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Chrome alum or Chromium(III) potassium sulfate is the potassium double sulfate of chromium. Its chemical formula is KCr(SO 4 ) 2 and it is commonly found in its dodecahydrate form as KCr(SO 4 ) 2 ·12(H 2 O).
0.17308 g/cm 3 (from 23.1256 cm 3 /mole; at local min. density, from hcp melt at 0.699 K, 24.993 atm) 0.17443 g/cm 3 (from 22.947 cm 3 /mole; He-II at triple point hcp−bcc−He-II: 1.463 K, 26.036 atm) 0.1807 g/cm 3 (from 22.150 cm 3 /mole; He-I at triple point hcp−bcc−He-I: 1.772 K, 30.016 atm) 3 Li lithium; use: 0.512 g/cm 3: CR2 (at m ...
Chromium compounds are compounds containing the element chromium (Cr). Chromium is a member of group 6 of the transition metals. The +3 and +6 states occur most commonly within chromium compounds, followed by +2; charges of +1, +4 and +5 for chromium are rare, but do nevertheless occasionally exist. [3] [4]
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The gram-atom is a former term for a mole of atoms, and gram-molecule for a mole of molecules. [ 7 ] Molecular weight (M.W.) (for molecular compounds) and formula weight (F.W.) (for non-molecular compounds), are older terms for what is now more correctly called the relative molar mass ( M r ). [ 8 ]
Change in volume with increasing ethanol fraction. The molar volume of a substance i is defined as its molar mass divided by its density ρ i 0: , = For an ideal mixture containing N components, the molar volume of the mixture is the weighted sum of the molar volumes of its individual components.
The anhydrous form of chromium(II) acetate, and also related chromium(II) carboxylates, can be prepared from chromocene: 4 RCO 2 H + 2 Cr(C 5 H 5) 2 → Cr 2 (O 2 CR) 4 + 4 C 5 H 6. This method provides anhydrous derivatives in a straightforward manner. [8] Because it is so easily prepared, Cr 2 (OAc) 4 (H 2 O) 2 is a
Chromium(III) sulfide is the inorganic compound with the formula Cr 2 S 3. It is a brown-black solid. It is a brown-black solid. Chromium sulfides are usually nonstoichiometric compounds , with formulas ranging from CrS to Cr 0.67 S (corresponding to Cr 2 S 3 ).