Carbon calculation

C18-0115. One way to remove heavy metal ions from water is by treatment with sodium carbonate. Calculate the mass of the precipitate that will form and the concentration of remaining in solution after 0.750... 

Ratio of microbial biomass to total organic carbon Calculation from individual measures Indicates enrichment of microbial biomass relative to total organic carbon determined in nonstandard laboratory with specialized equipment Rice et al. (1996)... 

Broecker and Li (1970) and Broecker (1974) found that the 14C/12C ratio in the deep ocean was 84 percent of this ratio in the pre-bomb surface ocean. Assuming that surface carbon (dissolved and falling debris) is the only source of deep ocean carbon, calculate the residence time tc of this element in the deep-ocean. The 14C decay constant is 1.2 x 10 4a 1. 

Although it is not known whether this is a dynamic or a static disorder, it is clear from Fig. 2 that the two units result from an inversion at the central carbon, followed by a 180° rotation around the P1-C2 bond. The observation that this carbene has difficulty in maintaining one discrete form in the solid state could well be consistent with the low value for the inversion barrier at carbon, calculated by Hegarty et al.13 (see Section II). 

Definition. The lime requirement of a mineral soil is the number of tonnes of calcium carbonate calculated to raise the pH of a hectare of soil 200 mm deep, under field conditions, to, and maintain at, 6.5. 

C is a cosmogenic nuclide produced in the atmosphere. C is unstable and decays into N with a half-life of 5730 years (Z = 0.00012097 yr ). Assume that the concentration (or activity) of C in the atmosphere is a steady-state concentration that did not vary with time. If the activity of C in a plant tissue 13.56 dpm per gram of carbon, calculate the atomic ratio of " C/C. 

The vap. press, of the three hydrated carbonates calculated from the heats of hydration of anhydrous sodium carbonate furnishes the following relation between the absolute temp. T, and the vap. press, of the soln. in equilibrium with the hydrates indicated by the subscript, when p denotes the vap. press, of water at T° and all the press, are represented in mm. of mercury ... 

In the factory at Aschau [5] 13 m3 boilers were loaded with 1100 kg of pulped nitrocellulose. Nitrocellulose of 11.2-11.6% N was poached for 2-3 hr, whereas nitrocellulose containing 13.2-13.4% N was poached for 5 hr, in water containing 0.25% by weight of sodium carbonate calculated with reference to nitrocellulose. 

Aromatic plus olefinic carbon calculated from H-NMR data (%) Peak 5 1 ratio times 190.6" 30.5 3.8 30.9 25.1... 

The infinite dilution activity scale is useful for ionic equilibria in fresh waters, but for equilibria in sea water one gains precision by applying an ionic medium activity scale. Measuring pH in sea water gives less information than total alkalinity and total carbonate. Calculations on redox equilibria are simplified by introducing the master variable pE -----log e. ... 

The structure of diamond is like the zinc blende structure except that all of the atoms are carbon. Calculate the lattice parameter of diamond if the atomic diameter of carbon is 0.92 nm. 

Figure 10.47. Phanerozoic continental freeboard curve (stippled pattern) of the North American craton (Wise, 1974) compared with generalized Epoch-interval survival rate of cratonic carbonates calculated as mass of carbonate rock in a Series divided by duration of Epoch. (Data from Wilkinson and Walker, 1989.)...

A certain carbohydrate (a compound containing carbon plus hydrogen and oxygen in a 2 1 atom ratio) is 40.0% carbon. Calculate its empirical formula. 

Iron ore is reduced to iron with coke (impure carbon). Calculate the mass of Fe that can be produced from Fc203 with 15.00 kg of carbon. The reaction may be represented as follows ... 

Certainly, there are differences in aqueous models in current use and the carbonate calculations will depend in part on whether the source of carbon data was total alkalinity or total inorganic carbon from Table III. For example, using the program WATEQF and data in ppm from Table III, Table XII compares some computed parameters of the carbonate system of seawater using total alkalinity and total inorganic carbon from Table III. 

Conforma- tion Sym- metry group Dihedral angles ) in Sets of isochronous carbons Calculated relative strain energies in kcal/mole H2) BL3) W ) A8)... 

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