қос вольфрамды карбид

MgB 2 A crystalline intermetallic compound, produced as a black powder, that becomes superconducting at the unusually high temperature of 39 K (_389_F; _234_C); melts at 800 _C. ...

кремний тетрахлориді

化学; 无机化学

SiCl 4 A clear, corrosive, fuming liquid with suffocating aroma; decomposes in water and alcohol; boils at 57.6_C; used in warfare smoke screens, to make ethyl silicate and ...

цинк бораты

化学; 无机化学

3ZnO_2B 2 O 3 A white, amorphous powder that is soluble in dilute acids, slightly soluble in water; melts at 980_C; used in medicine, as a ceramics flux, as an inhibitor for ...

кобальттық нитрат

化学; 无机化学

Co(NO 3 ) 2 _6H 2 O A red crystalline compound with a melting point of 56_C; soluble in organic solvents; used in sympathetic inks, as an additive to soils and animal feeds, and ...

цианды сынап

化学; 无机化学

Hg(CN) 2 Poisonous, colorless, transparent crystals that darken in light, decompose when heated; soluble in water and alcohol; used in photography, medicine, and germicidal ...

натрий карбонаты

化学; 无机化学

Na 2 CO 3 A white, water-soluble powder that decomposes when heated to about 852_C; used as a reagent; forms a monohydrate compound, Na 2 CO 3 _H 2 O, and a decahydrate ...