Which of the following explains the VSEPR geometry of BeCl2?It is linear because there are two bonds and no unbonded pairs of electrons.It is tetrahedral because there are four bonds and no unbonded pairs of electrons.It is trigonal planar because there are three bonds and no unbonded pairs of electrons.It is bent because there are two bonds and two unbonded pairs of electrons. What is the molecular geometry of CO2?LinearBentTrigonal planarTetrahedral Which of the following are electrostatic interactions of permanent dipoles in polar molecules?London dispersion forcesIon-dipole forcesDipole-dipole forcesHydrogen bonding Which molecule would have the strongest tendency to form hydrogen bonds with other identical molecules?HClH2HFCH4Which of the following substances would experience the largest dispersion forces between its molecules?Carbon tetrahydride (methane), CH4Carbon tetrabromide, CBr4Carbon tetrachloride, CCl4Carbon tetraiodide, CI4

Answer:

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation.

Answer: Your welcome!

Explanation:

(a) The amount of oxygen gas required to react with 7.98 liters of hydrogen gas at STP in the synthesis of water is 7.98 liters. This is because the balanced chemical equation for the synthesis of water is 2H2 + O2 → 2H2O. Since the moles of hydrogen gas are equal to the moles of oxygen gas, the volume of oxygen gas required would be equal to the volume of hydrogen gas.

(b) The mass of water produced by the reaction is equal to the mass of hydrogen gas (2 x 1.00794 g/mol) plus the mass of oxygen gas (16.00 g/mol) multiplied by the molar ratio of hydrogen gas to oxygen gas (2:1). This gives us a total mass of 18.01588 g.

Answer:

24.088 * 10^23 atoms

Explanation:

The number of atoms in 4 moles of any atom is a constant since 1 mole has 6.022 * 10^23 atoms which is not affected by any property of any atom

So, 4 moles of Na will have 4 * 6.022 * 10*23 atoms

24.088 *10^23 atoms are present in 4 moles of any element

In this question, we have volume and pressure, and the gas law that shows the relationship between these two is the Boyle's Law, which has the following formula:

P1V1 = P2V2

We have:

P1 = 885 mmHg, which is equal to 1.16 atm

V1 = 266 mL

P2 = ?

V2 = 444 mL

Now we add these values into the formula:

1.16 * 266 = 444*P2

P2 = 0.695 atm, this will be the new pressure, letter D

The jumbled word "gzeysktqix" can be unscrambled to form the word "skyzigtext."

Here are possible words that can be made from this jumbled word:

Sky: Referring to the atmosphere above the Earth.

Zig: Describing a series of sharp turns or angles.

Text: Referring to written or printed words.

Six: The number following five and preceding seven.

It seems that the jumbled word has provided a mix of letters that can be rearranged to form these words. This exercise is likely intended to enhance the student's vocabulary skills, spelling ability, and problem-solving skills. By unscrambling the letters, the student is encouraged to explore different word possibilities and apply their knowledge of language. It also promotes critical thinking and creativity as they find valid words from the given set of letters.

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To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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Answer:

63.518

Explanation:

The following data were obtained from the question:

Mass of Isotope A = 62.9 amu

Abundance of isotope A (A%) = 69.1%

Mass of isotope B = 64.9 amu

Abundance of isotope B (B%) = 30.9%

Atomic weight of the element =..?

The atomic weight of the element can be obtained as follow:

Atomic weight = [(Mass of A x A%)/100] + [(Mass of B x B%) /100]

Atomic weight = [(62.9 x 69.1)/100] + [(64.9 x 30.9)/100]

Atomic weight = 43.4639 + 20.0541

Atomic weight = 63.518

Therefore, the atomic weight of the element is 63.518.

The combined Gas Law equation is represented by B) P1V1 / T1 = P2V2 / T2.

The combined gas law is the law that combines Charles’s law, Gay-Lussac’s law, and Boyle’s law.

Combined gas law can be mathematically expressed as

k = PV/T

Where,

P = pressure

T = temperature in kelvin

V = volume

K  = constant (units of energy divided by temperature)

When two substances are compared in two different conditions, the law can be stated as,

P1V1/T1 = P2V2/T2

Where,

P1 = initial pressure

V1 = initial volume

T1 = initial temperature

P2 = final pressure

V2= final volume

T2 = final temperature

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Answer:

Water doesn't have ions that are needed to pass the electricity so in order to increase the no of ions we poor acid into the water. Just increasing the no ions will increase the electricity flow faster

Answer:  There are three main types of forests: tropical rainforests, deciduous forests, and coniferous forests. Tropical rainforests are found near the equator (the center of Earth), where they are warm all year round.

Explanation:

Ecosystems are defined as a geographical region where biotic factors like animals, plants and microorganisms live together and interact with the abiotic factors.

The three forest ecosystems are temperate, boreal and tropical.

Tropical forest ecosystems have high precipitation and temperature also a high humidity rate. The plant has a twelve-month growing period and the forests are found near the equator regions.

Temperate is found in between the boreal and the tropical forests, it has a high level of rainfall and humid conditions and is covered with the deciduous type of trees.

Boreal or the taiga forest ecosystems are located in the subarctic regions with low temperatures and have long winters. They are covered majorly by the scale-leaved evergreen and the needle leaves cones.

All three forest ecosystems have great species diversity, the tropical and the temperate forest have dense vegetation and the temperate and boreal have evergreen forests.

Therefore, three forest ecosystems are temperate, boreal and tropical.

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Answer:

62.02 g/mol

62.03 g/mol

Explanation:

62.03 g/mol

The molar mass of H2CO3 is 62.02 g/mol

The molar mass of the compound is the sum of molar mass of indivitual atom multiple by number of that atom.

Calculation of molar mass of H2CO3 ,

Molar mass of H2CO3 =  Molar mass of H*2 +  Molar mass of C + Molar mass of O*3

Molar mass of H2CO3 = 1.0079*2 + 12.010 + 15.999*3

Molar mass of H2CO3 = 2.0158 + 12.010 + 47.997

Molar mass of H2CO3 = 62.02 g/mol

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The balanced chemical equation for the decomposition of aspirin (acetylsalicylic acid) is:

\(2C_{9}H_{8}O_{4} (aspirin) → 2C_{7}H_{6}O_{3} (salicylic acid) + 2CO_{2} (Carbon dioxide) + H_{2}O (water)\)

In this reaction, the aspirin molecule breaks down into salicylic acid, carbon dioxide, and water. The reaction is typically catalyzed by heat or exposure to acidic or basic conditions.

Aspirin, or acetylsalicylic acid, contains ester functional groups that can undergo hydrolysis. Under suitable conditions, the ester bond in aspirin is cleaved, leading to the formation of salicylic acid, which is the primary decomposition product. Additionally, carbon dioxide and water are released as byproducts of the reaction.

The balanced equation shows that for every two molecules of aspirin, two molecules of salicylic acid, two molecules of carbon dioxide, and one molecule of water are formed. Understanding the decomposition of aspirin is important in pharmaceutical and chemical industries to ensure the stability and shelf-life of the compound, as well as to study its breakdown products and potential side reactions.

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Answer:

answer is b

Explanation:

The molarity of the solution after mixing 19g of sugar in 100ml of distilled water is 5.56×10⁻⁴/ml

The molarity is characterized as the complete number of moles of solute present in a given arrangement for each liter. It is otherwise called "molar focus" and is perused as "molar." It is addressed by the letter "M," and its unit is mol/L. The molarity of an answer is supposed to be one molar in the event that one mole of the solute disintegrates in one liter of the arrangement. The molarity of an answer relies upon the volume of the arrangement yet not the volume of the dissolvable. As the volume of the arrangements changes with the adjustment of states of being of the framework, the molarity of the given arrangement relies upon the actual properties of the framework, like pressure and temperature, in contrast to mass.

We know that molarity is given by the formula

M=number of moles of solute/volume of solution in ml

Here solute is sugar.For finding the moles of solute we need to find the molecular weight of sugar which is calculated as

Sugar(C₁₂H₂₂O₁₁)=12ˣ12 + 22ˣ1 + 16ˣ11=342g

Therefore,number of moles=19/342

Now,we have volume of solution in ml=100

Therefore,molarity=(19/342) /100

=>Molarity=19/34200

=>Molarity=5.56×10⁻⁴/ml

Hence,molarity is 5.56×10⁻⁴/ml

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The mass by volume percentage is an important method which is used to calculate the concentration of a solution. This type of concentration is usually expressed as a percentage. Here the amount of solute is

The mass by volume percentage of a solution is defined as the ratio of the mass of solute that is present in a solution relative to the volume of the solution as a whole.

The equation used to calculate the mass by volume percentage is:

m / v = Mass of solute / Volume (mL) of solution × 100 %

m / v = 50 g / 75 mL + 25 mL = 0.5  × 100 % = 50%

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Answer:

2 g of H₂

Explanation:

We have:

7 g of N₂

16 g of NO₂

16 g of O₂

2 g of H₂

Let's count to verify the moles:

7 g . 1 mol / 28g = 0.25 moles of nitrogen

16 g . 1 mol / 46g = 0.348 moles of nitrogen dioxide

16 g . 1mol /32g = 0.5 moles

2 g . 1 mol / 2g = 1 mol

The biggest number of moles is in the hydrogen.

1 mol of anything contains NA particles

1 mol of oxygen contains 6.02×10²³ molecules, the maximun number

Answer:

Cation and anion.

Cation is a positive ion.

Anion is negative ion.

E.g.: NaCl, CaF2, KBr

A chemist determines that a substance is composed of 30.4% nitrogen by mass and 69.6% oxygen by mass. The molar mass of the compound is 230.5 g/mol, the molecular formula is NO₂.

We must compute the empirical formula in order to ascertain the compound's chemical composition.

If we have 100 grams of the compound.

This suggests we have:

30.4 g of nitrogen

69.6 g of oxygen

Now, we have to convert the mass of each element to moles.

The molar mass of nitrogen (N) = 14.01 g/mol

the molar mass of oxygen (O)  =  16.00 g/mol.

Number of moles of nitrogen (N):

2.17 mol

Number of moles of oxygen (O):

4.35 mol

The simplest whole-number ratio between the moles of nitrogen and oxygen must now be determined. To calculate the ratio, we divide both numbers by the smaller value.

Moles N / moles O = 2.17 mol / 2.17 mol = 1.00

Moles O / moles O = 4.35 mol / 2.17 mol = 2.00

The ratio is approximately N₁O₂.

We divide the subscripts by their greatest common divisor to obtain the simplest ratio, since we are looking for the empirical formula. The empirical formula is NO₂ since the greatest common divisor in this situation is 1.

The molecular formula of the compound is NO₂.

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The term that the scientist would use in this case is partial pressure. Option D

The pressure that one particular gas component within a mixture of gases exerts is referred to as partial pressure. It is the pressure that the gas would experience at the same temperature if it were the only thing in the entire volume.

When researching gas mixtures, such as in gas laws, gas phase equilibria, and gas collecting methods, partial pressures are extremely crucial for the gas.

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Answer:

true

Explanation:

Answer:

Explanation:

It is odd to describe the presence of a given substance and its dissolved species as a competition but the state is called an equilibrium in solubility.

Answer:

Solubility

Explanation:

Mark that

The amount of given substance and dissolved species is constant at equilibrium .

As per le ch atler's principle

If you change the concentration it would affect the Equilibrium n

Answer:

50/36 = 25/18

Explanation:

Solution at attachment box

Molality = mole of dissolvable (this question glucose) / kg of water

Answer:

Molality = 1.38 mol/Kg

Explanation:

Given data:

Molality of solution = ?

Mass of C₆H₁₂O₆ = 150.0 g

Mass of water = 600.0 g (600 g ×1 kg/1000 g= 0.6 Kg)

Solution:

Number of moles of C₆H₁₂O₆:

Number of moles = mass/molar mass

Number of moles = 150.0 g/180.16 g/mol

Number of moles = 0.83 mol

Molality:

Molality = moles of solute / kg of solvent

Molality =  0.83 mol /0.6 Kg

Molality = 1.38 mol/Kg

The pressure inside the tire, converted to pascals, is approximately 8,555 N/m^2, or 8.56 × 10^3 Pa, using the appropriate number of significant figures.

To convert the pressure from pounds per square inch (psi) to pascals (Pa), we need to use the given conversion factors:

1 pound = 4.45 newtons

1 inch^2 = 6.45 centimeters^2 = (6.45/100)^2 square meters

First, let's convert psi to newtons per square inch (N/in^2):

28.0 psi * 4.45 N = 124.6 N/in^2

Now, let's convert newtons per square inch to pascals:

124.6 N/in^2 * ((6.45/100)^2) m^2 = 8,555.4125 N/m^2 (approximately)

To express the answer to the correct number of significant figures, we need to determine the number of significant figures in the given pressure value. Since the pressure is given as "28.0," it implies that there are three significant figures. Therefore, the pressure inside the tire, converted to pascals, is approximately 8,555 N/m^2, or 8.56 × 10^3 Pa, using the appropriate number of significant figures.

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The equilibrium constant, K, for the given reaction at 450 K is 4.33.

The equilibrium constant, K, for the given reaction is given by the Expression:

K = [Nocl]^2 / ([NO]^2 [Cl2])

Where [NO], [Cl2], and [Nocl] are the equilibrium partial pressures of the Respective gases.

At equilibrium, the partial pressures of NO, Cl2, and Nocl are 0.075 atm, 0.191 atm, and 0.35 atm, respectively.

Substituting these values in the expression for K, we get:

K = (0.35)^2 / ((0.075)^2 (0.191))

K = 4.33

Therefore, the equilibrium constant, K, for the given reaction at 450 K is 4.33.

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Answer:

The mass of the metal is 160 grams.

Explanation:

The volume of the metal can be found by multiplying its dimensions:

Volume = 4 cm x 10 cm x 2 cm = 80 cm³

The density of the metal is given as 2 g/cm³. Therefore, the mass of the metal can be found using the formula:

mass = density x volume

Substituting the values we get:

mass = 2 g/cm³ x 80 cm³ = 160 g

Therefore, the mass of the metal is 160 grams.

Answer:

Ammonia can be prepared using Haber process based on the following equation:

3H2 + N2 <.........> 2NH3Explanation:

The reaction above talks about the production of ammonia NH₃

To solve this question, we'll begin by writing the balanced equation for the reaction between H₂ and N₂. This is illustrated below:

3H₂ + N₂ —> 2NH₃

From the balanced equation above,

3 moles of H₂ reacted to produce 2 moles of NH₃.

Therefore, 26 moles of H₂ will react to produce = (26 × 2)/3 = 17.3 moles of NH₃.

Thus, 17.3 moles of NH₃ were obtained from the reaction.

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Answer:

The word 'pinniped' means 'fin foot', as the four legs of seals, sea-lions and walrus have developed into flippers to better suit their life in the water. They are not fish! Even though a great part of their life is spent in the sea, pinnipeds are warm blooded air-breathing mammals known as marine mammals.

Explanation:

Sea lions (left) are brown, bark loudly, "walk" on land using their large flippers and have visible ear flaps. Seals have small flippers, wriggle on their bellies on land, and lack visible ear flaps. ... Both seals and sea lions, together with the walrus, are pinnipeds, which means "fin footed" in Latin.

To solve this we must be knowing each and every concept related to sea lions. Therefore, due to above given reason,  seals and sea lions are not considered fish.

Sea lions are curious creatures with sleek bodies that are playful as well as acrobatic in behavior. The species that can be found in aquariums and zoos the most frequently are California sea lions, who enthrall visitors with their antics. This captivating animal possesses a variety of extraordinary traits that are just amazing. Learn more about this sea lion by reading on.

Scaled fish have a cold blooded constitution. Their bodies are streamlined, and they breathe underwater. Fur covers seals and sea lions. They are warm blooded and breath air.

Therefore, due to above given reason,  seals and sea lions are not considered fish.

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