Chemistry Homework Answers & Questions

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26 results
  • Answered what is the no. of proton in t...
    what is the no. of proton in the element of gold
  • Answered Chem Honors Test
    How electron configuration works.
  • Waiting for answer STEM Learning is Everywhere:...
    Science, technology, engineering, and mathematics (STEM) permeate the modern world. The jobs people do, the foods they eat, the vehicles in which they travel, the information they receive, the medicines they take, and many other facets of modern life are constantly changing as STEM knowledge steadil...
  • Waiting for answer Bell Curve Controversy
    Bell Curve Controversy
  • Waiting for answer 20 cm3of h2so4 reacts with 50...
    20 cm3of h2so4 reacts with 50cm3 of naoh from 1000cm 3 of a solution of naoh . the naoh solution was added 150cm 3 of water and its concentration became 1.12 mol/dm3 after adding to the remainder of naoh left . determine, with working , what was the concentration of HCl in mol/dm3 and g/cm3
  • Answered sucrose decomposes in acid sol...
    sucrose decomposes in acid solution into glucose and fructose according to the first order rate law with half life period equal to 3hr . what fraction od the sample of sucrose remains after 8 hours ?
  • Answered BOS3640 Unit 8
    BOS3640 Unit 8 Question 13 Develop an answer to each of the following explosive related questions, using at least 200 words total for parts a and b. The DOT regulation at 49 C.F.R. 177.835(a) requires shippers and carriers to load and unload explosives from a motor vehicle only when the engine is...
  • Waiting for answer Image of reddish brown Hydriod...
    Image of reddish brown Hydriodic acid.
  • Answered Ethene is converted to ethane...
    Ethene is converted to ethane by the reaction C2H4(g) + H2(g) → C2H6(g) C2H4 flows into a catalytic reactor at 25.0 atm and 300.°C with a flow rate of 1367 L/min. Hydrogen at 25.0 atm and 300.°C flows into the reactor at a flow rate of 1500. L/min. If 11.0 kg of C2H6 are collected per minute,...
  • Answered When a solution of sodium chlo...
    When a solution of sodium chloride reacts with a solution of silver nitrate, a new compound called silver chloride forms. This is insoluble so it forms a cloudy precipitate in the water. Which separation method would you use to obtain a pure sample of the silver chloride. Name the equipment you woul...
  • Answered a bottle of wine contains 750...
    a bottle of wine contains 750 mls of a 12% by volume acohol solution. how much heat would be generated by the oxidation of alcohol to acetate (the density of alcohol is .79 g/ml)
  • Answered an irregularly shaped stone wa...
    an irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 20.0 ml. the height of the water rose to 30.2ml. if the mass of the stone was 25.0g what was its density
  • Answered A book describes a reaction as...
    A book describes a reaction as follows: Methane burns in oxygen to form carbon dioxide and water. What are the reactants in this ?
  • Answered all conversion factors, when i...
    all conversion factors, when in the form of a fraction, must equal ____
  • Answered An iceberg has a volume of 765...
    An iceberg has a volume of 7650 cubic feet. what is the mass of the ice (in kg) composing the iceberg?
  • Answered 96.0 g. of a gas occupies 48.0...
    96.0 g. of a gas occupies 48.0 L at 700.0 mm Hg and 20.0 C. What is its molecular weight?
  • Answered the rate constant a first or...
    the rate constant a first order rection increases from 4x10 ki power-2 to8x10 ki power-2 when the temp. change from 27'c to 37'c calcuate the energy of activation?
  • Answered 5. What is the molar enthalpy...
    5. What is the molar enthalpy of the formation of 1mol H2SO4(l) given the following information? 2H2(g) + O2(g) → 2H2O(g) ΔHrxn = -484kJ 2S(s) + 3O2(g) → 2SO3(g) ΔHrxn = -890kJ H2(g) + 2O2(g) + S(s)→ H2SO4(l) ΔHrxn = -814kJ H2O(g) + SO3(g)→ H2SO4(l) ΔHrxn = xkJ
  • Answered Hydrogen bonding
    Draw a figure showing Hydrogen bonding between 3 ammonia molecules?
  • Answered Chemistry Notes for class 12 E...
    Electrochemistry Importance of Electrochemistry Electrolytes are of two types features of the electrochemical cell Electromotive Force (emf) of a Cell ......
  • Answered Molar concept
    what is Molar concept as define in chemistry?
  • Answered Finding molarity: PLEASE HELP...
    FINDING MOLARITY: - 75.0 mL of an AgNO3 solution reacts with enough Cu to produce 0.250g Ag by single displacement. What is the molarity of the initial AgNO3 solution if Cu(NO3)2 is the other product?
  • Answered balancing equations
    __Fe+__O2______Fe3O4
  • Answered HELP
    A sample of 5.89 grams of NaOH is dissolved into 617 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.11 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? Answer in units of M.
  • Answered Equations
    How do you write a net ionic equation for confirming precipitates?
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