TEACHING THE MOLE CONCEPT USING A CONCEPTUAL CHANGE METHOD AT COLLEGE LEVEL. Chemistry is a subject area that is difficult to understand for some students as it contains abstract concepts, such as mole, molecule and particle. The mo... Üce,Musa - 《Education》 被引量: 7发表: 2009年 Effe...
Due to their abstract nature, the mole concept and solution concentration are difficult for students to understand and apply to stoichiometric calculations. This study was designed to investigate students' perceptions and difficulties in solving problems related to the mole concept and solution concentratio...
Chemistry is a subject area that is difficult to understand for some students as it contains abstract concepts, such as mole, molecule and particle. The mole concept is one of the most important topics in which students have diffuculty in understanding. There are many studies in the literature...
former governor of Indiana and current President of Purdue University. This fellow (who was passed over for serious consideration as GOP presidential nominee in 2012 because of his charisma deficiency) has not only suggested, but actually implemented this amazing concept:Freeze tuition and require admi...
I will say that the concept that urgency and importance need to be considered separately has become a commonplace in management talk. But the expression "The urgent does not leave time for the important" (or perhaps "is not leaving time") will have some freshness, I think. Share Improve th...
“mole” is familiar, but the name of the corresponding quantity “amount of substance” is not so familiar, and the concept is still a source of difficulty for many students. This article reviews and clarifies these two concepts and discusses the definition of the unit “mole” and its ...
so difficult decisions have had to be made about where to expend the most energy and attention. It's time to bow out. The weekly newsletters will cease, and the site will no longer be updated but for the time being at least, TVMole will remain online so that you can still see the ...
Teaching difficult points 1.The teaching of quantity concept of matter. The mole concept In life, we know that there are many units of measurement.What is the unit of length of an object?What is the volume unit of an object?Because these units exist, it is very helpful for our life and...
It is difficult to define any universal chromosomal changes that could explain the course of speciation of currently recognized taxa of BMRs. As stated above, Robertsonian rearrangements, fixed in small isolated marginal populations, are considered to be the major mechanism of 2n chromosomes changes ...
The key concept is to update the old solution to the new one in a small neighborhood using the best solution. The initial population 𝑋=(𝑋1, 𝑋2, 𝑋3,…, 𝑋𝑛), 𝑋𝑖(𝑖∈[1,…, 𝑛])X=(X1, X2, X3,…, Xn), Xi(i∈[1,…, n]) is a vector (D-dimensional...