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Chemistry

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

213,040 Questions

What can destroy the neon element?

Neon, being an inert noble gas, is extremely stable and does not readily react with other elements. However, under extreme conditions such as high temperatures or pressures, neon can potentially react with highly reactive elements like fluorine to form compounds. Additionally, exposure to intense radiation or electrical discharges can ionize neon atoms, breaking them apart. Overall, while neon is very stable under normal conditions, extreme environments or interactions with highly reactive substances can potentially lead to its destruction.

What can be the viva questions on oxalate ions?

Oxalates are salts of oxalic acid containing oxalate ion. Oxalate ion is a dianion. Upon protonation, oxalate ion forms a commonly known compound, oxalic acid. The commonly known oxalate salts are sodium oxalate, potassium oxalate etc. The calcium metal ion reacts with oxalate ion to form an insoluble precipitate of calcium oxalate, which is the primary constituent of most of the common kind of Kidney stones.

What is the name of the molecular compound Nl3?

The name of the molecular compound Nl3 is nitrogen triiodide. This compound consists of one nitrogen atom bonded to three iodine atoms. Nitrogen triiodide is a highly sensitive and explosive compound that is typically handled with extreme caution due to its instability.

Why is soap not suitable for washing clothes when water is hard?

Soap is not suitable for washing clothes in hard water because hard water contains high levels of minerals such as calcium and magnesium ions. These ions react with soap to form insoluble salts known as soap scum, which can deposit on clothes and leave a residue. This can make clothes appear dingy and feel stiff. Detergents are more effective in hard water because they contain ingredients that prevent the formation of soap scum.

Why in an experimental work one or more than one reactant are deliberately used in excess quantity?

In experimental work, using one or more reactants in excess quantity is done to ensure that the reaction goes to completion. This is especially important when one of the reactants is expensive or difficult to obtain. By having an excess of one reactant, the reaction can proceed fully, maximizing the yield of the desired product. Additionally, using excess reactants can help to compensate for any side reactions or impurities that may occur during the reaction process.

Which is more reactive group 1 or 2?

Group 1 elements, also known as alkali metals, are generally more reactive than group 2 elements, known as alkaline earth metals. This is because alkali metals have one electron in their outermost shell, making them more willing to lose that electron to achieve a stable electron configuration. Alkaline earth metals have two electrons in their outermost shell, requiring more energy to lose those electrons and become stable.

What is the black substance that comes from burning wood?

The black substance that comes from burning wood is called soot. It is a carbonaceous material that is produced when wood or other organic materials are incompletely burned. Soot can be harmful to health and is a component of air pollution.

Write a short essay in which you create an analogy to describe particle motion.Compare the movements and positions of people dancing with the motions of water molecules in liquid water andin water vap?

Sure thing, honey! Picture this: people dancing at a wild party represent the energetic and chaotic movements of water molecules in liquid water, constantly bumping and jiving. On the other hand, water molecules in water vapor are like those lazy folks chilling at the back of the room, moving around freely but not as tightly packed as the dancers. So, in a nutshell, liquid water molecules are the life of the party, while water vapor molecules are the laid-back wallflowers.

What do you call a substance that does not dissolve in water?

Oh, dude, you're talking about something that's like totally insoluble in water. It's like, "Hey, water, I don't want to hang out with you," and just stays separate. So yeah, it's called insoluble. Like, water's trying to make friends, but this substance is like, "Nah, I'm good on my own."

How do you apply for post as a compound overseer?

Well, honey, to apply for a position as a compound overseer, you typically need to submit a resume and cover letter to the hiring manager or HR department of the company. Make sure to highlight your experience in managing compounds or similar facilities, as well as any relevant skills or certifications. Oh, and don't forget to follow up on your application – persistence pays off, darlin'.

Who manufacture redstone kerosene heaters?

Oh honey, redstone kerosene heaters are manufactured by a company called Redstone. Can you believe it? It's like they wanted to keep it simple or something. So if you're in the market for one of those bad boys, just look for the Redstone brand and you'll be good to go.

How many hydrogen atoms are present in 25.6g of Urea?

1. Given: UreaMolar Mass = 60.06g

Required: Number of Hydrogen atoms in 25.6g of (NH2)2CO

Formula:

Solution: n = 1 mole 6.022x1023 molecules 4 H atoms

25.6 g x ---------- x -------------------------------- x --------------

60.06g 1 mole 1 molecule

n = 1.03 x 1024 H

Answer: There are 1.03 x 1024 H atoms in 25.6g of (NH2)2CO

What is the freezing point of HBr?

Ah, the freezing point of HBr, or hydrobromic acid, is around -86 degrees Celsius, or about -123 degrees Fahrenheit. Just imagine those tiny HBr molecules slowing down and coming together like old friends, creating a beautiful icy dance at that chilly temperature. Remember, every little detail in nature has its own special place and purpose in the grand design of things.

What probably happened to the temperature of the air the flask and the wood during the reaction?

During a chemical reaction, the temperature of the air surrounding the flask and the wood likely increased. This is because chemical reactions often release energy in the form of heat, known as an exothermic reaction. As the reactants in the flask and the wood underwent a chemical change, the energy released would have heated up the immediate surroundings.

What are the raw materials in a calculator?

Well, isn't that a happy little question! The raw materials in a calculator include things like plastic for the casing, metal for the circuitry, silicon for the semiconductors, and of course some electronic components like wires and batteries. Just imagine all those materials coming together like a beautiful painting to help us crunch numbers and create wonderful things.

What element is1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2?

The element that has the orbital configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2 is Germanium (Ge). It could also be written as [Ar] 4s2 3d10 4p2.

What are the problems of changing from one legal structure to another?

Changing from one legal structure to another can be complex and costly due to legal and financial implications. Some common problems include tax consequences, regulatory compliance issues, potential loss of certain legal protections, and the need to reorganize business operations. It is crucial to carefully assess the implications of such a change and seek professional advice to navigate the process effectively.

Why is it that calcium is a soft grey metal that reacts quickly with water. Our bones contain calcium but they are not grey in colour and do not react with water?

Well, darling, calcium is a diva in the periodic table. It may be a soft grey metal that loves to party with water, but when it's in our bones, it's all about keeping them strong and not causing a scene. The calcium in our bones is too busy being a team player in our body to bother with water, it's got bigger fish to fry.

What was Aristotles contributions to the periodic table?

Aristotle did not contribute to the periodic table as we know it today. The periodic table was developed much later, in the 19th century, by Dmitri Mendeleev. Aristotle was a Greek philosopher and scientist who made significant contributions to fields such as logic, metaphysics, ethics, and biology, but not to chemistry or the periodic table specifically.

Why isn't automotive paint a homogeneous mixture?

Automotive paint is not a homogeneous mixture because it is composed of multiple components that do not uniformly mix together. These components include pigments, binders, solvents, and additives, each with different properties and functions. When mixed, they form a heterogeneous mixture where the different components may separate over time, leading to variations in color, texture, and finish.

Is hco3- polar or nonpolar?

I was wondering about this as well. Here is what I think and perhaps someone else could agree or disagree?

The base of HCO3 would be the CO3 2- polyatomic ion. This has a trigonal pyramidal shape according to VSEPR theory. Each oxygen will be spaced evenly around the carbon atom and thus the individual dipoles created between each C and O will cancel. No overall dipole would exist and the molecule would be nonpolar. BUT, when we add the H to one of the oxygen atoms, there is a dipole created between the H and O. This dipole would not be cancelled by anything and thus there would be a small dipole on this molecule which leads me to think it is polar.

Any thoughts?

Why does Carbon not react with Water?

Carbon does not react with water because the carbon-carbon and carbon-hydrogen bonds are much stronger than the carbon-oxygen bonds in water. In order for a reaction to occur, the bonds in the reactants must be broken and new bonds must be formed in the products. In the case of carbon and water, the energy required to break the existing bonds and form new ones is too high for a reaction to take place.

How many moles of Na2Cro4 are contained in 74.3 grams of the compound?

Oh, dude, let's break it down. So, first off, you gotta calculate the molar mass of Na2CrO4, which is around 205.99 g/mol. Then, you divide the given mass by the molar mass to find the moles. In this case, 74.3 g / 205.99 g/mol gives you approximately 0.36 moles of Na2CrO4. So, there you have it, like, around 0.36 moles of that stuff in 74.3 grams.