how can a bent molecular geometry be formed according to vsepr theory? (select all that are correct.) selected answer, tetrahedral electron group geometry with 1 lone pair and 3 bonding groups answer, trigonal planar electron group geometry with 0 lone pairs and 3 bonding groups answer, linear electron group geometry with 1 lone pair and one bonding group answer, tetrahedral electron group geometry with 2 lone pairs and 2 bonding groups answer, trigonal planar electron group geometry with 1 lone pair and 2 bonding groups

tje new preasure is 10.7l

The correct order of decreasing acid strength for the acids lactic acid (LA), oxalic acid (OA), and malic acid (MA) is option B: LA > MA > OA.

The acid strength of an acid is determined by its tendency to donate a proton (H+ ion). The pKa value is a measure of the acidity of an acid, with lower pKa values indicating stronger acids.

In this case, the given pKa values for lactic acid (LA), oxalic acid (OA), and malic acid (MA) are LA = 3.88, OA = 1.23, and MA = 3.40.

Comparing the pKa values, we see that OA has the lowest pKa value (1.23), indicating that it is the strongest acid among the three. LA has a higher pKa value (3.88), making it weaker than OA but stronger than MA. Finally, MA has the highest pKa value (3.40), making it the weakest acid among the three.

Therefore, the correct order of decreasing acid strength is LA > MA > OA, as stated in option B.

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Answer:

James Chadwick

Explanation:

In his first experiment, Rutherford was unable to predict the total mass of nucleus. He noticed that if only electrons and protons are present in the nucleus then by adding their masses, it falls short of the net mass of the atom. so he concluded that there must be another particle and that Particle was later discovered by James Chadwick in 1932.

Answer:

You can separate a mixture of sand, salt and water by decantation and evaporation. Decantation will separate sand from salt and water. Sand remains in the original vessel, whereas salt and water is transfered to new vessel. Evaporation will separate salt from water.

Answer: Mass is 40 kg, weight is 64 N

Explanation: Mass is same everywhere, weight G = mg, it depends on acceleration of gravity

ANSWER

EXPLANATION

Given that

The number of moles lithium bromide is 5.5 moles

Firstly, write a balanced equation for the reaction

Find the number of moles of bromine using stoichiometry ratio

Let x represents the number of bromine

Answer:

example ☝

a pandemic is a situation when people of suffering from the following disease is large in number or the cases are in larger number and it is

The energy transformation is, Electrical to light. The answer is C.

When a battery-powered flashlight is turned on, electrical energy from the battery is transformed into light energy through a process called electroluminescence. Inside the flashlight, a circuit is completed when the switch is turned on, allowing electrical current to flow from the battery through a wire to a light bulb or LED (light-emitting diode). The electrical energy is converted into light energy, which illuminates the area around the flashlight.

The battery's chemical energy is not directly transformed into light, but rather is used to generate electrical energy that is then transformed into light. Hence option C is correct.

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--The complete question is, When a battery-powered flashlight is turned on, what type of energy transformation takes place?

A. Chemical to thermal

B. Electrical to thermal

C. Electrical to light

D. Chemical to light--

Answer:

hola, soy bueno en química en algunas cosas y no tengo correo lo siento

Explanation:

oye hablas español

Answer:

1 not

2 not

3 not

4 balanced

5 not

6 not

7 balanced

Explanation:

the amount of elements must be equal in the reactant and products

Answer:

CH4 + 2O2 --> CO2 + 2H2O

Explanation:

"CO2" can be written as carbon dioxide

Saturated solution means As much solute as possible is dissolved in the solvent.

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The components of the system are antimony trisulfide used for fuel, ammonium phosphate prevents excessive smoking, potassium chlorine is the key to ignition, it makes the fuel burn. At last, another important component of the system is oxygen, which makes ignition possible. Remember that all combustions need oxygen to happen.

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, the given statement is the correct statement.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet. Periodic table is divided into groups and periods. Group number of the periodic table represents the number of electrons in their outermost shell.

Therefore, the given statement is the correct statement.

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To begin with, sucrose is C12H22O11. Additionally, we must determine how many moles of sucrose there are in a pound of sucrose:

The moles of sucrose are 454g, 342.30g, mol1, and 1.33mol.

Is sucrose a good sugar to use?

Brief Summary According to a University of California, Davis study that was published in the Journal of Clinical Endocrinology and Metabolism, sucrose, the more "natural form of sugar," may be just as harmful to your health as HFCS.

Is sugar a healthy food?

Your body only receives sugar when you consume sucrose like soda or candy, and typically too much of it. The threat is present here. You run the risk of major health problems if you consume too much added sugar (fructose or sucrose) in your diet.

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Answer:

3

Explanation:

Answer:

Valence of Fe-3

Valence of O-2

While picking up a buret, an unknown solution left by a previous solution drips onto your hand - Gloves

While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor - Closed-toe shoes

While checking on a stirring solution, the solution splashes up towards your face - Goggles

While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench - Lab coat

Explanation:

So, according to the question. the matches will be:

While picking up a buret, an unknown solution left by a previous solution drips onto your hand - Gloves

While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor - Closed-toe shoes

While checking on a stirring solution, the solution splashes up towards your face - Goggles

While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench - Lab coat

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Answer:

Accurate but not precise

Explanation:

The sample of balloon bags can be described as being accurate but not precise.

Recall that accuracy is the closeness of measurements to their true values while precision is the closeness of repeated measurement.

The balloon bags are accurate because it appears that the number of balloons in each bag is not far from the actual number of balloons that should be in them - exactly 100 in one and a few off in others. By the time the average number of balloons is calculated, it will not be far off from 100, if not exactly 100.

However, the sample bags are described as not being precise because of the inconsistency or lack of closeness in the number of balloons in each of them.

Answer:

strong acid.

Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid.

Answer: a strong acid

Explanation:

Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid.

7.133 is the rate constant increase if the temperature is raised to 37c.

factor=rate(T2)/rate(T1) .

The proportionality constant (k) that links the pace of the reaction to the concentrations of reactants is known as the specific rate constant. For any chemical reaction, the rate law and the particular rate constant must be ascertained through experimentation. Temperature affects the rate constant's value.a chemical reaction in which two or more substances interact and change into new ones, or where one substance transforms into another.

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A reaction that requires water as a reactant is called a hydrolysis reaction. In hydrolysis reactions, water is used to break down a larger molecule into smaller molecules by breaking chemical bonds.

This process requires the addition of a water molecule, which donates a hydrogen ion (H+) to one molecule and a hydroxide ion (OH-) to the other. Hydrolysis reactions are important in many biological processes, such as the breakdown of complex molecules like proteins, carbohydrates, and nucleic acids into their individual building blocks.

Examples of hydrolysis reactions include the breakdown of sucrose (table sugar) into glucose and fructose by the enzyme sucrase, and the breakdown of proteins into their constituent amino acids by the enzyme protease.

Hydrolysis reactions are commonly used in the breakdown of large, complex molecules into smaller, simpler molecules. This is because many large molecules, such as proteins, carbohydrates, and nucleic acids, are too large and complex to be absorbed or utilized by cells. In order to use these molecules, they must be broken down into their individual building blocks.

For example, proteins are composed of long chains of amino acids. To use the amino acids, the protein molecule must be broken down by hydrolysis. The hydrolysis reaction breaks the peptide bonds that hold the amino acids together in the protein chain, producing individual amino acids that can be absorbed and utilized by cells.

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The volume of the gas will occupy at -39.9°C if the pressure remains constant is 6.71dm³.

The volume of a given mass of gas can be calculated using Charles's law equation as follows:

V₁/T₂ = V₂/T₂

Where;

According to this question, 8.97dm³ of hydrogen gas is collected at 38.8°C. The volume can be calculated as follows:

8.97/311.8 = V/233.1

0.029 × 233.1 = V

V = 6.71dm³

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The volume of the hydrogen gas that will occupy -39.9 degrees Celsius if the pressure is kept constant is 6.71 dm³

Volume occupied by a gas at constant pressure can be obtained by using Charles' law equation as illustrated below:

V₁ / T₁ = V₂ / T₂

8.97 / 311.8 = V₂ / 233.1

Cross multiply

311.8 × V₂ = 8.97 × 233.1

311.8 × V₂ = 2090.907

Divide both side by 311.8

V₂ = 2090.907 / 311.8

V₂ = 6.71 dm³

Thus, we can conclude from the above calculation that the volume occupied by the gas is 6.71 dm³

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Answer:

Endoplasmic reticulum

Explanation:

The amount of fluorine formed from 23.4 g of sodium after decomposition at a 1.21:1 sodium fluoride ratio is 18.51 grams

The decomposition reaction of sodium fluoride is an equilibrium reaction. An equilibrium reaction is a reversible reaction in which the products of the reaction can react again to form the reactants. The equilibrium reaction occurs in a closed chamber/container.

The state of equilibrium in an equilibrium system is stable if there is no influence from the outside system. If an influence (action) is applied to the equilibrium, the system will shift toward the new equilibrium.

One factor shifting the balance is concentration. If the concentration of the reactants is added, the equilibrium will shift towards the formation of products.

1.21:1 = 22.4 ÷x (where x is the amount of fluorine produced)

So,
x = 22.4/1.21 = 18.51 gram

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Answer: nowhere from trees

Explanation:

The number of molecules in 3.5 moles of NaCl is 2.107 × 10²⁴ molecules.

The number of molecules in a substance can be calculated by multiplying the number of moles by Avogadro's number as follows:

no of molecules = no of moles × 6.02 × 10²³

According to this question, 3.5 moles of NaCl are given. The number of molecules can be calculated as follows:

no of molecules = 3.5 × 6.02 × 10²³

no of molecules = 2.107 × 10²⁴ molecules

Therefore, 2.107 × 10²⁴ molecules is the number of molecules in the NaCl.

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The question is: What is the boiling point of an aqueous solution of urea at 20% m / m (20g of solute for every 80g of solvent), if the molar mass of urea is 60 g / mol. (Kb = 0.52 ° C / m)

Answer: The boiling point of given aqueous solution of urea is \(2.145^{o}C\).

Explanation:

Given: Mass of solute = 20 g

Mass of solvent = 80 g (1 g = 0.001 kg) = 0.08 kg

\(K_{b} = 0.52^{o}C/m\)

Molar mass of urea = 60 g

Molality is the number of moles of solute present in a kg of solvent.

Moles is the mass of a substance divided by its molar mass. So, moles of urea is calculated as follows.

\(Moles = \frac{mass}{molar mass}\\= \frac{20 g}{60 g/mol}\\= 0.33 mol\)

Now, molality of given solution is as follows.

\(Molality = \frac{moles}{mass(in kg)}\\= \frac{0.33 mol}{0.08 kg}\\= 4.125 m\)

Formula used to calculate the boiling point is as follows.

\(\Delta T_{b} = K_{b}m\\= 0.52^{o}C/m \times 4.125 m\\= 2.145^{o}C\)

Thus, we can conclude the the boiling point of given aqueous solution of urea is \(2.145^{o}C\).

Answer:

The answer is "beryllium-10".

Explanation:

In the given diagram, it displays the atom contains four protons, five neutrons, and two electrons of valence.  

The number of atoms was its number of protons, which is the characteristic of a chemical compound, beryllium (be) is now the atomic component number 4.

The Two electrons of valence imply the atom is 2 and in the  Periodic table group of beryllium; boron (13) and carbon (14) are only of that group.

Beryllium-10 is 6-neutron (different pattern of neutrons, mass number, etc.) and therefore it is an isotope.

This is known as the law of conservation of mass.

conservation of mass