How many total atoms are in 0.550 g of P2O5?

Answer:

c) H2O and HSO4-

Explanation:

The dehydration of 2-methylcyclohexanol occurs in the presence of H2SO4. Recall that acids are proton donors in solution; the equilibrium shown below is then set up,

H2SO4(aq)  +  H2O(l) ⇄H3O^+(aq) + HSO4^-(aq)

The species H2O and HSO4- are two proton acceptors in the system. According to the Brownstead- Lowry definition, a base is a proton acceptor in solution.

Hence H2O and HSO4- are bases present in the dehydration of 2-methylcyclohexanol.

Answer:

That is correct my dude

Explanation:

Answer:

0.0387 moles SF₆

Explanation:

To find the moles of sulfur hexafluoride (SF₆), you need to multiply the number of molecules by Avogadro's number. Avogadro's number is a ratio between molecules and moles. It is important to arrange the conversion in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 3 sig figs to match the sig figs of the given value (2.33 x 10²²).

Avogadro's Number:

6.022 x 10²³ molecules = 1 mole

2.33 x 10²² molecules SF₆                    1 mole
---------------------------------------  x  ------------------------------------  =  0.0387 moles SF₆
                                                    6.022 x 10²³ molecules

Isomers are molecules having the same molecular formula and different structural formulas. The types of structural isomerism we have include;

• Chain isomerism

• Position isomerism

• Functional isomerism

Chain isomerism: This type of isomerism occurs due to the presence and possibility of branching in a hydrocarbon or the difference in the arrangement of C atoms in the chain.

• For example, butane (C₄H₁₀) has ,two isomers,. Carbon atoms lie in a ,straight chain ,while the other is branched.

• Another example is ,pentane, (C5H12) with 3 chain isomers

Position Isomerism: This type of isomerism occurs due to the position of the functional groups in a molecule.

• For instance, C₃H₇Br has two structural formulas. What differentiates these formulas is the position of bromine atoms in both formulas. In one of the structures, bromine is on the ,end of the chain,, whereas i,n the other it is attached in the middle.

• Another example of a compound that exhibit position isomerism is ,C6H4Br2,, with ,three isomers,: 1,2- dibromobenzene, 1,3 dibromobenzene, and 1,4-dibromobenzene

Functional group isomerism: In this type of isomerism, the isomers belong to different families of compounds (different homologous series).

• Examples of functional group isomerism are ,C3H6O, which can be either ,propanal ,(an aldehyde) or, propanone, (a ketone) and ,C3H6O2, that can either be ,methyl ethanoate, or ,propionic acid.

The solution has a molarity of 0.0924 M.

The number of moles of solute per litre of solution is known as molarity.. For instance, water is both the solution and the solute when table salt is dissolved in it. Each mole of sodium chloride weighs 58.44 grammes. 58.44 grammes of sodium chloride are dissolved in one litre of water to produce one molar solution, or 1M.

Moles of solute per litre of solution is known as molarity (M).

Given: moles of NH3 = 0.355, volume of solution = 3.84 L

Molarity = 0.355 moles / 3.84 L = 0.0924 M

Therefore, the molarity of the solution is 0.0924 M.

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Answer:

Kc = 2.55x10⁻³

Kp = 10.97

Explanation:

Based on the reaction:

2 NH₃(g) ⇄ N₂(g) + 3H₂(g)

2 moles of ammonia produce 1 mole of nitrogen and 3 of hydrogen.

Kc is defined as:

Kc = [N₂] [H₂]³ / [NH₃]²

When 2.00 moles of NH₃ are added in a vessel and the reaction occurs, when the reaction is in equilibrium the moles of each specie is:

NH₃: 2.00moles - 2X

N₂: X

H₂: 3X

Where X represents reaction coordinate.

As moles in equilibrium of NH₃ are 1.740moles:

1.740 mol = 2.00 - 2X

0.13moles = X

That means moles of N₂ are 0.13 and H₂ 0.39

Replacing in Kc formula:

Kc = [0.13] [0.39]³ / [1.74]²

To obtain Kp from Kc you need to use the formula:

Kp = Kc (RT)^Δn

Where R is 0.082atmL/molK, T is temperature in Kelvin (800K) and Δn is change in moles of gas, that is moles of products - moles of reactants ( 4 - 2 = 2)

Replacing:

Kp = 2.55x10⁻³(0.082atmL/molKₓ800K)²7

The values of Kp and Kc for the decomposition reaction of ammonia at 800k is 2.5 × 10⁻³ and 10.97 respectively.

Kp and Kc both are equilibrium constants with respect to the partial pressure and concentration in molaity respectively.

Given chemical reaction with ICE table will be represented as:

                          2 NH₃(g)  ⇄  N₂(g)  +  3H₂(g)

Initial:                        2                0            0

Change:                  -2x              +x          +3x

Equilibrium:            2-2x             x             3x

According to the question moles of NH₃ at equilibrium is 1.740 mol, so

2 - 2x = 1.740 mol

x = 0.13moles

Kc equation for the given reaction is:

Kc = [N₂].[H₂]³ / [NH₃]²

Kc = (x).(3x)³ / (0.13)²

Kc = 2.5 × 10⁻³

Kp will be calculated as:

Kp =  Kc.(RT)ⁿ, where

R = universal gas constant = 0.082atmL/mol.K

T = temperature = 800K

n = change in moles = 4 -2 = 2

Kp = (2.5 × 10⁻³)[(0.082)(800)]²

Kp = 10.97.

Hence value of Kp & Kc is 2.5 × 10⁻³ and 10.97 respectively.

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The quantity of protons, neutrons, and electrons that each element has makes it unique.

Each chemical element's atoms has the same number of protons and electrons, which is important because neutrons' quantities are variable.

Isotopes are atoms with the same number of protons but differing numbers of neutrons.

They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties. There are unstable isotopes that emit radiation as well as stable isotopes that do not. These are referred to as radioisotopes.

Thus, The quantity of protons, neutrons, and electrons that each element has makes it unique.

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Answer:

What process formed this delta?

A.) erosion and deposition

Explanation:

You're welcome.

Answer:

Erosion and deposition

Explanation:

Erosion happens as a result of the washing away of the top soil and this usually goes along with the deposition of some particles; loose or fine, mainly sand. So yes, the answer is option a.

Explanation:

The theoretical volume of ammonia that should be produced in the Haber process if we start with 5.0 L of nitrogen (N2) at standard temperature and pressure (STP) can be calculated as follows:

1 mole of N2 reacts with 3 moles of H2 to form 2 moles of NH3

Thus, the number of moles of N2 present can be calculated using the Ideal Gas Law:

PV = nRT

Where n is the number of moles of gas, R is the gas constant, T is the temperature in Kelvin, P is the pressure in atmospheres, and V is the volume in liters.

At STP (0°C and 1 atm), the volume of one mole of gas is 24.45 L.

Given 5.0 L of N2 at STP, the number of moles of N2 can be calculated as:

n = (PV)/RT = (1 atm)(5.0 L)/(0.0821 atmL/molK)(273 K) = 1.96 moles

The number of moles of NH3 produced can then be calculated as:

n = (2 moles of NH3)/(1 mole of N2) = 2 moles/1 mole = 2 moles

The volume of NH3 can be calculated as:

V = nRT/P = (2 moles)(0.0821 atmL/molK)(273 K)/(1 atm) = 44.8 L

So, the theoretical volume of ammonia (NH3) that should be produced if we start with 5.0 L of N2 at STP is 44.8 L.

Answer:

intermolecular interactions

Explanation:

hope this helps

The intermolecular attraction keeps molecules together in a liquid and stops them from becoming a gas.

The electromagnetic forces of attraction and repulsion that act between atoms and other types of nearby particles, such as atoms or ions, are examples of intermolecular forces.

Liquids have qualities that are halfway between gases and solids, yet they are closer to solids. Intermolecular forces, in opposed to intramolecular forces like covalent ties that bind atoms together in molecules as well as polyatomic ions, keep molecules with each other in a liquid or solid.

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Answer:

Molar mass of the unknown gas is 64.6 g/mol

Explanation:

Let's think this excersise with the Ideal Gases Law.

We start from the N₂. At STP conditions we know that 1 mol of anything occupies 22.4L.

We apply: P . V = n . R . T

5 atm . V = 1 mol . 0.082 . 325K

V = (1 mol . 0.082 . 325K) / 5 atm = 5.33 L

It is reasonable to say that, if we have more pressure, we may have less volume.

As this is the volume for 1 mol of N₂, our mass is 28 g. Then, the density of the nitrogen and the unknown gas is 28 g/5.33L = 5.25 g/L

Our unknown gas has, this density at 27°C and 2 atm.

If we star from this, again: 1 mol of any gas occupy 22.4L at STP, we can calculate the volume for 1 mol at those conditions:

P₁ . V₁ / T₁ = P₂ . V₂ / T₂

1 atm . 22,4L / 273K = 2 atm . V₂ / 300K

Remember that the value for T° is Absolute (T°C + 273)

[ (1 atm . 22.4L / 273K) . 300K] / 2 atm = V₂ → 12.3L

This is the volume for 1 mol of the unknown gas at 2 atm and 27°C

We use density to determine the mass: 12.3 L . 5.25 g/L = 64.6 g

That's the molar mass: 64.6 g/mol

Answer:

B. NH₃ (l) dissolves in water to form a solution

Explanation:

A solution is a uniform or homogenous mixture of two or more substances. The components of a solution are the solute and solvent. The solute is the substance that is being dissolved in another substance. The solvent is the substance which dissolves the solute.

Mixing the given solutes in water results innthe following:

A. Helium being an inert gas does not dissolve in water at all. Therefore, no solution is formed.

B. Liquid ammonia is very solution in water. When mixed with water, it dissolves in water to form aqueous ammonia solution. Aqueous ammonia is an alkaline solution of ammonia dissolved in water.

C. Silicon (iv) oxide, SiO₂, is a crystalline solid whichnis completely insoluble in water. Mixing it with water does not result in the formation of a solution.

D. Pentane, C₅H₁₂, is a liquid hydrocarbon substance which is insoluble in water. It does not mix with water to form a solution, rather it forms two separate immiscible layers of liquids.

Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.

A word equation is one in which the equation that is shown in the reaction is written in words rather than by the use of the chemical symbols of the elements that are involved.

We have the reaction; \(2H_{2} (g) + O_{2} (g) ---- > 2H_{2} O(l)\), in order for this reaction to be written in the word equation form we have; Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.

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Answer:

The smallest scale division is a tenth of a centimeter or 1 mm

Explanation:

The balanced chemical equations for the given chemical reactions are given serially i) 2 Na+Cl₂ 2 NaCl  ii) 4 H₂O₂ 4 H₂O + 2 O₂  iii)CH₄ +2 O₂CO₂ +2 H₂O

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguine in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

ag and au are sure not to react. but hg and sn might or might not

Considering the definition of empirical and molecular formula,  the molecular formula is P₇N₇O₁₄.

The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.

The molecular formula is the chemical formula that indicates the number and type of different atoms present in the molecule. The molecular formula is the actual number of atoms that make up a molecule.

In other words, the molecular formula is the actual formula of the molecule and is made up of the symbols that represent the chemical elements and the subscripts that indicate the number of atoms of each element that participate in the formation of the molecule.

In this case, you know:

Assuming a 100 grams sample, the percentages match the grams in the sample. So you have 26.7 grams of P, 12.1 grams of N and 61.2 grams of Cl.

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

P: \(\frac{26.7 g}{31\frac{g}{mol} }\)= 0.86 moles

N: \(\frac{12.1 g}{14\frac{g}{mol} }\)= 0.86 moles

O: \(\frac{61.2 g}{35.45\frac{g}{mol} }\)= 1.72 moles

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

P: \(\frac{0.86 moles}{0.86 moles }\)= 1

N: \(\frac{0.86 moles}{0.86 moles }\)= 1

O: \(\frac{1.72 moles}{0.86 mole}\)= 2

Therefore the P: N: O mole ratio is 1: 1: 2

Then, the empirical formula is P₁N₁O₂= PNO₂, with a empirical mass of 31 g/mol + 14 g/mol + 2× 35.45 g/mol= 115.9 g/mol

The molecular formula can be calculated as MF= n(EF)

where:

In this case, the value n can be calculated:

n= 812 g/mol÷ 115.9 g/mol

Solving:

n= 7

Then, the molecular formula can be calculated as MF= 7×EF

Finally, the molecular formula is P₇N₇O₁₄.

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Answer:

Mass of mercury produced = 2.00 g

Explanation:

At room temperature and pressure, the temperature T = 25° C or 298.15 K while the pressure = 1 atmosphere or 760 mmHg.

Mass of oxide of mercury decomposed at room temperature and pressure = 2.16 g

Volume of oxygen produced = 120 cm³ or 0.12 dm³

One mole of any gas has a volume of 24 dm³ at room temperature and pressure.

Therefore, number of moles of oxygen produced = 0.12 dm³ / 24 dm³/mol = 0.005 moles

Mass of oxygen produced = number of moles × molar mass

Molar mass of oxygen = 32 g/mol

Mass of oxygen produced = 0.005 moles × 32 g/mol = 0.16 g

Thus, mass of mercury produced = mass of mercury oxide decomposed - mass of oxygen produced

Mass of mercury produced = 2.16 g - 0.16 g

Mass of mercury produced = 2.00 g

The quantity which is used to determine the hotness or coldness of a particular object is known as the temperature. The given statement is true. A thermometer is used to measure the temperature.

An instrument which is used to measure the temperature of objects is defined as the thermometer. There are different types of thermometers, the thermometer which is used to measure the body temperature of human beings is called the clinical thermometer.

The lab thermometer is used to measure the freezing point, boiling point, etc. of the solutions. The liquid thermometers generally include both the Celsius and Fahrenheit temperature scales.

Thus thermometers are used to measure the temperature.

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Your question is incomplete most probably your question was:

State whether the given statement is true, a thermometer used to measure temperature.

Answer:

Explanation:

0.25 moles KCl = 19g KCl (molar mass KCl = 74.6g)

Answer:

1) As the temperature increased what happened to the N2O4 concentration, it decreased

2) Formation of products, products are the right hand side of the equation.

3) Right to left is exothermic

4) Change in enthalpy N2O4 ⇔2NO2, HR = -14 kcal

As it's an exothermic reaction, the enthalpy of the reactants is higher than the products and the sign of the HR will be negative.

Explanation:

N2O4 ⇔2NO2

(colorless) (reddish-brown)

1) As the temperature increased what happened to the N2O4 concentration, it decreased

2) Formation of products, products are the right hand side of the equation.

3) Right to left is exothermic

4) Change in enthalpy N2O4 ⇔2NO2, HR = -14 kcal

As it's an exothermic reaction, the enthalpy of the reactants is higher than the products and the sign of the HR will be negative.

Answer:

A speed lathe is a type of lathe that is designed to operate much faster than its common counterpart.

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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sulfide mineral is made of from metal and sulfphur

Sulfide, also written sulphide, is a category of chemicals that contain sulfur and one or more metals. The majority of sulfides have basic structural characteristics, great crystallographic symmetry, and numerous metal-like characteristics, such as metallic lustre and electrical conductivity.

Sulfides include, for instance, chalcopyrite, galena (the primary ore mineral for lead and silver), and cinnabar (the primary ore mineral for mercury) (which provides copper).

Sulfide minerals are composed of sulfur and one or more metals; sulfarsenides have some of the sulfur replaced with arsenic.

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The spectroscope has changed the way scientists looked for elements in that it allows for the identification of elements from compounds without a need to decompose the compounds.

A spectroscope also known as a spectrometer is an instrument that produces and analyzes the spectra or absorption lines using visible light.

The spectrometer measures and interprets the electromagnetic spectra that result from the interaction between electromagnetic radiation and matter.

These measurements are obtained or determined from the wavelength or frequency of the radiation.

A spectroscope is used to analyze and study the elemental components of compounds without having to decompose the compounds into elemental substances.

Thus, spectroscopes have proved to be useful in the study of the properties of elements in compounds.

Compounds are formed when two or more elements are combined together.

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Answer:

water freezing

Explanation:

i think so

Answer:

1st one

Explanation:

Answer:

Colder, less

Explanation:

I did the test