Chemistry

posted by .

A compound on heating gives a crackling sound, a reddish fume, and a gas which relights a glowing splint. the residue is reddish brown when hot and yellow when cold. What are- 1. the compound? 2. the fume 3. the gas
4. the residue?

  • Chemistry -

    Not much to go on here.
    My best guess is
    compound is Hg(NO3)2
    fume is NO2
    gas is NO2 AND O2
    residue is HgO/Hg(NO3)2/Hg mixture although the Hg may be driven off at an elevated temperature.

    HgO is the right color at the two temperatures (hot and cold), NO2 is reddish-brown fume, O2 will relight an extinguished glowing splint.

    Hg(NO3)2 --> HgO + NO2 step 1
    2HgO ==> 2Hg + O2 step 2

  • Chemistry -

    Equetion for reaction Pb(NO3)2----> PbO + O2 + NO2 (1) Pb(NO3)2 (2) NO2 (3) O2 (4) PbO

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Read Y9 chemistry

    4. Lead dioxide gives off a gas when heated. The gas relights a glowing splint. Give the name of this gas. 5. Hydrated cobalt chloride are dark red crystals. Give twoobservations you would make (what you would see) when these crystals …
  2. Chemistry

    why shold you heat the evaporating dish containing the contents to fume hood. Why should the content be heated in the fume hood.
  3. Chemistry

    why should heating a content containing Zn and HCl be heated in fume hood.
  4. chemistry

    potassium-a metal that catches fire whet it reacts with water, chlorine-a green poisonous gas bromine-a reddish brown liquid lithium-the least reactive of the alkali metals neon-an nonreactive gas iron-a metal with very high melting …
  5. Chemistry

    A compound F on heating give a cracking sound and G give a reddish brown fumes when hot, and yellow when cool, and a gas H light a glowing splint and a residue J. Identify F,G,H,J. What is the name of that crack sound and the name …
  6. Science

    You paint a reddish brown board yellow.Have any properties of the wood changed?
  7. Science (ASAP)

    You paint a reddish brown board yellow.Have any properties of the wood changed?
  8. chemistry

    A student added some bromine (reddish orange) in some carbon tertra chloride ro a sample of butane in a test tube and placed it in a dark cupboard. When the student removed the test tube it still had the reddish orange colour. When …
  9. Chemistry

    A student added some bromine (reddish orange) in some carbon tertrachloride to a sample of butane in a test tube and placed it in a dark cupboard. When the student removed the test tube it still had the reddish orange colour. When …
  10. chemistry

    which acid produces brown fume on heating?

More Similar Questions