Indicate the oxidation number of carbon and sulfur the in following compounds.Procedurea. CO b. CO2 c. Na2CO3d. Na2C2O4 e. CH4 f. H2COg. SO2 h. SO3 i. Na2SO4j. Na2SO3 k. Na2S2O3 l. Na2S4O6m. SCl2 n. Na2S2 o. SOCl2

Answer:

\(p[H+] = 10.042\)

Explanation:

As we know that

\(pKw = pH + pOH\)......eq (1)

we will calculate the pH of OH- and then we will calculate the pH of H+

So p[OH-] \(= - log [1.10 * 10^{-4}]\)

Solving the right side of the equation, we get

p[OH-]

\(= - [-3.958]\\= 3.958\)

Now we know that

\(pKw = 14.0\)

Substituting the value of pOH in the above equation, we get -

\(14.0 = p[H+] + 3.958\\p[H+] = 14 - 3.958\\p[H+] = 10.042\)

The formal charge on the oxygen in formaldehyde, CH2O, is zero and the hybridization of the oxygen atom is sp2.

The formal charge of an atom can be calculated by subtracting the number of lone pair electrons and half the number of bonding electrons from the total valence electrons of the atom. In formaldehyde, the oxygen atom is bonded to two hydrogen atoms and a carbon atom. The oxygen has four valence electrons, and it forms two single bonds with hydrogen and one double bond with carbon. Therefore, the formal charge on the oxygen is calculated as follows:
Formal charge = valence electrons - lone pair electrons - (1/2 x bonding electrons)
Formal charge on oxygen = 4 - 2 - (1/2 x 4) = 0
This means that the oxygen in formaldehyde has a formal charge of zero, indicating that it has the appropriate number of electrons for a neutral atom.
The hybridization of an atom is determined by the number of electron groups (both bonding and lone pairs) around it. In formaldehyde, the oxygen atom is surrounded by three electron groups - two single bonds and one double bond. This means that the oxygen must hybridize its orbitals to form three sp2 hybrid orbitals that are arranged in a trigonal planar geometry around the atom.
Therefore, the hybridization of the oxygen atom in formaldehyde is sp2.

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C₂H₆, compound has a C-H bond with the lowest bond dissociation energy, hence option A is correct.

Toluene has the lowest bond dissociation energy because it undergoes hyper conjugation with the C-H protons.

The energy needed to break a bond and create two atomic or molecular fragments, each containing one of the original shared pair of electrons, is known as the bond dissociation energy.

As a result, an extremely stable bond has a high bond dissociation energy, meaning additional energy is required to break the binding.

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Answer: The answer is the one with the letter P in the red circle.

Explanation:

Answer:

this

Explanation:

because

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

where

m is the mass

v is the velocity

From the question

m = 1.6 kg

v = 25 m/s

We have

\(k = \frac{1}{2} \times 1.6 \times {25}^{2} \\ = 0.8 \times 625 \\ = 500\)

We have the final answer as

Hope this helps you

The correct way to set up the relationship between milligrams and grams is 1mg-10-³g. option D is correct.

The milligrams and grams are is eual to the 1g = 1,000mg. 1,000 milligrams (mg) in 1 gram (g).

The conversion of  your gram figure to milligrams multiply your figure by 1000.  1mg is 1/1000g. There are 1,000 milligrams in 1 gram.

Therefore, The correct way to set up the relationship between milligrams and grams is 1mg-10-³g. option D is correct.

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The concentration of Ca(OH)2 in the solution is approximately 1.33 x 10^(-6) M.

To find the concentration of Ca(OH)2 in a solution with a pH of 8.57, we need to use the concept of pOH, which is the negative logarithm of the hydroxide ion concentration ([OH-]). The pOH can be calculated by subtracting the pH from 14, which gives us 14 - 8.57 = 5.43.

Since Ca(OH)2 produces two OH- ions for every molecule of Ca(OH)2 that dissolves, the concentration of OH- ions will be twice the concentration of Ca(OH)2. Thus, we have [OH-] = 2x, where x represents the concentration of Ca(OH)2.

Taking the antilogarithm of the pOH, we find that [OH-] = 10^(-pOH) = 10^(-5.43).

Since [OH-] = 2x, we can write 2x = 10^(-5.43) and solve for x.

x = (10^(-5.43))/2 ≈ 1.33 x 10^(-6) M

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Distillation is a method of separating mixtures, which is based on difference in the volatility of a boiling liquid mixture. The property of a component which separates the 2-propanol from the water is a boiling point.

In the distillation method, the two components are separated based on their different boiling points. For example, in the mixture of 2-propanol and water, propanol has less boiling point than the water, which is 82.5°C. So when we apply heat to the mixture, 2-propanol is separated in the form of vapour and it is immediately cooled by the action of cold water in a condenser. The another examples of distillation method is purification of alcohol, separation of gasoline from crude oil etc.

Therefore, the property of the components that makes it possible to use distillation to separate the 2-propanol from water is boiling point.

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The salt that is NOT derived from a strong acid and a strong soluble base is: Ba(NO₃)₂

The substance that is not an acidic salt is: CH₃NH₃NO₃

An acidic salt is a type of salt that produces an acidic compound or element after it has been dissolved in a solvent. An acidic salt in the list of options provided is CH₃NH₃NO₃.

This compound is formed from methylamine, a weak acid, and nitric acid, a strong acid. Also, barium nitrite is formed from a strong base and weak acid.

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The number of H atoms in 3(NH₄)₂CrO₄ = 24

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula  

Subscripts in the chemical formula indicate the number of atoms

The compound of 3(NH₄)₂CrO₄ ( 3 molecules of (NH₄)₂CrO₄ ) :

Number of H :

\(\tt 4\times 2(subscript)\times 3(coefficient,number~of~molecules)=24~atoms\)

The number of Hydrogen (H) atoms in the compound, 3(NH₄)₂CrO₄ is 1.44×10²⁵ atoms

From Avogadro's hypothesis,

1 mole of H = 6.02×10²³ atoms

Therefore,

24 moles of H = 24 × 6.02×10²³

24 moles of H = 1.44×10²⁵ atoms

Thus, the number of atoms of H in 3(NH₄)₂CrO₄ is 1.44×10²⁵ atoms

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Answer:

The answer is 80!

Explanation:

A prism is a three dimensional solid object in which the two ends are identical. It is the combination of the flat faces, identical bases and equal cross sections. The volume of the prism is 819 cm³.

A prism is a polyhedron with two parallel congruent faces called the bases that are polygons. The volume of a three dimensional solid is the amount of space it occupies. The volume is measured in cubic units. The volume can be denoted in m³, cm³, ft³, etc.

The volume of a prism is the area of the base times the height. The equation used to calculate the volume is:

Volume = Base area × Height

Here the rectangle has 9cm length and 7cm width. Then the area is:

Area = 9 × 7 = 63 cm²

The height of prism = 13 cm

Then the volume is:

V = 63 × 13 = 819 cm³

Thus the volume of the prism is 819 cm³.

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Your question is incomplete most probably your full question was

What is volume of the rectangular prism with length 9cm, width 7cm and height  13 cm?

The height of a ramp does not directly determine the strength of the frictional force between a book and an object.

The strength of the frictional force between a book and an object is not directly influenced by the height of a ramp. The nature of the surfaces in contact, the force forcing the surfaces together (normal force), and the coefficient of friction are some of the variables that affect the frictional force between two surfaces.

The coefficient of friction between the book and the object plays a major role in determining the strength of the frictional force.

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Answer:

The prairies are temperate grasslands, and savannas are tropical grasslands (Option D). It is the most important difference between both biomes.

Explanation: brainiest maybe?

Answer:

Hey i don't know if you still need the answer but this is what i think it is:

Explanation:

B is correct answer

15 j

(Sorry if its wrong)

Since the bell weighs 190 N and is 45 m high, the bell’s potential energy is 8550 J

To answer the question, we need to know what potential energy is.

This is energy due to position. It is given by PE = mgh where

Also, W = mg = weight of object.

So, PE = Wh

Now, given that the bells weight 190 N and is 45 m high,

So, PE = Wh

= 190 N × 45 m

= 8550 Nm

= 8550 J

So, the bell’s potential energy is 8550 J

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Answer:

See explanation

Explanation:

Average  velocity = distance traveled/time

distance traveled = 7.25 miles

Time taken = 20 minutes or 0.33 hours

Average velocity = 7.25 miles/0.33 hours = 21.97 miles per hour

This average velocity does not reflect how fast Juan's mother drove at every point in the journey.

At every point in the journey, Juan's mother had an instantaneous velocity given by the velocity at that given instant divided by time taken up to that point.

The instantaneous velocity gives the velocity at particular instants throughout the journey while the average velocity reflects the average velocity of the entire journey.

3D view of H3O+

The stronger line means that the Hydrogen is closer to us in a 3D view, meanwhile the line with traces, or you cal also see as a weaker line, it means that the Hydrogen is farther from us in a 3D view

Lewis Structure of H3O+

Answer:

the two equations that can be used to eliminate a1 are (2) and (3).

Explanation:

The equations are:

(2) -m1g * cosθ + T = m1 * a1

(3) a1 = a2

By substituting equation (3) into equation (2), we can eliminate a1:

-m1g * cosθ + T = m1 * a2

Answer:

C)peer review

Explanation:

Peer review involves the evaluation of scientific research work by other professionals working in the same field. It is one of the stages a manuscript passes through before it is published in any reputable journal.

Peer review is important because it ensures that only high quality and original scientific research is published for the consumption of other professionals in the same field.

Answer:the parts of the body which is nearest to  the ground ie thier back will show discoloration

Explanation:

If the body remains at a position for long hours, the parts of the body which is nearest to  the ground can develop a skin discoloration as a result of pooling of blood in the tissues and this is called livor mortis, which tends to be permanent from 8Hours upwards.

The age of the moon rock is roughly 11.8 billion years.

The age of the moon rock can be estimated using the half-life of the radioactive substance. The half-life of a radioactive substance is the amount of time it takes for half of the original amount of the substance to decay. In this case, the half-life is 1.5 billion years.

To determine the age of the moon rock, we can use the concept of exponential decay. Exponential decay is a mathematical term that describes the rate at which a substance decays over time. Since the rock contains 1/8 of the original amount of the radioactive substance, we can use this information to estimate the age of the rock.

Assuming that the original amount of the radioactive substance has decayed exponentially over time, we can determine the age of the rock using the following equation:

\(Age =\frac{ (Half-life *ln(\frac{1}{8})) }{ ln(2)}\)

Plugging in the given information, we get:

\(Age = \frac{(1.5\ billion\ years\ * \ ln(\frac{1}{8})) }{ ln(2)}\)

Solving for Age, we get:

Age = 11.8 billion years

Therefore, the moon rock is estimated to be 11.8 billion years old.

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Answer:

yes the ones u chose are correct.

Explanation:

Explanation:

When an iron object is left in damp air for a considerable time, it gets covered with a reddish- brown flaky substance called rust. This is called rusting of iron. The process of rusting is represented as follows: Rusting of iron is a chemical change because a new substance iron oxide is formed.

Answer:

It is a chemical change.

Explanation:

• A chemical change is a change that cannot be reversed.

The addition of water vapor to the system will not directly affect the amount of N₂ produced in the given reaction.

The balanced equation shows that the production of N₂ is determined by the stoichiometry of the reactants, namely 4 moles of ammonia (NH₃) reacting with 3 moles of oxygen (O₂) to produce 2 moles of nitrogen gas (N₂). The presence of water vapor (H₂O) does not participate in the reaction as a reactant or a product. Therefore, the amount of N₂ formed will remain the same regardless of the presence or addition of water vapor.

However, it is worth noting that the addition of water vapor may indirectly affect the reaction by altering the conditions or equilibrium of the system. For example, the presence of water vapor could influence the reaction kinetics, the temperature, or the concentration of reactants. These factors could potentially impact the rate of the reaction or the position of the equilibrium, which might have an indirect effect on the final amount of N₂ produced. But without specific information about the conditions and the influence of water vapor, it cannot be determined how the amount of N₂ will be affected in this particular scenario.

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Learn more about distillation and condensation process.

What is distillation?

Distillation is a process in which a liquid is transformed into a vapor and then condensed back into a liquid state. The simplest illustration of it is when distilled water drops are left on a chilly surface after being deposited as steam from a kettle.

What is condensation?

The process by which matter transitions from its initial gaseous form into its liquid state is known as condensation. For instance, condensation happens when airborne water vapor (in its gaseous form) makes the transition to liquid water upon coming into contact with a cooler surface.

Given density of isoamyl acetate = 0.88g/ml

volume of isoamyl acetate = 75 ml

MW of  isoamyl acetate = 130.2g/ml

Therefore, no.of moles =mass/ molar mass

and mass = density*volume

Therefore, no.of moles = density*volume/molar mass

= 0.88g/ml*75 ml/130.2g/ml

=0.55 moles

similarly for methyl benzoate

no. of  methyl benzoate = 1.09g/ml*115ml/136.2gml

=0.92 moles.

Boiling point of isoamyl acetate = 142°c (vaporize first)

Boiling point of methyl benzoate= 199.6°c (moves down)

mole fraction of isoamyl acetate = 0.51/0.57+0.92

=0.357

mole fraction of the methyl benzoate = 0.643

%of isoamyl acetate= 35.7%

%of methyl benzoate= 64.3%

mole ratio= 35.7:64.3

Initial boiling point 166°c

composition of vapor in equilibrium with liquid  75: 25 (using theoretical plate1)

                                                                                ↓     ↓

                                                                              IA      MB

Re vaporization at 145°c

composition of vapor, at 145°c

95:5 ( using theoretical plate 2)

↓     ↓

IA MB

Condensate⇒ low density mixture

% composition of Condensate= 95%

(IA) using two theoretical plates

Therefore, Condensate is 95%

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A) The value of Ka for the weak acid C₆H₅NH₃⁺ is approximately 5.03 × 10⁻¹¹.

b) The value of Kb for the weak base ClO⁻ is approximately 1.86 × 10⁻⁵.

A) For the weak acid C₆H₅NH₃⁺, the equilibrium expression for Ka is given by: Ka = [C₆H₅NH₂][H₃O⁺] / [C₆H₅NH₃⁺].

[C₆H₅NH₃⁺] = 0.233 M

[C₆H₅NH₂] = 2.3 × 10⁻³ M

[H₃O⁺] = 2.3 × 10⁻³ M

Plugging these values into the Ka expression:

Ka = (2.3 × 10⁻³ M)(2.3 × 10⁻³ M) / (0.233 M)

Ka ≈ 5.03 × 10⁻¹¹

b) For the weak base ClO⁻, the equilibrium expression for Kb is given by: Kb = [OH⁻][HClO] / [ClO⁻].

[OH⁻] = 4.0 × 10⁻⁴ M

[HClO] = 2.38 × 10⁻⁵ M

[ClO⁻] = 0.273 M

Plugging these values into the Kb expression:

Kb = (4.0 × 10⁻⁴ M)(2.38 × 10⁻⁵ M) / (0.273 M)

Kb ≈ 1.86 × 10⁻⁵

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Answer:

B.) 1s²2s²2p⁶3s¹

Explanation:

Sodium is the first element in the third period of the periodic table. Because it lies within the "s" block, the highest energy orbital should be an "s" orbital. Because sodium lies within the 3rd period, the highest energy orbital should be "3s". Because sodium is the first in the row, there is only one electron that can occupy the highest energy orbital. Therefore, the electron configuration of sodium is 1s²2s²2p⁶3s¹. No elements within the third period occupy a "d" orbital.

E/Z isomerism possibly happens on the off chance that the gatherings attached to every carbon particle in the C=C bond are unique. Because of the confined revolution about the planar C=C twofold bond,

The place of the gatherings attached to the carbons in the twofold bond can't be exchanged. Along these lines, various isomers exist.

E-Z documentation can be utilized to portray the design of a twofold bond with at least two substituents. To do such, each substituent is relegated fundamentally important utilizing the Cahn-Ingold-Prelog rules. On the off chance that the two higher need substituents are on the same side of the twofold bond, the arrangement of the bond is Z.

In the letter E, the level strokes are on a similar side; in the E isomer, the higher need bunches are on inverse sides. In the letter Z, the level strokes are on inverse sides; in the Z isomer, the gatherings are on a similar side.

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Dissolving and dispersing are two different approaches to waste disposal. Dissolving is the method of separating and breaking down solid waste materials into smaller particles by using a solvent such as water.

Dispersing involves distributing and breaking up the waste into smaller pieces in order to make it more manageable to dispose of.

Dissolving means breaking them down; dispersing means spreading them out is the right choice.In conclusion, dissolving and dispersing waste materials have different methods. Dissolving refers to the separation and breaking down of solid waste materials into smaller particles by utilizing a solvent such as water.

Dispersing, on the other hand, involves distributing and breaking up waste into smaller pieces to make it more manageable to dispose of.

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