In chemistry, you might see the abbreviation “H₂O”. What does it represent? hydrogen oxide hydrogen dioxide dihydrogen monoxide dihydrogen dioxide相关知识点: 试题来源: 解析 答案:dihydrogen monoxide。“H₂O”是水的化学式,表示两个氢原子和一个氧原子组成的化合物,中文为一氧化二氢,也称为水。
So enthalpy can be measured in either kJkJ or kJ/molkJ/mol right? Finally what if we have the reaction: CH4+2O2⟶CO2+2H2OCH4+2O2⟶CO2+2H2O where ΔH=−890 kJ/molΔH=−890 kJ/mol. What does the per mole now refer to? Because now the reaction is between one mole of CH...
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Economics does not naturally lend itself to scientifichypothesis testingas does physics. In the field of epistemology, scientists can learn through logical thought experiments, also called deduction, or through empirical observation and testing, also called positivism. Geometry is a logically deductive sci...
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A symbol is a sign included in the idea which it represents, e. g., an actual part chosen to represent the whole, or a lower form or species used as the representative of a higher in the same kind. Type To assign to a category; classify or characterize:a political candidate who was...
(2)̅̅̅̅R2=∑i=1n(Oi−O̅)(Si−S̅)∑i=1n(Oi−O̅)2∑i=1n(Si−S̅)2(3)PBIAS=∑i=1nOi−Si*100∑i=1nOiwhere n is the number of observations, O and S represent observed and simulated values at a given time step, respectively, and Ō is the ...
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They have the general formula R–O–R′, where R and R′ represent the alkyl or aryl groups. Ester Any of a class of compounds derived from an oxyacid, usually resulting from the reaction of an oxyacid and an alcohol with the elimination of water. Ether Any of a class of organic ...
Given that perceptions do not fully represent actual practice, however, the congruence between the perceptions of teachers and students identified in this study do suggest a common understanding of FA in the classroom. This suggests that these results reflect a relatively valid assessment of the ...