碳水化合物的分子式是( )。 The molecular formula of carbohydrates is ( ). A. C3H5(OOCR)3 B. Cx(H2O)y C. C3H5O2 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: B 复制 纠错
compounds of general formula (1): (1) (am) 2pt or - co - c6h4 - nh2 (p), (c1) n (hcl), n1 (roh) m in which am is a ligand aminico monodentato, chosen in the group of nh3, c1 - c5 - alchilamina linear or branched.c1 - c3 - dialchilamina linear or branched, ciclope...
Data for luciferase assays represent the mean ± SD of three independent experiments. Western blot analysis Whole-cell extracts were obtained in RIPA lysis buffer (20 mM Tris-HCl, pH 7.5, 150 mM NaCl, 1 mM Na2EDTA, 1 mM EGTA, 1% NP-40, 1% sodium deoxycholate, 2.5 mM ...
The surface density has been calculated using the formula: S/V = π/4 × P/A, where P is the perimeter (contour length) of air space and A is the total area of the air space [6]. It is known that exchange of oxygen and carbon dioxide of alveolar cells is largely regulated by ...
— Separately inject equal volumes (about 10µL)of the Standard preparationand the Assay preparationinto the chromatograph,record the chromatograms,and measure the areas of the major peaks.Calculate the quantity,in mg,of C12H17ClN4OS·HCl in the Thiamine Hydrochloride taken by the formula: ...
(35.45 g). Atomic weights can be found in the periodic table of the elements. The molecular weight of a compound, as obtained commercially, is usually provided by the manufacturer and is printed on the container's label. On many reagent labels, aformula weight (FW)is given. For almost ...
The red–brown bands containing the iron(III) complexes were collected under vacuum and washed with 0.01 M HCl. These complexes, Fe(detpp)Cl (1), Fe(trans-tetpp)Cl (2), Fe(cis-tetpp)Cl (3) and Fe(hetpp)Cl (4), are depicted schematically in Fig. 1. Download: Download full-...
First you should draw out the molecule or it's skeleton to get an idea of what you're dealing with. From the formula HC2BrClF we can determine it's an ethene with three halogen substitutions. It can't be named using cis/trans system without ambiguity so you'll have to use E/Z nami...
The boiling points of HCl,HBr and HI increase with increasing molecular weight because the force in moleculars increase with increasing molecular weight. The melting and boiling points of the sodium halides,NaCl,NaBr,and NaI,decrease with increasing formula weight,because the ionicity of NaCl,NaBr,...
the solution was poured into a 500 mL separatory funnel. The flask was washed with 3% aqueous HCl (100 mL) and CH2Cl2(100 mL) until all material, except for Ni powder, was transferred into the funnel. The CH2Cl2layer was separated and the aqueous layer was extracted with CH2Cl2(2×20 mL...