Determine the number of moles of c2o4 in a sample with 0.48 moles of mno4 at endpoint

The solution for this question is A. Destructive; constructive

The weathering of a tall mountain down into a low-lying hill involves the breakdown and erosion of the mountain over time, which is a destructive process. This process typically occurs due to various factors such as wind, water, and ice erosion, which gradually wear away the mountain's structure.

On the other hand, the buildup of sand dunes through the deposition of sediment is a constructive process. This occurs when wind or water carries and deposits sand or sediment in a specific location, gradually forming dunes over time.

Therefore, the weathering of a tall mountain represents a landform being changed through a destructive process, while the creation of sand dunes through the deposition of sediment represents a landform being created through a constructive process.

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Lithium has 3 protons in the nucleus.

Atomic number =number of protons =number of electrons

According to the question,

we have been given atomic number= 3

So, number of protons will be 3 and number of electrons will also be 3.

We can additionally calculate number of neutrons as follows-

number of neutrons= mass number - number of protons

                                   = 6.941 - 3

                                   ≈ 4

Hence, the number of protons in lithium will be 3.

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The nucleus of Lithium has three protons.

The number of protons or electrons in the nucleus of a neutral atom is known as its Atomic number.

The total mass of an atom's protons and neutrons is known as its mass number. (neutrons and protons added together Equals nucleons)

Atomic mass= Mass number + Neutrons

Atomic number equals the sum of the protons and electrons

Since, atomic number given is 3

Therefore, protons in the nucleus will be 3.

Additionally, we may determine the neutron number using the formula below.

mass number = number of neutrons + number of protons

⇒ 6.941 = number of neutrons + 3

⇒ number of neutrons will be approximately 4.

Thus, lithium will contain three protons.

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Answer:

Friction

Explanation:

The aim of the scientific notation is to be able to reduce the bulk of the figures that we have to deal with.

The aim of the scientific notation is to be able to reduce the bulk of the figures that we have to deal with. Thus, when we apply the scientific notation, we reduce the digits that we are dealing with to manageable number and this makes it easy for us to convey scientific information.

Let us now write the correct expression of the given numbers in scientific notation:

1) 8.443 * 10^-1

2) 3.567 * 10^8

3) 1.348 * 10^-1

4) 4.72 * 10^-6

5) 3.1673 * 10^0

6) 2.002 * 10^-4

7) 4.5973 * 10^-1

8) 1.25 * 10^0

9) 6.89 * 10^6

10) 1.25 * 10^1

11) -8.8643 * 10^-8

12) - 1.2594 * 10^0

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Answer:

he number of chemically non-equivalent hydrogens is 6.

Answer:

Here's what I get  

Explanation:

(i) Voltaic cell

A voltaic cell is a device that uses a chemical reaction to produce electrical energy.

(ii) Overall Cell Potential

The standard reduction potentials for the half-reactions are

                               ℰ°/V

Cu²⁺ + 2e⁻ ⇌ Cu    0.34

Zn²⁺ + 2e⁻ ⇌ Zn   -0.76

The half-reaction with the more positive potential is the reduction half-reaction. It is the reaction that occurs at the cathode.

The half-reaction with the more negative potential is the oxidation half-reaction. It is the  reaction that occurs at the anode.

We reverse that half-reaction and subtract the voltages to get the cell reaction.

                                                          ℰ°/V

Cathode:  Cu²⁺ + 2e⁻ ⇌ Cu              0.34

Anode:     Zn ⇌ Zn²⁺ + 2e⁻              -0.76

Cell:          Zn +  Cu²⁺ ⇌ Zn²⁺ + Cu    1.10

\(\mathcal{E}_{\text{cell}}^{\circ} = \mathcal{E}_{\text{cat}}^{\circ} - \mathcal{E}_{\text{an}}^{\circ} = \text{0.34 V} - \text{(-0.76 V)} = \text{0.34 V} + \text{0.76 V} = \textbf{1.10 V}\)

(iii) Diagram

The specific labels will depend on your textbook.

They are often as follows.

a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

The salt bridge enables ions to flow in the internal circuit and to maintain electrical neutrality in the two compartments.

It often consists of a saturated solution of KCl.

As Zn²⁺ ions form in the anode compartment, Cl⁻ ions move in to provide partners for them.

As Cu²⁺ ions are removed from the cathode compartment, K⁺ ions move in to replace them.

Answer:a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

Explanation:

Answer:B C E

Explanation:

Answer:

BCE

Explanation:

I got it right

Hope it helps

1) Groups of elements in the periodic table.

Metals are located in the middle and left side of the periodic table.

The second picture has correctly shaded the metals.

.

Therefore, the formal charge for each atom in nitrobenzene is: C: 0, N: 0, O: -1

The structure of nitrobenzene is:

   NO2

         |

____C____

       | |

   H C6H5

        |

        H

To determine the formal charge (FC) of each atom, we need to compare the number of valence electrons in the neutral atom to the number of electrons assigned to the atom in the molecule.

The FC of an atom is calculated using the formula:

FC = valence electrons - lone pair electrons - 1/2(bonding electrons)

Valence electrons for carbon (C) = 4

Valence electrons for nitrogen (N) = 5

Valence electrons for oxygen (O) = 6

FC for C = 4 - 0 - 1/2(8) = 0

FC for N = 5 - 2 - 1/2(6) = 0

FC for O = 6 - 4 - 1/2(4) = -1

An atom that is likely to be attracted to an anion is one that has a positive formal charge or is electron deficient. In nitrobenzene, the carbon atom is least electronegative and has a formal charge of 0, so it is more likely to be attracted to an anion.

An atom that is likely to be attracted to a cation is one that has a negative formal charge or is electron rich. In nitrobenzene, the oxygen atom has a formal charge of -1 and is therefore more likely to be attracted to a cation.

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Answer:

5 milliliters

Explanation:

Use the formula M1V1 = M2V2 where M is molarity and V is volume

Plug in numbers

(.25 M)(100 mL) = (5 M)V2

V2 = 5 mL

The volume of stock solution of 5M H₂SO₄ needed to prepare 100mL of 0.25M H₂SO₄ is 5mL.

Volume of stock solution to prepare any dilute solution will be calculated by using the following formula:

M₁V₁ = M₂V₂, where

M₁ & V₁ is the molarity and volume of stock solution, and

M₂ & V₂ is the molarity and volume of final prepared solution.

On putting values from the question to the above formula and calculate for the value of V₁ as:
V₁ = (0.25)(100) / (5)

V₁ = 5 mL

Hence required volume is 5mL.

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Answer:

For 1 mole of MgCl2, it would require 2 moles of KOH. ( 1 : 2 mole ratio)

Since you have 3 moles of KOH, it is in excess, and MgCl2 is the limiting reactant.

CH3OCH3 dipole-dipole forces.

The four forces are the electromagnetic force, gravity, a weak nuclear force, and the strong nuclear force, in that order.

Scientists have now measured the intensity of the strong force upto at 1.5 trillion electronvolts, that is approximately the average energy of each and every particle inside the universe soon after the Big Bang, after turning on the LHC, doubling their energy reach.

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Answer:

cinder cone: made of pieces of lava

shield volcano: wide summit, gentle slope

volcanic soil: rich in nutrients

caldera: bowl shaped depression

lava plateau: material fills in valleys

Explanation:

it’s right

Answer:

Caldera, Bowl-Shaped depression

Shield volcano, Wide summit, Gentle slope

Lava plateau, Material fills in valleys

Volcanic soil, Rich nutrients

Cinder Cone, Made of pieces of lava

Explanation:

Got it right on edge

The given statement "The molar enthalpy of sublimation of a given substance can be determined if its enthalpies of fusion and vaporization are known" is true.

The molar enthalpy of sublimation of a substance can be determined if its enthalpies of fusion (melting) and vaporization (boiling) are known. The enthalpy of sublimation refers to the energy required to change a substance from the solid phase directly to the gaseous phase, bypassing the liquid phase.

The enthalpy change during sublimation can be calculated by considering the enthalpies of fusion and vaporization. When a substance undergoes sublimation, it first requires energy to melt from the solid phase to the liquid phase (enthalpy of fusion) and then additional energy to vaporize from the liquid phase to the gaseous phase (enthalpy of vaporization). The sum of these two enthalpies represents the overall energy change during sublimation.

Therefore, by adding the enthalpy of fusion and the enthalpy of vaporization, one can determine the molar enthalpy of sublimation for a given substance.

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Answer:

0.064 moles

Explanation:

First, we need to convert the temperature in Kelvin, which can be done by adding 273 to the temperature in Celsius. So the temperature in Kelvin is 294 K. We can now use the Ideal Gas Law, PV = nRT, to solve for the number of moles, n. Rearranging the equation gives us n = PV/RT. Plugging in our values gives us n = (0.553 atm)(1.90 L)/[(0.0821 L·atm/K·mol)(294 K)] = 0.064 mol. Therefore, there are 0.064 moles of krypton gas present in the container.

Answer:

8.822 × 10¹³ g Co

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

9.015 × 10³⁵ atoms Co

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Co - 58.93 g/mol

Step 3: Convert

\(9.015 \cdot 10^{35} \ atoms \ Co(\frac{1 \ mol \ Co}{6.022 \cdot 10^{23} \ atoms \ Co} )(\frac{58.93 \ g \ Co}{1 \ mol \ Co} )\) = 8.82189 × 10¹³ g Co

Step 4: Check

We are given 4 sig figs. Follow sig fig rules and round.

8.82189 × 10¹³ g Co ≈ 8.822 × 10¹³ g Co

Answer:

The halogen bulb lasts longer because the filament lasts longer. It can have twice the life of an incandescent and use the same amount or slightly less (10%) electricity.

Explanation:

The concentration of hydroxide ions ([OH-]) in the given solution is 1.24 M.

Describe the dissociation of a weak base ?

The dissociation of a weak base in an aqueous solution involves the breaking of chemical bonds within the base molecule to release hydroxide ions (OH-) into the solution. Unlike strong bases, which completely dissociate in water, weak bases only partially dissociate, resulting in a dynamic equilibrium between the undissociated base and the hydroxide ions.

To determine the concentration of hydroxide ions ([OH-]) in the given solution, we can first write the chemical equation for the dissociation of the weak base, \(HOC_2H_4NH_2\):

\(HOC_2H_4NH_2 + H_2O\) ⇌ \(OC_2H_4NH_2- + H_3O+\)

Here  for every molecule of \(HOC_2H_4NH_2\) that dissociates, one hydroxide ion (OH-) is formed. Therefore, the concentration of hydroxide ions ([OH-]) will be equal to the concentration of the conjugate base (\(OC_2H_4NH_2-\)).

Given:

[\(HOC_2H_4NH_2\)] = 1.24 M

[\(HOC_2H_4NH_3NO_3\)] = 0.80 M

\(K_w\) = \(1.01*10^{-14}\)

Since,\(HOC_2H_4NH_2\) is a weak base, we can assume that the concentration of the conjugate acid (\(HOC_2H_4NH_3+\)) is remove compared to the concentration of\(HOC_2H_4NH_2\).

To find [\(OC_2H_4NH_2-\)], we have to find  the concentration of \(HOC_2H_4NH_2\) that has dissociated. This can be done using the equation for the dissociation of a weak base and the equilibrium constant (\(K_b\)):

\(K_b\) = [\(OC_2H_4NH_2-\)] * [\(H_3O+\)] / [\(HOC_2H_4NH_2\)]

Given that \(K_b\) is not provided, we can assume that the value of \(K_b\) is  insignificant  compared to \(K_w\), as\(HOC_2H_4NH_2\) is a weak base. Therefore, we can omit the contribution of\(H_3O+\) and let it is equal to 0.

\(K_b\) = [\(OC_2H_4NH_2-\)] × 0 / [\(HOC_2H_4NH_2\)]

Since [\(H_3O+\) is  insignificant , the concentration of [\(OC_2H_4NH_2-\)] will be same to the concentration of \(HOC_2H_4NH_2\) that has dissociated.

[\(OC_2H_4NH_2-\)] = [\(HOC_2H_4NH_2\)] = 1.24 M

Thus, the concentration of hydroxide ions ([OH-]) in the given solution is 1.24 M.

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Answer:

A titanium ion

. Its nucleus is unstable.

Its nucleus is unstable. This characterizes a radioactive atom. Therefore, the correct option is option A.

The smallest parts of common stuff that can be separated without releasing electrically charged particles are called atoms. The atoms are divided into two sections. an electron cloud and an atomic nucleus. Atoms with an unstable nucleus and the potential for radioactive decay are referred to as radioactive atoms.

As only nuclei often experience decay and changes with electron configuration only come from nucleus configuration changes, the term "radioactive atom" is misleading. This isn't a rule, it must be said. As a parent nucleus needs capture any of its orbital electrons, the electron cloud also plays a significant role in the case of electron capture. Its nucleus is unstable. This characterizes a radioactive atom.

Therefore, the correct option is option A.

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Reaction stoichiometry is based on chemical equations and the law of conservation of mass.

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The number of moles of charge contributed to a solution by one mole of dissolved ions is called the Faraday constant (F). It represents the charge of one mole of electrons and is essential in electrochemical calculations involving charge transfer and electrolysis.

In a solution, when one mole of ions dissolves, each ion can carry a certain charge.  For example, if a particular ion carries a charge of +1, then one mole of that ion would contribute +1 Faraday of charge to the solution. The Faraday constant is crucial in various electrochemical calculations, such as determining the amount of charge transferred during an electrochemical reaction or calculating the amount of substance produced or consumed in an electrolysis process.

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Scientists estimate that a single chlorine molecule in the CFC structure can destroy as many as 100,000 ozone molecules. So The correct answer is 100,000.

CFCs are fully halogenated paraffin hydrocarbons that contain only carbon, chlorine, and fluorine atoms. These organic compounds were discovered by scientists in 1928 and were initially used as a refrigerant, solvents, and aerosol propellants.

CFCs are known to be the primary cause of the depletion of the ozone layer. When these chemicals are exposed to ultraviolet light, they break down and release chlorine atoms. The chlorine atoms then react with ozone molecules, resulting in the destruction of the ozone layer.

Ozone is critical to the Earth's atmosphere because it helps protect it from the sun's harmful ultraviolet radiation. Ozone depletion exposes the planet to harmful UV radiation, which has been linked to skin cancer, cataracts, and other health problems.

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Answer:

1)Energy converter is the transformation of one form of energy into another form .It is more specifically that the term energy conversions refers to the process through which energy is changed into forms that are useful to humans .For 100 of years humans have used an array of devices and systems for this purpose.

2) The three energy converters that you or your family use regularly are

3)The three kinds of power plants that produce electricity in Ontario are

4)A power plant is an industrial facility that generates electricity from primary energy most of the power plants use one more generators that convert mechanical energy into electrical energy in order to supply power to the electrical grid for society's electrical needs.

may be this was ur answer for ur question u wanted

Explanation:

Assume if its asking about molecule particle:

1 mol of AgNO3 = 6.022 x 10^23 molecules

0.75 mol of AgNO3 = 0.75 x 6.022 x 10^23

= 4.5165 x 10^23 molecules

Assume if its asking about atom particle:

AgNO3 has 5 elements

0.75 mol of AgNO3 = 0.75( 5 x 6.022 x 10^23)

= 2.2583 x 10^24 atoms

D. all of the above often forms sedimentary rock.

All of the options listed often contribute to the formation of sedimentary rocks. Sedimentary rocks are formed from the accumulation and consolidation of sediments, which are particles or fragments of pre-existing rocks or organic material.

A. Mud and sand: Sedimentary rocks such as shale, mudstone, and sandstone are primarily composed of compacted and cemented mud and sand particles, respectively. Over time, these particles settle and undergo compaction and lithification processes to form sedimentary rocks.

B. Plant and animal remains: Organic matter, including plant and animal remains, can accumulate in certain environments such as swamps, lakes, and marine environments. Over time, these organic materials may undergo partial decomposition and become incorporated into sediment layers. Under specific conditions, this organic material can be preserved and eventually transformed into coal, oil, or natural gas. These substances can be found in sedimentary rocks such as coal beds or oil shale.

C. Chemicals on the ocean floor: Sedimentary rocks can also form from the precipitation of dissolved chemicals in bodies of water, including the ocean. As water evaporates or becomes oversaturated with certain minerals, these minerals can precipitate and settle on the ocean floor. Over time, these accumulated minerals can compact and form sedimentary rocks such as limestone, gypsum, or rock salt.

Therefore, all of the options mentioned (mud and sand, plant and animal remains, and chemicals on the ocean floor) contribute to the formation of sedimentary rocks through different geological processes.

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The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

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2.592e+9. I looked it up on

Answer:

2592000000 Milliseconds

Explanation:

To calculate 30 Days to the corresponding value in Milliseconds, multiply the quantity in Days by 86400000 (conversion factor). In this case we should multiply 30 Days by 86400000 to get the equivalent result in Milliseconds:

30 Days x 86400000 = 2592000000 Milliseconds

I took it from https://whatisconvert.com/30-days-in-milliseconds