Arithmetic of Pharmacy

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Page 50 - These reagents in solution are known as volumetric solutions, and ' ' are designated as normal ( y ) when they contain in 1 liter the molecular weight of the active reagent, expressed in grammes, and reduced to the valency corresponding to one atom of replaceable hydrogen or its FIG. 9. equivalent."— USP FIG.
Page 16 - ... the ratio of the ovendry weight of a sample to the weight of a volume of water equal to the volume of the sample at some specific moisture content, as green, air-dry, or ovendry.
Page 17 - Institute,1 is to weigh the sample in air and then in water as quickly as possible, and divide the weight in air by the loss of weight in water.
Page 41 - As an atom is the smallest particle of an element that can enter into combination, this relative weight of oxygen is the least weight with which it can enter into combination.
Page 41 - The 2 atoms of hydrogen weigh 2 parts. 1 atom of sulphur weighs 32 " 4 atoms of oxygen weigh 64 " 98 " The sum is 98. Therefore, the weight of the molecule of sulphuric acid is 98 times greater than the weight of the atom of hydrogen. How the...
Page 16 - ... the loss of weight in the liquid, divided by the loss of weight in the water, will give the specific gravity of the liquid. Let w = the weight of the solid in air, w...
Page 22 - Specific volume may be found by dividing the volume of a given weight of the liquid by the volume of an equal weight of water.
Page 41 - ... all known physical phenomena, besides enabling us to deduce and predict other properties of matter to be verified by observation. Thus Dalton's atomic theory supposes that matter is made up of extremely small (hitherto undivided)* particles called atoms. There are as many different kinds of atoms as of elements. An atom is usually represented by the first letter of the name of the element, or the first two significant letters ; and this " Symbol " always denotes a certain weight called the "...
Page 63 - ... obtained by dividing the weight of a given volume of the gas by the weight of an equal volume of air...
Page 83 - Neon Ne 20.2 Nickel Ni 58.68 Niton (radium emanation) Nt 222 . 4 Nitrogen N 14.01 Osmium Os 190.9 Oxygen O 16.00 Palladium Pd 106.7 Phosphorus P 31.04 Platinum Pt 195.2 Potassium K 39. 10 Praseodymium Pr...

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