• Did I get poisoned by cyanide?

    I was eating something then all of a sudden I get a bad tasting burning sensation in my mouth.. I wash it out.. and search up what could cause that and apparently cyanide has the same chrateristics so I'm panicking.. :/
    I was eating something then all of a sudden I get a bad tasting burning sensation in my mouth.. I wash it out.. and search up what could cause that and apparently cyanide has the same chrateristics so I'm panicking.. :/
    13 answers · 1 week ago
  • Define "red" without naming any other color........?

    Best answer: The color we perceive from photons with a wavelength around 700 nm (nanometres). In this way, even if what your brain calls "red" is different from what my brain call "red" (which could be your "green", for example), we can both agree that if a special light is designed to emit only... show more
    Best answer: The color we perceive from photons with a wavelength around 700 nm (nanometres).

    In this way, even if what your brain calls "red" is different from what my brain call "red" (which could be your "green", for example), we can both agree that if a special light is designed to emit only photons at that wavelength, then whatever our individual brains perceive, THAT is what we should both call "red".

    ---

    Tomatoes can be red, green, yellow, mauve...; not reliable as a standard. When they arrived in Europe (imported from America by the Spaniards), the Italians called them "pomidori" (golden apples). The red hybrids came later.

    Blood is red when iron is the metal that stabilizes the oxygen-bearing cells in the blood AND the cell is carrying oxygen on its way out of the lungs (not on the way back, when it carries CO2 -- it is then bluer). On Earth, land animals -- including ourselves -- have evolved with iron at the core of the "hemoglobin" molecule.
    Some fish don't.
    If is (chemically) possible to have blood where the molecule would use another metal. In Star Trek, Mr. Spock's blood uses copper, and that means his blood is greenish.
    Thus blood (without specifying the species and the location of the sampling) is not reliable.

    Heat is more readily felt from photons of longer wavelength (called infra-red, invisible to the human eye). Also, given enough light, you may feel some heat from lights of colors other than red.

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    A long time ago (mumblety-mumble years ago) I wondered how a [human?] person having evolved for hundreds of generations on a colony planet with a cooler star (around 4000 K instead of the 5400 K of our Sun) would interpret colors if their brain (similar to ours) still used "red, green and blue" as primary interpretations.

    For that, I used Ektachrome film designed for near infra-red photography, and where the processing would lead to color-shifting:
    Blue would become invisible (the use of that film required a yellow filter to prevent blue light from hitting the film)
    Green would show as blue
    Red would show as green
    Near infrared would show as red.

    If we were to converse with that person, we would have to establish what color is called red, and we would insist that it is the 700 nm photon, which, to that person, could look like our green.
    26 answers · 2 weeks ago
  • How many grams of PbCl2 are formed when 25.0 mL of 0.312 M KCl react with Pb(NO subscript 3) subscript 2?

    Best answer: A.

    cxv=n
    0.025 L x 0.312 M = 0.0078 mol KCl
    use stoich to find the mol of Pb(NO3)2
    then use the mol of Pb(NO3)2 to find mol of PbCl2
    mol x g/mol = grams of PbCl2
    Best answer: A.

    cxv=n
    0.025 L x 0.312 M = 0.0078 mol KCl
    use stoich to find the mol of Pb(NO3)2
    then use the mol of Pb(NO3)2 to find mol of PbCl2
    mol x g/mol = grams of PbCl2
    4 answers · 1 week ago
  • Is a solution with [OH-] = 2.3 X 10-5 M acidic/basic/neutral?

    Best answer: To know whether the solution is acidic or basic, you need to find the pH. To find the pH you will need to know the [H+]. 1. Find the [H+] using the ionic product of water (Kw). The equation [H+]= Kw/[OH-] will work for a dilute solution. This comes to 4.3478 * 10^-10 M 2. Use pH = -log[H+]. So the pH is... show more
    Best answer: To know whether the solution is acidic or basic, you need to find the pH. To find the pH you will need to know the [H+].

    1. Find the [H+] using the ionic product of water (Kw). The equation [H+]= Kw/[OH-] will work for a dilute solution. This comes to 4.3478 * 10^-10 M

    2. Use pH = -log[H+]. So the pH is 9.4.
    3. Hence the solution is basic.
    7 answers · 2 weeks ago
  • Is granite countertop a element?

    4 answers · 2 weeks ago
  • Chem Help?

    what is the chemical name for 2NH3?
    what is the chemical name for 2NH3?
    5 answers · 2 weeks ago
  • How many electrons will copper lose in a reaction with a non metal?

    Best answer: Copper compounds.... Copper will lose two electrons to make Cu2+ ions ONLY in aqueous solution, but it doesn't actually lose any electrons when it forms a compound. In most copper compounds the bonds have significant covalent character. The bonds are more covalent than ionic. Cu-O ........... 45% ionic... show more
    Best answer: Copper compounds....

    Copper will lose two electrons to make Cu2+ ions ONLY in aqueous solution, but it doesn't actually lose any electrons when it forms a compound. In most copper compounds the bonds have significant covalent character. The bonds are more covalent than ionic.

    Cu-O ........... 45% ionic character
    Cu-Cl ........... 33% ionic character
    Cu-S ............ 11% ionic character

    Don't confuse the oxidation state of copper with an ionic charge on copper. They aren't the same. In compounds copper is "sharing" electrons rather than "losing" electrons as it forms bonds with nonmetals. Only when the bonds are broken, as when a copper compound dissolves in water, are copper ions (Cu^2+) actually formed.
    5 answers · 2 weeks ago
  • What volume will nitrogen gas take up if its density is 0.0012 g/mL and it has a mass of 2.5 g?

    Can you also round to 2 sig figs?
    Can you also round to 2 sig figs?
    4 answers · 2 weeks ago
  • Can someone please help me with this chemistry question?

    Dimethylhydrazine, the fuel used in the Apollo lunar descent module, has a molar mass of 60.10 g/mol. It is made up of carbon, hydrogen, and nitrogen atoms. The combustion of 3.302 g of the fuel in excess oxygen yields 4.839 g of carbon dioxide and 3.959 g of water. What are the simplest and molecular formulas for... show more
    Dimethylhydrazine, the fuel used in the Apollo lunar descent module, has a molar mass of 60.10 g/mol. It is made up of carbon, hydrogen, and nitrogen atoms. The combustion of 3.302 g of the fuel in excess oxygen yields 4.839 g of carbon dioxide and 3.959 g of water. What are the simplest and molecular formulas for dimethylhydrazine?
    4 answers · 2 weeks ago
  • Ionic equation question - please help?

    Best answer: molecular:
    Al2(SO4)3(aq) + 3 Ba(NO3)2(aq) → 3 BaSO4(s) + 2 Al(NO3)3(aq)

    All ions are "(aq)":
    total ionic:
    2 Al{3+} + 3 SO4{2-} + 3 Ba{2+} + 6 NO3{-} → 3 BaSO4(s) + 2 Al{3+} + 6 NO3{-}

    net ionic:
    3 SO4{2-} + 3 Ba{2+} → 3 BaSO4(s)
    Best answer: molecular:
    Al2(SO4)3(aq) + 3 Ba(NO3)2(aq) → 3 BaSO4(s) + 2 Al(NO3)3(aq)

    All ions are "(aq)":
    total ionic:
    2 Al{3+} + 3 SO4{2-} + 3 Ba{2+} + 6 NO3{-} → 3 BaSO4(s) + 2 Al{3+} + 6 NO3{-}

    net ionic:
    3 SO4{2-} + 3 Ba{2+} → 3 BaSO4(s)
    4 answers · 2 weeks ago
  • Does Sauerkraut contain Alcohol?

    8 answers · 2 weeks ago
  • Which of these metals is the easiest to oxidize?

    a)aluminum b)iron c)gold d)sodium e)lithium
    a)aluminum b)iron c)gold d)sodium e)lithium
    5 answers · 2 weeks ago