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Chemistry

This category encompasses all questions about the composition, structure, properties, and reactions of matter.

500 Questions

What is the standard state of rubidium?

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Asked by Wiki User

At STP it is a soft shiny metal, which readily oxidises to rubidium oxide in the atmosphere.

Since it is Group 1 pf the Periodic Table, it behaves like sodium or potassium . Since it 'lower' down the Group it reacts more vigorously that sodium or potassium .

What are 7 methods to separate mixtures?

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Asked by Wiki User

  1. Filtration: This method uses a filter to separate solid particles from a liquid or gas.

  2. Distillation: This method is used to separate two or more liquids with different boiling points by heating the mixture and collecting the vapors that are produced.

  3. Evaporation: This method is used to separate a solid from a liquid by heating the mixture until the liquid evaporates and leaves behind the solid.

  4. Chromatography: This method separates different components of a mixture based on their ability to be attracted to a stationary phase or solvent.

  5. Crystallization: This method is used to separate a solid from a liquid by cooling the mixture until the solid crystallizes out of the liquid.

  6. Centrifugation: This method uses centrifugal force to separate components of a mixture based on their density.

  7. Magnetic separation: This method separates magnetic substances from non-magnetic substances by using a magnet to attract the magnetic particles.

What is the correct way to write a chemical symbol for sodium?

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Asked by Wiki User

IUPAC (International Union for Pure and Applied Chemistry) has rules for writing chemical symbols and formulas. They are valid in all languages.

For compounds search in a library Nomenclature of inorganic compounds and Nomenclature of organic compounds, with the text adapted to your language, if necessary.

See the links below.

Why gases are less soluble in salt water than in pure water?

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Asked by Wiki User

Gases are less soluble in salt water than in pure water because the presence of salt ions in the water disrupts the hydrogen bonding between water molecules. This reduces the ability of gases to dissolve in the water, as the solubility of gases is primarily dependent on the strength of the intermolecular forces in the solvent. Additionally, the salt ions may also compete with the gas molecules for solvation, further decreasing gas solubility.

If you have city water could you still have hard water?

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Asked by Wiki User

Yes, it is possible to have hard water even if you have city water. City water is typically treated to remove contaminants, but it may still contain minerals like calcium and magnesium that contribute to water hardness. The degree of hardness can vary depending on the location and source of the water supply.

What should be done immediately in cases of a dry chemical burns?

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Asked by GaleEncyofMedicine

In cases of dry chemical burns, the affected area should be flushed with large amounts of water immediately. Remove any clothing or jewelry that may contain the chemical and continue to rinse the area for at least 20 minutes. Seek medical attention promptly, as dry chemical burns can cause significant tissue damage.

How would one go about changing their gas supplier to another?

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Asked by Wiki User

To change your gas supplier, you need to follow these steps:

  1. Research alternative gas suppliers in your area and compare prices and plans.
  2. Contact the new supplier and provide them with your current gas account details.
  3. The new supplier will facilitate the switch by contacting your current supplier and arranging the transfer.
  4. Review the terms and conditions of the new contract, including any early termination fees or requirements.
  5. Once the switch is confirmed, you will start receiving gas supply from the new supplier.

How long does it take for 75 of an original 100 silver atoms to decay?

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Asked by Wiki User

The decay rate of atoms is typically quantified by a half-life, which is the time it takes for half of the original atoms to decay. If we assume a constant decay rate, we can estimate that it takes approximately 3 half-lives for 75 of the original 100 silver atoms to decay. If the half-life of the silver isotope is 1 hour, then it would take approximately 3 hours for 75 of the atoms to decay.

Which ions is the limiting reagent and which is the reagent in excess when barium sulphate is made?

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Asked by Wiki User

When barium sulfate is made, the limiting reagent is the one that is completely consumed in the reaction and determines the amount of product formed. In this case, if barium ions (Ba2+) and sulfate ions (SO42−) are the reactants, the limiting reagent would be the one that is present in lower molar quantity. The one in excess would be the one that is present in higher molar quantity. Without the quantities of each ion provided, it is difficult to determine which is the limiting reagent and which is in excess.

Does Chile have a stable or unstable government?

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Asked by Wiki User

Chile has a stable government. It is a democratic republic with a long history of political stability. The country has a strong democratic tradition, with regularly held free and fair elections, and a well-established system of governance.

What chemical component of radish that can kill pests?

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Asked by Wiki User

One chemical component in radish that can kill pests is glucosinolates. When radish tissues are damaged, glucosinolates are released and converted into isothiocyanates, which have toxic effects on pests. These compounds act as natural insecticides that can deter or kill pests that may attack radish plants.

What is most equivalent to sugar from a chemical perspective?

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Asked by Wiki User

From a chemical perspective, the substance most equivalent to sugar is glucose. Glucose is a simple sugar and the primary source of energy for cells in our bodies. It has the same molecular formula, C6H12O6, as other sugars like fructose and galactose, but its chemical structure is slightly different.

Swanstone manufactures products for what areas of the household?

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Asked by Wiki User

Swanstone manufactures products for areas of the household such as kitchen and bathroom. They specialize in producing solid surface products like sinks, countertops, shower panels, and vanity tops.

Name the following acid Assume the compound is dissolved in water HI?

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Asked by Wiki User

The acid formed when the compound HI is dissolved in water is hydroiodic acid.

What stores can a person purchase glow in the dark stars from?

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Asked by Wiki User

A person can purchase glow in the dark stars from various places, including department stores like Walmart, Target, or Bed Bath & Beyond. Additionally, they can also be found in craft stores such as Michaels or Joann Fabrics, or online retailers like Amazon or Etsy.

What is the chemical name of kunzite?

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Asked by Wiki User

The chemical name of kunzite is lithium aluminum silicate, and its specific chemical formula is LiAl(Si2O6).

What information do you need to predict the mass of a reactant or product in a chemical reaction?

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Asked by Wiki User

To predict the mass of a reactant or product in a chemical reaction, you would need the balanced chemical equation for the reaction, as it provides the stoichiometric ratio between the reactants and products. Additionally, you would need the molar mass of the specific substance you are interested in. With this information, you can calculate the mass using stoichiometry and molar ratios.

How do you use basic h for dewormer?

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Asked by Wiki User

To use a basic h dewormer, you typically follow the instructions on the product packaging. This may involve orally administering the dewormer to the affected animal, usually mixed with their food or water, at the recommended dosage. Keep in mind that different dewormers may have different usage instructions, so it's important to read and follow the specific guidelines provided. Additionally, consulting with a veterinarian is always a good idea to ensure proper usage and dosage for your particular situation.

What is the significance of the real gas equation?

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Asked by ZahranSalehgp1944

The real gas equation, also known as the Van der Waals equation, is significant because it accounts for the deviations from ideal gas behavior. It incorporates corrections for intermolecular forces and the volume occupied by gas molecules, which are neglected in the ideal gas equation. This equation is crucial for studying real gases at high pressures and low temperatures.

What is the transition metal name for VSO4?

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Asked by Wiki User

The transition metal in VSO4 is vanadium.

What kinds of solutes expect to dissolve in nonpolar solvents?

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Asked by Wiki User

Nonpolar solvents are typically unable to dissolve polar or ionic solutes, as their molecular structure lacks the necessary polarity or charge to interact with these solutes. However, nonpolar solvents can dissolve nonpolar solutes, such as hydrocarbons or organic compounds with long chains of carbon and hydrogen atoms.

How are models useful for studying chemical reactions PLEASE IF YOu know the ANSWER please post it i need it really bad please thank you?

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Asked by Wiki User

Models are useful for studying chemical reactions because they allow scientists to visualize and understand how molecules interact and rearrange during a reaction. Models can help predict reaction outcomes, optimize reaction conditions, and design new compounds with specific desired properties. They provide a simplified representation of complex systems, making it easier to study and analyze the underlying principles and mechanisms of chemical reactions.

Is flotation a physical change or chemical change?

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Asked by Wiki User

Flotation is a physical change. It involves changing the density or buoyancy of an object in a liquid to make it float or sink. There is no chemical reaction taking place during flotation.

What is the formation of energy?

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Asked by Wiki User

Energy is formed through various processes. The most common formation of energy is through the conversion of fuel sources, such as burning fossil fuels for thermal energy or utilizing solar energy through photovoltaic cells. Energy can also be generated through nuclear reactions, chemical reactions, and even biological processes in living organisms. Ultimately, energy formation involves the transformation from one form to another, whether it be potential energy to kinetic energy or vice versa.

Are the chemicals used in darkrooms hazardous?

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Asked by Wiki User

Yes, some of the chemicals used in darkrooms can be hazardous if not handled properly. For example, developer and fixer solutions may contain toxic substances such as hydroquinone and hypo (sodium thiosulfate). It is important to follow proper safety protocols, such as wearing gloves and working in a well-ventilated area, to minimize potential health risks.