what is the pka for an acid if the kb of its conjugate base is 2.3 x 10-4? a. 40.2 b. 25.9 c. 10.4 a. 4.3

If excess ammonium sulfate reacts with 20.0g of calcium hydroxide then liters of ammonia are produced at STP 0.081L

Ammonium sulphate is the organic solvent and the primary use of ammonium sulphate is as a fertilizer for alkaline soils

Here given reaction is

(NH₄)₂SO₄ + Ca(OH)₂ → CaSO₄ + NH₃ + H₂O

Here given data is

Calcium hydroxide  = 20.0g

We have to find liters of ammonia are produced at STP =?

20.0g of (NH₄)₂SO₄ STP = ?

Then 20.0g of (NH₄)₂SO₄×1 mol/132g×0.54L/1 mol = 0.081L

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Hi there!

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When a copper coil is placed into a solution of silver nitrate, silver crystals and copper nitrate are generated.

This happens because copper is more reactive than silver and thus displaces silver ions from the solution, resulting in the formation of silver crystals on the surface of the copper coil. At the same time, the copper from the coil dissolves into the solution and reacts with nitrate ions to form copper nitrate.

This chemical reaction is an example of a single displacement reaction, where a more reactive element replaces a less reactive element in a compound. It is also an example of a redox reaction, where there is a transfer of electrons between the copper and silver ions.

The reaction can be represented as: Cu(s) + 2AgNO₃(aq) -> 2Ag(s) + Cu(NO₃)₂(aq).

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When a bath bomb comes in contact with water, the baking soda and citric acid react to make carbon dioxide bubbles. This is an acid–base reaction, where baking soda (also called sodium bicarbonate) is a weak base and citric acid is a weak acid.

Hydrogen bond in H2O is the strongest intermolecular force.

What is intermolecular force?

Intermolecular forces are those that form between a substance's molecules and have the ability to attract and repel one another. All the physical and chemical properties depend on the type of intermolecular force present in the matter.

Dipole-Dipole Interactions

Ion-Dipole Interactions

Ion Induced Dipole Interactions

Dipole Induced Dipole Interaction

Dispersion Forces or London Forces.

These above are the five types of Intermolecular forces-

The order of the Intermolecular forces where

Ion-dipole force is the strongest

Hydrogen bond

Dipole-dipole force

and dispersion force is the weakest.

Hence, the Hydrogen bond present in H2O is the strongest intermolecular force.

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The strongest intermolecular force is the hydrogen bond in water (H2O).

What is intermolecular force?
Intermolecular forces are those that develop between the molecules of a substance and can cause them to attract or repel one another. The type of intermolecular force that is present in the matter determines all of the material's physical and chemical properties.

Interactions between dipoles
Involvements of Ion-Dipoles
Dipole Interactions Induced by Ions
DID Interaction: Dipole Induced DID
London Forces or Dispersion Forces
These five intermolecular force types are listed above.

The intermolecular forces were in this order:
The strongest force is ion-dipole force.
the hydrogen bond
Force between dipoles
the least powerful is the dispersion force.
The strongest intermolecular force is therefore the hydrogen bond in H2O.

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All the three phases solid, liquid and gas can still coexist at the critical point. the conditions at which a liquid and its vapour become the same, or the critical point in physics

The conditions determining the critical point for any substance are the critical temperature, critical pressure, and critical density. The terminal point of the pressure-temperature curve that identifies the circumstances in which a liquid and its vapour can coexist is the liquid-vapor critical point, and it is the most well-known example. An area of space (a thermodynamic system) known as a phase is one in which all of a material's physical attributes are essentially uniform. The macroscopically spontaneous separation of phases is not required. Colloids and emulsions are two examples of immiscible phase pair configurations that don't physically separate.

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Answer:

4.39 moles

Explanation:

According to the balanced chemical equation:

P4 (s) + 6 H2 (g) → 4 PH3 (g)

6 moles of hydrogen gas (H2) react with 1 mole of phosphorus (P4) to produce 4 moles of phosphine gas (PH3). This means that the mole ratio of H2 to PH3 is 6:4 or 3:2.

To find out how many moles of PH3 are produced from 6.59 moles of H2, we can use the mole ratio as a conversion factor:

6.59 moles H2 x (4 moles PH3 / 6 moles H2) = 4.39 moles PH3

Therefore, 6.59 moles of H2 react to produce 4.39 moles of PH3.

Answer:

Atomic mass. 207.2 g.mol -1. Electronegativity according to Pauling. 1.8. Density. 11.34 g.cm-3 at 20°C. Melting point. 327 °C. Boiling point. 1755 °C.

Explanation:

i think

Answer:

1. Motion

2. Position

3. Relation

4. Distance

5. Reference point

6. North

7. South

8. motion

9. Speed

10. Distance

11. Direction

12. displacement

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Laminates are the made by uniting superimposed sheets of different materials.

The laminates are caskets made by the uniting superimposed sheets of the different materials . the sheets of the laminate are made up by the bonding together of the two or the more layers of the materials.  laminates are the decorative products.  the laminates are used in the furniture , for the wall paneling. it is made by high or the low pressure of the laminate. laminates is used in the multilayer of the flooring product. laminates imitate the real wood appearance.

Thus, caskets made of uniting superimposed of layer of the different material are called as the laminates.

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Answer:

3.82 g.

Explanation:

To calculate the mass of sulfuric acid produced from 1.25 g of sulfur, we'll have to balance the chemical equations and use stoichiometry.

Starting with the first reaction:

2S(s) + 3O2(g) → 2SO3(g)

Since 1.25 g of sulfur is reacted, the number of moles of sulfur can be calculated as:

moles = mass / molar mass = 1.25 g / 32 g/mol = 0.03906 mol

Next, using the mole ratio from the balanced chemical equation, we can find the number of moles of sulfur trioxide produced:

2 moles of sulfur produce 2 moles of sulfur trioxide, so:

moles of SO3 = moles of S x (moles of SO3 / moles of S) = 0.03906 mol x (2 mol / 2 mol) = 0.03906 mol

Finally, we move on to the second reaction, the dissolution of sulfur trioxide in water:

SO3(g) + H2O(l) → H2SO4(l)

Using the mole ratio from this balanced equation, we can find the number of moles of sulfuric acid produced:

1 mole of sulfur trioxide reacts with 1 mole of water to produce 1 mole of sulfuric acid, so:

moles of H2SO4 = moles of SO3 x (moles of H2SO4 / moles of SO3) = 0.03906 mol x (1 mol / 1 mol) = 0.03906 mol

The mass of sulfuric acid produced can be calculated using the moles and the molar mass of sulfuric acid:

mass = moles x molar mass = 0.03906 mol x 98 g/mol = 3.82 g

Therefore, if 1.25 g of sulfur is reacted, the mass of sulfuric acid produced is approximately 3.82 g.

Answer:

342g/mol

Explanation:

Molar mass of carbon=12, hydrogen=1 and oxygen=16

therefore C12H22O11=12(12)+22(1)+11(16)

=144+22+176

=342g/mol

Answer:

Sodium is the answer

Explanation:

Answer:

2CO 2NO → 2CO2 N2 : Balanced

6CO2 6H2O → C6H12O6 : Unbalanced

H2CO3 → H2O CO2 : Balanced

2Cu O2 → CuO : Unbalanced

Explanation:

1.) 2CO 2NO → 2CO2 N2

2 Carbon 2

4 Oxygen 4

2 Nitrogen 2

The amount of atoms of each element on each side of the equation are the same therefore the equation is balanced.

2.) 6CO2 6H2O → C6H12O6 O2

6 Carbon 6

12 Oxygen 8

12 Hydrogen 12

The amount of oxygen atoms is different on both sides of the equation therefore the equation is not balanced.

3.) H2CO3 → H2O CO2

2 Hydrogen 2

1 Carbon 1

3 Oxygen 3

The amount of atoms of each element is the same on both sides of the equation therefore the equation is balanced.

2Cu O2 → CuO.

2 Cu 2

2 O 1

The amount of oxygen atoms is different on both sides of the equation therefore the equation is not balanced.

Formal Charge is a concept used to keep track of the distribution of electrons in a molecule or ion. It helps in determining the most probable distribution of electrons in a molecule or ion and helps in predicting the stability of a molecule. In this article, you will learn how to calculate the formal charge of an atom.

To calculate the formal charge of an atom, follow these steps:

Determine the number of valence electrons in an isolated neutral atom of the element.

Assign electrons in the molecule to the atoms in the Lewis structure. Assign one electron to each shared pair and one electron to each unshared electron.

Count the number of electrons assigned to each atom.

Subtract the assigned electrons from the number of valence electrons in the neutral atom to find the formal charge on each atom.

Repeat steps 2 to 4 for all atoms in the molecule to determine the formal charge for each atom.

In a neutral molecule or ion, the total formal charge is equal to zero. The sum of the formal charges for all atoms in a molecule or ion is equal to the overall charge of the molecule or ion.

It's important to note that the formal charge is just a calculated value and does not necessarily reflect the real distribution of electrons in a molecule. However, it is useful for determining the most stable distribution of electrons in a molecule and for predicting chemical reactions.

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The formula for an ionic compound how the Ratio of ion and not a total number.

Ionic compounds are made up of ions which are held by the force of attraction between oppositely charged ions. The most well ionic compounds is prevalent salt (sodium chloride). Molecular components are formed up of discrete molecules that are held together through electron sharing (covalent bonding). When a particle (or group of atoms) acquires or loses electrons, ions form charged particles, forming ionic compounds. A cation is a positive ion, whereas an anion is a negatively charged ion.

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Answer:

Hello?

Explanation:

Answer:

hiiiiii camreaaaaaa. also hows youre dayy

Explanation:

hi :]

a. Change in temperature is -10.0 C b. Unknown substance is likely granite.

a. To calculate the specific heat of the sample, we can use the formula Q = mCΔT, where Q is the energy released, m is the mass of the substance, C is the specific heat, and ΔT is the change in temperature.

First, we need to calculate ΔT: ΔT = final temperature - initial temperature = 80.0°C - 90.0°C = -10.0°C

Next, we plug in the values: 963.6 J = 120.0 g x C x (-10.0°C)

Solving for C, we get C = 0.802 J/g°C.

b. To identify the substance, we can compare the specific heat we calculated (0.802 J/g°C) to the specific heats listed for the different substances. The closest match is granite, which has a specific heat of 0.803 J/g°C. Therefore, the unknown substance is likely granite.

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Answer:

the fourth one I think....m

Explanation:

tfffffdd

The answer is:

Explanation:

A space operations specialist tracks, monitors, and operates spacecraft and satellites. The specialist aligns ground, spacecraft, and satellite communications systems to provide accurate data. (I took the course, I know.)

Your answer is 4 protons 4 electrons and 5 neutrons

5,000 cm3 (cubic centimeters)

The electron-domain geometry of a species is the arrangement of electron domains around the central atom, whereas the molecular geometry is the arrangement of bonded atoms. Two species with the same electron-domain geometry may have different molecular geometries.

In the valence shell electron pair repulsion (VSEPR) theory, the electron-domain geometry refers to the three-dimensional arrangement of electron domains (bonding pairs and lone pairs) around the central atom. The electron-domain geometry is determined by the total number of electron domains around the central atom, regardless of whether they are bonding or non-bonding pairs.

The molecular geometry, on the other hand, refers to the arrangement of the bonded atoms around the central atom. It is determined by the number of bonding pairs and the number of lone pairs on the central atom. The molecular geometry is often used to describe the shape of a molecule.

For example, a species with four electron domains around the central atom has a tetrahedral electron-domain geometry. However, if all four electron domains are bonding pairs, the molecular geometry is also tetrahedral. If one of the electron domains is a lone pair, the molecular geometry is trigonal pyramidal.

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Answer:

I would say A but I'm not sure

When tin metal is placed into a solution of nickel (II) iodide then nothing will occur.

Reactivity series of the metals tells about the increasing or decreasing orders of the reactivity of the metals.

According to the reactivity series, reactivity of nickel metal is more than the tin metal. So, if we add tin metal in the solution of nickel (II) iodide then no reaction occurs. Because the reactivity of tin is less as compare to nickel metal so it is not possible for tin to replace the nickel metal and get dissolve.

Hence, option (C) is correct i.e. nothing.

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Answer:

B. Cl₂ + NaBr → NaCl + Br₂

Explanation:

The single replacement chemical equation that is unbalanced is Cl₂ + NaBr → NaCl + Br₂.

A look at the equation and you will discover that the chlorine on the reactant side is not balanced with the one on the product side. The chlorine at the reactant side has 2 atoms of chlorine but just 1 atom of chlorine in the product side. Therefore, it is unbalanced.   Also, you will discover that the bromine on the reactant side is not balanced with the one at the product side. The bromine on the reactant side has 1 atom of bromine while at the product side, it has 2 atoms. Therefore, it is unbalanced.

For a chemical equation to be balanced, the number of atoms and molecules at the reactant side must be equal to the number of atoms and molecules at the product side.  A single replacement reaction takes place whenever there is a replacement of one element by another element in a compound during a chemical reaction.

The elements are listed in order of increasing the atomic number. Its the number that is the number of protons in the nucleus of an atom.

Answer:

the number of protons define the identity of an element

Explanation:

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