完全非晶的PE的密度ρ⏫=0.85g/cm⏫,如果其内聚能为2.05kcal/mol单体单元,试计算它的内聚能密度。相关知识点: 试题来源: 解析 62.2 cal/cm³ 1. **确定单体单元摩尔质量**:聚乙烯(PE)的单体单元为-C₂H₄-,其摩尔质量M = 2×12(C) +4×1(H)=28 g/mol。2. **计算摩尔体积Vₘ**: V...
能量单位换算 | 1 kcal/mol = 6.948×10-14 erg1 Hartree = 4.36×10-11 erg = 2 Rydberg1 eV = 1.602×10-12 erg1 erg = 1.439×1013 kcal/mol = 6.2415×1011 eV1 kcal/mol = 6.948×10-14 erg1 Hartree = 4.36×10-11 erg = 2 Rydberg1 eV = 1.602×10-12 erg1 erg = 1.439×1013 k...
(1)-|||-答:max=253(基本值)-|||-(2)-|||-答:|max=214(基本值)+25 (5个烷基取代)+5( 1个环外双键)=283 nm+20 (4个烷基取代)+10 (2个环外双键)=244 nm(3)-|||-答:|max=253(基本值)+20(4个烷基取代)=273nm(4)答:I max= 215 (基本值)+10 (1个烷基a取代)=225 nm⑸答: I...
When the electrostatics are augmented by one-parameter estimates of dispersion and hydrogen-bonding contributions, the experimental solvatochromic shifts in the nine solvents are reproduced with a mean unsigned error of 65 cm 1 (0.2 kcal/mol). These calculations present a com......
张先生,男,35岁,干部。身高180cm,体重76公斤,胸围136cm。 请计算张先生一日所需的()热量。A.2010kcalB.2625kcalC.2400kcalD.2000kcal的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线
15 Density functional theory (DFT) calculation using the B3LYP method was employed to determine the binding energy between the monomer molecule of PEG, ethylene glycol, and Pb2+. The calculated binding energy between Pb2+ and O in the ethylene glycol molecule is −94.56 kcal/mol (Figure 1D...
某大型企业总经理(中等体力劳动)女性45岁,身高165cm,体重68kg,体检发现,空腹血糖6.5mol/L,餐后2h血糖11mol/L,血压和血脂水平正常,并无明显不适症状。拟采用单纯饮食控制预防发展为糖尿病。她的每日能量需要量计算为:该女性的标准体重(kg)=身高-105=165-105=60kg;该女性BMI=体重(kg)÷[身高(m)]2=68÷(1....
The thermochemistry measured here findsΔfH00(CN)=102±3kcal/mol,D00(CN)=7.82±0.14eV,andIE(CN)=14.02±0.14eV.The reaction mechanism for this system is explored by examination of the electronic state correlations and by phase‐space calculations. 展开 ...
实验室检查:K3.68mmol/L,Na*142.4mmol/L,血肌酐52.5μmol/L,红细胞比容24.5%,白细胞计数8.6x10/L;血气分析:pH7.4,氧分压90mmHg。 A. 9分 B. 12分 C. 15 D. 18分 E. 21分第十二章危重症患者功能支持 查看完整题目与答案 危重患者应激早期应限制能量供给量,可控制() A. 10~15kcal/(kg...
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