Chemistry Questions and Answers

  • Testing for a carboxylic acid using iron (III) chloride please?
  • Tetrafluroethylene forming a small segment of Teflon polymer?
  • The "little boy" BOMB...its cover ,its made of what?! which metal exactly?
  • The ___________ of locusts destroyed Mr Barns entire maize last year.?
  • The 2nd most abundant element in the earths crust and has 14 neutrons?
  • The ability of a substance to affect colligative properties depends upon its__________?
  • The acid conentent of a 25.00mL aliquot of vinegar is to be assayed using 0.1M NaOH. Continued below?
  • The activation energy for the following reaction is 125 kJ/mol, and E for the reaction is -216 kJ/mol.?
  • The addition of which nitrate salt will caus a decrease in the concentration of I^-(aq)?
  • The algebraic sum of the oxidation numbers of a compound is?
  • The answer is: sequential granualization, what is the question?
  • The Arrhenius definition of a base requires that its water solution yeild?
  • The atomic mass of an element is calculated using the?
  • The atomic mass of element X is 24.42 amu. A 37.22 g sample of X combines with 88.1 g of another element,Y...?
  • The atomspheric pressure on top of Mount Everest is 58kPa.What is this pressure in atmospheres?
  • The basic unit of life.?
  • The below reaction results in two moles of a single ionic compound as a product.?
  • The below reaction results in two moles of a single ionic compound as a product.?
  • The below reaction results in two moles of a single ionic compound as a product.?
  • The below reactions are followed by one or two statements.?
  • The below reactions are followed by one or two statements.?
  • The best way to be sure that MnS has completely precipitated from a saturated H2S solution is to?
  • The bond angles between carbon and hydrogen in methane are best labeled as...?
  • The bond enthalpy or energy of N2 is larger than that of H2?
  • The bond surrounded by the box is generally called an amide bond. In the above structure, found in proteins, i
  • The Briggs-Rauscher Reaction:Mechanism of a complex reaction?
  • The calcium cation (Ca+) has how many total electrons and how many valence electrons?
  • The carbon-14 decay rate of a sample obtained from a young tree is 0.296 disintegration per...?
  • The carbon-14 decay rate of a sample obtained from a young tree is 0.376 disintegration per second per gram?
  • The chair you are sitting in is composed of atoms that are empty space. why don't you fall through the chai
  • The chair you are sitting in is composed of atoms that are empty space. why don't you fall through the chair
  • The change in the oxidation state of a species lets you know if it has undergone _______ __ _______.?
  • The charge of any one ion is determined by its?
  • The chemical equation of sodium chloride + copper sulfate.?
  • The chemical reaction between an acid and a base to produce a salt and water is called?
  • The CO molecule has the bond order:?
  • The coefficient in front of each substance in a chemical reaction indicates?
  • The combustion of 20.68 mg of compound Y, which contains only C, H, and O, with excess oxygen gave 57.94 mg...
  • The compound formed as a result of oxidation of ethyl benezene by KMnO4 is?
  • The computer writes electron configurations in the form, for Fe for example, [Ar]4s(2)3d(6)?
  • The computer writes electron configurations in the form, for Fe for example, [Ar]4s(2)3d(6)?
  • The computer writes electron configurations in the form,?
  • The concentration of glucose in blood is approximately 90mg/100ml. What is the weight/volume percent -?
  • The concentration of glucose in blood is approximately 90mg/100ml. What is the weight/volume percent -?
  • The correct Lewis Structure for CO2 shows that the molecule contains two double bonds.?
  • The correct set of 4 quantum numbers for the outermost elsectrons of rubidium (Z=3) is?
  • The critical pressure of a substance is a value that is necessr to:?
  • The critical temp of sulfur dioxide is 157.2C while that of water is 374.0C What does this indicate about ...?
  • The dead sea is the saltest sea in the world. it contains 332 grams of salt per 1000 grams of water.?
  • The dead sea is the saltiest sea on earth. it contains 332 grams of salt per 1000 grams of water. what is the?
  • The density of an aqueous solution of HCl that is 20.00 percent by weight is 1.0980. Calculate the molarity?
  • The density of gold is about 19 g/mL. How would i calculate the volume of one gold atom?
  • The difference in two energy levels of at atom is 3.55x10 to the -19 Joules?
  • The dihydrogen phosphate ion undergoes the below reactions in water. What is the conjugate base of H2PO4-?
  • The dissolved substance may be a solid, a ___________, or a ________. It is called the ___________?
  • The double-coiled shape of DNA is called a?
  • The effects of rubbing alcohol?
  • The electron configuration of a copper atom is ?
  • The electron configuration...chemstry help?
  • The electron geometry and the molecular geometry of ammonia(NH3) are, respectively...?
  • The electronegativity value for Mg is 1.2 and the value for O is 3.5 Based on theses values, what type of bond
  • The element Cs freezes at 28.4 degrees Celsius and has molar enthalpy of fusion 2.09kJ/mol.?
  • The element with a company filled p-subshell is???
  • The energy value of an alcohol depends on the number of carbon atoms it contains?
  • The enthalpy change?
  • The equation for cadmium+chlorous acid yields cadmium chlorite +water+dichlorine monoxide?
  • The equilibirium constant of the reaction?
  • The equilibrium constant for the below reaction is less than 1. What is the strongest base in this system?
  • The equilibrium constant for the following reaction @ 527潞C is 5.10. If [CO] = 0.15 M, [H2O] = 0.25 M, [H2] =
  • The equilibrium constant, Kc, for the reaction: SO3 + NO <--> NO2 + SO2?
  • The equilibrium reaction below is endothermic, which change wil increase the amount of NO2 at equilibrium?
  • The estimated proven U.S. oil reserces in 2005 were 21.9 billion barrels.?
  • The experiment involves both iodine and iodide?
  • The extra cellular fluid volume of any animal can be measured by dilution technique using...?
  • The fact that road salt lowers the freezing point of ice on roads?
  • The Faster Rate?
  • The fluorescent tube implodes instead of exploding , when it breaks. Give reasons?
  • The following people could be expected to exhibit positive nitrogen balance except?
  • The following reaction?
  • The formula for beryllium carbonate is?
  • The four main substances in the air?
  • The freezing of a liquid involves a _______ of energy by the liquid.?
  • The half-life, t 1/2, of 222Ra is 4.0 days and 1.0g of this isotope is present. How much 222Ra could we expect
  • The half-life, t 1/2, of 222Ra is 4.0 days and 1.0g of this isotope is present...?
  • The heat energy required to melt one mole of solid at its melting point is its ________?
  • The Henderson-Hasselbalch equation is written as follows: pH = pKa + log10([A鈥揮/[HA]).?
  • The high spin d 4 complex [Cr(H2O)6] 2+ is labile, but the low spin d 4 complex [Cr(CN)6] 4is inert. Explain.?
  • The highest known oxidation number for oxygen occurs in ?
  • The H-O bond is what kind of bond?
  • The hybridization of I in IF(subscript)4^- is?
  • The hybridization of the central atom in NO3- is?
  • The hybridization of the central nitrogen of N2O is:?
  • The importance of limiting reagents/reactants?
  • The ionization constant Kw of water at 60卤C is 1.0 x 10-13. What is the pH of pure water at this temperature?
  • The ionization constant of an acid tells?
  • The ionization of benzoic acid is represented by this equation...?
  • The ionization of hypochlorous acid (equation 1) has a Ka=3x10^-8 @ 25 degreesC. What is the K for equation 2?
  • The Ka for HCN is 6.2 x10^-10. What is the pH of a 1.00 M solution of LiCN?
  • The kinetic molecular theory of gases?
  • The Ksp for calcium phosphate Ca3(PO4)2 is 1.2 x 10 to the -29. What is the molar solubility?
  • The label on the shampoo claims that it's pH balanced. What do you think "pH balanced" means?
  • The lattice site in a crystal is where?
  • The least bond energy in Kcals per mole is found with?
  • The Lewis electron-dot structure of phosphorus trifluoride gives the central P, which one is correct?
  • The Lewis structure for the nitrate ion shows around the nitrogen. which 1 is correct?
  • The light colored silicate minerals all contain what?
  • The local atmospheric pressure is 560mm of Hg. What is the pressure in Pascals?
  • The mass defect in a particular nucleus is?
  • The mass of a chlorine atom is 5.90 x 10^-23g. How many atoms are there in a 23 g sample of chlorine?
  • The mass of a Ge atom is 74 amu. Its atomic # is 32. How many protons are in its nucleus?
  • The mass of sodium hydrogencarbonate which will react with 36,5g of hydrochloric acid?
  • The mechanism for fischer esterification reaction between acetic acid & ethyl alcohol catalyzed by acid?
  • The melting involves a _______ of _______ energy by the particles of the solid.?
  • The molality of a sodium nitrate aqueous solution is 1.44m. What is the mole fraction of sodium nitrate?
  • The molcule XF3 is polar. is X boron or phosphorus? the 3 is a subscript.?
  • The most reader-friendly organic chem book?
  • The most widely used solvent for chemical reactants is _________?
  • The n=_____ principal shell is the lowest that may contain a d-subshell.?
  • The name given to such crystals as CuSO4.5H2O which contain water is _____.?
  • The noble gasses are found in what column?
  • The nucleus of an electricaly neutral iron atom contains 26 protons.how many electrons does this iron atom hav
  • The number of electrons that form a single covalent bond?
  • The number of Li atoms in 6.7 mol Li (Li atoms)?
  • The number of neutrons in the nucleus of an atom is 12 and the number of protons, 13.?
  • The organization of the periodic table represents diversity and unity because...?
  • The oxidation number of a hydrogen is?
  • The Periodic Table?
  • The pH of .10 M (CH3)3NHCl (aq) is 5.40. What is the value of Kb for (CH3)3N?
  • The pH of a .001 M NaOH solution is?
  • The pH of a 0.012 M solution of a weak base was determined to be 11.40. What is the Kb for this base?
  • The pH of a buffered solution?
  • The pH of a solution for which [OH-] =1.0x10^-3 is?
  • The pH of a solution is 4.7 What is the H3O+ and OH?
  • The pH of an aqueous solution of sodium hydroxide is 12.9. What is the molarity of the solution?
  • The possible combinations of the various isotopes of hydrogen and oxygen result in the existence of ____ .?
  • The pressure exerted by 1.3 mol of gas in a 13 L flask at 22 掳C is __________ kPa.?
  • The procedure for converting any zinc salt ( like zinc sulphate, zinc chloride ) to zinc oxide directly.?
  • The process of DNA replicaion results in a copy of the original strand of DNA ..true or false?
  • The process of what produces a new copy of an organisms genetic information which is passed on to a new cell?
  • The product of esterification of vanillin in the presence of an acid?
  • The property of certain substances, such as calcium chloride, to take up water from the air to form a solution
  • The radioactive decay of T1-206 to Pb-206.?
  • The radioactive isotope 32P decays by first-order kinetics and has a half-life of 14.3 days.?
  • The random molecular motion of a substance is greatest when the substance is...?
  • The rate constant of a rxn is.?
  • The rate of a nuclear reaction can be changed by?
  • The rate of forward reaction would increase or decrease by increasing [ B ]?
  • The reaction 2HCl <---> H2 + Cl2 has Kc = 3.2 x 10^-34 at 25 C.?
  • The reaction below is spontaneous at room temperature but becomes nonspontaneous at a much higher temperature.
  • The reaction for the oxidation of NH3 is given as...4NH3+5O2>>>4NO+6H2O?
  • The reaction of 2 chemical is exothermal if 2 chmical is cmbined nside a tstube, the outer of the tstube will?
  • The reaction of water to separate the ions of an ionic solid and surround them with water molecules is called?
  • The reaction that produces the above polymer is an ____________ reaction?
  • The reaction: CO(+2charge) +6 NH3= CO(NH3)6 (+2charge)?
  • The reaction: HI + Cl --> HCl + I Predict whether it will be exothermic or endothermic and why.?
  • The reason of forming amino acid?
  • The reason salt crystals, such as KCI, hold together so well is because the cations are strongly attracted to.
  • The region that is the most probable location of an electron in an atom is?
  • The result of addition is called?
  • The rontgen or roentgen (R) is a unit of measurement of ionizing radiation in air, either X or gamma rays?
  • The rusting or iron is fairly complex but may be written as follows, showing the overall process:?
  • The saline solution used to soak contact lenses is primarily NaCl dissolved in water.?
  • The same # of moles of NH3 & O2 are placed in seperate bulbs of equal volume and temperature... (more details)
  • The sequence of what carries the genetic information of an organism?
  • The Shape of the CO3 2- ion is best described as?
  • The shapes of a molecule for?
  • The silver ion is ______ ______ to gain electrons.?
  • The simplest aromatic amine is called what?
  • The size of an atom generally increase how on the periodic table?
  • The size of an atom of a particular element. . . .?
  • The solid will...?
  • The solubility of a substance can be expressed as?
  • The solubility of a substance is 8.00g per 100g of water How many grams of the substance will dissolve in 250g
  • The Solubility of Copper (I) and Copper (II) Oxides?
  • The solubility of KCl in water is 34.0g of KCl/100g of H2o at 20 degree celsius...?
  • The Solubility Product Constant of Sodium Chloride?
  • The specific heat capacity of silver is 0.24 J/掳Cg.?
  • The specific heat of aluminum is 0.214 cal/g鈥egrees C?
  • The specific heat of silver is 0.237 J/g掳C. Its melting point is 961掳C. Its heat of fusion is 11 J/g. How much
  • The sructural products resulting from CH3CH2CO2 + CH3OH --->?
  • The starting substances (ingredients) that are evoled in a chemical reaction.?
  • The statement is below.?
  • The strength of an acid or base is a measure of...?
  • The structure of products of CH3CH2OH + acetic anhydride--->?
  • The structure of the protein depends on the sequence of .. lipids, monosaccharides, amino acids, nucleosides.?
  • The substance containing many OH negative ions is a_________?
  • The substance produced as a result of a chemical reaction.?
  • The synthesis of trichloroacetaldehyde w/ H2O has a low yield, how could this be altered to increase the yield
  • The synthesis of trichloroacetaldehyde with water has a low yield.?
  • The temperature of a 2.5 L of a gas intially at STP is raised to 523K at constant volume.?
  • The transfer to pollen, male gamete, in plants to the stigma which contains the female gamete.?
  • The uses of nickel?
  • The valence shell of the element X contains 2 electrons in a 5s orbital. Below that shell, element X has a par
  • The value of 鈭哠掳 for the oxidation of carbon to CO2, C(s, graphite) + O2(g) -> CO2 (g) is ___ J/K?
  • The value of 鈭哠掳 for the catalytic hydrogenation of acetylene to ethane is ___ J/K, H2(g) + 2H2(g) ->C2H6(g)
  • The vibrational transition v=0 to v=1 for carbon monoxide occurs at wave number of 2143.3cm. Calculate value o
  • The water of crystallization can usually be driven off by _________?
  • The weight of protons neutrons and electrons?
  • Then why rock salt also causes explosion when they are mixed with coke?
  • Then, what happens to the size of the associated ions (as you go across a period): e.g. Na+--> Mg 2+-->Al 3+


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