how many oxygen atoms are in 10.0g of 2Al2 CO3 3

The hydrate's chemical composition is MgCO39.85H2O.

The number of moles of water per mole of anhydrous solid (x), [Anhydrous SolidxH2O], will be computed by dividing the quantity of moles of water by the quantity of moles of the anhydrous solid (Equation 2.12. 6).

Solution: (a) The water of crystallization for MgSO 4 is 7H 2 O. Magnesium sulphate heptahydrate crystals lose seven water molecules when they are gently heated, turning them into anhydrous magnesium sulphate. <br> "magnesium sulphate heptahydrate" is underset (Mg SO 4.

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The original hydrate was MgCO3·2H2O, and it lost 10.332 g of water upon heating to give 9.668 g of anhydrous MgCO3.

What is Hydration?

Hydration is the process of adding water molecules to a substance or molecule. This process is necessary for many biochemical reactions to occur, as it can help to reduce the surface tension of a molecule to allow for the formation of hydrogen bonds, and to provide the environment necessary for molecules to interact with each other.

To determine the formula of the hydrate, we need to find the number of water molecules that were originally present in the hydrate. We can do this by comparing the mass of the original hydrate with the mass of the anhydrous (dry) compound left after heating.

The mass of the anhydrous compound is 9.668 g, which represents the mass of the magnesium carbonate (MgCO3) without the water. The mass of the water that was driven off can be calculated by subtracting the mass of the anhydrous compound from the mass of the original hydrate:

mass of water = mass of original hydrate - mass of anhydrous compound

mass of water = 20.00 g - 9.668 g

mass of water = 10.332 g

We can convert the mass of water to moles by dividing by the molar mass of water, which is 18.015 g/mol:

moles of water = mass of water / molar mass of water

moles of water = 10.332 g / 18.015 g/mol

moles of water = 0.573 mol

The formula of the hydrate can be written as MgCO3·nH2O, where n is the number of water molecules per formula unit of MgCO3. We can calculate n by dividing the moles of water by the moles of MgCO3 in the original hydrate:

moles of MgCO3 = mass of anhydrous compound / molar mass of MgCO3

moles of MgCO3 = 9.668 g / (24.305 g/mol + 12.011 g/mol + 3 x 15.999 g/mol)

moles of MgCO3 = 0.236 mol

n = moles of water / moles of MgCO3

n = 0.573 mol / 0.236 mol

n = 2.43

We can round the value of n to the nearest whole number, which gives us n = 2. Therefore, the formula of the hydrate is MgCO3·2H2O.

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Answer:

Au, C, K, O

Explanation:

Au = Gold

C = Carbon

K = Potassium

O = Oxegen

H20 = Not an element on the periodic table

CO2 = Not an element on the periodic table

NaCl = Not an element on the periodic table

Milk = Not an element on the periodic table

Mud = Not an element on the periodic table

Air = Not an element on the periodic table

Hope this helps! :)

The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.

When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.

A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.

They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.

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If MnO2 is added to something like a hydrogen peroxide solution, the rate of the reaction significantly accelerates. Titanium dioxide acts as a catalyst there in hydrogen peroxide's decomposition.

In the presence of manganese dioxide, hydrogen peroxide disintegrates into water and oxygen gas.

Hydrogen peroxide is broken down exothermically into water and oxygen with the help of a metal oxide catalyst (eq 1). (2) When a catalyst, like MnO2, is used, the activation energy is reduced to about 58 kJ/mol (1) and the breakdown is accelerated more than 1000 times compared to the uncatalyzed reaction.

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The \(p^{H}\) change is -0.092.

To measure the acidity or alkalinity of a sample, we use the \(p^{H}\) scale.

⇒                     \(H^{+} + NO_{2}\)     ⇄     \(HNO_{2}\)  

when we add \(Hcl_{4}\), then the following takes place

                   \(NO^{-} _{2}\)     +     \(H ^{+}\)  from  \(Hcl_{4}\)   →   \(HNO_{2}\)

⇒   Moles of  \(HNO_{2}\)    =    0.435 - 0.071

                                     =    0.364 mole

⇒   Moles of  \(NO^{-} _{2}\)      =    0.283 - 0.071                                      

                                    =    0.212 mole  

⇒         \(P^{ka}\)   +     \(HNO_{2}\)     =    3.15 ( from the table )

⇒  \(P^{H}\)  after addition

\(P^{H}\)    =    \(P^{ka}\)    +    log( salt / acid )

        =     \(P^{ka}\)   +    log(  \(NO^{-} _{2}\)  / \(HNO_{2}\) )

        =     3.15   +   log(  0.212 / 0.364 )

        =     3.15   +   log( 0.582 )

        =     3.15   +   ( -0.235 )

\(P^{H}\)    =     2.915    

⇒  \(P^{H}\) after deletion

\(P^{H}\)    =    \(P^{ka}\)    +    log( salt / acid )

        =     \(P^{ka}\)   +    log(  \(NO^{-} _{2}\)  / \(HNO_{2}\) )

        =     3.15   +   log(  0.283 / 0.435 )

        =     3.15   +   log( 0.718 )

        =     3.15   +   ( -0.143 )

\(P^{H}\)    =     3.007  

\(P^{H}\)  change    Δ \(P^{H}\)   =   \(P^{H}\)  after addition - \(P^{H}\) after deletion

                                   =   2.915 - 3.007

                     Δ \(P^{H}\)     =  -0.092

Therefore, Δ \(P^{H}\)  is  -0.092 when 0.071 mol hclo4 is added to 1.00 l of a buffer solution that is 0.435 m in hno2 and 0.283 m in no2-.

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Answer:

The formation of a precipitate

Explanation:

took thecquiz on edge. got it correct

The formation of a precipitate is a evidence that a chemical reaction has likely occurred.

A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.

Now lets check all option one by one

Option (A): a liquid slowly losing volume

Here change in volume occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (B): the formation of a precipitate

Here formation of precipitate is a evidence of a chemical reaction.

So it is correct option.

Option (C): boiling water releasing steam

Here formation of evaporation takes places which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (D): a change in the shape of solid.

Here change in shape occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Thus, from we can say that the formation of a precipitate is a evidence that a chemical reaction has likely occurred.

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Ethanol use was effect the shortage of corn available on those time because of corn is an ingredient to produce the ethanol. Hence, ethanol use was aligned with the rarity of corn availability on those time. the more ethanol was used, the more rare corn availability for consumer.  

The drought is a condition where the area cant provide enough water supply for a long. Agriculture sector is the most affected sector when the drought occur. The drought cause crop failure, and this condition create domino effect on another sector such as food price get more expensive, and because of food get more expensive, buying power getting low cause small business out of business.

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Answer:

carborane

Explanation:

Carborane acid is the strongest acid in the word. It is minimum 1 million times stronger or harder than 100% sulfuric acid with respect to Hammett acid feature

The pH value of the carborane is -18. Plus it is noncorrosive as it would be handled with bare skin

Therefore in the given case, the carborane is the strongest acid among all available ones

The addition of Cl to a saturated solution of calcium hydroxide will not have any effect on the position of equilibrium because it is a spectator ion and does not participate in the solubility of Ca(OH)2 is determined by the concentration of these ions in solution.

At equilibrium, the concentration of these ions determines the solubility of Ca(OH)2. The addition of Cl to the solution does not affect the concentration of Ca2+ or OH- ions because Cl is a spectator ion and does not participate in the reaction.the concentration of Cl-, which will shift the equilibrium the formation of Ca(OH)2 (s) nd decreasing the concentration of Ca2+ and OH- ions in solution.  in a saturated solution of Ca(OH)2, the concentration of Ca2+ and OH- ions is already at its maximum.

the following saturated solution of calcium hydroxide: Ca(OH)2 (s) + Ca(aq) + 2OH(aq) In the given reaction, Cl is not involved, so adding Cl will not directly affect the concentrations of the reactants or products. Since the position of the equilibrium depends on the concentrations of the involved species, the equilibrium will not shift in any direction or change the concentration of Ca(OH)2.

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The equilibrium is based solely on the solubility of Ca(OH)2 in water, and adding Cl will not change this. Therefore, the correct answer is D) None.

Adding Cl to the saturated solution of calcium hydroxide will have no effect on the position of equilibrium. This is because Cl is not a reactant or product in the equation and does not affect the concentration of either Ca or OH ions. The added Cl− ion (common-ion) interferes with the equilibrium by raising the concentration of the Cl− ion. According to Le Chatelier's principle the reverse reaction speeds up as it tries to reduce the effect of the added Cl−. As a result the equilibrium position shifts to the left.

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Answer:

2 moles

Explanation:

The equilibrium constant of the system is 11.3.

We know that the equilibrium constant shows the extent to which reactants are converted into products.

Now;

2NO2 ⇄ N2O4

[NO2] = 0.500 mol /1 L =  0.500 M

[N2O4] =  0.186 mol  /1 L =  0.186 M

The ICE table is;

          2NO2 ⇄ N2O4

I           0.5           0

C         -2x              +x

E          0.5 - 2x     0.186

The concentration of NO2 at equilibrium = 0.5 - 2(0.186) = 0.128

Keq =  0.186/( 0.128)^2

Keq = 11.3

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Answer:

The elements of groups 13, 14, 15, 16, 17, 18 are called p block elements.examples: boron (B), aluminium (Al), gallium (Ga), indium (In), thallium (Tl),and so on

Explanation:

Answer: c

Explanation: pretty sure its c :]

The atomic number of the resulting nuclide after both processes is Z+1

Define atomic number.

The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number (symbol Z).

Three fundamental processes, including the emission of alpha particles, beta rays, and ayos range, are involved in radioactive decay.

An rise in the atomic number of a unit is implied by the emission of a beta ray, which signifies the transition of a neutral into a proton.

Z ----> Z +1

Since the two particles' masses are nearly equal, the atomic mass remains constant, hence an antineutrino must also be released to counteract the reaction.

When the daughter particle emits a gamma ray, it transitions from its execrated state to its base state without changing its atomic mass or number.

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Answer:

The sugar in DNA is deoxyribose. ... Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. There are two groups of bases: Pyrimidines: Cytosine and Thymine each have a single six-member ring.

Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.

Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the deoxyribonucleic acid and ribonucleic acid polymers, which are both crucial macromolecules for all kinds of life on Earth.

Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.

The quantity of phosphate residues that a nucleotide has determined its name. Adenosine triphosphate, for instance, is the name of a nucleotide that consists of an adenine base and three phosphate residues (ATP). Adenosine diphosphate would be the nucleotide if it has two phosphates (ADP).

Thus, Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA.

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The metal having the greater capacity for specific heat. A metal with a higher heat capacity will take more energy to raise its temperature by one temperature unit.

As a result, the heat capacity of two objects constructed of the same material but of different masses will vary. This is so because while specific heat is a property of every object constructed of the same material, heat capacity is a property of an object.

The metal with the highest specific heat will see the smallest temperature change.

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Answer:

19.6 mole

Explanation:

because Fe molar mass is 56

The question is: 10 g of carbonic acid H2CO3 are dissolved in 150 g of water. Determine the% m / m concentration of that solution?

Answer: The% m / m concentration of that solution is 6.66%.

Explanation:

Given: Mass of solute = 10 g

Mass of solvent = 150 g

Formula used to calculate the %m/m is as follows.

\(Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100\)

Substitute the values into above formula as follows.

\(Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100\\= \frac{10 g}{150 g} \times 100\\= 6.66%\)

Thus, we can conclude that the% m / m concentration of that solution is 6.66%.

To calculate the specific heat of silver, you will need to use the formula:

So for this example, we can calculate the specific heat of silver as follows:

Therefore, the specific heat of silver is 0.523 J/g°C.

The specific heat of silver is a measure of the amount of energy required to increase the temperature of one gram of silver by one degree Celsius. This value is important in understanding how different materials respond to temperature changes and can be used in many areas of science and engineering.

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If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will not demonstrate the effect.

The radiation is also known as the electromagnetic radiation. The energy that emittance from the source  and travel thorough space at speed is called as radiations. A dose below the threshold level for the skin burn will not demonstrate the effect.

Thus, If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will not demonstrate the effect.

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The right response is d. Both enzymes will have the same ΔG for catalysis.

The reaction rate and equilibrium constant have an impact on the Gibbs free energy (ΔG). No matter the source of the enzyme, such as E. coli or a thermophilic microbe, the ΔG for a reaction is the same. As a result, both enzymes will have the same ΔG for sucrose hydrolysis.

The ΔG may be written mathematically as:

ΔG = -RT ln (K)

T is the temperature, K is the equilibrium constant, and R is the gas constant..

As both enzymes have the same reaction rate (K) and temperature (T), the reaction's ΔG  value will likewise be the same.

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The correct option is (2) may occupy half of the tetrahedral holes in the lattice. This arrangement allows for a 1:1 ratio between the cations and anions, maintaining the chemical formula of MX.

In a simple cubic lattice, the anions (Xn-) occupy the lattice points, forming a cubic arrangement. The cations (Mn+) can occupy the vacant spaces in the lattice, which are referred to as holes.

In this case, the MX compound has the cations (Mn+) and anions (Xn-) in a 1:1 ratio. The cations can occupy two types of holes: cubic holes and tetrahedral holes.

Cubic Holes: Each cubic hole is surrounded by eight anions, forming a cube. In a simple cubic lattice, there is one cubic hole at the center of each edge and one cubic hole at the center of each face. The number of cubic holes is equal to the number of lattice points. If the cations occupy all of the cubic holes, the ratio of cations to anions becomes 1:1, which is not consistent with the formula MX. Therefore, the cations cannot occupy all of the cubic holes.

Tetrahedral Holes: Each tetrahedral hole is surrounded by four anions, forming a tetrahedron. In a simple cubic lattice, there is one tetrahedral hole at the center of each face diagonal. The number of tetrahedral holes is twice the number of lattice points. If the cations occupy half of the tetrahedral holes, the ratio of cations to anions becomes 1:1, consistent with the formula MX. Therefore, the cations may occupy half of the tetrahedral holes.

Based on the arrangement of anions and the cations in a simple cubic lattice, the cations in the MX compound can occupy half of the tetrahedral holes. This arrangement allows for a 1:1 ratio between the cations and anions, maintaining the chemical formula of MX.

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The following molecule is neither E or Z configuration , it is the trans configuration.

The cis and trans approach will works  if there is two identical groups that are connected to the double bond.  The E, Z configuration works for the different substituent. the higher priority group on the each carbon is on the same or the opposite side of double bond. It is depends on the priority of the group.

The same group priority are on the same side of carbon double then it will be the Z configuration. If the same priority groups are on the opposite side than the configuration will be E configuration.

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Answer:

There are 2.81 * 10^24 atoms present

Explanation:

To get this, we need to know the number of moles present in 140gramms of carbon.

Mathematically;

number of moles = mass/molar mass

molar mass of glucose is = 180 g/mol

So the number of moles will be ;

140/180 = 0.7778 mole

1 mole of glucose contains 6 moles of carbon;

so 0.7778 moles will contain = 4.667 moles

Mathematically, the number of atoms in 1 mole is 6.02 * 10^23 atoms

The number of atoms in 4.667 moles will be :

4.667 * 6.02 * 10^23 = 2.81 * 10^24 atoms

Glycogen, a polymer of glucose, is held together by glycosidic bonds, including the bonds at its branch points.

Glycogen is a complex carbohydrate that serves as a storage form of glucose in animals, including humans. It is made up of glucose units linked together through glycosidic bonds. These bonds form between the hydroxyl (OH) group of one glucose molecule and the anomeric carbon (C1) of another glucose molecule, resulting in a linear chain of glucose units.

Additionally, glycogen has branch points where the chain is extended by the formation of α-1,6-glycosidic bonds. These branch points contribute to the highly branched structure of glycogen, allowing for more efficient storage and rapid release of glucose when needed.

Therefore, the bonds that hold glycogen together, both in the linear chain and at the branch points, are glycosidic bonds. These bonds play a crucial role in maintaining the integrity and functionality of glycogen as a storage form of glucose in the body.

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Answer:

b

Explanation:

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have a great day

The reaction equation is:Cyclopentanecarboxylic acid + NaOH → Sodium cyclopentanecarboxylate + H2OThe counterion is the sodium ion (Na+).

1. When hexanoyl chloride is treated with C6H5CO2Na, the major product formed is  C6H5CO2H. The reaction takes place through a nucleophilic substitution process. This involves the substitution of the chlorine atom in the hexanoyl chloride with the carboxylate group (-CO2Na) from sodium benzoate (C6H5CO2Na). The reaction equation is:Hexanoyl chloride + C6H5CO2Na → C6H5CO2H + CH3(CH2)4COCl + NaCl2. When cyclopentanecarboxylic acid is treated with [H+], EtOH, the major product formed is cyclopentanecarboxylic acid ethyl ester. The reaction between cyclopentanecarboxylic acid and EtOH is an esterification reaction. The reaction equation is:Cyclopentanecarboxylic acid + EtOH → Cyclopentanecarboxylic acid ethyl ester + H2O3. When cyclopentanecarboxylic acid is treated with NaOH, the major product formed is sodium cyclopentanecarboxylate. The reaction between cyclopentanecarboxylic acid and NaOH is a neutralization reaction. The reaction equation is:Cyclopentanecarboxylic acid + NaOH → Sodium cyclopentanecarboxylate + H2OThe counterion is the sodium ion (Na+).

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Answer:

Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. This occurs when the internal energy of the solid increases, typically by the application of heat or pressure, which increases the substance's temperature to the melting point.

The number if moles of carbon and chlorine here is 0.08 and that of hydrogen is 0.16. Then, the empirical formula is CH₂Cl. The molecular formula of the compound is C₂H₄Cl₂.

Empirical formula of a compound is derived from the number of moles of constituent elements present in the compound.

Given ,

Mass of carbon = 0.96 g

atomic mass = 12 g/mol

no.of moles  = 0.96 /12 = 0.08

mass of H = 0.16 g

atomic mass = 1 g

then no.of moles = 1

mass of Cl = 2.84 g

atomic mass = 35.5 h/mol

no.of moles =2.84 /35.5 = 0.08 moles.

The ration of the no.of moles of C, H and Cl is 0.08 : 0.16 :0.08 . Convert them to whole number ratio , we get, 1 :2 : 1,

Thus, the empirical formula is CH₂Cl.

Given, the molecular mass = 99 g

empirical formula mass = (12 + 1 + 35.5 ) =  49.5

99 /49.5 = 2.

multiply the empirical formula by 2 . We het the molecular formula of the compound C₂H₄Cl₂.

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