Why is an acid able to produce ions in aqueous solution? assume that the general formula of an acid is given by ha, where a is usually a halogen or oxygen atom.

After losing credibility throughout the jackson case trial. To show that only the body is failing, Gettler underwent a number of cyanide tests.

He identified cyanide poisoning as the cause of death using chemical analyses.

He examined techniques for identifying human body decomposition by  wood alcohol.

He identified cyanide poisoning as the cause of death using chemical analyses.

When arsenic was utilized as a toxin, the Marsh test, a very sensitive method for finding arsenic, is particularly helpful in the field of forensic toxicology. James Marsh, a chemist, created it, and it was first printed in 1836.

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Answer:This formula has three types of atoms - nitrogen (N), hydrogen (H) and oxygen (O). There are a total of 4 atoms in one molecule of SO3.

Answer:

D

Explanation:

I have a crush on the same and I

Number of moles of sodium nitride, NaN₃ needed to produce 3.94 moles of Nitrogen, N₂ is 2.63 moles

Decomposition of sodium nitride is

NaN₃ → Na + N₂

On balancing the given reaction we need to add the necessary coefficients behind the reactants and products

2NaN₃ → 2Na + 3N₂

So, 2 moles of NaN₃  is needed to form = 3 moles of N₂

or 3 moles of N₂ is produced from = 2 moles of NaN₃

1 mole of N₂ is produced from = 2/3 moles of NaN₃

3.94 moles of N₂ of produced from = 3.94 x 2/3 moles of NaN₃

                                                            = 2.63 moles of NaN₃

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Answer:

the option will be no.3

Explanation:

why? because I said so

One type of neon has 10 neutrons, while other types have 11 neutrons and 12 neutrons. The term best defines the different types of neon atoms in nature is known as Isotopes.

Isotopes are atoms of the similar element that have indifferent numbers of neutrons but the equal number of proton and electrons.

The different in the neutrons results the same element with different masses.

Neon is a chemical element. Its symbol is denoted by Ne.

It is called as Nobel gas and the most stable element.

If talking about the properties it is odorless , uncolored, monoatomic, chemically inactive.

Also called as inert gas.

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Answer: isotopes

Explanation:

i took the test

A large class of heterocyclic aromatic organic compounds are descended from oxazole. These are azoles, which have one carbon between the oxygen and the nitrogen.

Although less aromatic than thiazoles, oxazole are nonetheless compounds. Since imidazole’s conjugate acid has a pKa of 7, oxazole’s conjugate acid has a pKa of 0.8.

In this study, the most recent research and discoveries on the full spectrum of oxazole compounds as pharmaceuticals—including those with antimicrobial, antifungal, antiviral, antitubercular, anticancer, anti-inflammatory and analgesic properties—were carefully examined.

Because nitrogen is more basic than oxygen, protonation occurs at the sp2 orbital of nitrogen in oxazole. Oxazole’s oxygen atom reduces the

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The valence electrons for elements is the number of electrons in their outermost shells.

The valence electrons of atoms of elements are the number of electrons in the outermost shell of the atoms.

The innermost shell of every atom can take a maximum of 2 electrons. Thereafter, all other shells are able to take a maximum of 8 electrons. If the last shell of an atom is not completely filled, the number of electrons on the shell is equivalent to the valence electrons.

For every neutral atom, the number of valence electrons is equivalent to the group the atom belongs to on the periodic table.

Thus, group 1 elements have 1 valence electron, group two elements have 2 valence electrons, and so on.

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Answer:

The atmosphere is the layer of gases surrounding a planet or other celestial body.

Explanation:

Hope this helps:)

Answer: The statement that theatoms are made up of protons, neutrons, and electrons is not a part of Dalton's atomic theory. Therefore, option c is correct.

Explanation:

He decided not to dry his glassware throughout the calibration lab.

Instead, he shook leftover water out of his Erlenmeyer flask by the

wrist action.

This is an example of a random error.

Random errors also referred to as human error, depending on how well the experimenter is able to conduct the experiment and interpret the data.

Since the results could be either too high or too low, these errors are random.

Random error frequently determines or limits the experiment's precision.

For instance, the random error would be the reaction time if we were timing the revolution of a turntable that was rotating steadily.

A delay in the beginning (an underestimation of the actual result) or a delay in ending would cause a variation in our reaction time (an overestimation of the actual result).

Random errors differ from systematic errors in both magnitude and direction.

However, the average of a set of measured positions can be calculated, and that average is probably more accurate than the majority of the measurements.

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This is an example of a random error.

The term "random error" describes errors that happen when the conditions under which an experiment is conducted change.

A chance discrepancy between an object's true and observed values is known as a random error.

Chance is the cause of the random error.

When the same weight is placed on an electronic scale multiple times, the readings can vary randomly from one reading to the next. This is an example of a random error.

These discrepancies between the readings and the actual weight are due to random errors in the scale's weight measurements.

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The difference between a solution and a suspension is in the particle sizes involved. A solution is a mixture of ions or molecules (very, very small). Solutions are transparent, meaning that you can see through them. A suspension has bigger particle sizes and so it may look cloudy or murky

By ideal gas approximation, the mass of the Argon gas in container "b" is 488.6 grams.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

Molar mass N₂ = Mr N₂ = 28

Molar mass Ar = Mr Ar = 40

m1 = 69.8 gr

V1 = 4.9 V2

P1 = P2 = P

T1 = T2 = T

Approximate that the gas is ideal, hence the ratio is

P1 . V1 / (n1 . R . T1) = P2 . V2 / (n2 . R . T2)

P . V1 / (m1/MrN₂ . R . T) = P . 4.9V1 / (m2/MrAr . R . T)

Mr N₂ / 69.8 = 4.9 . MrAr / m2

28 / 69.8 = 4.9 . 40 / m2

m2 = 488.6 grams

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Answer:

yea I'm also looking for this question to .

An azeotrope is a composition that has the similar components in the liquid phase as compared to the gas phase . therefore, an azeotropic compositions cannot be separated by distillation.

It is not separated by the distillation or fractional process due to the reason of the when the azeotrope mixture is boiled, the gaseous vapor has the similar proportions of constituents or the components as the unboiled mixture.

It can only be separated by azeotropic distillations. This method is also well known by the AD process.

It is a method to break the azeotropes with the help of various mixture of solvent , or separating agent it forms heterogeneous azeotropes.

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Answer:   amt of time students studied

Explanation:

20 is the slope of the given graph

The density of the pure gold is 19.3g/cc. here in this figure it is given that a graph plotted against mass vs volume. the slope is calculated by

y₂-y₁/x₂-x₁ = 0.4-0.1/0.02-0.005

=20

density of the sample is so from the above given data the calculated average density we get it 19.3 which is the pure golds density.

Gold nuggets are naturally occurring pieces of gold in nature. Streams often concentrate nuggets and fine gold in placer gold. Nuggets are obtained from placer mining, but are also found in gold-bearing veins or deposits of weathered deposits.

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The correct option is (4) Water only.

After equilibrium is established, the vessel contains water only.

Insulation is a material that serves as a barrier between the interior of your home and the considerably variable outside temperature to decrease heat absorption or loss. Heat cannot be added or removed from the vessel since it is insulated; consequently, there is no heat exchange. If hot water and cold water are combined, the final water temperature in the equilibrium vessel will be moderate. Hot water generates the same amount of heat that cold water looses.

By limiting heat movement, insulation ensures optimal housing efficiency. Insulation is mostly used to keep the interior of your home at the proper temperature while consuming less energy.

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The complete question is:

"In an insulated vessel, a quantity of hot water at temperature T1 is mixed with a different quantity of cold water at temperature T2. After equilibrium is established, the vessel contains __________.

1. steam only

2. ice only

3. water and ice

4. water only"

The mass (in mg) of the cube of palladium of edge length 0.055 mm is 0.002 mg

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can obtain the mass of the palladium. Details below

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of palladium = 12.02 × 1.66×10⁻⁷

Mass of palladium = 2.0×10⁻⁶ g

Multiply by 1000 to express in milligram (mg)

Mass of palladium = 2.0×10⁻⁶ × 1000

Mass of palladium = 0.002 mg

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Johnny's percentage error is calculated as= 41%

The quantity of carbon Johnny should have (actual value) = 21.8 g

The quantity of carbon Johnny was able to calculate = 22.7 g

To calculate the percentage error, subtract the actual value from the estimated value. That is,

22.7 - 21.8 g = 0.9 g

This error value obtained is divided by the actual value ( 21.8 g)

0.9 / 21.8 = 0.41

Then multiply by 100%

0.41 × 100.= 41%

Therefore, Johnny's percentage error is calculated as = 41 %

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56 ml of water is displaced on submerging a book having volume of 56 cm³.

If a body is considered which is completely submerged, the volume which it will displace will be equal to volume of the body.If it is partially submerged,volume of fluid displaced will be equal to the volume of the part which is submerged.This is in accordance with the Archimedes' principle.

The Archimedes' principle can be stated as the upward buoyant force which is exerted on a body irrespective whether the body is partially or fully submerged  is equal to the weight of fluid which is displaced by it.

Thus,56 cm³ of water will be displaced on submerging the book into water as the book will be completely submerged.

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1. I believe the answer to the first one is K and K+ are the bigger atom.

2. So I believe Strontium looses 2 electrons

The answer of this question is 123.87 g

Here we have to find the molar mass of unknown solvent

Given,

freezing point of cyclohexane sample =6.20°c

freezing point of resulting solution =4.11°c

Delta Temperature(Δt) = kf × molality for finding molality

Moles = grams / molar mass

Molality = moles / kg solvent

In cyclohexane, the mass of mixed solute = 0.4 × 609

Solute mixed in cyclohexane and mixed in cycloheptene= 0.4^2 × 1000 / 36 π

Del Temperature (Δt)= kf × molality

= 2.0920 × 0.4 × 1004 / 36 × 2.09

M = 9320 / 73.29

= 123.87

Molar mass of  an unknown solvent = 123.87 grams

so, the answer of this problem is 123.87 g

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Answer:

Atoms are made up of a nucleus, protons and electrons

pH is defined as the negative log10 of the hydrogen ion activity, although general chemistry texts commonly express it in terms of the hydronium ion the pH is calculated as 3.23.

In chemistry, the pH scale is used to define the acidity or basicity of an aqueous solution. Historically, pH stood for "potential of hydrogen."

The pH values of acidic solutions are typically lower than those of basic or alkaline solutions.

It is provided that,

{H3O+} = 5.79 X 10^-4M

We know that pH is basically the negative log10 of the hydrogen ion.

this means,

Thus, pH = -log10[H3O+]

Then putting the value of [H3O+]

pH = -log10 (5.39 x 10^-4)

pH = 3.23

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Complete question

PH is defined as the negative log10 of the hydrogen ion activity, aH+, although general chemistry texts commonly express it in terms of the hydronium ion concentration. Thus, pH = −log10 [H3O+], where [H3O+] represents the concentration of H3O+ in units of moles per liter (M). Calculate the pH or [H3O+], as required, for the following solutions. {H3O+} = 5.79 X 10^-4M

The rate constant for the decomposition of acetaldehyde, CH₃CHO, to methane, CH₄, and carbon monoxide, CO, in the gas phase is 1.10 × 10² m⁻¹ s⁻¹ at 703.7 k and 4.90 x 10⁻² m⁻¹ s⁻¹ at 865 k.The activation energy for this decomposition in KJ/mole is 154.303

To determine the activation energy of a reaction (Ea) from two reaction rates (k₁ and k₂) at two different temperatures (T₁ and T₂).

we use the equation -

k₂ = Eₐ x ( 1   -  1  )

k₁     R       T₁    T₂

Where,

R is the gas constant (8.3145 J/mol.K).

We have -

k₁= 1.10 x 10⁻²  m⁻¹ s⁻¹

T₁= 703.7 K

k₂= 4.90 x 10⁻² m⁻¹ s⁻¹  

T₂= 865 K

Putting the values in the equation -

4.90 x 10⁻² m⁻¹ s¹ =          Ea              x (     1        -       1    )

1.10 x 10⁻² m⁻¹ s⁻¹   (8.3145 J/K.mol)      703.7 K      865 K

Ea = (4.90 x 10⁻² m⁻¹ s⁻¹) / (     1       -        1     ) x (8.3145 J/K.mol)

         1.10 x 10⁻² m⁻¹ s⁻¹        703.7 K    851 K

Ea = 154303 J/mol

When divided by 1000,

Ea in KJ/mol = 154.303 KJ/mol

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Answer:

Explanation: Cuttlefish are often called the chameleons of the ocean; this is due to their striking ability to change color for a variety of reasons. ... Cuttlefish have been recognized as changing color to camouflage themselves from, or to warn off predators, and to interact with other cuttlefish.