Chemistry Questions and Answers

  • Show me the molecular structure of plastic, margarine and butter.?
  • Show that benzoic acid is 50% ionized at pH 4.2. pKa is also 4.2?
  • Side reactions in Acylation of Ferrocene?
  • Sigma and Pi Bonds: Problem Set Question?
  • Sign conventions ...positive or negative ??
  • Significance of the relationship of mass and volume?
  • Significant Digits and Density?
  • Silver Nitrate reacts w/ potassium Chloride to produce solid silver and what?
  • Silver tarnishes and turns black/black--do you think it is a physical change or a chemical change?
  • Silver vs. Chloride ion in solution?
  • Similarities between the two main types of bonding; ionic and covalent?
  • Simple Chemistry Questions?? help please?
  • Simple organic chem question!?!?
  • Simple qestion on enthalpy?
  • Simplest form?
  • Simplest question in world in chem.?
  • Since battery acid is obviously corrosive, how is it that the battery casing can stay intact?
  • SN1 and SN2 reactions?
  • SN1 reaction mechanism?
  • So arsenics number is 33 and its weight is 74.92. whats the P, N, & E's? also what if it was negativly charged
  • So i just shot gunned two monsters ..?
  • So theres molecules...what exactly gives them their different colours??
  • Sodium acetate apple cider vinagar + bakeign soda?
  • Sodium acetate in a store?
  • Sodium acetate?
  • Sodium Fluoride?
  • Sodium hydroxide (NaOH) solutions are often standardized by titration against weighed samples of solid...?
  • Sodium ions have a charge of +1. This is because?
  • Sodium+water=?
  • Solar Energy to mass ?
  • Solid lithium nitrade decomposes with heat to give lithium nitrade and oxygen gas. if 1.55 g of lithium nitrat
  • Solubility chart?
  • Solubility of Oxides and hydroxides?
  • Solubility problem?
  • Solubility Question Need Help QUICK?
  • Solubility Question... Please Help?
  • Solubility?
  • Soluble substances?!?!?
  • Solution for Smelly Laboratory?
  • Solutions of NaCl and Pb(NO3)2 are mixed, how many precipitation reactions will there be?
  • Solve the inequality?
  • Solve this reaction scheme given.?
  • Solvent extraction of granules with binders.?
  • Solvent of cucurbituril?
  • Solving a word equation?
  • Solving a word problem .(kelvins & degrees Celsius)?
  • Solving Chem problem?
  • Solving word problem?
  • Solving.. please help?
  • Some acid questions, true of false?
  • Some chem help please and thank you much?
  • Some chemical symbols are apparently unrelated to the names of the elements to which they refer. Why?
  • Some common examples of acids ,bases ,salts with their tastes?
  • Some help with formulae of covalent molecules?
  • Someone help me to grasp how atoms differ only by number of nuclear patrticles?
  • Someone tell me some unique topics about biology aand physics project of cl;ass12?
  • Someone tell me the anatomy of odor in the air. Such as curry or w/e. I it a molecule?
  • Something in Chem lab that i'm curious about.?
  • Sometimes you get an extra flame spike from a lighter flame?
  • Spa water maintence, anyone help?
  • Specific heat of regular and anhydrous Magnesium Sulfate?
  • Specific heat?
  • Specific heat?
  • Specific Heat?
  • Spliting atoms?
  • Spontaneity of RedOx Reactions?
  • Spontaneity of RedOx Reactions?
  • Standard Deviation Formula?
  • Standard Entropy and Entropy Change of Reactions?
  • Standard molar enthalpy of SrCO3?
  • Standards for Measurement>>>need your help?
  • Starch reacts with iodine gives blue colour.then y,when adding iodised salt with rice is not giving any colour
  • Steam distillation questions..?
  • Steps to take a slow whether it is a pure substance or a homogeneous mixture?
  • Stoichiometry?
  • Strong acid / Weak base? How to determine??
  • Strongest acid?
  • Structural formula for following alkenes?
  • Structure and Bond for XeO3F2?
  • Structure of atoms published as of 2006-2007?
  • Structure of this compound.?
  • Structure, shape, and bond angle for NF3, TeCl2, CCL4 and SO2?
  • Studying for organic chemistry??
  • Stuff with limting reagents and products etc..help!?
  • Substances whose particles pass through filters but cannot pass through semipermeable membranes are called?
  • Substituting sodium bicarbonate for sodium carbonate to produce H2. Will it still work?
  • Sugar dissolves when stirred into water. The sugar is the ___, the water is the ___, and sweetened water is___
  • Suggest any photoactive emulsion for screen printing which after exposing wont get washed with HNO3 & water.?
  • Suggest e possible reasons for the differences between the measured height n calculated ht in purge dip system
  • Sulphuric acid & its saltes thereof?
  • Sunlight hitting a solar panel produces ______ what? THANKS 4 ALL UR HELP!?
  • Super easy chemistry question, I'm just confusing myself. Please help?
  • Superheating water?How?
  • Suppose a balloon is filled so that its volume is 2.00 L when the pressure is 1.10 atm and the temperature is?
  • Suppose u r given 2 solutions a and b,how will u identify,which one is element and compound?
  • Suppose you carry out a TLC separation of acetaminophen and ibuprofen on a silica gel. Higher Rf?
  • Synthesis of bis(triphenylphosphine)copper(2) borohydride?
  • T or F, the subscripts in a molecular formula can be found from the mole ratio of the elements in the compund?
  • T or F,Using percentage composition,a chemist can only deduce the ratio of atoms/ ions, not the actual number?
  • Technique and Theory of the synthesis of isopentylacetate?
  • Tell me about different stories which are reflective of any feature of democracy?
  • Tell me all the ferrous and non-ferrous metals?
  • Tell me the names of any 4 scientists?
  • Test for hydrogen gas?
  • Test methods for presence of these compounds and others in the same family?
  • Test your knowledge (for serious thinkers) Chem question dealing with theoretical yield..?
  • Tetracycline is not administered to pregnant women because it accumulates in which of the following, from whic
  • The # of electrons passing by a certain point in an electric current is the? the speed of the electrons " " "
  • The _____ is the minimum energy needed for a chemical reaction to begin.?
  • The 210 isotope of the element with atomic number 82 undergoes emission of an alpha particle.?
  • The acid used in making fertilisers and explosives is _____________?
  • The addition of any solute to a solvent will...?
  • The addition of any solute to a solvent will...?
  • The alcohol in this list that would be most soluble in water is what?
  • The balanced equation for the complete combustion of C5H12 will give which of these product(s)?
  • The balanced net ionic equation when AgNO3 and MgCL2 are mixed is?
  • The balanced net ionic equation when Co(NO3)2 and NaOH solutions are mixed is?
  • The balanced net ionic equation when Na3PO4 and NH4OH solutions are mixed is?
  • The balanced net ionic equation when Sr(NO3)2 and Al2(SO4)3 solutions are mixed is?
  • The boiling point of a liquid occurs...?
  • The burning of ethane produceds both Co2 and H2O. If 200mL of C02 is produced at 20 degrees celcius and...
  • The burning of ethane produces both CO2 and H2O. If 200 mL of CO2 is produced at 20°C and 750 torr, what...?
  • The Carbon Cycle?
  • The central atom in the Chlorate anion is surrounded by how many bonds,pairs,or unshared pairs?
  • The combination of two or more atoms form?
  • The common name for the compound CH3-CH2-CH2 - O - CH2-CH3 is what?
  • The common name of CH3-CH2 - O - CH2-CH3 is what?
  • The common unit of radioactivity which is used to measure the biological damage is the what?
  • The compound MgCl2 is named?
  • The concentration of HCL is ____M?
  • The concept of a molecular clock is based on the idea that?
  • The constituents of water?
  • The correct name for the compound N2O3 is?
  • The correct sequence of the stages of the cell cycle is?
  • The daughter element of carbon-14 is_____ {what}??
  • The density of Pre-1982 penny is about 8.9 g/cm^3--do you think it is a physical change or a chemical change?
  • The density of zinc is 455 lbs/cu.ft. Find the mass of 9 cu. cm. of zinc in grams.?
  • The dominant animal life during the MESOZIOC ERA was the dinosaur/reptile.. TRUE OR FALSE??
  • The effect of salt on the rate of rusting?
  • The elements having atomic no. 93 and more are called transculanic elements or transuranic elements or what ??
  • The exhaus from a tractor in a river, increases the rivers ph to be more acid or alkaline?
  • The fermentation of glucose to produce ethyl alcohol...?
  • The fermentation of glucose to produce ethyl alcohol may be represented by the equation...?
  • The fermentation of glucose to produce ethyl alcohol may be represented by the equation...?
  • The fermentation of glucose to produce ethyl alcohol may be represented by what equation?
  • The formula for arsenic acid is?
  • The freakiest phenomenon I ever saw! How did I create a fireball?
  • The functional group contained in the compound CH3-CH2-OH is a...?
  • The greatests [H+] will be found in which of the following aqueous solutions?
  • The ground state of an unidentified hydrogen like ion is - 217.6ev. calculate the atomic no and identify the?
  • The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/(mol•K). The conversio
  • The hydrophobic effect stabilizes protein structures by increasing the order of the surrounding water molecule
  • The IUPAC name for CH3CH2C=CCH is?
  • The Ka of a weak acid, HA, is 3x10-4.?
  • The Kb of ammonia is 1.77x10^-5.?
  • The linear sequence of monomers in a polypeptide chain is referred to as its ______ structure.?
  • The lowering of oxidation state of metal is called ???
  • The maximum wavelength in this experiment is 615 nm, (orange color). but coper(II) solution not orange. why?
  • The medhods to exposure to chemicalsanalysis of surfactants?
  • The most important way to classify an organic compound is by --?
  • The name of H2CO3 is?
  • The names of the following compounds?
  • The normal boiling point of acetic acid is 117.9oC. Which of the following is true?
  • The number of calories needed to raise the temperature of 32 g of water from 12°C to 54°C is?
  • The number of moles of a compound dissolved in one liter of a solution is called the what?
  • The original volume is 125 mL. Find the new volume if the pressure changes from 700 torr to 500 torr...?
  • The oxide of which element below can react with hydrochloric acid?
  • The Peridic Table Of Elements?
  • The pH of 500 mL of .1 M HCl is equal to 1. Roughly how much water needs to be added so that the pH=2?
  • The pH of a 0.0322 M solution of a weak acid is 2.457. What is the percent ionization of the acid?
  • The pH of a 0.0666 M solution of a weak acid is 2.529. What is the Ka of the acid?
  • The pH of a solution is 8. What is the [H+] and [OH-] in this solution?
  • The pH scale is logarithmic. What does a "1" vs. "2" actually mean on this scale?
  • The pKa of acetic acid, HC2H3O2, is 4.75. Whats the pH the buffer [HC2H3O2] = 0.2 M and [NaC2H3O2]= 2.0M?
  • The process that occurs in this system is ?
  • The product of a precipitation reaction is always a(n)?
  • The question is for sean F..& top contribute answer person?
  • The ratio of equivalent Li2O to eq. Na2O is 0.33 to 1 (by mass). What will be the molar ratio of Li:Na?
  • The ratio of the lengths of corresponding parts in two similar solids is 4:1?
  • The reaction 2NO-->N2+02 is exothermic, heat of reacton=-180kJ/mol. Which 1 of the statements is true?
  • The reaction of an alkene and water in the presence of an acid catalyst to produce an alcohol is called;?
  • The sea level would rise if the earth got hotter because part of the _______ cap would melt (FILL IN THEBLANK)
  • The simplest cycloalkane has...?
  • The simplest cycloalkane has:?
  • The SN1reaction is generally given by?
  • The solubility of compound A is 21.3 g/mL of cold water (20 degrees C). If 12.4 g of compound A is stirred?
  • The solubility of KI is 50 g in 100 g of H2O at 20°C. If 110 grams of KI are added to 200 grams of H2O,?
  • The solubility of KI is 50 g in 100 g of H2O at 20°C. If 110 grams of KI are added to 200 grams of H2O.?
  • The solubility of lead chloride PbCl2 is 1.6x10^-2M. What is the Ksp of PbCl2?
  • The specific heat of ice is 0.48 cal/g-oC. The heat of fusion of ice is 80 cal/g. What will?
  • The stage at which stoichiometric equivalent amounts of substances have reacted is the...?
  • The standard emf for the cell using the overall cell reaction below is +0.48V:?
  • The standard potential for the reaction of Zn (s) and Cl2 (g) is?
  • The standard potential for the reaction of Zn (s) and Cl2 (g) is?
  • The sum of the pH and the pOH is?
  • The ternary acid HBrO3 is named?
  • The tetron is polyester, right?
  • The two basic types of cells are ______ and ______.?
  • The two liquids hexane and heptane form a solution in which both components are volatile. Their vapor...?
  • The value of change in internal energy in joules for a system that loses 50J of heat and has 150J.?


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