• Is water wet?

    19 answers · 6 days ago
  • The organic compound of soil is called?

    4 answers · 2 days ago
  • Will chemical reactions create energy and do work?

    Best answer: there is no creation of energy. it gets moved around but not made or destroyed. Work is one way that energy can be transferred, and some chemical reactions do involve the application of work.
    Best answer: there is no creation of energy. it gets moved around but not made or destroyed. Work is one way that energy can be transferred, and some chemical reactions do involve the application of work.
    6 answers · 4 days ago
  • Why does Styrofoam always feel warm to the touch?

    Best answer: Styrofoam is a bad conductor of heat. When you hold it, the surface of the Styrofoam approaches the temperature of your hand because the heat is not conducted away quickly. In other words, it will not suck in the heat like other materials do, so when you hold it, very little heat leaves your hand.
    Best answer: Styrofoam is a bad conductor of heat. When you hold it, the surface of the Styrofoam approaches the temperature of your hand because the heat is not conducted away quickly. In other words, it will not suck in the heat like other materials do, so when you hold it, very little heat leaves your hand.
    7 answers · 4 days ago
  • What ever happened to the popularity of the drug LSD?

    Best answer: in recent years it's had some resurgence in popularity, in very small doses (very small relative to doses hedonistic trippers take so they can "see things" that is), because apparently there may be some psychological benefit from it. which may very well be the case. it's obviously an extremely... show more
    Best answer: in recent years it's had some resurgence in popularity, in very small doses (very small relative to doses hedonistic trippers take so they can "see things" that is), because apparently there may be some psychological benefit from it. which may very well be the case.

    it's obviously an extremely dangerous drug for any illicit user, mainly because of technical difficulty of ensuring the extremely tiny doses required (for any purpose, clinical or recreational) aren't made accidentally high enough, while making it, to cause serious problems for whoever takes it. which wouldn't be a real big problem for legitimate manufacturers of course, but most black market users can't necessarily rely on the "skillz" of whoever made the stuff they're taking can they. let alone know that what they're taking is even really acid in the first place
    4 answers · 3 days ago
  • Is lightning a material?

    7 answers · 1 week ago
  • HELP calculate the wavelength of the yellow light emitted by a sodium lamp, in meters, if the frequency of the radiation is 5.10 x 1014/sec?

    Best answer: You cannot determine the wavelength of a photon of specified frequency unless you also specify the medium through which the photon is traversing. The propagation speed of light varies in different media. In a vacuum, it is "c" = 2.998 * 10^8 m/sec, but in other media, the propagation speed is lower. ... show more
    Best answer: You cannot determine the wavelength of a photon of specified frequency unless you also specify the medium through which the photon is traversing. The propagation speed of light varies in different media. In a vacuum, it is "c" = 2.998 * 10^8 m/sec, but in other media, the propagation speed is lower. Tell your teacher he/she writes sloppy questions.

    In general, for any wave, the wavelength (λ) and frequency (f) are related by:

    f*λ = c

    where c is the propagation speed of the wave in the relevant medium.

    For light propagating in a vacuum, c = 2.998 * 10^8 m/s, so a photon with frequency of 5.10*10^14/sec would have a wavelength of:

    λ = (2.998 * 10^8 m/s)/( 5.10*10^14/sec) = 5.88 *10^(-9) m = 588 nm

    This same photon propagating in water, for which the speed of light is 1.33 times less (more or less -- it depends on the frequency) than the propagation speed in a vacuum would be:

    λ = ((2.998 * 10^8 m/s)/1.33)/( 5.10*10^14/sec) = 4.42 *10^(-9) m = 442 nm

    Clearly, this wavelength is quite different from the case of light propagating in a vacuum. (So you should really rub your teacher's nose in her/his lack of specificity. <g>)


    In general, for the frequencies covering the range of visible light, the propagation speed of light through a medium relative to the speed in a vacuum is characterized by the "refractive index" of the medium, "n":

    refractive index = n = (speed of light in a vacuum)/(speed of light in the medium).

    For nearly all media (but not the vacuum), the speed of light varies as a function of frequency, so the refractive index is also a function of the frequency of the light. This variation of speed with frequency (or, equivalently, energy) is called "dispersion".
    4 answers · 5 days ago
  • Failing college chemistry?

    I study hard in chemistry, review my notes all the time, regularly revise, watch videos to help understand the topics, and feel really confident before tests and exams but still fail!!!!! What's wrong with me!
    I study hard in chemistry, review my notes all the time, regularly revise, watch videos to help understand the topics, and feel really confident before tests and exams but still fail!!!!! What's wrong with me!
    11 answers · 2 weeks ago
  • How many bath bombs can I use at once?

    4 answers · 6 days ago
  • Which is warmer 1 or -3?

    7 answers · 1 week ago
  • A student carried out a similar experiment but used a hydrate of cobalt(II) chloride, CoCl2 x n H2O in an attempt to find the value of n.?

    Best answer: Mass H2O lost = 5.125 g - 2.797 g = 2.328 g H2O
    Moles H2O lost = 2.328 g / 18.0 g/mol = 0.129 mol H2O

    Moles CoCl2 (anhydrous) = 2.797 g / 129.84 g/mol = 0.0215 mol

    n = moles H2O / moles CoCl2 = 6
    Best answer: Mass H2O lost = 5.125 g - 2.797 g = 2.328 g H2O
    Moles H2O lost = 2.328 g / 18.0 g/mol = 0.129 mol H2O

    Moles CoCl2 (anhydrous) = 2.797 g / 129.84 g/mol = 0.0215 mol

    n = moles H2O / moles CoCl2 = 6
    4 answers · 7 days ago
  • How many C atoms are present in the sample of C3H8 with mass 7.41 g? Avogadro’s number is 6.022 × 1023.?

    Best answer: The compound is propane. The first step is to determine the mass of one mole of propane. Mass = 3 * 12 + 8 = 44 grams Let’s determine the number of moles of propane. n = 7.41 ÷ 44 This is approximately 0.168. Each mole of propane contains three moles of carbon, n = 22.23 ÷ 44 To determine the number of carbon... show more
    Best answer: The compound is propane. The first step is to determine the mass of one mole of propane.

    Mass = 3 * 12 + 8 = 44 grams
    Let’s determine the number of moles of propane.
    n = 7.41 ÷ 44

    This is approximately 0.168. Each mole of propane contains three moles of carbon,
    n = 22.23 ÷ 44
    To determine the number of carbon atoms, multiply the number of moles by Avogadro’s number.

    N = (22.23 ÷ 44) * 6.022 * 10^23
    This is approximately 3.04 * 10^23 carbon atoms. I hope this is helpful for you.
    4 answers · 7 days ago