Hydrogen Flashcards
% of hydrogen in the universe?
70
% of H in the atmosphere? % of H on Earth?
0.15, 15.4
What did Harold C. Urey win a Nobel Prize for? What year?
In the year 1934, an American scientist, Harold C. Urey, got Nobel Prize for separating hydrogen isotope of mass number 2 by physical methods.
% of deuterium? Half life of tritium?
0.0156, 12.33 years
Internuclear distance of H and D?
The same
High purity H2 is produced by?
Electrolyzing warm aqueous Ba(OH)2 with nickel electrodes
Water gas/ syngas is?
CO + H2
How is CO2 removed in water gas shift reaction?
sodium arsenite
Which bond has the highest for a single bond between two atoms of any element?
H-H
0.081% of H2 is dissociated at _____K and 95.5% of H2 dissociates at _____K
2000K, 5000K
CO + H2 ——-> CH3OH. What’s the catalyst?
Cobalt
Metallic hydrides electric conductivity?
Not as good as the parent metals
Lattices of which elements maintain same lattice when forming hydrides?
Ni, Pd, Ce, Ac
Does PH5 exist?
NO
What’s higher for H2O than D2O
Dielectric constant
