Molar Mass: 121.6338 g/mol 1g=8.22139898613708E-03 mol. Learn how and when to remove this template message, "Atomic weights of the elements 2013 (IUPAC Technical Report)", "Atomic weights of the elements. molar mass and molecular weight. The 1986 Chernobyl nuclear accident contaminated a vast area with 90Sr. Finding Molar Mass. We use the most common isotopes. To complete this calculation, you have to know what substance you are trying to convert. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Only 87Sr is radiogenic; it is produced by decay from the radioactive alkali metal 87Rb, which has a half-life of 4.88 × 1010 years (i.e. Because it is a long-lived high-energy beta emitter, it is used in SNAP (Systems for Nuclear Auxiliary Power) devices. # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (, # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (. Thus, there are two sources of 87Sr in any material: primordial, formed during nucleosynthesis along with 84Sr, 86Sr and 88Sr; and that formed by radioactive decay of 87Rb. of a chemical compound, More information on Strontium Chloride. Strontium(II) Hydrogen Carbonate. Molar Mass: 158.526. This compound is also known as Strontium Hydroxide. In addition to the four stable isotopes, thirty-one unstable isotopes of strontium are known to exist (see Table, below). Molecular weight calculation: 87.62 + (15.9994 + 1.00794)*2 ›› Percent composition by element This page was last edited on 9 October 2020, at 18:02. The alkaline earth metal strontium (38Sr) has four stable, naturally occurring isotopes: 84Sr (0.56%), 86Sr (9.86%), 87Sr (7.0%) and 88Sr (82.58%). The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. This site explains how to find molar mass. It causes health problems, as it substitutes for calcium in bone, preventing expulsion from the body. common chemical compounds. Percent composition (by mass): Element Count Atom Mass % (by mass) Sr 1 87.62 72.04%. more than three times longer than the current age of the universe). Molar mass of Sr(OH)2 = 121.63468 g/mol. Strontium decays into its neighbours yttrium (lower neighbour) and rubidium (upper neighbour). ›› Sr molecular weight. The alkaline earth metal strontium (38 Sr) has four stable, naturally occurring isotopes: 84 Sr (0.56%), 86 Sr (9.86%), 87 Sr (7.0%) and 88 Sr (82.58%). ›› Sr(OH)2 molecular weight. Formula: Sr (OH)2. These relative weights computed from the chemical equation are sometimes called equation weights. Of importance are also strontium-89 (89Sr) with a half-life of 50.57 days. Molar Mass: 209.6537. Isotopic compositions and standard atomic masses from: Half-life, spin, and isomer data selected from the following sources. more than three times longer than the current age of the universe). Use uppercase for the first character in the element and lowercase for the second character. These devices hold promise for use in spacecraft, remote weather stations, navigational buoys, etc., where a lightweight, long-lived, nuclear-electric power source is required. 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