Chemistry Questions and Answers

  • I need chemistry help please?
  • i need chemistry help!! -- examples for factors affecting rate of evaporation?
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  • I need Chemistry help, someone explain this about Lead Acid Batteries?
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  • I need help balancing equations...if you can teach also...counting atoms?
  • I need help balancing this chemical equation??
  • I need help balancing this equation i can't get it (chem)?
  • I need help Classifying these 4 TYPES of each reaction:?
  • I need help doing this on my chem postlab, please explain how u got the pH? Thank You?
  • I need help finding the change in E (energy) for a thermodynamic problem?
  • i need help finding the molecular formula and empirical formula of a compound...?
  • i need help finding what would go on the x-axis or the y-axis?
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  • I need help in filling-in-the blanks: Artisinal and small-scale mining use ______ process to extract gold.?
  • I need help in math please....word problem..?
  • I need help making an animation about Atoms, Ions, and chemical bonds?
  • I need help naming these 4 Simple compounds...EASY!??
  • I need help naming these elements.??
  • I need help naming this element & electron config..?
  • I need help on one of my chemisty questions.?
  • i need help pleaseee!! on molecular weight ????
  • I need help remembering electron configuration?
  • I need help symboling & Naming these elements...?
  • I need help to balance this equation?
  • i need help understanding how to balance a chemical equation... the question is as followed:?
  • i need help w/ ions in solutions?!!???
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  • I need help with a chemistry question. 5.0g of sodium metal comes in contact with 2L of chlorine gas.?
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  • I need help with these balance equation questions.?
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  • i need help with these simple Problems..mostly naming...?
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  • I need information on the element chlorine:?
  • i need lots of info about h2o (water) plz help this is a cry 4 help?
  • I need lots of info about h2o (water) plz help this is a cry 4 help? its 4 hw?
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  • I need some help with a harder solubility question. Please look?
  • I need some help with this equilibrium question. Please Help?
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  • i need some info on chemistry application in industry and agriculture .?
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  • I need the balanced equations for the following esters please:?
  • I need the equation for Calcium acetate+potassium phospahate?
  • I need the equations for Aluminum + Sulfuric acid, and Magnesium+Silver Nitrate?
  • I need the equations for Cobalt (II) Hydroxide+Hydrobromide acid, and Zinc Oxide+Nitric Acid?
  • i need the number of grams of sulfur in 3.01x10 to the 23 power of S2O molecules?
  • I need the properties of natural colored polymers?
  • I need to calculate the Kd o f a hormone H that is binded to a specific binding protein HBP.?
  • I need to convert 588.68 m^3 to L?
  • I need to find the products for this reaction...?
  • I need to isolate crude benzoic acid from.?
  • I need to lower alkalinity in 800 gal of water...?
  • I need to make up a fake product for a Science project. Do you have any ideas?
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  • i so need help on half life problems?
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  • i suck at these converting problems...does any one know an easy way for these problems?
  • I think this question is hard?
  • i wanna if anyone of you knows a website where i can search the "CHEMICAL ABSTARCT" by subject?
  • i wanna know if there is any use of x-rays in current science except da medical research?
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  • I want buy nonyl phenol 100% from china. I can do search.But I doesn't found.can help me?
  • I want info on the following chemicals:-?
  • i want known as BHA( butylated hydroxyanisloe)?
  • i want ortho phosphoric acid(H3PO4)normality of 85%.please tell me the addresses of shops who sales in India?
  • I want to build a gas thermometer, anyone know how?
  • i want to contact to a person that is porfessional in anisotropic elasticity?
  • I want to know why Fe3O4 is written in this way??
  • I want to make cellulose acetate for a high school chemistry class demo. Cuprammonium process?
  • I want to rinse with hydrogen peroxide (10 % solution) but will have a unpleasant taste?
  • i want to the uses of these chemicals?
  • i want view t.y.b.sc exam time table for chemistry dept. in mumbai university?
  • I wanted to know the name of this song,it came with a cartoon..?
  • i was told olive oil must be refrigerated after it is opened...?
  • I was told that Aluminum could not be sterilized, is this true?
  • I was wondering how many times a "mole" of 8 inch long pencils could go to the sun and back. Show me how!
  • i was wondering that what is the reaction rate of h2so4 and naoh?
  • i wish to know other method to do the sulphur dioxide in food? i using H202 method.?
  • ice cream and french fries?
  • ice,water,juice?
  • I'd just like to know something?
  • idenitify each of the following as a pure substance, a solution, or a mixture?
  • Identify 3 familiar chemical changes.?
  • identify intermolecular forces?
  • Identify solvents and solutes in the given solutions-----?
  • Identify the conjugate acid-base pairs. NH^3 + H2O<--->OH + NH^4?
  • Identify the conjugate acid-base pairs.HNO^3 + H2O<-->H3O + NO^3?
  • identify the element from the following four quantum numbers:?
  • Identify the hybridization of the carbon atom(s) in H2CO?
  • identify the hybridization of the carbon atom(s) in Cl2CO?
  • Identify the hybridization of the central atom for both?
  • Identify the hybridization of the central atom for both?
  • Identify the hybridization of the central atoms?
  • Identify the metal?
  • Identify the type of reaction?
  • identifying buffer solutions...?
  • Identifying this metal!!? wwhat?!?
  • identity of the gas & balanced equations?
  • If Alcohol concentration is more than 20% then Alcohol absorption in the body became less, why?
  • If 0.150 mol of KOH is dissolved in 500 mL of water, what are [OH-] and [H^3O+]?
  • If 1.00L of water is added to 3.00L of a 6.00M solution of HCl,what is new molaritey of acid solution??
  • If 1.17 10-3 mol argon occupies a 72.5 mL container at 44°C, what is the pressure (in torr)?
  • if 1.936g of BaCl2.xH2Ogives 1.864g of anhydrous BaSO4upon treatment with sulfuric acid, calculate value of x?
  • If 100 people in a confined room farted at once, and someone lit a match, what would happen?
  • If 1dm^3 of water is just capable of oxidising completely 6.0mg CH2O, calculate its oxygen content?
  • If 2 Litres of hot water at 90 C is added to 4 Litres of cold water at 10 C , What is the final Temreture?
  • If 2.335g of potssium dicromate is disolved in enough water to make exactly 500ml what is the molarity of...?
  • If 20 L of carbon monoxide weigh 28g, and 20 L of oxygen weigh 32g, how much would 20 L of carbondioxide weigh
  • If 25.0 grams of potassium chlorate decomposes, how many grams of gas are released as a product?
  • If 25g of Sodium Hydroxide react with Calcium. how many grams of sodium will be produced?
  • If 26.07 mL of a standard 0.1650 M NaOH solution is required to neutralize 39.29 mL of H2SO4?
  • IF 4.0g of H2 are made to react w/ excess CO, how many g of CH3OH can THEORETICALLY be produced according to?
  • If 4.50 mol of silver nitrate reacts, what mass of sodium bromide is required?b.) What mass of silver bromid?
  • If 5.50 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be?
  • If 50 ml of .50M KOH is added to 75 ml of .20M H2SO4, will solution be neutral, acidic, or basic?
  • If 50 mL of 10 degree C water is added to 40 mL of 65 degree C,?
  • If 50.0 dm3 of oxygen is measured at 24.0 degrees Celsius?
  • If 565 mL of oxygen gas is collected at 25oC and 744 mm Hg, what is its volume at 0oC and 760 mm Hg?
  • If 6 g of NaCI is dissolved in 1 L of solution, what percent concentration is prepared?______%?
  • If 7.40 g of Ca(OH)2 is dissolved in H2O to make 100 ml solution, what is OH- concentration of this solution?
  • If 8 grams of mathane makes 6 grams of carbon, how much carbon can 4 grams of methane make?
  • If 800 ml of dry gas @ a barometic pressure of 600 torr & 37C shrinks to 400 ml & 0C dry what is the pressure?
  • if 90.0 grams of sodium is dropped into 80.0 g of water, how many liters of hydrogen at STP would be produced?
  • if a bottle of hydrogen peroxiode is labeled "10 volts" what does it indicate?
  • If a catalyst is added to a system at equilibrium and the temperature remains constant, there willbe no effect
  • If a certain source emits radiation of wavelength 380. nm what is the energy, in kJ, of one mole of photon
  • if a china bowl is warmed to 65.0 C when it absorbs 2.6 kcal heat what is the specific heat of the china dish
  • if a gas is at constant temperature increasing the pressure on it will decrease the volume -- true or false?
  • If a planet were built (earth size) What would / could you use for the core ?
  • If a pure mineral salt is added to pure water, the salt will ionize into?
  • If a reaction forms a precipitate using CO2 gas, is it also possible using carbonate in solution?
  • If a salt with no O2 or H atoms dissociates in solution is it neutral?
  • If a sodium hydroxide solution...?
  • If a solution changed its composition during freezing how would this change the cooling curve?
  • If a solution of hydrochloric acid of pH2 were diluted a thousand fold what would be the resulting solution?
  • if a substance dissolves in H2O, would it be a polar or non polar?explain?
  • if a substance is not water soluable, what might you use as a solvent? explain why you would choose this?
  • If a substance is not water soluble, what might you use as a solvent? Why would you choose this solvent?
  • If a substance undergoes a chemical change, could its volume change?
  • If alcohol is added to a saturated salt solution, what will happen to the "depression of its freezing point"?
  • If all scientific endeavors are for the benefit of mankind then why does controversy exist regarding...?
  • If an animal cell is placed into a solution whose concentration of dissolved substance is higher the cell will
  • if an atom cant have a state of 4+ or 4- then why Fe(iron) has states of 4+ and 6+?
  • If an atom has 43 electrons, 56 neutrons & 43 protons, what is its approx atomic mass & what is it an atom of?
  • If an atom is reduced in a redox reaction, what must happen to another atom in the system?
  • If any, What natural ingredients are found in plastic?
  • If aqueous solutions of ammonium carbonare and copper (II) chloride are mixed, the coefficient dioxide gas in?
  • if chitosan is protonated, which group it will be prototnated?
  • If different masses of Magnesium are used would this change the empirical formula?
  • If dry cleaning fluid is so bad for you ... Why don't dry cleaned clothes make you sick.?
  • If element z has a half-life of one wk and there are 256 particles or whatever, what is the equation?
  • If fish can filter their oxygen from water, how do they expel it as bubbles?
  • If fluorine has an atomic mass of 18.998 and there are isotopes of both fluorine-18 and fluorine-19?
  • If four moles of NH3 react to form two moles ofN2and six moles of H2, calculate Kp at the same temp?
  • If G= RT lnK...then at 0 K, G= 0.does this imply that all reversible reactions are at equilibrium at 0K?
  • If I eat a lot of yogurt, will the bacteria in it make me sick?
  • if i have 1ml of a solution how much diluent do i need to make a 1 in 5 diution?
  • If I have an absorbance of .255 in a solution, how can I find the molarity of salicylic acid?
  • If I melt dry ice can I swim without getting wet?
  • if iodine is found in salt and its color is violet ,then, why is the color of the salt is white?


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