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Mass-dependent differences in calcium isotope composition are conventionally expressed by the ratio of two isotopes (usually 44 Ca/ 40 Ca) in a sample compared to the same ratio in a standard reference material. 44 Ca/ 40 Ca varies by about 1- 2‰ among organisms on Earth. [33]
It has the formula Ca(C 2 H 3 O 2) 2. Its standard name is calcium acetate, while calcium ethanoate is the systematic name. An older name is acetate of lime. The anhydrous form is very hygroscopic; therefore the monohydrate (Ca(CH 3 COO) 2 •H 2 O) is the common form.
For example, water has a molar mass of 18.0153(3) g/mol, but individual water molecules have molecular masses which range between 18.010 564 6863 (15) Da (1 H 2 16 O) and 22.027 7364 (9) Da (2 H 2 18 O). The distinction between molar mass and molecular mass is important because relative molecular masses can be measured directly by mass ...
Calcium hydroxide is modestly soluble in water, as seen for many dihydroxides. Its solubility increases from 0.66 g/L at 100 °C to 1.89 g/L at 0 °C. [8] Its solubility product K sp of 5.02 × 10 −6 at 25 °C, [1] its dissociation in water is large enough that its solutions are basic according to the following dissolution reaction:
The molecular mass and relative molecular mass are distinct from but related to the molar mass. The molar mass is defined as the mass of a given substance divided by the amount of the substance, and is expressed in grams per mol (g/mol). That makes the molar mass an average of many particles or molecules (potentially containing different ...
Ca(CN) 2 Molar mass: 92.1128 g/mol Appearance white powder Odor: hydrogen cyanide: Density: 1.853 (20 °C) Melting point: 640 °C (1,184 °F; 913 K) (decomposes)
Ca 3 (PO 4) 2 Molar mass: 310.18 g/mol Appearance White Solid Odor: Odorless Density: 3.14 g/cu cm [1] Melting point: ... (Ca 2+) together with inorganic phosphate ...
Ca O 2: Molar mass: 72.076 g·mol −1 Appearance white or yellowish powder Odor: odorless Density: 2.91 g/cm 3: ... It is the peroxide (O 2 2−) salt of Ca 2 ...