The estimated effective nuclear charge, Zeff, experienced by an electron in a 3p orbital of a chlorine atom is 6.1.
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Predict the products of the double replacement reactions given. check to see that the equations are balanced. agno3 nacl → ? agna clno3 nano3 agcl (s) 2nano3 3agcl (s) ag nano3
After a double displacement reaction, the balanced equation and products are [tex]AgNO_{3}[/tex] (aq) + NaCl(aq) >>> AgCl(s)+ [tex]NaNO_{3}[/tex](aq).
In the equation of [tex]AgNO_{3}[/tex] with NaCl silver displaces the sodium from Nacl and forms AgCl while Na reacts with [tex]NO_{3}[/tex] and forms [tex]NaNO_{3}[/tex]. This is an example of double displacement and precipitation reaction.
In an aqueous solution, a double-displacement reaction takes place when the positive and negative ions of two ionic compounds exchange positions to create two completely different compounds. These substances may manifest as precipitates, gases, or molecular substances.
The following equation describes the general form of a double-displacement reaction: AD + BC = AB + CD
There are two types of double displacement reaction: precipitation and neutralization.
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if you have 172 grams of chromium (IIl) carbonate, how many moles do you have? About how many molecules do you have?
The moles in 172 grams of Chromium (IIl) carbonate is 0,6056 moles and there is 3.647x [tex]10^{23}[/tex] molecules.
The moles can be calculated as follows:
The first you should calculate the molar mass
Chromium (IIl) carbonate is Cr2(CO)3
Mass of Chromium = 51.9961 g/mol
Mass of Carbon = 12.0107 g/mol
Mass of Oxygen = 15.9994 g/mol
mass molar = (51.9961 g/mol x2)+(12.0107 g/mol x 3) +(15.9994 g/mol x9) = 284.0189 g/mol
The next step is calculate the moles
Divide the mass of chromium(III) carbonate by its molar mass to get moles
[tex]\frac{172 grams}{284.0189g/mol}[/tex] [tex]\\[/tex]
= 0.6056 moles
The next step is calculate the molecules
time the moles of chromium(III) carbonate by Avogadro's number
molecules= moles x Avogadro's number
molecules = 0.6056 moles x 6.02214076 × [tex]10^{23}[/tex][tex]mol^{-1}[/tex].
molecules= 3.6470 molecules
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