Formulae first Green

Heat reagent-grade material for 1 hr at 255-265°C. Cool in an efficient desiccator. Titrate sample with acid to pH 4-5 (first green tint of bromocresol green), boil the solution to eliminate the carbon dioxide, cool, and again titrate to pH 4-5. Equivalent weight is one-half the formula weight. 

F.21 In the following ball-and-stick molecular structures, black indicates carbon, red oxygen, gray hydrogen, blue nitrogen, and green chlorine. Write the empirical and molecular formulas of each structure. Hint It may be easier to write the molecular formula first. 

If Zq — Zpf = 0, the last two terms in (8) vanish and the first Green formula appears in simplified form ... 

Due to the second Green formula it is self-adjoint. In turn, the first Green formula assures us of the validity of the relation... 

As far as = 0, the first Green formula with regard to the operator A = (a implies that... 

Indeed, from the first Green formula (see Chapter 2, Section 3) it follows that... 

This relationship is called the second Green s formula and it represents Gauss s theorem when the vector X is given by Equation (1.98). In particular, letting ij/ — constant we obtain the first Green s formula ... 

Analogously, the Green formula (2.140) and the first relation of (2.146) imply... 

First, we recall two Green formulae. Let D C be a bounded domain with a smooth boundary 7 having the external normal n = (ni,ri2). Consider the following two operators defined on 7 ... 

Via transform of the first summand in (46) by the Green difference formula (8") we find that... 

The table shows the structural formulae of some sulfonamides. Some sulfonamides are antibacterial agents (shown in green in the first column of the table) and some (in the second column, in red) have no antibacterial activity. By examining both sets of structures you can see that the structural fragment that makes sulfonamide active is ... 

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