A. a solvent
B. an anti freezing agent
C. a substitute for petrol
D. for denaturing of ethyl alcohol
A. H2S2O3
B.H2SO8
C. H2S4O6
D. H2 S2 O6
A. molecules become more disordered.
B. K.E of the molecules decreases
C. intermolecular forces become weaker.
D. molecules move more frequently.
A. The nature of its oxides
B. The charge on its ions
C. The formula of its oxide
D. Its number of isotopes
A. common ion effect
B. solubility product
C. dissociation constant
D. dissociation constant for an acid
A. Z
B. T
C. Tn
D. W
Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74. The name tungsten comes from the former Swedish name for the tungstate mineral scheelite, tung sten or “heavy stone”.
A. Alkali metal
B. Alkaline earth metal
C. Elements from Li to Ne
D. Halogens