• What will a -273.15 C water be like?

    Best answer: much the same as any other ice cube, but colder.
    Best answer: much the same as any other ice cube, but colder.
    5 answers · 2 weeks ago
  • Are most places of an atom void or full of electronic cloud?

    Best answer: cloud of electrons occupies the majority of an atom
    Best answer: cloud of electrons occupies the majority of an atom
    4 answers · 2 weeks ago
  • Is there such thing as "Dicobalt explosives?"?

    At various times in Star Trek shows, people use "dicobalt explosives" as a "high-yield" explosive. I'm interested if there is any scientific truth about this. I tried google, but I'm not a chemist, and the search results were confusing. Can "dicobalt" be used as an... show more
    At various times in Star Trek shows, people use "dicobalt explosives" as a "high-yield" explosive. I'm interested if there is any scientific truth about this. I tried google, but I'm not a chemist, and the search results were confusing. Can "dicobalt" be used as an explosive? Is there more science behind it that can be explained to a layman?
    7 answers · 3 weeks ago
  • CHEMISTRY HELP?

    Best answer: How many moles..... You could use the unit-factor method (aka dimensional analysis), or you could simply apply some common sense. 2H2O(l) --> 2H2(g) + O2(g) 36.g ............... ..........? mol 36.0g H2O x (1 mol H2O / 18.0g H2O) x (1 mol O2 / 2 mol H2O) = 1.0 mol O2 By now you have figured out that this... show more
    Best answer: How many moles.....

    You could use the unit-factor method (aka dimensional analysis), or you could simply apply some common sense.

    2H2O(l) --> 2H2(g) + O2(g)
    36.g ............... ..........? mol

    36.0g H2O x (1 mol H2O / 18.0g H2O) x (1 mol O2 / 2 mol H2O) = 1.0 mol O2

    By now you have figured out that this barely requires any math at all, just a basic understanding of what the balanced chemical equation is telling you. It says that 2 mol of water will produce 1 mol of O2. Since water has a molar mass of 18.0g, 2 moles have a mass of 36 grams. If there half as many moles of O2 as there are moles of H2O, then half of 2 mols of water is 1 mol of O2.
    4 answers · 2 weeks ago
  • What is the volume of 25 g of ethyl alcohol with density of 0.79 g/ml?

    what is the volume of 25 g of ethyl alcohol with density of 0.79 g/ml
    what is the volume of 25 g of ethyl alcohol with density of 0.79 g/ml
    5 answers · 2 weeks ago
  • What Gas Mask should I get and where to buy?

    I need a gas mask. I'm dealing with chemical fumes, I've already bought one gas mask on the cheap and ended up having to go to hospital for poisoning, it wasn't serious but I want to be safe from now on since it did cause me a lot of pain for a few mouths. Where can I get one too? I don't have a... show more
    I need a gas mask. I'm dealing with chemical fumes, I've already bought one gas mask on the cheap and ended up having to go to hospital for poisoning, it wasn't serious but I want to be safe from now on since it did cause me a lot of pain for a few mouths. Where can I get one too? I don't have a lot of money so I don't want to be cheated by buying something overpriced. Buying online is preferred. Thank you.
    8 answers · 3 weeks ago
  • [Chemistry] Why does the mass number equal the total number of protons and neutrons?

    I'm doubtful a little bit about Mass number of atom. I read many Chemistry book and I found the same describing like it told that the mass number equal summation of the number of protons and neutrons. I thought that mass number was the number referring to mass of atom so then, it must be equal to the summation... show more
    I'm doubtful a little bit about Mass number of atom. I read many Chemistry book and I found the same describing like it told that the mass number equal summation of the number of protons and neutrons. I thought that mass number was the number referring to mass of atom so then, it must be equal to the summation of mass of protons and neutrons by the way. So I want to know why when we plus number of protons and neutrons then it will be equal to mass number. (number of protons and neutrons is quantity but it become to mass when sum it. ?!?!?)
    6 answers · 3 weeks ago
  • What will have a bigger explosion. A full cylinder of gasoline or a half filled cylinder with gasoline with vapores inside? Also, why?

    Best answer: If you explode the container somehow, that will cause vaporization (particle dissemination of the liquid into the air) and the eventual fireball will likely be the one with the most fuel. You do need that disseminated fuel (atomized and vaporized fuel) in air to allow the reaction to proceed though, so a filled... show more
    Best answer: If you explode the container somehow, that will cause vaporization (particle dissemination of the liquid into the air) and the eventual fireball will likely be the one with the most fuel. You do need that disseminated fuel (atomized and vaporized fuel) in air to allow the reaction to proceed though, so a filled tank is much less likely to be involved in an explosion/fireball on exposure to flame or high heat.

    This is a surface area limited process. A full tank has effectively no surface area contact with the other required reactant (O2). A half-filled tank will have an O2-containing atmosphere occupying half the tank space and that atmosphere will be close to saturation with fuel vapors. An easy reaction to initiate. No limiting step before the reaction can proceed. The limiting steps have already occurred.

    Obviously if you explode the tank, this will tend to cause volatilization and atomization of the fuel into the surrounding air and then BOOM flame will happen.

    The reason for the rupturing of the containment vessel is an important consideration here. A full tank will not be very likely to have a spontaneous burning that causes rupture. Not enough available reactants. Once the tank blows, though, that stuff is free to burn as a gigantic fireball, but not an explosion exactly (no longer a pressure constraint).
    5 answers · 3 weeks ago
  • Which statement is NOT correct? The coefficients in a chemical equation _______.?

    A. give the ratio of the substances used in the equation B. give the number of molecules that react and are produced in that reaction C. give the number of moles that react and are produced in that reaction D. give the number of grams that react and are produced in that reaction E. None of the Above
    A. give the ratio of the substances used in the equation B. give the number of molecules that react and are produced in that reaction C. give the number of moles that react and are produced in that reaction D. give the number of grams that react and are produced in that reaction E. None of the Above
    6 answers · 3 weeks ago
  • Explain why particles transfer energy to the surroundings during freezing.?

    Best answer: Energy transfer...... Particles transfer energy because, as the kinetic molecular theory indicates: "molecules are in constant random motion." The collisions between molecules transfer energy. If the molecules are at a constant temperature, then some molecules speed up and some slow down, but the total... show more
    Best answer: Energy transfer......

    Particles transfer energy because, as the kinetic molecular theory indicates: "molecules are in constant random motion." The collisions between molecules transfer energy. If the molecules are at a constant temperature, then some molecules speed up and some slow down, but the total energy stays the same.

    But if one group of molecules is at a lower temperature and one group of molecules is at a higher temperature, then the collisions will result in net transfer of energy from those at the higher temperature to those at the lower temperature until thermal equilibrium is attained (when temperature is constant).
    4 answers · 3 weeks ago
  • Will chemistry be hard in high school?

    Will chemistry be hard if algebra is something you failed and or what
    Will chemistry be hard if algebra is something you failed and or what
    9 answers · 3 weeks ago
  • Food or drinks that taste like metal/blood?

    Okay first off I have to say I don't think I am a vampire nor have I ever had a vampire phase. Its just since I was real young I've liked the taste of blood. I've never drank anyone else's nor have a drunk a whole bunch just like at most 3 drops. The problem is that I have scars from opening my... show more
    Okay first off I have to say I don't think I am a vampire nor have I ever had a vampire phase. Its just since I was real young I've liked the taste of blood. I've never drank anyone else's nor have a drunk a whole bunch just like at most 3 drops. The problem is that I have scars from opening my wounds to drink some of my blood. I absolutely know this is weird so y'all don't have to worry about that. I assume it would be something with lots of iron? Again its just the metallic taste that I like. Probably started when I shoved pennies in my mouth as a kid.
    5 answers · 3 weeks ago
  • ATOMIC WEIGHT CHEM QUESTION? EASY 10 POINTS?

    Best answer: One percent is one hundredth. I suggest that you convert the percents to decimals. To determine the mass of each isotope, multiply the mass of the isotope by the decimal. The sum of these numbers is the average atomic weight of this naturally occurring element. #1 = 46.972 * 0.69472 #2 = 48.961 * 0.21667 #3 =... show more
    Best answer: One percent is one hundredth. I suggest that you convert the percents to decimals. To determine the mass of each isotope, multiply the mass of the isotope by the decimal. The sum of these numbers is the average atomic weight of this naturally occurring element.

    #1 = 46.972 * 0.69472
    #2 = 48.961 * 0.21667
    #3 = 49.954 * 0.088610
    Sum = 46.972 * 0.69472 + 48.961 * 0.21667 + 49.954 * 0.088610

    average atomic weight is 47.667 amu. I hope this is helpful for you.
    4 answers · 3 weeks ago
  • Chemistry Help!!?

    Best answer: N2 + 3 H2 → 2 NH3

    (3.08 × 10^-4 g H2) / (2.01588 g H2/mol) × (2 mol NH3 / 3 mol H2) × (6.022 × 10^23 molecules/mol) = 6.13 × 10^19 molecules
    Best answer: N2 + 3 H2 → 2 NH3

    (3.08 × 10^-4 g H2) / (2.01588 g H2/mol) × (2 mol NH3 / 3 mol H2) × (6.022 × 10^23 molecules/mol) = 6.13 × 10^19 molecules
    4 answers · 3 weeks ago
  • Chemistry Help Please.?

    Best answer: . Temperature in this case is the absolute temperature Pressure Law: Constant Volume P/T = k P₁/T₁ = P₂/T₂ Boyle’s Law: Constant Temperature PV = k P₁V₁ = P₂V₂ Charles’ Law: Constant Pressure V/T = k V₁/T₁ = V₂/T₂ ( i ) constant volume P₁/T₁ = P₂/T₂ ; Doubling absolute temperature would double the... show more
    Best answer: .
    Temperature in this case is the absolute temperature

    Pressure Law: Constant Volume
    P/T = k
    P₁/T₁ = P₂/T₂

    Boyle’s Law: Constant Temperature
    PV = k
    P₁V₁ = P₂V₂

    Charles’ Law: Constant Pressure
    V/T = k
    V₁/T₁ = V₂/T₂

    ( i ) constant volume
    P₁/T₁ = P₂/T₂ ; Doubling absolute temperature would double the pressure
    25℃ = (25 + 273 ) K = 298K
    50℃ = (50 + 273 ) K = 323K
    but 323K is not twice 298K so choice A is incorrect
    P₂ = T₂( P₁/T₁ )
    P₂ = (T₂/ T₁ ) P₁
    P₂ = ( 323/298) P₁
    P₂ = 1.08 P₁


    ( ii ) constant temperature
    P₁V₁ = P₂V₂ ; Doubling the volume would halve the pressure; so choice B is incorrect
    P₂ = P₁V₁ / V₂
    P₂ = P₁V₁ / ( 2V₁ )
    P₂ = ½P₁

    ( iii ) constant temperature
    P₁V₁ = P₂V₂ ; Halving the volume would double the pressure; so choice C is correct
    P₂ = P₁V₁ / V₂
    P₂ = P₁V₁ / ( ½V₁ )
    P₂ = 2P₁

    ANSWER:
    C.
    4 answers · 3 weeks ago
  • How hot would fire have to be to burn wood and bone to ash in seconds?

    Best answer: It's not a question of just temperature. A breath of ten billion degrees would not be enough, if it was only a few milligrams. A breath of 600 C would be more than enough, if it was a very large amount and supersonic. In any case, it would have to be over 572 C, the "flash point" (auto-ignition) for... show more
    Best answer: It's not a question of just temperature. A breath of ten billion degrees would not be enough, if it was only a few milligrams. A breath of 600 C would be more than enough, if it was a very large amount and supersonic. In any case, it would have to be over 572 C, the "flash point" (auto-ignition) for most woods. Plus a bunch extra, because the room-temperature wood cools down the dragon fire.

    If the dragon fire was something like napalm, then 10 kg (22 pounds) of dragon fire at 1200 C would reduce 10 kg of wood "in seconds". That about the upper limit of normal napalm, but when you add some magic ...
    5 answers · 3 weeks ago