Vapour-density sentence example

vapour-density
  • Biltz (Ber., 1888, 21, p. 2013; 1901, 34, p. 2490) showed that the vapour density decreased with the temperature, and also depended on the pressure.
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  • It fuses at 415° C. and under ordinary atmospheric pressure boils at 1040° C. Its vapour density shows that it is monatomic. The molten metal on cooling deposits crystals belonging to the hexagonal system, and freezes into a compact crystalline solid, which may be brittle or ductile according to circumstances.
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  • Its vapour-density at 900° C. corresponds to ZnC1 2.
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  • This subject owes its importance in modern chemistry to the fact that the vapour density, when hydrogen is taken as the standard, gives perfectly definite information as to the molecular condition of the compound, since twice the vapour density equals the molecular weight of the compound.
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  • The vapour density is calculated by the following formula: D - W(1 +at) X587,780 (p-s) V in which W =weight of substance taken, V =volume of air expelled, a= 1/273 = .003665, t and p = temperature and pressure at which expelled air is measured, and s= vapour pressure of water at 1°.
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  • For higher temperatures the bulb of the vapour density tube is made of porcelain or platinum, and is heated in a gas furnace.
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  • It has the exact vapour-density corresponding to the formula.
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  • This fact, coupled with the determination of the vapour density of the gas, establishes the molecular formula CO.
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  • Its vapour density is 3.46 (air = I).
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  • Its Vapour Density Is 2.1046 (Air= I).
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  • Meyer (Be y ., 1880, 1 3, p. 394), who found that the change of colour was accompanied by a change of vapour density.
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  • That orthoboric acid is a tribasic acid is shown by the formation of ethyl orthoborate on esterification, the vapour density of which corresponds to the molecular formula B(0C2H5)3; the molecular formula of the acid must consequently be B(OH) 3 or H 3 B0 3.
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  • In the vapour pressure equation p - p' = Pa/p, we have the vapour density equal to M/v 1, where M is the molecular weight of the solvent.
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  • Its vapour density at temperatures above 750 corresponds to the formula AlCl 3 j below this point the molecules are associated.
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  • Now, in this case, the first definition expresses much better the whole chemical behaviour of ozone, which is that of "energetic" oxygen, while the second only includes the fact of higher vapour-density; but in applying the first definition to organic compounds and calling isobutylene "butylene with somewhat more energy" hardly anything is indicated, and all the advantages of the atomic conception - the possibility of exactly predicting how many isomers a given formula includes and how you may get them - are lost.
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  • Its vapour density has been determined by Nilson and Pettersson, and corresponds to the molecular formula BeC12.
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  • It melts at 248° and boils at 275.6°; the vapour density corresponds to the above formula.
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  • It melts at below red heat to a brown mass, and its vapour density at both red and white heat corresponds to the formula Cu 2 C1 2.
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  • Its vapour density has been determined at 2000°, and corresponds to a monatomic molecule.
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  • The vapour density at about 1400° is 230, i.e.
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  • It fuses at a red-heat, and volatilizes at a yellow-heat; its vapour density at 1300°-1400° corresponds to the formula FeC12.
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  • The vapour density is 10.6 (air =1) at 564° C., corresponding to a tetratomic molecule As; at a white heat the vapour density shows a considerable lowering in value, due to the dissociation of the complex molecule.
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  • At 524° Dumas deduced the structure S6 from vapour-density determinations, whilst for the range 860 0 to 1040 0, Sainte-Claire Deville and Troost deduced the formula S2.
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  • His terminology was vague and provoked caustic criticism from Berzelius; he assumed that all molecules contained two atoms, and consequently the atomic weights deduced from vapour density determinations of sulphur, mercury, arsenic, and phosphorus were quite different from those established by gravimetric and other methods.
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  • It fuses at 415° C. and under ordinary atmospheric pressure boils at 1040° C. Its vapour density shows that it is monatomic. The molten metal on cooling deposits crystals belonging to the hexagonal system, and freezes into a compact crystalline solid, which may be brittle or ductile according to circumstances.
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  • Its vapour-density at 900° C. corresponds to ZnC1 2.
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  • The vapour density is calculated by the following formula: D - W(1 +at) X587,780 (p-s) V in which W =weight of substance taken, V =volume of air expelled, a= 1/273 = .003665, t and p = temperature and pressure at which expelled air is measured, and s= vapour pressure of water at 1°.
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  • Its vapour density agrees with the molecular formula C302, and this formula is also confirmed by exploding the gas with oxygen and measuring the amount of carbon dioxide produced (see Ketenes).
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  • It melts at 248° and boils at 275.6°; the vapour density corresponds to the above formula.
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  • Its vapour density has been determined at 2000°, and corresponds to a monatomic molecule.
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  • The vapour density at about 1400° is 230, i.e.
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  • It fuses at a red-heat, and volatilizes at a yellow-heat; its vapour density at 1300°-1400° corresponds to the formula FeC12.
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  • The vapour density is 10.6 (air =1) at 564° C., corresponding to a tetratomic molecule As; at a white heat the vapour density shows a considerable lowering in value, due to the dissociation of the complex molecule.
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