Solve for b.
a+b+2c=3

The Ph of a solution that is 0. 01 m in HCl and 0. 02 m in picric acid (ka = 0. 43 is 1.475.

pH is a degree of how acidic/simple water is. The range goes from 0 - 14, with 7 being neutral. pH of much less than 7 imply acidity, whereas a pH of greater than 7 suggests a base. pH is clearly a measure of the relative amount of loose hydrogen and hydroxyl ions within the water.

Since both HCl and picric acid are strong acid, thus [H+] can be determined as:

[H+] = \(\frac{M1V1 +M2V2}{V1 + V2}\)

      = \(\frac{(0.012M * 1L )+(0.0550M * 1L}{(1 +1)L}\)

      = 0.0335 M

Determination of pH of the solution:

pH = -log[H+]

     =  -log[0.0335]

      = 1.475

Hence, the pH of the solution is 1.475.

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Answer:

Given:

Mass of Ca(OH)2 = 65.0 g

Molar mass of Ca(OH)2 = 74.09 g/mol

2 moles of HCl reacts with 1 mole of Ca(OH)2

Solution:

Number of moles of Ca(OH)2 = mass / molar mass = 65.0 g / 74.09 g/mol = 0.877 mol

From the balanced chemical equation, we see that 1 mole of Ca(OH)2 reacts with 2 moles of HCl to form 1 mole of CaCl2 and 2 moles of H2O. Therefore, 0.877 mol of Ca(OH)2 reacts with 2 × 0.877 = 1.754 moles of HCl.

1 mole of Ca(OH)2 produces 1 mole of CaCl2, so 0.877 mol of Ca(OH)2 will produce 0.877 mol of CaCl2.

Therefore, 0.877 moles of CaCl2 will be formed if you start our reaction with 65.0 grams of Ca(OH)2.

Even one gram of a pure element is known to have an enormous number of atoms when working with particles at the atomic (or molecular) level. The mole idea is frequently applied in this situation. Here the number of moles is 0.877.

The mole idea is a useful way to indicate how much of a substance there is. A mole is the amount of a substance that includes precisely 6.022 × 10²³ of the substance's "elementary entities," according to the science of chemistry.

Popularly known as the Avogadro constant, the quantity 6.022 × 10²³ is frequently represented by the letter "NA". Atoms, molecules, monoatomic/polyatomic ions, and other particles (such electrons) are examples of the elementary entities that can be represented in moles.

Number of moles = Given mass / Molar mass

Molar mass of Ca(OH)₂ = 74.093 g / mol

n = 65.0 /  74.093 = 0.877 moles

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Answer:

5m/s

Explanation:

2s ÷ 2 = s

10m ÷ 2 = 5m

5 meters per second or 5m/s

Molarity of solution is 0.95 M.

We know that,

Molarity = number of moles/Volume (in liters)

Number of moles = Given mass /Molar Mass

Molar Mass of KI =166 g/mol

also, We are given with mass of KI = 36.50 g

Number of moles = 36.50 /166

Number of moles = 0.21 moles

Molarity = number of moles/Volume (in liters)

We are given that, Volume of the solution is 221 ml

So,

Molarity = 0.21 × 1000/221

Molarity of KI = 0.95 M

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Answer:

O

2−

:

Explanation:

The atomic number of O=8=number of electrons

Number of electrons in O

2−

are 8+2=10

Electronic configuration will be 1s

2

2s

2

2p

6

Answer:

volume is the amount of space in a certain object

Answer:

y = 2.77 cm

Answer: The third dimension is 2.77 cm

Answer:

D

Explanation:

Oxygen is an element.

sugar is a hydrocarbon derivative.

water is a compound made of hydrogen and oxygen. There are no metals in it at all.

So you are left with Halite. The common name for halite is salt. The chemical formula is NaCl

Answer: D

A quality of a solution known as a colligative property depends on the ratio of the total number of solute particles to the total number of solvent particles in the solution.

Colligative properties are those whose existence in a solution is solely dependent upon the quantity of solute particles present, regardless of kind.

Osmotic pressure, boiling point elevation, freezing point depression, and vapour pressure reduction are some of these colligative qualities. This lesson will discuss how this condensed set of characteristics is crucial to a wide range of technological and natural events.

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Answer:

??????????

Explanation:

Calculation of percent yield requires the theoretical yield to be calculated first. Using that method, the percent yield of the reaction is 44%.

To calculate the percent yield of calcium nitride, we first need to calculate the theoretical yield. To do this, we need the molar mass of both calcium (40 g/mol) and calcium nitride (3 * 40 + 2 * 14) g/mol = 148 g/mol.

3 moles of calcium produce 1 mol of calcium nitride so the proportion we can make will look like this:

120 g of calcium : 148 g of calcium nitride = 56.6 g of calcium : X

X = 148 g of calcium nitride * 56.6 g of calcium / 120 g of calcium

X = 69.8 g of calcium nitride

This is the theoretical yield. Calculating the percent yield works like this - we divide the actual mass by the theoretical yield and then multiply that number (that is always supposed to be between 0 and 1) by 100%:

%yield = 100% * 31.0 g / 69.8 g = 44%

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Answer:

In which organ would you expect the contents of food to be more ground up? (Gizzard)

These external structures are the penis, scrotum, epididymis, and testes. The internal organs of the male reproductive system are called accessory organs. ... To discharge sperm within the female reproductive tract.

The mass of 22.85 g of sodium hydroxide with 20.82 g of hydrogen chloride produces 10.29 g of water and X g of sodium chloride is 33.389 g.

To find the mass of Sodium Chloride, NaCl, we must write the reaction between sodium hydroxide and hydrogen chloride. The balanced chemical equation. NaOH + HCl → NaCl + H₂O

Using the balanced chemical equation and the Law of Conservation of Mass, we can write the equation:

Mass of NaOH = 22.85 g

Mass of HCl = 20.82 g

From the balanced equation:

Number of moles of NaCl formed = Number of moles of HCl used = 0.57041 mol

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mass of NaCl formed = Number of moles of NaCl formed × Molar mass of NaCl

= 0.57041 mol × 58.5 g/mol

= 33.389 g

Therefore, the mass of sodium chloride, NaCl, formed is 33.389 g.

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The group of elements in which Argon placed along with Neon and helium is called Noble gases.

Noble gases can be demonstrated as the 6 elements that belong to group 18 of the modern periodic table. These 6 elements in group 18 are Helium, Neon, Argon, Krypton, Xenon, and Radon.

Under standard conditions of pressure and temperature, all noble gases exist in the gaseous form and exhibit extremely low chemical reactivity therefore they are named inert gas.  All the noble gases possess stable electronic configurations as their valence shell are fully filled. Therefore, the elements are found in monoatomic gases.

The general configuration of the noble gases can be represented as ‘ns²np⁶’ where n is the principal quantum number.

Therefore Argon is a noble gas so they have completely filled electronic configurations, and very little tendency to lose or gain an electron or inert nature.

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The fact that real yield is lower than theoretical yield is not due to the conservation of mass. According to the rule of conservation of mass, no new mass may be formed during a chemical process.

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the question is incomplete. the question you are looking for is

Which of the following is not a reason why actual yield is less than theoretical yield?

A. Impure reactants present

B. Loss of product during purification

C. Conservation of mass

D. Competing side reactions

All the nitrogen atoms in the compound do not have the same hybridization.

We know that the term hybridization would have to do with the mixing of the atomic orbitals and the aim of this mixing is so that we would be able to obtain a combination of atomic orbitals that is suitable for bonding. Hence, we have to look at the bonding of the atoms in the compound and consider the hybridization of each of the atoms.

We know that there are three kinds of nitrogen - nitrogen bonds that e have in the compound and these are;

Nitrogen - Nitrogen singe bonds

Nitrogen - Nitrogen double bonds

Nitrogen - Nitrogen triple bonds

The number of orbitals in the hydrogen atom that is mixed in each case is not the same hence there are all not of the same kind of hybridization in the compound as shown in the image attached.

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Answer:

Hey!

Your answer is definitely A!

Explanation:

Hope this helps!

:>

In an ecosystem,  the following is a consequence of urban heat islands which is  increased precipitation downwind of the city.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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The question can be answered from an integrated rate law that cannot be answered by other forms of the rate law is 1) how long it will take to use x moles per liter [A] 2) what is [A] after y minutes of reaction.

The rate law defines the relation in between rate and the concentration of the reactants. The integrated rate law  describes the  reaction at a specific time.

Thus, The question can be answered from an integrated rate law that cannot be answered by other forms of the rate law is 1) how long it will take to use x moles per liter [A] 2) what is [A] after y minutes of reaction.

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a. The atomic number is the number of protons in an atom. In this case, the atom has 22 protons, so the atomic number is 22.

b. The number of neutrons can be calculated by subtracting the atomic number (number of protons) from the mass number. In this case, the mass number is given as 48, and the atomic number is 22. Therefore, the number of neutrons is 48 - 22 = 26.

c. Nuclear notation represents the composition of an atom in a compact form. For the given atom with 22 protons and 26 neutrons, the nuclear notation is written as follows:

^48Ti (where the superscript represents the mass number and the subscript represents the atomic number)

d. Hyphen notation is another way to represent the composition of an atom. It includes the element symbol, followed by the mass number, separated by a hyphen. For the given atom, the hyphen notation is:

Titanium-48

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The rate of change of the concentration of Na₂C₂O4 is -0.0551 M/s.

To determine the rate of change of the concentration of sodium oxalate (Na₂C₂O4), we can use the rate equation:

Rate = (Δ[Na₂C₂O4]) / (Δt)

where Δ[Na₂C₂O4] represents the change in concentration of Na₂C₂O4 and Δt represents the change in time.

In this case, the initial concentration of Na₂C₂O4 is 1.34 M, and after 19.3 seconds, the concentration is 0.276 M.

Substituting the values into the rate equation, we have:

Rate = (0.276 M - 1.34 M) / (19.3 s - 0 s)

Rate = (-1.064 M) / (19.3 s)

Rate = -0.0551 M/s

Therefore, the rate of change of the concentration of Na₂C₂O4 is -0.0551 M/s.

The negative sign indicates that the concentration of Na₂C₂O4 is decreasing over time, as the reactant is being consumed in the reaction.

It's important to note that the rate of a reaction is influenced by various factors, such as the reaction mechanism, temperature, and presence of catalysts. The rate can be determined experimentally by measuring the change in concentration of a reactant or product over a specific time interval.

The given information allows us to calculate the rate of change for the specific reaction involving Na₂C₂O4. However, without additional information about the reaction, it is not possible to determine the exact nature or stoichiometry of the reaction, as well as any other reactants or products involved.

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Answer:

the correct answer to it will be

2. They are isomers of butanol

as In the first case the the position of the alcoholic group is in the 1st carbon atom of butane and in the second its located at the 2nd carbon atom of butane.

so the compound is same with same chemical formula but since the postion of alcoholic group is different in both they become each other's isomers.

Answer:

Explanation:

Consider the motion of a Hot Wheels car beginning from rest at an elevated position. The Hot Wheels car rolls down a hill and begins its motion across a level surface. Along the level surface, the Hot Wheels car collides with a box and skids to a stop over a given distance. How could work and energy be utilized to analyze the motion of the Hot Wheels car? Would the total mechanical energy of the Hot Wheels car be altered in the process of rolling down the incline or in the process of skidding to a stop? Or would the total mechanical energy of the Hot Wheels car merely be conserved during the entire motion?

Of course the answers to these questions begin by determining whether or not external forces are doing work upon the car. If external forces do work upon the car, the total mechanical energy of the car is not conserved; the initial amount of mechanical energy is not the same as the final amount of mechanical energy. On the other hand, if external forces do not do work upon the car, then the total mechanical energy is conserved; that is, mechanical energy is merely transformed from the form of potential energy to the form of kinetic energy while the total amount of the two forms remains unchanged.

While the Hot Wheels car moves along the incline, external forces do not do work upon it. This assumes that dissipative forces such as air resistance have a negligible affect on the car's motion. This is a reasonable assumption for the low speeds of the car and its streamline characteristics. Since external forces do not do work on the car, the total mechanical energy of the car is conserved while moving along the incline. As the work-energy bar charts in the animation below depict, energy is transformed from potential energy (the stored energy of position) to kinetic energy (the energy of motion). The car gains speed as it loses height. The bar chart also depicts the fact that the total amount of mechanical energy is always the same; when the two forms are added together, the sum is unchanging.

When the Hot Wheels car collides with the box and skids to a stop, external forces do a significant amount of work upon the car. The force of friction acts in the direction opposite the car's motion and thus does negative work upon the car. This negative works contributes to a loss in mechanical energy of the car. In fact, if 0.40 Joules of mechanical energy are lost, then -0.40 Joules of work are done upon the car. As this work is done, the mechanical energy of the car (in the form of kinetic energy) is transformed into non-mechanical forms of energy such as sound and heat.

This idea has historical significance. The ancient Greek philosopher Democritus (born 460 BCE), who held that everything is composed of small particles moving in empty space, is credited with developing the first hypothesis we have about the microscopic universe. He had some concrete proof for this, such the fact that items like a new loaf of bread or a rose may give off a scent even when they are far from the source. Being a materialist, he thought that these odors originated from actual material particles released by the bread or the rose, rather than being purely a type of magic. He reasoned that these particles must float through the air, with some of them maybe landing in your nose where you can smell them immediately. This still makes sense in modern times. But many of us now have quite different perspectives on these "particles."

Thank you,

Eddie

Answer:

20. mol

Explanation:

i got it right on my quiz

The polar ice caps on Mars are examples of **polar glaciers**.

Polar glaciers are large, slow-moving masses of ice that form in high-latitude regions near the poles. On Mars, these ice caps are primarily composed of water ice, with a thin layer of frozen carbon dioxide at the surface. The presence of these glaciers is significant as they provide evidence of the planet's past and present climate conditions. Scientists study the Martian polar ice caps to better understand the history of water on Mars and the potential for life to exist in its subsurface. By analyzing the ice caps, researchers gain valuable insights into the planet's geological processes and its potential to support future human exploration. The polar glaciers on Mars are crucial for expanding our knowledge of the planet and its potential habitability.

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Answer:

If the speed is increasing, the car has positive acceleration. When the car slows down, the speed decreases. The decreasing speed is called negative.

The ground-state electron configuration of O⁻² is 1s² 2s² 2p⁶. This configuration represents the most stable arrangement of the 10 electrons in the O⁻² ion, which includes the 8 electrons from the neutral oxygen atom and the 2 extra electrons from the negative charge.

Let's break it down step-by-step:

1. Identify the element: O is the symbol for oxygen, which has an atomic number of 8. In its neutral state, an oxygen atom has 8 electrons.

2. Add the extra electrons due to the negative charge: Since O⁻² has a charge of -2, it means that there are 2 additional electrons, giving a total of 10 electrons.

3. Determine the electron configuration: The electron configuration is based on the arrangement of electrons in different energy levels and subshells. You can use the periodic table to follow the Aufbau principle, which states that electrons fill the lowest energy orbitals first.

4. Fill the orbitals in order:
  - 1s subshell can hold up to 2 electrons: 1s²
  - 2s subshell can also hold up to 2 electrons: 2s²
  - 2p subshell can hold up to 6 electrons: For O⁻², there are 6 remaining electrons, so the 2p subshell is filled completely: 2p⁶

5. Combine the configurations: The electron configuration for O⁻² is 1s² 2s² 2p⁶.

In conclusion, the ground-state electron configuration of O⁻² is 1s² 2s² 2p⁶. This configuration represents the most stable arrangement of the 10 electrons in the O⁻² ion, which includes the 8 electrons from the neutral oxygen atom and the 2 extra electrons from the negative charge.

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