Density of 1kg of metallic sphere is 2.5 gcm-3 then the volume occupied by sphere is?

Answer:

b. molecule, compound, pure substance

Terms that only describe carbon dioxide are molecule, compound, pure substance.

In chemistry mixture is a combination of two or more different chemical elements which are not chemically bond. A mixture is the physical composition of two or more elements in which their individual identities are vanished and it also mixed by solutions, suspension and colloids.A compound can't be separate by physical separation and after the mixture you can't identified that it is compound or not.

In chemistry compound is combination of two or more different elements which are chemically bond. So compound is made up of  chemical bond. A compound can't be separate by physical separation and after the mixture you can't identified that it is compound or not.A mixture is the physical combination of two or more elements in which their individual identities are retained and it also mixed by solutions, suspension and colloids.

Therefore, terms that only describe carbon dioxide are molecule, compound, pure substance.

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Answer: 7.5 mol

Explanation: yes

0.83moles of Sulfur is required to react with 2.5 moles of sulfur dioxide. This can be answered on the basis of Concept of stoichiometry. The correct option is option D

Stoichiometry is a part of chemistry that help us in making relationship between reactant and product from quantitative aspects. The total mass of the molecule on reactant side must be equal to the total mass of molecule on the product side.

For our question the balanced equation is

SO₂+ 2H₂S → 2H₂O + 3S

The mole ratio of sulfur dioxide to Sulfur is 1:3, means 1 part of sulfur dioxide will give 3 parts of sulfur.

Moles of sulfur dioxide=3×Moles of sulfur

2.5moles÷3=Moles of sulfur

0.83moles =Moles of sulfur

Thus the moles of Sulfur to react with sulfur dioxide is 0.83moles. Option d is correct option.

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Electrons enter the 4s sub-level before the 3d sub-level because the 4s sub-level has a lower energy level than the 3d sub-level.

According to the Aufbau principle, electrons fill the lowest energy levels first before occupying higher energy levels. In the case of the electron configuration of atoms, this means that the 4s sub-level, which has a lower energy than the 3d sub-level, is filled before the 3d sub-level.

Therefore, when electrons are added to an atom, they first fill the 4s sub-level before moving on to the 3d sub-level, even though the 3d sub-level is technically of a higher principal quantum number (n) value. This electron filling order follows the Aufbau principle and the energy levels of the sub-levels.

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When an inert gas, such as argon (Ar), is added to a reaction mixture at constant volume, it behaves independently of the chemical reaction occurring. Inert gases do not participate in the reaction or undergo any chemical changes themselves. Instead, they simply occupy space within the container.

Since the addition of argon does not affect the concentrations or partial pressures of the reacting species, it does not cause any changes in the equilibrium position. The reaction will continue to reach and maintain its equilibrium state with the same partial pressures of the reacting species as before the addition of the inert gas.

Therefore, in the given scenario, the partial pressures of the reacting species, such as P(NO2) and P(N2O4), will remain unchanged when a small amount of argon gas is added to the equilibrium mixture at constant volume.

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Answer:

B. 20m/s

Explanation:

The wavelength of a wave can be calculated using the formula;

λ = v/f

Where;

λ = wavelength (m)

v = velocity (m/s)

f = frequency (Hz)

According to the information provided in this question; the wave has a wavelength (λ) of 2m and a frequency (f) of 10Hz.

Using λ = v/f

v = λ × f

v = 2 × 10

v = 20m/s.

Since various molecules have varying masses, the mole fraction is distinct from the mass fraction since it reflects a percentage of molecules. The sum of molefraction of all the components is always equal to one. Here the molefraction is 0.35.

The mole fraction is the product of the number of molecules of a specific component in a mixture and its total molecular weight. It is a means to convey how concentrated a solution is.

The molar fraction can be represented by X. If the solution consists of components A and B, then the mole fraction is,

Molefraction = Moles of A / moles of A + moles of B

Let mass be 70.4 g and moles of water is 2.0.

n = 70.4 / 63.01 = 1.11

X = 1.11 / 3.11 = 0.35

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Your question is incomplete, most probably your full question was:

Concentrated nitric acid is 70.4% HNO3 by mass in 2.0 moles of water . What is the mole fraction of nitric acid.

Answer:

1. F, H, E

2. A, D, I

3. G

4. E, B, H

5. C

Explanation:

The pH of the solution is 5.2, which means that the solution is slightly acidic. The correct answer is option c) 5.2.

To find the pH of the solution, we need to use the Henderson equation, which relates the pH of a solution to the pKa of the acid and the ratio of the concentration of the acid and its conjugate base. The Henderson equation is given as pH = pKa + log([A-]/[HA]), where [A-] and [HA] are the concentrations of the conjugate base and acid, respectively.

In this case, we are given that [HA] = 2[A-], which means that the ratio [A-]/[HA] is 1/2. The pKa of HA is given as 5.5. Plugging these values into the Henderson equation, we get:

pH = 5.5 + log(1/2)

pH = 5.5 - 0.3

pH = 5.2

Hence, c is the correct option.

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A- and H3O+ interact, causing A-'s concentration to drop and [HA] to rise. As a result, the [NaA]/[HA] ratio declines. Because of the base content, the buffer's pH will be more acidic. The concentration of the acid, HA, has increased while A- has decreased.

What is Acid?

Any material that when dissolved in water has an acidic taste, can alter the colour of some indicators (such as reddening blue litmus paper), can react with some metals (such as iron) to release hydrogen, can combine with bases to produce salts, and can accelerate some chemical reactions (acid catalysis). Acids are examples of organic chemicals that belong to the carboxylic acid, sulfonic acid, and phenol groups as well as the inorganic substances known as the mineral acids, such as sulfuric, nitric, hydrochloric, and phosphoric acids. These chemicals contain one or more hydrogen atoms, which are discharged as positively charged hydrogen ions when they are in solution.

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Answer:

One of the most common methods used today to determine the composition of stars is spectroscopy.

Explanation:

Spectroscopy is the study of the interaction between matter and electromagnetic radiation as a function of the wavelength or frequency of the radiation.

Explanation:

For both men and women, the basics of a balanced diet are the same. Men have higher caloric requirements than women since they have a bigger body (both in height and weight) and more muscular mass.

So, Men needs more energy.

50 year old woman require less energy than 50 year old man.​

Answer:

MgO.

Explanation:

charges of both satisfy one another (balanced) -- producing a compound MgO.

Answer:

The 3 stressers are 1. Adding or removing reactants or products. 2. Changing the total pressure or volume. 3. changing the tempature of the system.

Explanation:

All three of these are stressers that can be applied.

-Hope This Helps!

-Justin:)

Answer: hola

Explanation:Añada cinco gotas al 2 por ciento de tintura de yodo de farmacopea EE. UU. (U.S.P., por sus siglas en inglés) por cada litro de agua limpia. Para el agua turbia añada diez gotas y deje la solución reposar durante 30 minutos por lo menos.

Answer:

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor. Least Common Multiple of 2 and 15 with GCF Formula The formula of LCM is LCM (a,b) = (a × b) / GCF (a,b).

Explanation:

Answer:

C. Low boiling point

Explanation:

I'm sure it's right

The compound SF4 is likely to exhibit a low boiling point.

Sulfur tetrafluoride (SF4) is indeed likely to exhibit the property of a low boiling point. The boiling point of a compound depends on various factors, including its molecular weight, intermolecular forces, and molecular structure.

SF4 has a relatively low boiling point for several reasons:

1. Molecular Weight: SF4 is a small molecule with a molecular weight of about 108.06 g/mol. Smaller molecules tend to have lower boiling points compared to larger molecules because they have weaker intermolecular forces.

2. Molecular Structure: SF4 has a bent molecular geometry with a lone pair of electrons on the sulfur atom. This lone pair leads to molecular asymmetry, which results in a molecule with a polar covalent bond between sulfur and fluorine atoms. The presence of polar covalent bonds contributes to dipole-dipole interactions, which are relatively weaker compared to hydrogen bonds or ion-dipole interactions.

3. Intermolecular Forces: The primary intermolecular forces in SF4 are dipole-dipole interactions. While these forces are present, they are not as strong as hydrogen bonding (found in compounds like water) or ion-dipole interactions, which would result in higher boiling points.

Due to these factors, SF4 is expected to have a low boiling point, making it a gas at or near room temperature and standard atmospheric pressure. However, specific values for boiling points can be influenced by factors such as pressure and impurities. It's always a good practice to consult a reliable chemical database or reference for precise physical property data.

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Answer:

(1s)^2 (2s)^2 (2p)^3

Explanation:

Nitrogen has 7 electrons. Hence, the structure will be,

=>(1s)^2 (2s)^2 (2p)^3

Hope it helps:)

The electronic configuration is used to explain the orbitals of an atom and it helps to determine the physical and chemical properties of the elements. The electronic configuration of Nitrogen is 1s² 2s² 2p³. The correct option is B.

The distribution of electrons in the atomic orbitals is given by the electronic configuration. It is a standard notation in which all the electrons holding atomic subshells are arranged in a sequence. Each element has a unique electronic configuration.

The electronic configuration of an element can be written in two ways, in standard notation, and in condensed form. In the case of elements with larger atomic numbers, the electronic configuration becomes lengthy in standard notation. So in such cases condensed form is generally used.

The electronic configuration of 'N' of atomic number 7 in standard form is 1s² 2s² 2p³ and in condensed form it is [He] 2s²2p³.

Thus the correct option is B.

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-1.09'C is the change in freezing point

“Freezing point depression” depends on the solvent and the molar concentration of the solute.

Sulfide is highly basic, consequently

K2S

completely and irreversibly hydrolyzes in water according to the following equation:

K2S+H2O→KOH+KSH

Freezing, also known as solidification, is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point.

the temperature at which a liquid solidifies specifically : the temperature at which the liquid and solid states of the substance are in equilibrium at atmospheric pressure : melting point the freezing point of water is 0° Celsius or 32° Fahrenheit.

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Answer:1.0881

Explanation:

The best assessment of Gina's prediction is that the several medium-sized cubes will dissolve faster than the large cube of sugar.

The surface area of a substance refers to the total area on the surface of that object.

Surface area plays a vital role in the dissolution of a substance. When a solute dissolves, the action takes place only at the surface of each particle.

This suggests that when the total surface area of the solute particles is increased, the solute dissolves more rapidly, hence, the best assessment of Gina's prediction is that the several medium-sized cubes will dissolve faster.

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Electrovalent compounds are those that are created when one or more electrons are transferred from one atom to another inside the compound. NaCl is an electrovalent substance because it shares an electron with other compounds to produce them.

A material created by chemically joining two or more distinct components. Examples of compounds are table salt (NaCl), which is generated from the elements sodium and chloride, and water (H2O), which is created from the components hydrogen and oxygen.

One carbon atom and two oxygen atoms combine to form carbon dioxide. One carbon dioxide molecule contains four covalent connections. Because neither carbon nor oxygen are metals, we can infer that carbon dioxide is a covalent molecule.

Pure substances known as compounds are created chemically when two or more elements are combined in a specific mass proportion. Chlorine and sodium combine to form sodium chloride (common salt).

Thus, sodium chloride is called an electrovalent compound whereas carbon dioxide is called covalent compound.

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Wavelength is chosen by analyzing the spectrogram.

Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.

A spectrogram gives a going for walks show of a sound signal because it takes place in real time, a spectrum, however, offers us a photograph of the sound at a particular factor in time. A spectrum can permit you to see.

Spectrograms map out sound in a comparable way to a musical rating, only mapping frequency rather than musical notes. Seeing frequency energy allotted over the years in this manner allows us to genuinely distinguish each of the sound factors in a recording, and their harmonic shape.

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The final equilibrium temperature of the copper and water is 38.7°C. The further explanation is shown below.

To find the final equilibrium temperature of the copper and water, we need to use the equation for calculating heat transfer. The equation is as follows:

Q = mcΔT

Where Q is the heat transferred, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature. In this case, we need to find the heat transferred by the copper and the heat absorbed by the water.

For the copper, the heat transferred (Q) is equal to the mass of the copper (m) times the specific heat capacity of copper (c) times the change in temperature (ΔT). The specific heat capacity of copper is 0.385 J/g°C, and the change in temperature is 100°C - 30.0°C = 70.0°C. Therefore, the heat transferred by the copper is equal to 0.385 J/g°C * 230 g * 70.0°C = 13,705 J.

For the water, the heat absorbed (Q) is equal to the mass of the water (m) times the specific heat capacity of water (c) times the change in temperature (ΔT). The specific heat capacity of water is 4.184 J/g°C, and the change in temperature is the final equilibrium temperature - the initial temperature of the water, which we don't know yet. We'll call the final equilibrium temperature T. Therefore, the heat absorbed by the water is equal to 4.184 J/g°C * 340 g * (T - 30.0°C) = 1457.6T - 44152 J.

Since the total heat transferred must be equal to the total heat absorbed, we can set the two equations equal to each other and solve for T. This gives us 13,705 J = 1457.6T - 44152 J. Solving for T, we find that the final equilibrium temperature is equal to T = (13705 J + 44152 J) / 1457.6 = 38.7°C.

Therefore, the final equilibrium temperature of the copper and water is 38.7°C.

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Answer:

2 8 8 8 8 1

Explanation:

Standard temperature and pressure (STP) is defined as a temperature of 0 degrees Celsius (273.15 Kelvin) and a pressure of 1 atmosphere (atm). The correct answer is C. Outdoors on a summer day.

While conditions may vary, outdoors on a typical summer day, the temperature and pressure are more likely to be close to the standard conditions. Inside a car tire (Option A), the air pressure can be higher than atmospheric pressure due to inflation. Above a bowl of ice water (Option B), the temperature may be lower than standard temperature. Above a pot of boiling water (Option D), the temperature is higher than standard temperature. At the top of a tall mountain (Option E), the atmospheric pressure is lower than at sea level, resulting in non-standard pressure. Therefore, the most likely location where the air would be at standard temperature and pressure is option C, outdoors on a summer day.

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Explanation:

First find the mass of 1 mole of water (Molecular mass)

\( H_{2} O = 2H + O \)

\(

= 2(1) + 32 \)

\(

= 34 \: grams

\)

Hence 1 mole of water is 34 g

Compare

1 mole = 34 g

1.33 mole = x g

\( \frac{x}{34} = \frac{1.33}{1} \)

\(

x = 1.33 \times 34 \)

\(

\color{blue}{\boxed{x = 45.2}} \: \: \: \: to \: 3 \: s.f.

\)

Therefore 1.33 moles of water is 45.2 grams

The mass of the substances can be given by the molar mass and the moles of the substances. The mass of 1.33 mole of water is expressed in grams as, 23.94 grams.

The mass has been defined as the product of the moles of the substance and the molar mass in grams per mole. The mass is given in grams and has a formula,

Moles = mass ÷ molar mass

Mass = molar mass × moles

Given,

Moles = 1.33 moles

Molar mass of water (H₂O) is calculated as = 2 (1) + 16= 18 grams per mole

Using the formula of mole, mass is calculated as:

Mass = molar mass × moles

mass = 1.33 × 18

= 23.94 grams

The mass of the substance can be calculated if the value of the molar mass and the moles of the substance has been known. The molar mass of the substance can be calculated by adding the mass of the individual masses of the element in a molecule.

Therefore, 1.33 mol of water contains 23.94 grams.

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1. Fluid compressibility (C): Fluid compressibility refers to the measure of how much a fluid's volume changes in response to a change in pressure.

2. Solution-gas/liquid ratio (SGLR): The solution-gas/liquid ratio represents the volume of gas dissolved in a given volume of liquid at a specific pressure and temperature.

3. Fluid formation volume factor (FVF): The fluid formation volume factor represents the ratio of the volume of a fluid at reservoir conditions (pressure and temperature) to its volume at surface conditions.

4. Fluid densities (ρ): Fluid densities refer to the mass per unit volume of a fluid.

5. Fluid viscosities (μ): Fluid viscosities represent the measure of a fluid's resistance to flow.

1.  Equation: C = -1/V * dV/dP

  Symbol: C

  Unit: 1/Pascal (Pa^-1)

  Correlation: The compressibility of fluids can vary depending on the fluid type. For ideal gases, the compressibility is inversely proportional to pressure.

2.Equation: SGLR = V_gas / V_liquid

  Symbol: SGLR

  Unit: Volumetric ratio (e.g., scf/bbl)

  Correlation: The solution-gas/liquid ratio is influenced by the pressure and temperature conditions, as well as the composition of the fluid.

3. Equation: FVF = V_reservoir / V_surface

  Symbol: FVF

  Unit: Volumetric ratio (e.g., bbl/STB)

  Correlation: The fluid formation volume factor depends on the composition and properties of the fluid, as well as the reservoir conditions.

4. Equation: ρ = m / V

  Symbol: ρ

  Unit: Mass per unit volume (e.g., kg/m^3)

  Correlation: Fluid densities can vary depending on the type and composition of the fluid. For example, water has a density of approximately 1000 kg/m^3.

5. Equation: No single equation; viscosity is measured experimentally using viscometers.

  Symbol: μ

  Unit: Pascal-second (Pa·s) or centipoise (cP)

  Correlation: The viscosity of a fluid is influenced by temperature and pressure. Different fluids exhibit different viscosities, ranging from low-viscosity fluids like water to high-viscosity fluids like heavy oil.

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