Apache Spark is often compared to Hadoop as it is also an open-source framework for big data processing. In fact, Spark was initially built to improve the processing performance and extend the types of computations possible with Hadoop MapReduce. Spark uses in-memory processing, which means it...
The average O - H bond energy is 467 kJ / mol.What is the maximum wavelengthof a photon that can cause this bond to split?(a) 3.90 x 10–3nm(b) 235 nm(c) 256 nm(d) 426 nm(e) 1.17 x 108nm 相关知识点: 试题来源: 解析 E=hv h是普朗克constant , E=E(bone energy)/NA , NA...
What is the bond angle of the O−C−O angle of CO2? Bond Angle: The bond angle can be explained as an angle between two adjacent atoms or electron pairs in certain molecules. This angle helps with the geometrical identification of a given molecule according to its atoms' specific ori...
What is an H-bond and what are the conditions for forming an H-bond? How many hydrogen bonds can a water molecule form? Which bond is the most polar: C-H, O-H, N-H, F-H? What are the properties of water that are due to hydrogen bonding?
句意:他所说的是正确的。根据句子分析可知,空格处作句子的谓语部分,What he said为主语从句,主语从句作句子的主语,视为单数,谓语用单三形式。故选C项。
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atoms or molecules determine the bond or molecular polarities. The polar covalent bond is a form of covalent bond that occurs when two non-identical atoms come together. The shared electrons are equidistant from both atomic nuclei and create non-polar covalent connections between atoms of the ...