The ka for acetic acid (hc2h3o2) is 1.80 x 10-5. determine the ph of a 0.0500mol/l acetic acid solution.

Answer: Where are the answers?

Explanation:

Answer:

Option A

Explanation:

Leguminous plants like pulses etc. have root nodules comprising of rhizobacterium which live in a symbiotic relationship with the roots of the plant and in turn fix the nitrogen in the soil in the roots of the leguminous plants.

Hence, option A is correct

Answer:

Ions and charged particles

Explanation:

An ionic compound consists of a ions and a charged particles

The boiling point of an element is largely determined by its intermolecular forces, which in turn are affected by factors such as atomic size, electronegativity, and the number of electrons.

In the case of strontium, which has a boiling point of 1382°C, the element with the most similar boiling point is likely to be one that is in the same group as it on the periodic table. This is because elements in the same group tend to have similar electronic configurations and atomic radii. Therefore, barium, which is in the same group as strontium, is likely to have a boiling point that is most similar. On the other hand, elements in different groups will likely have very different boiling points. For example, fluorine, which is in a different group than strontium, will likely have a boiling point that is least similar to that of strontium.

On the other hand, a non-metal element from a different group, like fluorine (F) in Group 17 and Period 2, would have a boiling point least similar to strontium due to the significant difference in their chemical properties and atomic structures.

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Answer:

that is the structure

Explanation:

that is the structure

The chemical structure of 2-(2-Bromophenyl)butane can be written as follows:

\(CH_3(CH_2)_3CH(PhBr)CH_3\)

The arrangement of atoms and chemical bonds of a molecule or compound is called its chemical structure. They provide a visual representation of a molecule's three-dimensional form, which is important for understanding its characteristics and behavior in chemical processes.

For example, the chemical structure of 2-(2-Bromophenyl)butane can be written as follows:

\(CH_3(CH_2)_3CH(PhBr)CH_3\)

Where,

Therefore, the chemical structure of 2-(2-Bromophenyl)butane can be written as follows:

\(CH_3(CH_2)_3CH(PhBr)CH_3\)

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Answer:

D

Explanation:

NO is the molecule nitrogen monoxide while No is the atomic symbol for the element nobelium

From the given data of chemical compounds, 5.32 grams of W and 2.66 grams of X are needed.

The following calculation must be done to determine how much W and X is needed to make the necessary amount of Z because it takes 8 grammes of a chemical compound called Z to make it, and Z is made from compounds W, X, and Y in the ratios of 2: 1: 3 and Y is itself made from W and X, and to make 6 grams of Y requires 4 grams of W and 2 grammes of X.

8/6 = 1.33

The resulting ratio is 2.66 : 2.33  :3:99.

3.99 = w

3.99 x 4/6 = 2.66

1.33 grams of X are equal to 2.66 grams of W.

2.66 x 2 = 5.32

1.33 x 2 = 2.66

5.32 grams of W and 2.66 grams of X are therefore needed.

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According to ideal gas law ;

PV = nRT where, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.

If Volume of system is reduced to half = V/2

then; P = 2(nRT/V), Pressure will be doubled to reestablish the equilibrium.

What is Chemical equilibrium?

Chemical equilibrium, condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs. A reversible chemical reaction is one in which the products, as soon as they are formed, react to produce the original reactants.

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Answer: It is a molecular compound. (2) It contains a metal. (3) It can conduct electricity as a solid.

The energy of the ion with a spectroscopic transition wavelength of 274 nm is 2.83 electron volts

The energy of an ion can be calculated from the spectroscopic transition wavelength using the equation: E = (hc)/ (λ), Where E is the energy of the ion in electron volts (eV), h is Planck's constant (6.626 x 10⁻³⁴ J.s), c is the speed of light (2.998 x 10⁸ m/s), and λ is the wavelength of the spectroscopic transition in meters. Converting the wavelength from nanometers (nm) to meters: λ = 274 nm x 10⁻⁹ m/nm = 2.74 x 10⁻⁷m. Substituting the values into the equation, we get: E = (6.626 x 10⁻³⁴ J.s)(2.998 x 10⁸ m/s) / (2.74 x 10⁻⁷ m)

E = 4.51 x 10⁻¹⁹ J

E = 4.51 x 10⁻¹⁹ J / (1.602 x 10⁻¹⁹ J/eV) = 2.83 eV

So, the energy of the ion with a spectroscopic transition wavelength of 274 nm is 2.83 electron volts

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The name of the compound by using the IUPAC nomenclature of organic compounds is 1 -octene. The correct option is the last option - 1-octene.

From the question, we are to determine the name of the given molecule.

To name the compound, we will follow the IUPAC rules.

Some of IUPAC rules are

The given compound has 8 carbons and a double bond. The root name of the compound is octane.

By IUPAC rules, the compound is an Octene.

Since the double bond is between carbon-1 and carbon-2. The compound becomes 1-octene.

Hence, the name of the compound by using the IUPAC nomenclature of organic compounds is 1 -octene. The correct option is the last option - 1-octene.

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The diagram for the compound is attached below.

The heat energy required to melt 13.00 kg of ice at 273 K is 4368000 J

Q = mL

Where

With the above formula, we can determine the heat required to melt the ice. detail below:

The heat energy needed to melt the ice can be obtained as illustrated below:

Q = mL

Q = 13 × 3.36×10⁵

Q = 4368000 J

Thus, the heat energy required to melt 13.00 kg of ice at 273 K is 4368000 J

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The answer is (e) 70 milliliters.

Let's assume that x milliliters of the 35% saline solution were used.

The total amount of saline in the solution can be calculated as follows:

Saline in 35% solution = 0.35 * x

Saline in 75% solution = 0.75 * 10 (since 10 milliliters of the 75% solution were used)

The total amount of saline in the resulting 40% solution can be calculated as:

Saline in 40% solution = 0.40 * (x + 10)

Since the saline is being mixed, the total saline in the resulting solution is equal to the sum of the saline in the individual solutions:

0.35 * x + 0.75 * 10 = 0.40 * (x + 10)

Simplifying the equation:

0.35x + 7.5 = 0.40x + 4

Subtracting 0.35x and 4 from both sides:

7.5 - 4 = 0.40x - 0.35x

3.5 = 0.05x

Dividing both sides by 0.05:

x = 3.5 / 0.05

x = 70

Therefore, 70 milliliters of the 35% saline solution were used. The answer is (e) 70 milliliters.

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The property that must be identified to consider whether a toxic compound will easily move through soil and enter the groundwater is: D. Soil sorption coefficient (Kd).

Soil sorption coefficient (Kd) is the measurement to predict the amount of chemical substance absorbed into the soil per amount of water. This measurement is also called Freundlich solid-water distribution coefficient. To calculate the Kd value, we could use the equation as follows:

Kd = concentration on the solids (mg/kg) / concentration in the pore water (mg/L)

“The question seems incomplete. The complete query is as follows:

When considering whether a toxic compound will easily move through soil and enter the groundwater—which of the following properties must be identified?

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Answer:

I think the answer is Prokaryote and Eukaryote

Explanation:

Answer:

The Five-Column Chart is a useful tool for summarizing your investigation. In the case of your investigation involving solids, the chart would include columns for Properties, Examples, Uses, Interactions and Special Characteristics. In the Properties column, you would list the physical and chemical properties of solids, such as shape, texture, melting point, boiling point and solubility. The Examples column would list examples of solids, such as metals, plastics and rocks. The Uses column would list the various uses of solids, such as in construction, engineering and medicine. The Interactions column would list how solids interact with each other, such as through adhesion, cohesion and friction. Finally, the Special Characteristics column would list any special characteristics of solids, such as their electrical conductivity or magnetic properties.

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The oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.

In the reaction represented by the Cr₂O₇²⁻ ion, the element chromium (Cr) is reduced. Its oxidation number changes from +6 to +3.

In the Cr₂O₇²⁻  ion, each oxygen (O) atom has an oxidation number of -2. The overall charge of the ion is 2-, which means the total oxidation numbers of all the atoms should add up to -2. Since there are seven oxygen atoms, their total oxidation number is (-2) × 7 = -14.

To determine the oxidation number of chromium (Cr), we can set up the following equation;

2(Cr) + 7(-2) = -2

Simplifying the equation, we have;

2Cr - 14 = -2

By solving for Cr, we get;

2Cr = 12

Cr = 6

Initially, the oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.

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Answer:

false

Explanation:

it happens in light-independent reactions

Neutralizing each mole of \($\mathrm{H}_3 \mathrm{PO}_4$\) will therefore, take three moles of NaOH.

Put the titration formula to use. The formula is molarity (M) of the acid x volume (V) of the acid = molarity (M) of the base x volume (V) of the base if the mole ratio between the titrant and analyte is 1:1. The number of moles of solute per litre of solution is how a solution's concentration, or molarity, is stated.

1M = 1 mol L

\($34.55 \mathrm{~mL}=\frac{34.55}{1000}=0.03455 \mathrm{~L}$\)

n = cV = 0.03455 × 1.500 = 0.05183 mol.

\($\mathrm{H}_3 \mathrm{PO}_4$\) exists inorganic. All three of its H atoms required to neutralized. It takes one \($\mathrm{OH}^{-}$\)to neutralize each H from \($\mathrm{H}_3 \mathrm{PO}_4$\). Each formula unit of NaOH will provide one \($\mathrm{OH}^{-}$\)ion. Neutralizing each mole of \($\mathrm{H}_3 \mathrm{PO}_4$\) will therefore, take three moles of NaOH

\($n(\mathrm{NaOH})=3 n\left(\mathrm{H}_3 \mathrm{PO}_4\right)=3 \times 0.05183=0.1555 \mathrm{~mol} \text {. }$$\)

\($V=\frac{n}{c}=\frac{0.1555}{1.420}=0.1095 \mathrm{~L}=0.1095 \times 10^3 \mathrm{~mL}=109.5 \mathrm{~mL} \text {. }$$\)

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The properties of cohesion, adhesion, capillary action, and polarity are important properties of water. These properties enable water to travel up the plant stem against gravity, leading to the plant being able to absorb water through its roots.

Water is a vital component of plant life. It is a source of nutrients and helps plants to carry out photosynthesis. Cohesion, adhesion, capillary action, and polarity are unique properties of water that are important in this process.Cohesion refers to the ability of water molecules to stick together. This is important because when water molecules stick together, they create a surface tension that helps water to maintain its shape.

This surface tension enables water to be drawn up the plant stem.Adhesion refers to the ability of water molecules to stick to other surfaces. This is important because when water sticks to the sides of the plant stem, it helps to hold the water in place, allowing the plant to absorb water through its roots.Capillary action refers to the ability of water to move through small spaces.

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Within any kind of chemical reaction the purpose of mechanism is to make the reaction happen and various factor affect the reaction.

In any kind of chemical reaction there are two substituents required, firstly is the molecule that is said to participate in any kind of reaction which is aid to be the reactant and secondly is the result generated from the reaction which is said to be the product.

The mechanism may involve various kinds of factors which include the formation of any kind of bond and also the bond-breakage. It also include various kinds of steps so as to generate the end-result.

The main role of the lone-pairs in any kind of reaction is that they are assigned the role of serving any kind of reaction in two kinds. Firstly is the electron(e) acceptor and secondly is the electron(e) donor. The main role of the term stereochemistry is the following order of various kinds of atoms that play an essential role in chemical reactions.

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The complete question is

What do you understand by the mechanism that takes part in any chemical reaction. Also explain about the role of lone pair and stereochemistry in the chemical reaction?

Answer:

The answer is A. Unlike other maps, topographic maps indicate man-made and natural landforms.

Explanation: Took the test and got 100% Edg. 2020

Answer:

A)Unlike other maps, topographic maps indicate man-made and natural landforms.

Explanation:

Answer:

it boils a liquid to create condomsation

Explanation:

Answer:

Distillation refers to the selective boiling and subsequent condensation of a component in a liquid mixture. It is a separation technique that can be used to either increase the concentration of a particular component in the mixture or to obtain (almost) pure components from the mixture. The process of distillation exploits the difference in the boiling points of the components in the liquid mixture by forcing one of them into a gaseous state.

Explanation:

Answer:

All elements are pure substances, Each element is made up of the same type of atom.

Answer:

Hope this helps! :)

Explanation:

The ground state electron configuration is the arrangement of electrons around the nucleus of an atom with lower energy levels. Electrons occupying the orbitals of varying energy levels naturally fall towards the lowest energy state or ground state. For example, the ground state electron configuration of oxygen is 1s2 2s2 2p4

(But to simplify it, A short hand notation to indicate the electron orbitals which are filled in a particular atom.)

The diagonal rule basically says that electrons fill orbitals in order of increasing "quantum number sum" (n + ℓ). When two orbitals share the same "quantum number sum", they will be filled in order of increasing n.

Answer:

if its less Dense than water it will float, if it's more Dense, than water it  will sink. if an object weighs more than the same amount of water then it will sink but if it weighs less it will float

Explanation:

Answer:

Letter D

Explanation: