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Hydrogen is a
chemical element; it has
symbol H and
atomic number 1. It is the
lightest and most
abundant chemical element in the universe, constituting...
- by the substrate. In
heterogeneous catalysts,
hydrogen forms surface hydrides (M-H) from
which hydrogens can be
transferred to the
chemisorbed substrate...
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Hydrogen peroxide is a
chemical compound with the
formula H2O2. In its pure form, it is a very pale blue
liquid that is
slightly more
viscous than water...
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Hydrogenics is a
developer and
manufacturer of
hydrogen generation and fuel cell
products based on
water electrolysis and proton-exchange
membrane (PEM)...
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Hydrogen gas is
produced by
several industrial methods.
Nearly all of the world's
current supply of
hydrogen is
created from
fossil fuels. Most hydrogen...
-
overcoordinated oxygen, OCO) than are donor-type
hydrogen bonds,
beginning on the same oxygen's
hydrogens. For example,
hydrogen fluoride—which has
three lone pairs...
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Hydrogen sulfide is a
chemical compound with the
formula H2S. It is a
colorless chalcogen-hydride gas, and is toxic, corrosive, and flammable.
Trace amounts...
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Hydrogen cyanide (formerly
known as
prussic acid) is a
chemical compound with the
formula HCN and
structural formula H−C≡N. It is a
highly toxic and flammable...
- The
hydrogen line, 21 centimeter line, or H I line is a
spectral line that is
created by a
change in the
energy state of solitary,
electrically neutral...
- as
acidity or basicity,
historically denotes "potential of
hydrogen" (or "power of
hydrogen"). It is a
logarithmic scale used to
specify the
acidity or...
