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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]
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 ...
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 ...
For example, Paraffin has very large molecules and thus a high heat capacity per mole, but as a substance it does not have remarkable heat capacity in terms of volume, mass, or atom-mol (which is just 1.41 R per mole of atoms, or less than half of most solids, in terms of heat capacity per atom).
Its usage varies from about 30 to 50 kilograms (65–110 lb) per ton of steel. The quicklime neutralizes the acidic oxides, SiO 2, Al 2 O 3, and Fe 2 O 3, to produce a basic molten slag. [10] Ground quicklime is used in the production of aerated concrete such as blocks with densities of ca. 0.6–1.0 g/cm 3 (9.8–16.4 g/cu in). [10]
Calcium hypochlorite is an inorganic compound with chemical formula Ca(Cl O) 2, also written as Ca(OCl) 2.It is a white solid, although commercial samples appear yellow. It strongly smells of chlorine, owing to its slow decomposition in moist air.
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(HSO 3) 2 Molar mass: 202.22 g/mol Melting point: 203 °C Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F ...