What is the % of each element in Al2(CrO4)3

Answer:

A. Solubility

Explanation:

got it right on edge 2022

The energy required for 100.0 g of iron to change from 25 °C to 50 °C is 1122.25 J.

To calculate the energy required for 100.0 g of iron to change temperature from 25 °C to 50 °C, we can use the formula for heat transfer:

q = m * C * ΔT

where:

Given:

Mass of iron (m) = 100.0 g

Specific heat capacity of iron (C) = 0.449 J/(g°C)

Change in temperature (ΔT) = Final temperature - Initial temperature = 50 °C - 25 °C = 25 °C

Plugging in the given values into the formula:

q = 100.0 g * 0.449 J/(g°C) * 25 °C

q = 1122.25 J

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Reagents that can be used to convert 1-pentyne into 1-bromopentane is HBr (1 equiv.), ROOR.

The reaction of 1-pentyne with HBr (hydrogen bromide) in the presence of a radical initiator such as ROOR (e.g., benzoyl peroxide) will produce 1-bromopentane.

This is a radical addition reaction where the H-Br bond is cleaved homolytically to form Br radical, which attacks the alkyne to form a more stable radical.

The radical then combines with another H-Br molecule to form the product 1-bromopentane.

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580.47 Kelvin

Gas stored in a tank at 273 K has a pressure of 388 kPa. The safe limit for pressure is 825 kPa.

temperature will the gas reach this pressure =

as per above statement, we have got

p1 = 388 kPa                     P2 =  825 kPa

T1 = 273 K                         T2 =

as per ideal gas equation PV = nRT

since n, V , R is constant , so we ignore them,

now equation will become

P1/T1 = P2T2

now putting the values

388/273 = 825/T2

T2 = 825 * 273 ÷ 388

T2 = 224,225/388

T2 = 580.47 Kelvin

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Answer:

Explanation:

The energy flow in the form of heat is a consequence of a difference in temperatures. When two objects with different temperatures are put in contact, the energy will flow from the object with the highest temperature to the one with the lowest temperature.

In this case, the thermometer first had a temperature of 22ºC. Then it was placed in a beaker of water and it read 45ºC. Therefore, the temperature gained by the thermometer is a consequence of the transmission of heat from the water in the beaker, which was at a higher temperature.

Cells prefer purine and pyrimidine salvage pathways over de novo synthesis because of less input energy requirement.

The key difference between de novo and salvage pathway is that de novo synthesis of purine nucleotides refers to the process that utilizes small molecules such as phosphoribosyl, amino acids, CO2 etc. as raw materials to produce purine nucleotides.

While salvage pathway of purine synthesis refers to the process that utilizes purine bases and purine nucleosides in order to produce purine nucleotides.

The nucleotide salvage pathway enzyme purine nucleoside phosphorylase (PNP) is found in many organs, although it seems to be most abundant in the liver's hepatocytes, Kupffer cells, and sinusoidal endothelial cells. Purine bases like adenine, guanine, and others are produced during the metabolic breakdown of nucleotides and nucleic acids.

This route is less complicated and uses a lot less energy. De novo synthesis and nucleoside salvage are two different strategies to make nucleotides. The salvage pathway obtains nucleosides or bases created during DNA or RNA degradation, in contrast to the de novo pathway, which creates nucleotides from amino acids and glucose.

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The number of entities in a mole (to 4 significant figures) is equal to 6.022 x 10²³ multiplied by 10 to the power of 0 and is called Avogadro's number.

Avogadro's number is the number of atoms or molecules present in one mole of a substance. It is denoted by 'NA'.It is the amount of particles present in 12 grams of carbon-12. It is equal to 6.02214179(30) × 10²³ mol⁻¹. It is dimensionless and it is approximately equal to 6.022 x 10²³, which means one mole of any substance contains 6.022 x 10²³ entities.

Amedeo Avogadro, an Italian physicist who made substantial advances to our understanding of molecular theory, is honoured by having his number named after him. It is essential to comprehend the connection between the macroscopic world of substances and reactions and the tiny world of atoms and molecules since it represents a fundamental idea in chemistry.

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At high temperatures, a diatomic molecule possesses a total of six degrees of freedom.

Because a gas molecule may travel in any direction, it has three translational degrees of freedom. This is true for all gas molecules, whether monatomic, diatomic, or polyatomic, since every molecule in three-dimensional space may travel freely in all directions.

As a result, a diatomic molecule possesses five degrees of freedom: three translational and two translational.

As a result, a diatomic gas molecule possesses 6 degrees of freedom. This set may be divided into molecular translations, rotations, and vibrations. Three degrees of freedom are accounted for by the whole molecule's center of mass motion.

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C: carbon is getting oxidised in the reaction. Oxidation and reduction both takes place in a redox reaction.

In k2Cr2O7 , the K is in + 1 oxidation state , Cr is in + 6 oxidation state, and O is in -2 oxidation state

On the right hand side Cr is in +3 oxidation state that means Cr is getting reduced in the reaction.

In C3H8O2 , H and O are ih their general oxidation states +1 and -2 respectively. Here alcoholic group is getting oxidised to carboxylic group. So C is getting oxidised.

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Answer:

C3h8o2

Explanation: oxidation and reduction simultaneously occurs in a redox reaction. Atoms in a molecule during oxidation and reduction changes the oxidation state, in case of oxidation, it increases while in the case of reduction it decreases.

In the given reaction K,Cr, and O have oxidation number +1,+6 and -2 in K2Cr2O7. But on the right side, the oxidation state of Cr changes to +3 and gets reduced in the reaction. Similarly, C3H8O2 undergoes oxidation to C3H8O4,where the alcoholic group get oxidized to carboxylic acid.

The standard reaction enthalpy for the given reaction is +235.8 kJ/mol.

The standard reaction enthalpy (ΔH°) for the given reaction is determined as follows:

Equation of reaction: 3 Fe₂O₃ (s) → 2 Fe₃O₄ (s) + ½ O₂ (g)

The standard enthalpy of formation values for Fe₂O₃ (s), Fe₃O₄(s), and O₂(g) is used to calculate the standard reaction enthalpy.

ΔH° = [2 × ΔH°f(Fe₂O₃)] + [½ × ΔH°f(O₂)] - [3 × ΔH°f(Fe₃O₄)]

where;

ΔH°f(Fe₂O₃) = -824.2 kJ/mol

ΔH°f(Fe₃O₄) = -1118.4 kJ/mol

ΔH°f(O₂) = 0 kJ/mol

ΔH° = [2 × (-1118.4 kJ/mol)] + [½ × 0 kJ/mol] - [3 × (-824.2 kJ/mol)]

ΔH° = -2236.8 kJ/mol + 0 kJ/mol + 2472.6 kJ/mol

ΔH° = 235.8 kJ/mol

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Compaction during diagenesis reduces the porosity and permeability of sedimentary rocks by compressing the grains and decreasing the volume of pore spaces.

The diagenesis process of compaction refers to the reduction in the volume of sedimentary rocks due to the weight of overlying layers and the expulsion of water and air from the pore spaces. This process has significant effects on the permeability and porosity of the rocks.

During compaction, the weight of the overlying sediments compresses the underlying layers, causing the grains to come closer together. As a result, the pore spaces between the grains decrease, leading to a reduction in porosity. Additionally, the expulsion of water and air from the pores further decreases the volume of the rock.

The decrease in porosity and volume during compaction has a direct impact on permeability. With reduced pore spaces, the pathways for fluid flow become narrower, limiting the permeability of the rock. Therefore, compaction generally decreases both porosity and permeability.

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Answer:

45.8 CO2 = 1.0406843976868674mol

Explanation:

How many grams CO2 in 1 mol? The answer is 44.0095. We assume you are converting between grams CO2 and mole. You can view more details on each measurement unit: molecular weight of CO2 or mol This compound is also known as Carbon Dioxide.

Credit;

Convert grams CO2 to moles - Conversion of Measurement ...

Answer:

8.9x1023

Explanation:

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option D.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

When two or more substances mix, they form a material having considerably distinct chemical or physical characteristics. As a result, the material has different properties than the separate components. Thee are called composite material. Bulletproof glass (made by combining layers of different types of plastic and glass) is an example of a composite material.

Therefore, the correct option is option D.

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Answer:

B. Ca is the answer

Explanation:

i took the test

The element would most likely have chemical properties similar to that of magnesium (Mg) is Ca.

An attribute of a specific material that is seen in a chemical reaction was called a chemical property. Major chemical characteristics include chemical stability, flammability, toxicity, the heat of combustion, pH value, and rates of radioactive decay.

A substance that could not be further decomposed through any chemical reaction would be known as a chemical element.

The magnesium and calcium belongs to identical group hence, both elements have same valence electrons including chemical property.

Therefore, the correct answer will be option (B).

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Answer:

The formula of the precipitate formed is AgN₃ (Silver azide).

On adding aqueous ammonia to the precipitate formed, the precipitate dissolves due to the formation of a soluble complex compound with aqueous ammonia.

Explanation:

Sodium azide is NaN₃

Silver Nitrate is AgNO₃

The two of them react and theres a double displacement where the ions exchange radicals.

NaN₃(aq) + AgNO₃(aq) → NaNO₃(aq) + AgN₃(s)

The azide ion (N₃⁻), which has very similar chemical properties as the chloride ion (Cl⁻), also forms an insoluble compound with Silver.

And just like AgCl, the precipitate (AgN₃) also dissolves when ammonia is added by forming a soluble complex.

AgN₃(s) + 2NH₃(aq) → [Ag(NH₃)₂]N₃(aq)

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Answer:

Q1. B

Q2. D

Q3. C

Hope it helps............

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Answer:

nitrogen

nitrogen oxide

zincflorite

?

potassium oxide

Answer:

0.0500

Explanation:

Your Q is not visible .Plz provide it

2. D, because transition metals have a high density.

3. B, because the properties of elements depend on the valence electrons.

4. C, because the atom emits a negatively charged electron, the atom becomes positively charged.

5. D, because hydrogen and helium are both lighter than air, but hydrogen is very reactive, that's why helium is used.

6. A, because it creates caustic soda.

7. C, because only fluorine and argon are gases, but argon is not two-molecular.

8. C, because iodine is either solid or gaseous. Solid iodine is gray and gaseous iodine is purple.

9. C, because all elements of the first main group have an odd number of protons and react violently with water.

10. D, because oxygen is air. Nitrogen is very reactive and helium is lighter than air.

11. A, because carbon has atomic number 6 and magnesium has atomic number 12.

12. B, because table salt is sodium chloride.

13. B, because sodium ions and neon have the same electron configuration.

14. C, because chloride ions and argon have the same electron configuration.

15. C, because calcium ions and argon have the same electron configuration.

16. D

17. C, because silicon has 4 valence electrons and a total of 14 electrons.

18. A

19. B, because it's sodium.

20. Number of protons and electron shells

21. first main group

22. seventh main group

23. cesium

24. fluorine

25. alkali metals

26. alkaline earth metals

27. halogens

28. from metal to nonmetal

29. valence electrons

30. electron shells

31. main group and subgroup

32. semi-metal

33. 18 groups and 7 periods

34. groups

35. periods

Answer:

its definitely A

Explanation:

hope this helps

Explanation:

350 g  *  25 C  * .39 J / (g C) = ~ 3400 J

Answer:

The reaction absorbs energy ( + or exothermic)

Explanation:

When the temperature of a thermometer increases during a chemical reaction, then the reaction absorbs energy (+ or endothermic). Therefore, the correct option is B.

A rise in the temperature of a thermometer during a chemical reaction is a sign that the system is absorbing energy. This implies that the reaction is endothermic, meaning that energy must be supplied for it to proceed. Generally, endothermic reactions take heat from the environment and raise the temperature. Chemical bonds are broken and the process is accelerated by the absorbed energy.

Therefore, the correct option is B.

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The chemist is likely planning a solid-phase oligosaccharide synthesis experiment.

Solid-phase oligosaccharide synthesis involves the stepwise assembly of carbohydrate chains on a solid support using blocking groups and activating groups. The blocking groups protect specific functional groups to ensure selective reactions, while the activating groups enhance the reactivity of certain functional groups during the synthesis process. This method allows for the controlled and sequential addition of monosaccharide units to build up complex oligosaccharide structures. The resulting oligosaccharides can then be analyzed using various techniques such as nuclear magnetic resonance (NMR) analysis, liquid chromatography mass spectrometry/mass spectrometry (LC-MS/MS) analysis, or other analytical methods to characterize their structure and properties.

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Answer:

1.91 x 450 molecules

Explanation:

1. The equilibrium expression for the compound is:

[Cd²⁺] [CO₃²⁻] / [CdCO₃]

2. The solubility of product, Ksp for the compound is  1.0×10⁻¹²

Equilibrium constant, Keq for a given chemical reaction is written as shown below:

nReactant ⇌ mProduct

Equilibrium constant (Keq) = [Product]ᵐ / [Reactant]ⁿ

Now, we can shall determine the equilibrium expression, Keq for the reaction. Details below:

CdCO₃(aq) ⇌ Cd²⁺(aq) +  CO₃²⁻(aq)

Equilibrium constant (Keq) = [Product]ᵐ / [Reactant]ⁿ

Equilibrium constant expression = [Cd²⁺] [CO₃²⁻]/ [CdCO₃]

The solubility of product, Ksp for the compound ca be obtained as follow:

Ksp = [Cd²⁺] × [CO₃²⁻]

Ksp = 1.0×10⁻⁶ × 1.0×10⁻⁶

Ksp = 1.0×10⁻¹²

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Answer:

1) Meter (length), Gram (mass), Liter (volume)

2) Let 92.4 mm  =   x m

  since 1000 mm = 1 m

⇒ x = 92.4  ÷ 1000

     x = 0.924 m      

 ∴ 92.4 mm  =   0.924 m

3)   Lets covert 4.2 m to cm = 420 cm

      ∴ 4.2 m > 42 cm

The temperature of the crystal is increased, the vibrations of the atoms will become greater, the atoms will have more energy and will move further from their equilibrium position

Given that the alloy is an 81 wt% Fe−19 wt% V alloy, and all vanadium is in solid solution. At room temperature, the crystal structure for this alloy is BCC.

We have to find the unit cell edge length, a and the effect of increasing the temperature.

To calculate the unit cell edge length for an 81 wt% Fe−19 wt% V alloy, we will use the formula;

For BCC, the number of atoms per unit cell (Z) = 2a^3/Z^3Where Z is the coordination number for a BCC lattice.

For BCC, Z= 8 (number of atoms in a unit cell).We know that the atomic weight of Fe and V is 55.85 g/mol and 50.94 g/mol respectively.

Atomic weight of the given alloy = 81 × 55.85 + 19 × 50.94 = 2967.74Atomic radius of Fe = 0.126 nm

Atomic radius of V = 0.134 nm

Now, Unit cell edge length a = 4/√3 × r

Where r = (rFe + rV) /2 = (0.126 + 0.134) / 2 = 0.130 nm

Hence a = 0.287 nm

At room temperature, the crystal structure for this alloy is BCC.

The effect of increasing temperature on this alloy is that it will expand. The lattice parameter will increase and the unit cell edge length will also increase.

When the temperature of the crystal is increased, the vibrations of the atoms will become greater, the atoms will have more energy and will move further from their equilibrium position. This increased movement will cause the lattice to expand, causing the unit cell edge length to increase.

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Answer: Nuclear fusion

Explanation:

I think

Answer:

(2) Ammonia I hope you good luck

(1) aluminum

Let's look at all the options first:

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