Compound empirical formulas

Tables of equivalence 9.1 Inorganic compounds Empirical formulae/Names ... 

Compound Empirical Formula Molecular Weight Boiling Point r cr Vapor Pressure (torr) for Crystalline Solid at 20 °C ... 

Molecular formula elemental symbols with subscripts denote the composition of a compound Empirical formula subscripts denote the relative elemental composition... 

Formulas describe the composition of compounds. Empirical formulas give the mole ratio of the various elements. However, sometimes different compounds have the same ratio of moles of atoms of the same elements. For example, acetylene, C2H2, and benzene, CeHe, each have 1 1 ratios of moles of carbon atoms to moles of hydrogen atoms. That is, each has an empirical formula CH. Such compounds have the same percent compositions. However, they do not have the same number of atoms in each molecule. The molecular formula is a formula that gives all the information that the empirical formula gives (the mole ratios of the various elements) plus the information of how many atoms are in each molecule. In order to deduce molecular formulas from experimental data, the percent composition and the molar mass are usually determined. The molar mass may be determined experimentally in several ways, one of which will be described in Chap. 12. 

Compound Empirical formula Molecular weight From mp (X) bp ro Solubility in water... 

Compound Empirical formula Melting point (°C) [[Pg.237]

Formulas describe the composition of compounds. Empirical formulas give the mole ratio of the various elements. However, sometimes different compounds have the same ratio of moles of atoms of the same elements. For example, acetylene, C2H2, and benzene, C Hg, each have 1 1 ratios of moles of carbon atoms to moles of hydrogen atoms. Such com-... 

There are two broad classes of formulas for compounds empirical formulas and molecular formulas. The empirical formula shows the simplest ratio of elements in a compound and uses the smallest possible set of subscript numbers. Empirical formulas are also called simple formulas. The formulas of a// ionic compounds are empirical formulas. Since ionic compounds do not exist as molecules, their formulas are not molecular formulas. The formulas calculated from percent composition data are empirical formulas. (We ll get to these calculations later.)... 

Peak Compound Empirical Formula Target Ions... 

Compound Empirical formula Molecular formula in the vapor... 

Compound Empirical formula Moles of AgCI precipitated per mole on treatment with AgNOs Number of ions in solution per PtClz... 

There appear to be neither short nor comprehensive Gmehn-type reviews devoted entirely to rare earth borates. Metal borates have been treated in some recent reviews emphasizing d-block elements, however (Farmers, 1982). The nomenclature of borates, as well as that of many other oxoanion compounds capable of different stoichiometries, is confusing and partially contradictory. For instance, R2O3 3B2O3 is called metaborate because the formula can be written R(B02)3, yet the structural data available indicate it to be hexaborate. In the present review, in order to facilitate comparisons between different compounds, empirical formulae based on stoichiometry are preferred to names the generally accepted name orthoborate, which is not contradictory to the structural formula, is used, however. 

Compound Empirical Formula Molecular Formula Molar Mass (g) Integer x Empirical Formula Integer x Empirical Formula Mass... 

---