Answer:
Concentrated sulfuric acid can perform a dehydration reaction with table sugar. After mixing, the color changes from white to brownish and eventually to black. The expansion of the mixture is the result of vaporization of water and CO2 inside the container.
Answer:
Hydrogen bromide, anhydrous appears as a colorless gas with a pungent irritating odor. Corrosive. Heavier than air. Prolonged exposure to fire or intense heat may result in the violent rupture and rocketing of the container. Long-term exposure to low concentrations or short-term exposure to high concentrations can result in adverse health effects from inhalation. Used to make other chemicals and as a catalyst in the manufacture of chemicals. Rate of onset: Immediate Persistence: Minutes to hours Odor threshold: 2 ppm Source/use/other hazard: Chemical manufacturing industry; very corrosive.
Explanation:
HBr
The mesosphere is<span> the layer of the </span>Earth's atmosphere<span> that is directly above the </span>stratosphere<span> and directly below the </span>mesopause<span>. In the mesosphere, </span>temperature<span> decreases as the </span>altitude<span> increases. The upper boundary of the mesosphere is the mesopause, which can be the coldest naturally occurring place on Earth</span><span>[citation needed]</span><span> with temperatures below −143 °C (−225 °F; 130 K). T</span>
Carbon is produced by producers, consumed by consumers, released by consumers, and returned to the air and soil by decomposers.
<span>Metallic bonds consist of the attraction of the free-floating valence electrons (negative) for the (positive) metal ions. These bonds are the force of attraction that hold metal together.A piece of pure metal, such as copper or iron, consists of metal atoms surrounded by mobile valence electrons that are free to drift from one part of the metal to another. Metallic bonds result from the attraction between the free-floating valence electrons and the positively charged metal ions.</span>
