Answer:
The element that glows in signs is xenon.
Explanation:
Xenon is a chemical element with the symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas found in Earth's atmosphere in trace amounts. Xenon is used in flash lamps, arc lamps, and as a general anesthetic. Xenon emits a blue or lavenderish glow when excited by electrical discharge, it emits a band of emission lines that span the visual spectrum, but the most intense lines occur in the region of blue light, producing the coloration.
Should be B. An extended period of rain
Answer:
71.8%
Explanation:
The percent yield of a process or a chemical reaction is calculated as:
percent yield = actual yield/theoretical yield x 100%
From the problem we have:
theoretical yield = 3.9 kg
actual yield = 2.8 kg
Thus, we calculate the yield of H₂SO₄ production as follows:
percent yield = (2.8 kg/3.9 kg) x 100 = 71.79 % ≅ 71.8%
Answer:
Molecules of matter such as liquid, gas and solid still move even if the energy is transferred because it isn't a hundred percent. There is still energy and the time it took to transfer that said energy would have changed its state of matter.
Explanation:
Solid -the molecules are tight together. (touching)
Liquid - the molecules are close but not touching about mid way(not to far not to close)
Gas- the molecules in gasses are far apart.
It almost always goes from solid to liquid to gas. but in extreme conditions it could be different.
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