If 3.046 g of precipitate was formed, what was the molarity of the ba(no3 )2 (aq)?

Answer:

Explanation:

Hope it helps:)

Step 1 - Finding the molar mass of glycine

The molar mass of glycine can be found by multiplying the molar mass of each element by the number of times it appears in the formula and then summing it all up.

For glycine, we find the molar mass of 75.07 g/mol.

Step 2 - Interpreting the meaning of molar mass

The molar mass gives us the total mass of one mole of that substance. Let's take water as an example: its molar mass is 18 g/mol, which means one mole of water would weight 18 g, two moles 36 g and so on.

For glycine, therefore, one mole weights 75.05 g.

Step 3 - Finding the number of moles

To find the number of moles, we can use a very simple formula relating mass (m), molar mass (M) and number of moles (n):

Therefore, there are 1.77*10^(-2) moles in 1.332 g of glycine.

Ocean currents determine the various directions of wind movement.

Ocean currents are caused by differences in density as well as the temperature of the moving winds across the ocean. In the ocean, warm water is found at the top while cooler water occurs far below.

Warm ocean currents originate near the equator and move towards the poles. The ocean currents control the direction of winds in an area.

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Answer:

A

Explanation:

Answer:

A is the correct answer I believe

In a mixture of noble gases, the gas that will have the greatest partial pressure is Xenon. Mole fraction can be defined as a unit of concentration used in chemistry to measure the amount of one substance in a mixture of substances.

It is equal to the number of moles of a solute divided by the total number of moles of the solution. Therefore, given that in a mixture of noble gases, neon has a mole fraction of 0.5, argon has a mole fraction of 0.3, and xenon has a mole fraction of 0.2. The partial pressure of each gas can be calculated by using Dalton's Law of partial pressures which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each gas in the mixture.

Partial pressure of each gas can be calculated as follows: PNeon = (0.5) x Ptotal PArgon = (0.3) x Ptotal PXenon = (0.2) x Ptotal, where Ptotal is the total pressure of the mixture. Now, we can see that the partial pressure of Xenon will be the greatest because it has the highest mole fraction and will therefore contribute the most to the total pressure.

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Explanation:

93.71/12(mr of carbon) : 6.39/1(mr of hydrogen)

7.81 : 6.39

Divide both by the lowest value

7.81/6.39 : 6.39/6.39

1.22 : 1

1:1

1 carbon and 1 hydrogen

If zinc metal is placed in a solution of 0.10 m hydrochloric acid, a reaction would take place. The half-reactions involved in this reaction are:

Oxidation half-reaction: \(Zn(s) \rightarrow  Zn^{2+}(aq) + 2e^-\)

Reduction half-reaction: \(2H^+(aq) + 2e^- \rightarrow H_2(g)\)

The reaction would take place because zinc metal reacts with hydrochloric acid to form hydrogen gas and zinc chloride.

The overall chemical equation for the reaction is:

\(Zn(s) + 2HCl(aq) \rightarrow ZnCl_2(aq) + H_2(g)\)

Before writing the half-reaction, let us understand What are half-reactions?

A half-reaction is a chemical reaction that exhibits the loss or gain of electrons by a particular species that takes place in an oxidation-reduction reaction. In the same way that a full chemical reaction may be classified as a redox reaction, a half-reaction may also be classified as an oxidation reaction or a reduction reaction.

How do you write half-reactions?

By using the above-mentioned method we get  half-reactions involved in this reaction are:

Oxidation half-reaction: \(Zn(s) \rightarrow  Zn^{2+}(aq) + 2e^-\)

Reduction half-reaction: \(2H^+(aq) + 2e^- \rightarrow H_2(g)\)

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Valence bond theory predicts that iodine will use sp3 hybrid orbitals in ICl2-. This is because ICl2- has a trigonal bipyramidal shape, which requires four hybrid orbitals to form the four bonding pairs of electrons around the central iodine atom.

The remaining two lone pairs of electrons occupy the two remaining p orbitals on iodine. The hybridization of the iodine atom occurs because it allows for the formation of strong covalent bonds between the iodine and chlorine atoms. Hybrid orbitals are formed by the combination of atomic orbitals from the same atom, and they have different shapes and energies than the original atomic orbitals.

Valence Bond Theory predicts that iodine will use sp3 hybrid orbitals in ICl2-. In this molecule, iodine is the central atom and forms two single bonds with the two chlorine atoms. Additionally, there are two lone pairs of electrons on the iodine atom. The formation of four effective pairs (two bonds and two lone pairs) requires the hybridization of one s orbital and three p orbitals, resulting in sp3 hybrid orbitals. The molecule's overall geometry is V-shaped or bent due to the repulsion between the electron pairs.

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Polyprotic Acid : Acids that can mislay, and bases that can gather up, more than one H+ (e.g. diprotic H2A and triprotic H3A acids).

Ionization take place stepwise, and each and every step has its own Ka.

H3PO4 (aq) ⇌ H+ (aq) + H2PO4 - (aq) Ka1 = 7.2 x 10-3

H2PO4 - (aq) ⇌ H+ (aq) + HPO4 2- (aq) Ka2 = 6.3 x 10-8

HPO4 2- (aq) ⇌ H+ (aq) + PO4 3- (aq) Ka3 = 4.2 x 10-13

According to question

To decide the fractional concentrations of one and all species at assorted pH values, first write the Henderson-Hasselbalch equation for each and every dissociation reaction.

Formula of Henderson-Hasselbalch equation is :

pH = pKa + log10 ([A–]/[HA])

pH = pK1+log[H2PO^4-] / [H3PO4]

pH=pK2+log[ HPO^2-] / [H2PO^4-]

pH = pK3+log[PO^3- 4] / [HPO^2- 4]

a. Fraction of H3PO4: pH0 = 0.993; pH2 = 0.58; pH4 = 0.01 ; pH 6 is negligible.

b. Fraction of HPO4 ^2- : pH 0 is negligible and 0.06; pH8 = 0.86; pH10 = 1.0; pH12 = 0.72

c. Fraction of PO3 ^2- : negligible at any pH < 10 ; pH 12 = 0.28

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Hydrogenated compounds, particularly hydrogen gas (H2), are often considered as potential fuels for spark ignition engines.

Hydrogenated compounds are considered the most suitable fuels for spark ignition engines because hydrogen is a highly flammable gas with a low ignition energy and a wide flammability range. When compared to gasoline or diesel, hydrogen has a higher energy content by weight, which makes it an attractive fuel choice.

Due to increasing temperature, the chemical reaction rate also increases as the element moves from a solid to a liquid to a gas.Physical state transitions are dependent on temperature, and the rate of chemical reactions that occur as a result of these state transitions is also influenced by temperature.

At higher temperatures, the chemical reaction rate typically rises as molecules have more kinetic energy and collide with one another more frequently.

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The balanced chemical equation of HClO₃ + HBr → HCl + Br₂ + H₂O is HClO₃ + 6HBr → HCl + 3Br₂ + H₂O.

HClO₃ + HBr → HCl + Br₂ + H₂O

To balance number of O atoms

HClO₃ + HBr → HCl + Br₂ + 3H₂O

To balance number of H atoms

HClO₃ + 6HBr → HCl + Br₂ + 3H₂O

To balance number of Br atoms

HClO₃ + 6HBr → HCl + 3Br₂ + H₂O

This is the balanced equation.

It represents the neutralization reaction between hydrochloric acid (HClO3) and hydrobromic acid (HBr) to form hydrochloric acid (HCl), bromine (Br2) and water (H2O).

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Answer:

the number of moles is 0.279

Explanation:

The calculation of the number of moles of calcium nitrate, is given  below;

As We know that

Number of moles = mass of substance ÷ molecular weight

where

Mass of substance is 45.8g

And, the molecular weight is 164.088

so,

= 45.8 g ÷ 164.088

= 0.279moles

Thus , the number of moles is 0.279

We simply used the above formula so that the accurate value could arrive

Answer:

1)0.5

3)1.7g

4)32g

5)1.12L

Answer:

they keep the plastic bottles and make a Christmas decoration from it to use

Answer:

You can only be able to solve two variables, k and x based on what you input as your question

k= -2x+3

x= (3-k)/2

Explanation:

Answer: Homeostasis on the cellular level is controlled by the cell membrane.

Explanation:

Answer:

C

Explanation:

That's what the first guy said. lol

The pressure inside the cylinder is 1376.68 kPa at 20 degrees Celsius.

To solve this problem, we need to use the Ideal Gas Law:

PV = nRT

where:

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

We are given the volume and mass of methane gas, so we can calculate the number of moles using the molar mass of methane:

MM(CH₄) = 12.01 + 4(1.01) = 16.05 g/mol

n = m/MM = 5540 g / 16.05 g/mol = 345.2 mol

We are also given the temperature, so we can calculate the pressure using the Ideal Gas Law:

P = nRT/V

where R = 8.31 J/mol*K is the gas constant.

First, we need to convert the volume from liters to cubic meters:

V = 43.8 L = 0.0438 \(m^3\)

Next, we need to convert the temperature from Celsius to Kelvin:

T = 20°C + 273.15 = 293.15 K

Now we can solve for pressure:

P = (345.2 mol * 8.31 J/mol*K * 293.15 K) / 0.0438 m^3 = 1,376,680 Pa

Finally, we convert the pressure from Pa to kPa:

P = 1,376,680 Pa / 1000 = 1376.68 kPa

Therefore, the pressure inside the cylinder is 1376.68 kPa at 20 degrees Celsius.

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First, we have to calculate the molecular weights of each molecule:

Then, we have to calculate the number of grams of water. We can calculate them because the process of evaporation lets us know the water amount that was retired:

Then, we're gonna convert the grams of sodium carbonate alone (30.2 g) and the grams of water to moles:

It means that the mole relation is 1:1 approx, as it is the same amount for both. Then, the formula is going to be:

It means that the answer is A.

The new volume of the CO2 bubble is 0.45 mL.

To find the new volume of the CO2 bubble, we can use the Combined Gas Law which relates the initial and final pressures, volumes, and temperatures of a gas. The Combined Gas Law is given by the equation:

P1V1/T1 = P2V2/T2

Where P1 and P2 are the initial and final pressures, V1 and V2 are the initial and final volumes, and T1 and T2 are the initial and final temperatures. We can rearrange this equation to solve for the final volume, V2:

V2 = P1V1T2 / (P2T1)

Now we can plug in the given values and solve for V2. Note that we need to convert the temperatures from Celsius to Kelvin by adding 273 to each temperature:

V2 = (750 mmHg)(0.30 mL)(177˚C + 273) / (725 mmHg)(27˚C + 273)
V2 = (750 mmHg)(0.30 mL)(450 K) / (725 mmHg)(300 K)
V2 = 0.45 mL

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Answer:

Sample Respond: The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell.

good luck

Explanation:

I got 100 mark as brainiest

Red blood cells do not produce CO₂ because they lack mitochondria.

Mitochondria are organelles within cells that are responsible for producing energy through cellular respiration. During cellular respiration, glucose is broken down into ATP (adenosine triphosphate), releasing CO₂ as a byproduct. However, red blood cells do not have mitochondria, and therefore, they are not able to perform cellular respiration.

Instead, red blood cells rely on a unique protein called hemoglobin to transport oxygen and carbon dioxide throughout the body. Hemoglobin binds to oxygen in the lungs and carries it to the body's tissues, while also picking up CO2 from the tissues and carrying it back to the lungs to be exhaled. This process is known as the oxygen-hemoglobin dissociation curve, and it allows for the efficient exchange of gases in the body.

In summary, red blood cells do not produce CO₂ because they lack mitochondria, and instead, they rely on hemoglobin to transport oxygen and CO₂ throughout the body.

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Salts such as \( Na_{2} SO_{4}\) are used in softening of hard water.

Hardness of water is the presence on water of dissolved metallic ions such as calcium and magnesium ions results in the water having additional properties such as taste.

Hardness of water is of significance in the laundry industry as it causes water to lather with difficulty and also produces sc_um.

To remove hardness of water or to soften water, salts such as \( Na_{2} SO_{4}\) are used.

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Answer: because the particles in a solid are more closer to each other than the liquid and gas particles. So the closeness if the particles give a particular shape for the substance.

Please add me to the brainleist please!!!!!!!!

Answer:

option C. Addition of protons to the atomic nucleus.

Explanation:

Elements are fundamentally made up of atoms. Atoms in turn has three sub particles.

These particles are; neutrons, electrons and protons.

The sub particles responsible for the mass of an atoms is basically the protons and neutrons. Going through the options;

The correct option is option C. Addition of protons to the atomic nucleus.

Answer:

A the first 1

Explanation:

The energy and intermolecular forces involved for liquid solid and gas are as follows:

Intermolecular forces are forces of attraction that exists between the molecules of a substance.

The strength of the intermolecular forces and hence, the kinetic energy vary inversely in molecules of solids, liquids and gases.

The energy and intermolecular forces that are involved for liquid solid and gas are explained below:

In conclusion, intermolecular forces decrease with increase in the kinetic energy of molecules.

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The ionization constant from the reaction as shown in the calculation is 5.8.

The term ionization constant refers to the extent to which the acid is ionized in solution. It is calculated from;

Ka = [H3O^+] [Cl]/[HCl]

Thus when we substitute the values;

Ka = 13.3 * 7.4/ 16.9

Ka = 5.8

The ionization constant from the reaction as shown in the calculation is 5.8.

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