Chemistry Questions and Answers

  • The ability of an electron to attract electrons to itself is called?
  • The activation energy?
  • the amount of heat released by a reaction is measured with a?
  • the appearance of the simulated wastewater at the start of our experiment.?
  • The better the conceptual model of an atom is, the better it:?
  • The bond angle in H2Se is about:?
  • the book sucks!?
  • the Calculated amout of product that should be produces based on the amounts of reactants is known as the what
  • the catalysts used in your body are called _____?
  • The cause and challenges of lime deposits?
  • The Change in Entropy?
  • The characteristic odor of pineapple is due to ethyl butyrate, a compound containing carbon, hydrogen, and oxy
  • The chief reason why reaction rates increase with temperature is that a rise in temperature increases the # of
  • The chloride ion Cl- is?
  • The coefficient of Fe2O3(s) in the balanced equation should be?
  • the common ion effect and buffer systems?
  • the complete combustion of ethanol produces carbon dioxide and water according to the following chemical equat
  • the complete combustion of ethanol produces carbon dioxide and water according to the following chemical equat
  • The computer writes electron configurations in the form, for Fe for example, [Ar]4s(2)3d(6)?
  • The concentration of AgCl is 1.8 x 10^-10. What is the concentration of the CL-?
  • The concentration of KCl in a solution prepared by adding 0.0660 mol of KCl to 1.00 mol of water is ?% by mass
  • The condensation reaction between 2 amino acids has a water molecule as one product....?
  • The density of a noble gas is 5.35 g/L at 3.00 atm and 0°C. Identify the gas.?
  • The density of gold is 19.3 g/cm3.?
  • The density of mercury , the only metal to exist as liquid at room temperature, is 13.6?
  • The different types of intermolecular forces question!? Needs Checking!?
  • the dot and cross diagram for ozone?
  • the earlist people to use aromatic?
  • The effect chemical bonding does to solubility?
  • The electromagnetic waves emitted by a nucleus are called?
  • the electron transfer between atoms of magnesium and fluorine can produce what ions?
  • The Element Cobalt?
  • The emperical formula of maleic acid is CHO. Its molar mass is 116.1 g/mol. What is its molecular formula?
  • The energy involved in a phase change is______ than that of a chemical change.?
  • The energy liberated in a chemical reaction comes from the?
  • the enzyme in whose presence glucose and fructose are converted into alcohal is?
  • The equation H3PO4+3KOH--K3PO+3H2O is an example of which type of reaction?
  • The equation H3PO4+3KOH--K3PO3+3H2O is an example of which type of reaction?
  • the equilibrium above is established by placing solid NH4HS in an evacuated container at 25?
  • The equilibrium-constant expression for the reactionTi(s) + 2Cl2(g) <----->TiCl4(l) is given by:?
  • The exchange of oxygen and carbon dioxide through the cell membrane and the capillaries can be explained by?
  • The fiber in your diet is really?
  • the flory.krongpaum theory?
  • the follow reaction is exothermic, Heme-O2 + C0 --> Heme-CO +O2. Which bond is stronger Heme-O2 or Heme-CO?
  • The formula for iron (3) bromide, is FeBr3 (the 3 is a small subscript).this formula shows than one formula
  • the greek letter (triangle) stands for?
  • The half life for the beta decay of potassium-40 is 1.3*10^9 years. what is the rate constant?
  • The half life of Sr-90 is 28 years. hOw long will it take for a given sample of Sr-90 to be 90% decomposed?
  • The heat transfer: conduction comes in all mediums right? (solids, liquids and gas)?
  • The heating curve of water.?
  • The historical development of atom models?
  • The individual particles in a covalent solid are held together as a result of?
  • The IUPAC name for diisobutylacetylene?
  • The Ksp(25oC) for CaCO3 is 5.8 x 10-9. What is the [Ca2+] at equilibrium if only CaCO3(s) is added to water?
  • The lable on the shampoo claims that it is pH balanced. What do you think "pH balanced" means?
  • The large sugar crystals found in rock candy are essentially clear.?
  • The largest number of elements are classed as?
  • the main scientific diificulty in achieving a controlled fusion process is the?
  • the major product in the alkylation of dimethoxybenzene?
  • The mass of 1.63 x 1021 silicon atoms is?
  • the metal BISMUTH PLEASE HELPPPPPP!!!! easy best answer!?
  • the metal bismuth!!!! easy best answer!!! help!!!?
  • The name of the scientist who got Nobel prize for his work done for his PhD thesis.?
  • The number of atoms in a molecule of Ca3(PO4)2 is?
  • The number of protons in a stable nucleus is always?
  • The number of units of NaOH needed to react with 1 unit of H3PO3 to form Na3PO3 and H2O is?
  • The O-H bond in water is polar because?
  • the optimum conditions for haber process the reaction?
  • The osmolarity of a solution is numerically equal to:?
  • The oxidation number for the given elements?
  • The pain killer morphine is a weak base when added to water. The reaction produces one mole of hydroxide ions?
  • The particle with a negative charge is the...?
  • The partition coefficient of x between Ether and for water is 25.0 at 20 degrees C. Calculate the mass of?
  • the partition coeficcient for Iodine between water and for Carbon di Sulfide is 2.43x10^-3. a 100cm sample of?
  • the periodic table ?
  • The pH of a bicarbonate-carbonic acid buffer is 7.80?
  • The pH of a bicarbonate-carbonic acid buffer is 7.80?
  • The pH of pure water at some temperature is 5.63. What is the value of Kw at this temperature?
  • The pH of pure water at some temperature is 5.73. What is the value of Kw at this temperature?
  • the phase of mitosis in which the sister chramatids separate from each other is _____________?
  • The pKa of vitamin c (ascorbic acid) is 4.17.?
  • The pressure exerted by 2.5 moles of helium gas in a 1.25 liter balloon is 3.45 atmospheres.?
  • The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-third of its original value,
  • The pressure of gas in a 600.0 mL cylinder is 65.0mm Hg.?
  • the price of hematite 99.995% and 99.9% and 99.95%?
  • the process of particles @ the SURFACE of a liquid changing from a liq. 2 a gas when the liq. is BELOW boiling
  • the products are the materials used in the reactions -- true or false?
  • The products of a combustion reaction do NOT include___.?
  • The properties of addition (vinyl) polymers depend upon factors?
  • The properties of vinyl polymer depend upon which factors?
  • the question is in the detail..thanks....?
  • the question.?
  • The rate constant of a reaction is 0.0002 L/(mol*s) at 186 degrees Celcius and 0.0003 L/(mol*s) at 252 degrees
  • The reaction of an alcohol with which reagent will form a tertiary-butyl ether?
  • The reaction of baking soda and vinegar is chemical... what evidence is put forward to prove this?
  • The reaction?
  • The role of equilibrium in modulating pH in the respiratory?
  • The role of hexokinase in the first part of glycolysis?
  • the seperation of chemicals?
  • The simplest collection of atoms from which an ionic compound's formula can be establishedis called a(n)?
  • the small, dark, cylindrical structure just outside the nucleus are the____________?
  • the solubility of all Nitrates is?
  • The solubility of Ar at a pressure of 2.5 atm is ______ M?
  • The solubility of Carbonates is?
  • The solubility of CO2 gas in water?
  • The solubility of Hydroxides is?
  • The solubility of most Chlorides is? Are there any exceptions?
  • The solubility of Sulfates, Sulfides, and Silver salts is?
  • The solubility of which one of the following compounds will increase if the pH of a saturated solution of the?
  • The specific heat capacity of water ?
  • The substance Pure?
  • The sun's light on a bright day is about 1000 Watts per square meter. Given that the total US energy?
  • the theories ob out electron configuration?
  • The Thermit reaction was once used for making crude welds. The Theremit mixture is composed of aluminum..HELP!
  • The thermometer exploded in boiling water. Is mercury poisonous or anything?
  • The use of radioactive isotopes as tracers in biological processes?
  • the valve on a propane gas tank can withstand 200 lb/in squared inch..?
  • The vapor pressure of water is 17.5 mmHg at 20 Degrees Celsius. Calculate the heat of vaporization of H2O?
  • The volume of 1 mole of hydrogen gas (H2) at Standard Temperature and Pressure (STP) is what?
  • The volumes of 50.0 milliliters of an ideal gas at STP increases to 100. milliliters?
  • theoretical yield (in kg) of carbon dioxide emitted by a car in one year, assuming 1.32 104 mi/y, 27 mi/gal,?
  • theory of calculating the percentage of iron in iron tablets?
  • There are a pair of elements known as the "twins". what two are they?
  • there are crystals stuck to the top of the phenol-chloroform-isoamyl alcohol bottle. What are these?
  • There is a culture of bacteria with 1 x 10 to the 8 cells ml-1.?
  • Thermochem problems! Please Help!?
  • Thermochemistry help!!?
  • Thermochemistry problem!?
  • THERMOCHEMISTRY problem?
  • Thermochemistry Q.?
  • Thermochemistry?
  • thermodynamics plz help!?
  • Thermodynamics question?
  • Thermodynamics Question?
  • thermoplastics & thermosetting plastics?
  • Thin Layer Chromatography & Column chromatography??
  • Thin Layer Chromotography?
  • think about it?
  • This is a chemistry question.?
  • this is about lipids.. :)?
  • This is an experiment. Please help me if you know the answer.?
  • this is an ozonolysis problem and addition of hydrogen?
  • This is for ((((rhsaunder))))?
  • This is for the Science Geeks?
  • This is how I did it but it is still wrong?
  • this is my chemistry h.w i am stuck on this question. Can you help please?
  • this is the equation for gibbs energy. what do the capitalized symbols each represent?
  • This photo represents a moveable piston and a cylinder. the cylinder contains 1000 mL of gas G at STP?
  • This question applies to Atomic spectroscopy. The 2 Cd 326nm and Cd 228nm lines have an excitation energy.
  • this question has been bugging me?! please help me?
  • this question is for ((((((((james b)))?
  • Three dimensional Structures?
  • Three small questions dealing with concentrations of solutions and Beer's Law?
  • Three types of heat.?
  • titanium burns?
  • Titrating pink into clear means?
  • titration - 10 points for the first correct answer and procedure!?
  • Titration Anyone ;)?
  • titration buffer?
  • Titration Calculation problem...?
  • Titration Equivalence Point Question?
  • titration help?
  • Titration of a Weak Acid with Strong Base?
  • Titration of a Weak Acid with Strong Base?
  • Titration of acids and bases?
  • Titration of Ammonia?
  • Titration of Weak Acid with Strong Base?
  • titration question?
  • Titration, please help!?
  • Titration--any good questions about it??
  • titrations at equivalence point?
  • Titrations problem?
  • to extinguish fire ,, which type of water will u prefer?? COLD or HOT??
  • To find the number of moles in for example: NAOH do i add the sum of the atomic masses?
  • To make 40cm3 of 1 mole salt solution from a 2m stock solution do I...?
  • To make a solution with a pH = 3.80 a student used the following procedure :?
  • To make a solution with a pH = 4.10 a student used the following procedure :?
  • To make a solution with a pH = 4.10 a student used the following procedure :?
  • To make a solution with a pH = 4.20 a student used the following procedure :?
  • To make a solution with a pH = 4.50 a student used the following procedure :?
  • tomorrow have test please help!! about wavelength, energy level.?
  • Too much of which metal as an alloy can make the metal brittle?
  • topic about highschool chemistry?
  • totalionic equation for mgs04 and na2c03?
  • Toxic Chemicals?
  • transformation of MM294 e coli using pGLO?
  • Transisomers?
  • transmutation is the change in a nucleus due to the change in the number of protons?
  • Treating tosylates with NaOH?
  • Trends on the periodic table?
  • Trinitrotoluene?
  • tritation problem?
  • Trivia...first person to get it right wins ten points?
  • Troublesome chem problem with specific heat and heat transfere?
  • True or False ionic character of the bond in real diatomic molecules ...?
  • True or False : It's always best to balance hydrogen and oxygen first when balancing equations?
  • True or false and other stuff (below)?
  • True or False for the following and a little description why it is for 10 points!?
  • true or false- the chemical substance responsible for communicating stimulus information is a hormone?
  • True or false!! Please help!! Molecular level, increasing concentration?!?


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