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Chemistry

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

229,206 Questions

What are some foods that contain acids?

Limes, Lemons, Oranges, Grapefruit.

Apples, Pear,

Strawberries, Blackberries, Raspberries, Tayberries, Blackcurrants, RedCurrents.

Any non=tropical fruit.

Also used as a sauce, rather than a foodstuff, vinegar (Ethanoic/Acetic Acid). ,

How would you separate an alcohol-water solution into pure alcohol and pure water?

By distillation.

Heat the solution to a temperature between the boiling point of water and the boiling point of alcohol.

The one with the lower boiling point will boil first . Then it is passed throught a condenser to be collected in a receiving flask. This leaves behind the other liquid with the higher boiling point in the distillation flask.

Is pure water classified as a solution?

Pure Water is NOT a solution/solute/solvent. It is water without anything else in it.

When say salt, is dissolved in water , it then becomes a solvent. The salt being the solute, and the whole system being a solution.

Why is water not classified as a mixture?

Water is not classified as a mixture because it is a pure substance with a definite chemical composition (H2O). A mixture, on the other hand, consists of two or more substances physically combined with no fixed composition.

Does water have a definite chemical composition?

YES!!! The chemical composition of water is two stoms of hydrogen and one atom of oxygen, covalently combined. .

It is given the formula ' H2O '. It has a structural arrangement of ' H-O-H 'It could be named as

Di-hydrogen oxide

Di-hydrogen monoxide

Hydrogen oxide

hydrogen monoxide.

but nobody uses these names. It is universally, WATER '.

What can you do to help the world about water?

There is any amount of water in the world. It is called seas and oceans.

However, the problem is its Salty.

Build de-salination plants to convert salt/sea water to potable fresh water.

Next construct pipelines and reservoirs from the de0salination plants to near the point of use/reservoirs.

However, the problem is its Salty. t well known ; it is done by osmosis. where water of different saline concentrations as pass through a semipermeable membrane.

The pipelines need very little power. The Romans constructed aquaducts with a 2 degree slope, so the water would flow , without surging. To ift water from one level to an higher level , use the Archimedean Screw(Power).

What is a gas lighter and how is it used?

Buying a gas lighter online makes it easy to compare different designs, features, and prices from home. Look for a durable, easy-to-use lighter with a comfortable grip and a reliable ignition mechanism for convenient kitchen use

How do you prepare Barfoeds reagent?

To prepare Barfoed's reagent, dissolve 1.0 gram of copper(II) acetate (Cu(CH3COO)2·H2O) in 10 mL of distilled water, then add 1.0 mL of acetic acid (glacial). After mixing, dilute the solution to a final volume of 100 mL with distilled water. This reagent is used for the detection of reducing sugars, particularly monosaccharides, in carbohydrate analysis.

Is tin dug up out of the ground?

Yes, tin is extracted from the ground, primarily in the form of the mineral cassiterite (tin oxide). Mining operations, whether through open-pit or underground methods, are used to extract this ore. Once obtained, the ore is processed to extract pure tin metal, which is then used in various applications, including electronics and packaging.

What is the volume of ethanol that contains 35ml of solute dissolved in 115 ml?

To find the total volume of ethanol containing 35 ml of solute dissolved in 115 ml, you simply add the volume of the solute to the volume of the solvent. Therefore, the total volume is 35 ml (solute) + 115 ml (solvent) = 150 ml. Thus, the volume of the ethanol solution is 150 ml.

What are slats in chemistry?

NO such word as 'slats' in chemistry.

I think you mean 'SALTS'. Mispelled; note the transposition of the 'a' & 'l'

A salt, or more correctly a 'Chemical Salt'. is a substance that has a metal cation and an acidic anion.

General formula 'M^(n+)' + A^(n-) = MA '

They are always written in the form of ' MA '. Unless it is an organic salt. such as sodium ethanoate(acetate)

Such substances are chemical salts.

Sodium Chloride (NaCl) ' Table salt.

Calcium carbonate (CaCO3)

Aluminium nitrate ( Al(NO3)3 )

Copper sulphate (CuSO4)

Barium phosphate (Ba3(PO4)2)

Are just a few examples . There are thousands more examples. On dissolution in water , they will all exhibit a pH ~ 7 (neutrality).

How does friccohesity chemistry nanoformulate thermodynamically, kinetically, tentropically stable nanoformulations?

Friccohesity chemistry leverages the interplay between friction and cohesion at the nanoscale to create stable nanoformulations. By optimizing the thermodynamic interactions among particles, it enhances the stability of the formulations through minimized agglomeration and improved dispersion. Kinetically, it ensures that the particles remain in a stable state by controlling the rate of reactions and phase transitions. Additionally, the concept of tentropically focuses on maintaining thermal stability, allowing the formulations to withstand temperature fluctuations without degrading, thus ensuring their efficacy in various applications.

How many atoms in carbonate?

The Carbonate anion has four atoms.

1 x carbon

3 x oxygen

Giving the formula ' CO3^(2-)' It does NOT exists in its own right as a substance, but in combination with a metal. e.g. CaCO3 Calcium carbonate.

What is the formula for H3PO4?

' H3PO4 ' IS the formula.

The name of the substance is 'phosphoric acid'.

Why are some organic compounds flammable?

Some organic compounds are flammable due to their molecular structure, which often contains carbon and hydrogen atoms that can readily react with oxygen during combustion. The presence of functional groups, such as alcohols or alkenes, can also influence their flammability by altering their volatility and the energy required to ignite them. Additionally, compounds with lower molecular weights tend to have higher vapor pressures, allowing them to mix more easily with air and facilitate combustion. Overall, the ability to combust is largely determined by the compound’s chemical bonds and physical properties.

What happens if I vape?

Vaping involves inhaling aerosol produced by an electronic cigarette or similar device, which typically contains nicotine, flavorings, and other chemicals. This can lead to a range of health effects, including nicotine addiction, respiratory issues, and potential cardiovascular problems. Additionally, the long-term effects of vaping are still being studied, but it may pose risks similar to or greater than traditional smoking. It's important to be aware of these risks before choosing to vape.

What is chemical formula of bitumen?

That's correct—bitumen doesn't have a single chemical formula because it's a complex mixture of high-molecular-weight hydrocarbons, along with small amounts of sulfur, nitrogen, oxygen, and trace metals. Its exact composition varies depending on the crude oil source and refining process.

If anyone needs a deeper explanation of bitumen's composition, properties, or practical calculations (such as estimating bitumen quantity for paving projects), I recently found a detailed resource that explains these topics clearly: BitumenCalcPro. It may be useful if you're looking for more technical information or calculation examples.

What is the charge on the formulae for ethanoate?

'-1'

Ethanoate (Acetic) anion is CH3COO^(-) .

The symbol ^(-) means ' -1'

What are the substances found on the left side of the arrow in a chemical equation called?

Reactants.

On the Right side of the arrow they are products.

If a double headed arrow ' ' , then this is an equilibrium system.

Set going by addition of reactants, but reaches a point where the products react to form the original reactants again. It is a dynamic system, defined by ' Rate of forward reaction is equal to rate of backward reaction'.

What bond is in NBr3?

In NBr3 (nitrogen tribromide), the bonds present are covalent bonds. Nitrogen forms three single covalent bonds with three bromine atoms by sharing electrons. This results in a trigonal pyramidal molecular geometry due to the presence of a lone pair on the nitrogen atom. The bonds are characterized by differing electronegativities, with nitrogen being more electronegative than bromine, leading to polar covalent characteristics.

If two substances are brought in contact it will result in physical?

If two substances are brought into contact, it can result in physical changes such as mixing, dissolving, or phase changes, depending on the nature of the substances involved. These interactions can alter properties like texture, density, and state (solid, liquid, gas) without changing the chemical composition of the substances. For example, mixing salt in water creates a saline solution, which is a physical change. However, if a chemical reaction occurs, it would result in a chemical change rather than a physical one.

What classification is polypropylene?

Polypropylene is classified as a thermoplastic polymer, specifically belonging to the polyolefin family. It is made from the polymerization of propylene monomers and is known for its versatility, chemical resistance, and low density. Polypropylene is widely used in packaging, textiles, automotive components, and various household products due to its durability and ease of processing.

What is the chemical name for Polypropylene?

Polypropylene is the correct chemical name.

It is the polymer formed from the monomer propene.

Propene has the structure. H2C=CHCH3

When it polymerises the double bond breaks open to form a single bond between the carbons and the 'broken' open ends combine with the next monomer to form the polymer.

Structurally it is represented by '

--[-CH2 - CH(CH3)- ] -- (n)

NB There are NO double bonds present.

The ;'n' represents 'n' number of monomers forming the polymer. 'n' can be in the thousands or even millions.

Polypropylene makes an artificial rope.

NB PVC is polyvinyl chloride. In this case the 'CH3; group is replaced by a chlorine atom.

--[-CH2 - CHCl- ] -- (n) from CH2=CHCl Chloroethene

Polystyrene is the same again except that the 'CH3'/Cl' is replaced with a phenyl group *C6CH5)

--[-CH2 - CH(C6H5)- ] -- (n) from CH2=CH(C6H5) Phenyl ethene/ .