• What is exactly in between 61 and 79?

    7 answers · 1 day ago
  • Whats is n2+n2?

    5 answers · 8 hours ago
  • This is probably a dumb question to ask but can you use chemistry to create a Philosopher stone?

    I'm sorry but I watch alot of Fullmetal Alchemist, I love that series to death and I want to know more about Alchemy. That's what I'm asking this question
    I'm sorry but I watch alot of Fullmetal Alchemist, I love that series to death and I want to know more about Alchemy. That's what I'm asking this question
    13 answers · 4 days ago
  • How does water evaporate?

    How does water evaporate indoors and outdoors? If I'm right... Water has a high boiling point because of its hydrogen bonds. H₂O prefers its liquid form over its gaseous form, so it's much harder to change it to its gaseous form. If so, how does water evaporate then? Every time it does, is it hitting its... show more
    How does water evaporate indoors and outdoors? If I'm right... Water has a high boiling point because of its hydrogen bonds. H₂O prefers its liquid form over its gaseous form, so it's much harder to change it to its gaseous form. If so, how does water evaporate then? Every time it does, is it hitting its boiling point to change from a liquid to a gas? I was just blow drying my hair and aiming the dryer at the foggy mirror and then these thoughts came up so I immediately came to Yahoo Answers afterwards in hopes of an answer. lol :)
    5 answers · 1 day ago
  • Final Pressure??

    A 82.5 g sample of O2 gas at 0.0°C and 5.065 x 104 Pa is compressed and heated until the volume is 2.68 L and the temperature is 27°C. What is the final pressure in Pa?
    A 82.5 g sample of O2 gas at 0.0°C and 5.065 x 104 Pa is compressed and heated until the volume is 2.68 L and the temperature is 27°C. What is the final pressure in Pa?
    4 answers · 6 hours ago
  • Can someone pleaseee tell me why the rate of diffusion is quicker when the concentration of an outside solution is higher.?

    I am studying the rate of diffusion according to the concentration of sulfuric acid in the surrounding solution of a phenolphthalein agar cube and need to know how diffusion is affected by concentration. TIA
    I am studying the rate of diffusion according to the concentration of sulfuric acid in the surrounding solution of a phenolphthalein agar cube and need to know how diffusion is affected by concentration. TIA
    7 answers · 3 days ago
  • What element has 36 neutrons?

    Best answer: Are you sure it's neutrons you're looking for? Krypton has 36 protons and 36 electrons but there is no known element with 36 neutrons. Now Copper Isotope # 2 or ^65Cu has 36 neutrons. Are you allowed to use isotopes?
    Best answer: Are you sure it's neutrons you're looking for? Krypton has 36 protons and 36 electrons but there is no known element with 36 neutrons. Now Copper Isotope # 2 or ^65Cu has 36 neutrons. Are you allowed to use isotopes?
    4 answers · 16 hours ago
  • I Can you check if my answers are right............................

    Best answer: A chemist is testing the quality of a wine produced by a vineyard. Which of the following branches of chemistry might the chemist use? Physical chemistry Inorganic chemistry< (no) Analytical chemistry <=== first Organic chemistry <=== second When you crush a first-aid pack for an injured athlete and the... show more
    Best answer: A chemist is testing the quality of a wine produced by a vineyard. Which of the following branches of chemistry might the chemist use?
    Physical chemistry
    Inorganic chemistry< (no)
    Analytical chemistry <=== first
    Organic chemistry <=== second

    When you crush a first-aid pack for an injured athlete and the pack gets cold, which of the following is true?
    A physical change occurred, with energy being given off.
    A chemical change has occurred, with energy being absorbed. <...<=== correct
    A physical change has occurred, with energy being absorbed.
    A chemical change has occurred, with energy being given off.

    A substance undergoes a change. Which of the following indicates that the change was a chemical change?
    The density of the substance changed
    The substance change shape
    The substance changed state
    The molecules of the substance changed<...<=== correct

    The air temperature surrounding an icy windshield is 0c. the driver turns on the defroster and the ice melts. Which one of the following is true?
    The ice released heat energy to produce a chemical change
    The ice released heat energy to produce a physical change
    The ice absorbed chemical energy to produce a chemical change
    The ice absorbed heat energy to produce a physical change<...<=== correct

    Stacy runs a paper chromatography experiment using the same ink but two different solvents. Using solvent result in the ink separating into three band but solvent b does not carry the ink away from the original spot. Which of the following could explain the results?
    The ink was a mixture but only in solvent A
    The ink was a pure substance and dissolves in both solvents
    Solvent B was not a good mobile phase because It could not dissolve the ink<...<=== correct
    Solvent A was not a good mobile phase because It could not dissolve the ink

    Which of the following is a mixture?
    Water
    Gold ore<...<=== correct
    Table salt
    Graphite

    An unknown substance undergoes a chemical change that gives off heat. Which of the following statements are true?
    The types of molecules of the substance before and after a chemical are the same and the change was endothermic
    The types of molecules of the substance before and after a chemical are different and the change was exothermic
    The types of molecules of the substance before and after a chemical are the same and the change was exothermic< (no)
    The types of molecules of the substance before and after a chemical are different and the change was endothermic...<=== correct

    Which of the following resents an element?
    H2CO3 ........ This is a fictitious compound
    CO< .... no.... compound
    C20 .... C twenty??? ... carbon is an element
    H2O .... compound

    Steve, Sarah, Richard and Kate each run paper chromatography on unknown liquids. Steve gets red band Sarah gets a yellow band and a Red band Richard gets a green band and Kate gets a yellow band and a blue band. Which student might have had a pure substance.
    Steve
    Sarah< .... no
    Kate
    Richard and Steve is the correct answer

    The melting points of canola oil corn oil and sunflower oil and peanut oil are 10 C, -11C 17C and -2C. based on information how might you separate the type of oil from the rest in a mixture of all four
    Cooling a freezer
    Liquid chromatography ... maybe, with the write stationary substrate
    Paper chromatography
    Simple distillation< ... no ........ fractional distillation would be better

    Which of the following is a mixture?
    Salt
    Water
    Soil<...<=== correct
    Sugar

    Which of the following best describes seawater?
    Compound<.... no
    Homogeneous Mixture...<=== correct
    Pure substance
    Heterogeneous mixture

    Which method would you use to separate two grades of gasoline
    Distillation
    Electrolysis
    Filtration
    Gas chromatography< .... no
    Since each grade of gasoline is a mixture composed of up to a hundred or more components, many of which are found in both grades of gasoline, it would be very difficult to separate (read impossible) two grades of gasoline.

    In a paper chromatography chamber, which of the following could be the stationary phase
    Plastic plate
    Air
    Paper< ...<=== correct
    5 answers · 2 days ago
  • Getting water to 105 degrees celsius?

    Boiling water boils because the water wants to escape from the heat in simple terms, but if I were to make a incompressible container, fill it with water, and heat it up, could I theoretically get the water to above 100 degrees celsius? Possibly 125 degrees or even 200 degrees? Or would it still boil, making the... show more
    Boiling water boils because the water wants to escape from the heat in simple terms, but if I were to make a incompressible container, fill it with water, and heat it up, could I theoretically get the water to above 100 degrees celsius? Possibly 125 degrees or even 200 degrees? Or would it still boil, making the insides look like a super dense cloud?
    6 answers · 4 days ago
  • Where can i buy potassium?

    12 answers · 1 week ago
  • Mercury + Electricity = Gold ??

    4 answers · 4 days ago