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Sodium dichromate is the inorganic compound with the formula Na 2 Cr 2 O 7. However, the salt is usually handled as its dihydrate Na 2 Cr 2 O 7 ·2 H 2 O . Virtually all chromium ore is processed via conversion to sodium dichromate and virtually all compounds and materials based on chromium are prepared from this salt. [ 1 ]
Units of solubility are given in grams of substance per 100 millilitres ... Barium oxalate dihydrate: BaC 2 O 4 ·2H 2 O: 0.003: ... Sodium dichromate: Na 2 Cr 2 O 7 ...
Molar mass: 115.994 g mol −1 and ... The dichromate ion is a somewhat weaker base than the chromate ion: [5] ... mainly sodium dichromate, were produced in 1985. [8]
The molar mass of atoms of an element is given by the relative atomic mass of the element multiplied by the molar mass constant, M u ≈ 1.000 000 × 10 −3 kg/mol ≈ 1 g/mol. For normal samples from Earth with typical isotope composition, the atomic weight can be approximated by the standard atomic weight [ 2 ] or the conventional atomic weight.
However, one gram of hydrogen reacts with 8 grams of oxygen to give water or with 35.5 grams of chlorine to give hydrogen chloride: hence 8 grams of oxygen and 35.5 grams of chlorine can be taken to be equivalent to one gram of hydrogen for the measurement of equivalent weights. This system can be extended further through different acids and bases.
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
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Molar mass: 424.146 g/mol (dihydrate) ... an insoluble salt with sodium ... depleted uranium have typical specific activity 0.37–0.51 microcuries per gram ...