Chemistry
This category encompasses all questions about the composition, structure, properties, and reactions of matter.
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CaO valency of Ca is 2 valency of O is 2 2O atoms per 2 Ca atoms 1-1 ratio
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An ancillary ligand is a ligand on a chemical complex that is not directly involved in the chemistry. Ancillary ligands are often...
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In pool maintenance we use a bottle labeled R-004 to test the ph. In chemistry labs, you might use phenolphthalein solution,...
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Hydrolysis converts polymers to monomers by adding H2O between each monomer. In dehydration synthesis, the opposite occurs. As...
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Physical change: 1.) Melting Ice Cream 2.) Sharpening PencilChemical Changes: 1.) Rust 2.) Burning Candle
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Morter bowlAA2: Mortar and pestle. Sometimes, in big industry, a ball mill is used. It is like a big rock tumbler, with metal...
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because it is radioactive and because it is an alkali metal. but you shouldn't worry about francium because it is one of the...
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temperature
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No, no O2. This is a composition reaction. Two reactant species form one product.
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The 4 outer electrons put it right at the point in reactions where it can form compounds consisting of many things, the most...
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Melany stick
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diffusion rate and molecular weight are inversely relating--the larger the weight, the slower the diffusion rate; and the smaller...
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Carbohydrates / Sugars
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Nuclear explosions
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The question should be: Is ethanoic acid is more soluble than hexanoic acid in water? Yes because it has less carbons. Ethanoic...
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liquid water followed by ice, finally followed by vapor. You can verify this by thinking about what happens when ice is in a cup...
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Heavier molecules tend to have higher boiling points than lighter molecules.Polar molecules tend to have higher boiling points...
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H2O is more polar as oxygen is more electronegative than sulfur and will therefore attract the electrons more than sulfur
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the gram formula mass
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Water is able to dissolve so many compounds because of its polarity.
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Potassium chloride and water result from this reaction: KOH + HCl = KCl + H2O
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Oi the capital fisrt letters are always first.
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3 Ca2+(aq) + 2 (PO4)3-(aq)---------Ca3(PO4)2
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carbon 13;example:an isotope of carbon 12 i.e. it has same atomic no. as carbon 12. I.E 6 so it will have same no. of electrons...
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Magnesium chloride(MgCl2) and Hydrogen(H2)
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Selenium occurs naturally in a number of inorganic forms, including selenide, selenate, and selenite. In soils, selenium most...
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Atoms need to form covalent bonds in order to share electrons so that they can achieve a stable electronic configuration. ...
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Na2CO3 + 2HCl -> 2NaCl + CO2 + H2O A+ = 234 grams
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Getting that inside eyes, blood, lungs, or stomach
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Sodium and Chlorine
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The heat of the metal gets really REALLY high. Solid -> Liquid -> Gas Solids are colder, liquids inbetween, and gas hot. ...
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A molecule always consists of 2 or more atoms, otherwise they would just be atoms.
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A lump of sugar is a group like this= O . or more =) and the ground sugar was already broken down that is why.=)
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Therinja solla mattoma mundaigala
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You add heat :)
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It takes energy to melt ice, so energy which otherwise would have produced an increase in temperature is consumed by the change...
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No. Well, you can try, if you've got money to throw away. Balsamic vinegar is very expensive compared to distilled white vinegar,...
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volume decreases
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vaporisation
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you shop it/ put it in a bowl and mash it up, then add boiling water to help denature the cells and then you use a tray with dips...
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I think most of the compositions on our planet is of carbon and after evolution most of the inorganic compounds have reacted...
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Atomic radius of Iodine is very large compared to potassium.
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only for a second, then they go back to normal
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Put it in water, salt goes down and chalk floats.
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ethyl is C2H5 and propyl is C3H7 and cyclobutane is C4H8 so removing two hydrogens that will be replaced by the ethyl and propyl...
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In terms of struture, lone pairs contribute helping a molecule acquire a shape as dictated by VSEPR Theory (Valence Shell...
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One half of Avogadro's number, or about 3.011 X 1023.
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It dissolves nails as it is very acidic. The pH level is pretty low. The lower the level, the higher the acidity. It can corrode...
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this is because non metal have no free mobile electron that carry charges round it
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A quick google search yields your answer: http://en.wikipedia.org/wiki/Raspberry_ketoneIn english, it's the trivial name for...
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With the teacher....
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Due to global warming, it is neither polar or non polar. Therefore it is highly electronegative, and has a single bond.
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When excess CO2 is passed through lime water it forms calcium bicarbonate.
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Need formula of magnesium nitride, an ionic compound. Mg2+ and N3- together make Mg3N2 -------------- so 3 * 24.31 g = 72.93...
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Bismuth Bi and polonium Po both have an average atomic mass of 209 amu
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If you mean what was discovered on the sun before it was discovered on earth, the answer is helium.
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in the atmosphere
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It has to do with something called the Schrodinger equation, which is a mathematical representation of what an electron will do...
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sir humprhy davy discovered it in 1807 by running an electrical current through some potash (pot-ash) which melted it making...
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Only if its gravitational field is strong enough.
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Lets say, for example the enthalpy is equal to 1200 joules/gram.You take 1200 joules/gram * (# of grams)/one mole [now you can...
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no. of particles = n x Av where: n=mol, Av=6.02x10^23 Number of moles:- n=c x v where c=concentration ,,, V=volume n= m/M...
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Yes, but the greater the space, the more dilute the gas will be.
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Floats. (ex. ice in water: ice is less dense than liquid water, ice floats)
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your solute and solvent make up your solution, so unless there is someting with temperature those 2 must be it
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it is a physical change, not chemical.
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If the temperature decreases, the volume is also going to decrease, and if the pressure decreases, the volume is going to...
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Unless you have other sources of iodine in your diet, iodized salt is better. Low iodine can cause a wide variety of health...
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This is a single replacement reaction. The zinc replaces the copper in the sulfate compound. In general, if a reaction occurs...
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Both the ions, and the electrons that are part of those ions, are fixed firmly in place, and do not move easily when the ionic...
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So basically, when you stir a solution, it physically moves all of the chemicals around so the atoms of each are more evenly...
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In cold condition acetylene forms the formic acid and in hot condition it forms the oxalic acid with potassium permanganate.
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a)volume b)work c)pressure d)enthalpy e)they are all state function answer B
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80 gNaOH / 500 mL = (80 gNaOH / 40 gNaOH/molNaOH) / 0.500 L = 2.0 mol / 0.500 L = 4.0 mol/L
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Because matter cannot be created nor destroyed
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No, it is more electropositive
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Petrol (or gasoline as I call it) is a mixture of organic compounds derived from petroleum.
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Carbon tetraiodide is nonpolar due to the symmetry of its geometry.
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Molecular compounds are charge neutral. Molecular compounds dissolve in water as individual molecules. For example if 1.0g of...
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When magnesium is heated in air, it forms magnesium oxide and so the total mass increases.
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No. Ordinary n-hexane is C6H14 and is unsaturated. Cyclohexane is C6H12 as it has 1 unit of unsaturation due to its cyclic...
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Molarity = moles of solute/Liters of solution Without the solute name the mass ( 8 grams ) does no good. Mass of solute (1...
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There are two of'm: titanium dioxide, TiO2 (more common) or titanium monoxide, TiO
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Oxygen reacts with propane in a combustion reaction. C3H8 + 5O2 ---> 3CO2 + 4H2O
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Starch reacts with iodine to make a purplish-black color.
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Burning methane is a chemical change, as is burning anything as you are changing one set of substance into a completely different...
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It's actually physical since you haven't done anything to the log except make it into smaller pieces.
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NaOH is a sollid salt rather than liquid. when Na is in contact with air to spoil water,but the combination of O and H it gets...
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Yes H2C2O4 + 2NH3 --> (NH4)2C2O4
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By cooling, fractional compression and decompression, destillation at high pressure and low temperature.
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There isn't. This is a myth that has been passed on by drug addicts that have been trying various methods to get the various...
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Evaporate the water.
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