Which is the balanced equation for V2O5 + CaS → CaO + V2S5?

V2O5 + CaS → CaO + V2S5
5V2O5 + 5CaS → 10CaO + 5V2S5
3V2O5 + 3CaS → 3CaO + 3V2S5
V2O5 + 5CaS → 5CaO + V2S5

Answer:

hydrogen nitrate + sodium hydrochlorate- sodium nitrate+ water + co2 (acid base reaction)

silver nitrate + calcium chloride - silver chloride+ calcium nitrate ( double displacement reaction)

hydrogen + nitrogen - ammonia gas ( simple contact reaction)

hydrogen peroxide - water + oxygen ( single displacement reaction)

Hope it helps :)

Pentanal (C4H9CHO) is the answer

dolphin and whales use echolocation

The volume of a gas is changed from 691 mL to 852 mL, the temperature will change from 315 °C to 452°C.

Charles law states that the volume of a given gas is directly proportional to the temperature given that the pressure remains constant.

The charles law equation is as follows:

V1/T1 = V2/T2

V1/588 = 852/725

588 × 852 = 725V1

500,976 = 725V1

V1 = 500976/725

V1 = 691mL

Therefore, the volume of a gas is changed from 691 mL to 852 mL, the temperature will change from 315 °C to 452°C.

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Answer:

yes

Explanation:

Sodium carbonate, also known as washing soda or soda ash, has a wide range of applications. Sodium carbonate can be naturally occurring or synthetically produced through various methods, including the Solvay process, which is the most common method of industrial production.

Sodium carbonate, also known as washing soda or soda ash, has many uses, including:

1) Cleaning agent: Sodium carbonate is an effective cleaning agent due to its alkaline nature. It is used in laundry detergents and household cleaners to remove stains and grease from clothes and surfaces.

2) Industrial applications: Sodium carbonate is used in a variety of industrial applications. It is used in the production of glass, pulp and paper, and soaps and detergents. It is also used as a water softener and pH regulator in chemical processes.

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Answer:

is this for science or another class?

Answer:

Water is peace. They include sedimentation, pollution, climate change, deforestation, landscape changes, and urban growth. ... Each type of change to a landscape will have its own specific impact, usually directly on natural ecosystems and directly or indirectly on water resources.

Explanation:

Answer:

\(189kJ\)

Explanation:

Hello!

In this case, since one mole of ethanol release 8,842 J per 1 mole of ethanol, we can write:

\(\frac{8,842J}{1molC_2H_6H}\)

Thus, since we need the energy released by 982.6 g of ethanol, we compute the moles in such mass of fuel:

\(n=982.6g\frac{1mol}{46.08g} =21.3mol\)

Therefore, the result is:

\(\frac{8,842J}{1mol}*21.3mol=188,545J\)

Which in kJ is:

\(189kJ\)

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Answer:On a sloped parking lot

Explanation:

Answer:

true

Explanation:

The conjugate base of CO3-2 is hydrogen carbonate.

A conjugate base can be defined as a base that can be derived from another base by the reason of it loosing or gaining an electron.

Conjugate base are very similar because they both posses the same elements.

In conclusion, The conjugate base of CO3-2 is hydrogen carbonate.

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Carbon dioxide (CO2) enters plants through stomata in the leaves, where it diffuses through intercellular spaces over small distances until it reaches the mesophyll cells.

what is meant by mesophyll cells?

Mesophyll conductance is an essential part of photosynthesis, and during the past two decades, its significance for an accurate definition of photosynthetic constraints has grown. A complex process including both biochemical and anatomical components, carbon dioxide diffusion over the leaf mesophyll. The main factors affecting it are cell wall thickness, chloroplast distribution, and aquaporins. In the past ten years, mesophyll conductance has drawn more attention as a fundamental factor in photosynthesis under water stress and as a potential target for increasing plant productivity and water usage effectiveness. The focus of this chapter will be on the mesophyll conductance's response to water stress and recovery, including drought adaptation, and how important it is in limiting photosynthesis in water-limited circumstances.

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Answer:   Bonds form when atoms share or transfer valence electrons. Valence electrons are the electrons in the outer energy level of an atom that may be involved in chemical interactions. Valence electrons are the basis of all chemical bonds.

Explanation: Due to atoms and science ;)

Answer:

throught transferring or sharing an electron

Explanation:

a p e x :)))

The statement that is true is that It is endothermic and DH equals +91.8 kJ.

We can see that in this case that the heat of the reaction which we cam also call the enthalpy of the reaction is positive. Let us know that when we have a positive enthalpy what we have is an endothermic reaction.

Endothermic reactions are typically observed as a decrease in temperature, as energy is absorbed from the surroundings to fuel the reaction. Examples of endothermic reactions include the melting of ice.

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Missing parts;

Given the balanced equation representing a reaction at 101.3 kPa and 298 K:

N2(g) + 3H2(g) => 2NH3(g) + 91.8 kJ

Which statement is true about this reaction?

(1) It is exothermic and DH equals -91.8 kJ.

(2) It is exothermic and DH equals +91.8 kJ.

(3) It is endothermic and DH equals -91.8 kJ.

(4) It is endothermic and DH equals +91.8 kJ.

Answer:

The Nucelous helps prevent bad cells in

Explanation:

Answer:

D.) NaOH

Explanation:

Sodium always forms the cation, Na⁺.

Hydroxide is always written as OH⁻.

The compound should have an overall charge of 0 (be neutral). As you can see, the charges perfectly balance out (+1 + (-1) = 0). Therefore, there only needs to be one atom of each ion. The ionic compound is thus NaOH.

Answer:

Given the reaction:

Fe+H

2

O→Fe

3

O

4

+H

2

If the number of electrons lost or gained during the changes is x. Then, the value of x is 8.

The balanced chemical equation is as follows:

3Fe+4H

2

O→Fe

3

O

4

+4H

2

The oxidation number of hydrogen changes from +1 (in water) to 0 (in hydrogen molecule).

Thus, net change in the oxidation number of hydrogen per atom is 1.

There are 8 H atoms.

Hence, the total change in the oxidation number of 8 hydrogen atoms is 8.

Hence, 8 electrons are involved in the redox reaction.

Hence, x=8.

Answer:

1000ml=1l

35ml. = ?

Explanation:

35×1/1000

0.035litres

It depends on the powdery  substances that is been dissolved hence it can be  insoluble or partially soluble in water.

To make any granules into useful cleaners, it must first be dissolved in water. But not all powdered raw materials easily dissolve into water, therefore it could take some time to combine them together to get a solution. For a powdered substance, builders must be used for the majority of the cleaning.

Therefore, Powders, which are tiny solids, are frequently only weakly or completely soluble in water. Powder insoluble levels in water rely on a variety of controllable elements, including temperature, humidity, and particle size.

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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The balanced reaction equation of the reaction is; 2H2O + O2 → 2H2O2

This is a chemical equation that represents the reaction between water (H2O) and oxygen (O2) to form hydrogen peroxide (H2O2). The coefficients in front of each substance indicate the relative number of molecules involved in the reaction.

Recall that we can balance the reaction equation  by ensuring that the atoms of the elements on both sides of the reaction equation are the same as we have above.

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The heat of solution is the total enthalpy change when a solution is formed from the separated solute and solvent is true statement.

It is true that the overall enthalpy change that occurs when a solution is created from a separated solute and solvent is known as the heat of solution. The change in enthalpy that occurs when 1 mol of solute (component 1) dissolves in a solvent is known as the enthalpy of solution (or heat of solution) (component 2).

The amount of heat that can be emitted or absorbed when a solution dissolves is simply referred to as the enthalpy change of the solution. At a constant temperature, the enthalpy of a solution is typically represented as kJ/mol.

Three essential steps are necessary for the enthalpy of a solution:

1. Solute separation: This is the breakdown of the solute. The solute is no longer held together by any intramolecular forces in this situation.

2. Solvent separation: This occurs when all intramolecular forces holding the solvent together are broken as a result of the breakdown of the solvent.

3. Mixing: To create a solution, the solute and the solvent are combined in this instance.

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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:

The right answer is "16.67 mL".

Explanation:

Given:

Molarity of NaOH,

\(M_1=6 \ M\)

\(M_2=0.2 \ M\)

Volume of NaOH,

\(V_1=V \ mL\)

\(V_2=500 \ mL\)

As we know, the equation,

⇒ \(M_1V_1=M_2V_2\)

On putting the values, we get

⇒ \(6\times V=0.2\times 500\)

⇒ \(6\times V=100\)

⇒        \(V=\frac{100}{6}\)

⇒            \(=16.67 \ mL\)      

1. The rms speed of O₂ molecules at 427 K is 576.9 m/s

2. The rms speed of He atoms at 427 K is 1631.7 m/s

The rms speed of the various elements can be obtained as follow:

1. For O₂ molecules

rms speed = √(3RT / μ)

rms speed of O₂ molecules = √(3 × 8.314 × 427 / 0.032)

rms speed of O₂ molecules = 576.9 m/s

2. For He atoms

rms speed = √(3RT / μ)

rms speed of He atoms = √(3 × 8.314 × 427 / 0.004)

rms speed of He atoms = 1631.7 m/s

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Homogeneous mixture are Brass, Vodka and Sugar; while Heterogeneous mixture are Gravel and Potato salad.

A homogeneous mixture is a type of mixture where the composition is uniform and the same throughout. Examples of homogeneous mixtures include saltwater, air, and vinegar. These mixtures have a consistent appearance and properties, and their individual components cannot be easily separated.

A heterogeneous mixture is a mixture where the composition is not uniform and can vary in different parts of the mixture. Examples of heterogeneous mixtures include salad, fruit punch, and soil. These mixtures have varying appearance and properties, and their individual components can be easily separated.

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Answer:108.06 grams

Explanation: the first step is to use unit conversions. Multiply the given number of moles by the molar mass of water which is 15.99 grams of oxygen plus 2.02 grams for two hydrogen that will turn it into grams and that will give you your total number of grams.

The ranking of boiling point is based on the molecular weight and intermolecular forces between molecules.

2 central carbons, each with CH3 bonded to them. A central C has H bonded left, above, behind to the right, and in front to the right. A carbon chain with 5 central carbons, with CH3 bonded to the first, second, and last carbons in the chain. 2 central carbons with CH3 bonded to the outside, and CH3 bonded to the leftmost inside carbon.

In this case, all compounds are hydrocarbons, meaning they are non-polar molecules and exhibit van der Waals forces. However, the length of the carbon chain and the arrangement of atoms in the molecule affect the magnitude of these forces.

The first compound has only two carbons and exhibits weak intermolecular forces, so it has the lowest boiling point. The second compound has three carbons and a more complex arrangement of atoms, resulting in slightly stronger van der Waals forces and a higher boiling point.

The third compound has a longer carbon chain, which increases the molecular weight and results in stronger intermolecular forces, giving it a higher boiling point than the previous two. The fourth compound has the longest carbon chain and has multiple branches, which increases the surface area of the molecule and the strength of the intermolecular forces, giving it the highest boiling point.

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Answer:

The answers are 4, 2, 3, 1

Explanation:

Answer:

13.6 m

Explanation:

To find the wavelength, you need to use the following equation:

c = λ · f

In this equation,

-----> c = speed of light (3.0 x 10⁸ m/s)

-----> λ = wavelength (m)

-----> f = frequency (Hz)

You can plug the given values (speed of light and frequency) into the equation and then solve for "λ".

c = λ · f                                                        <----- Equation

(3.0 x 10⁸ m/s) = λ · (2.20 x 10⁷ Hz)           <----- Insert values

13.6 = λ                                                      <----- Divide both sides by 2.20 x 10⁷