aSometimes I wonder how relevant chemistry is to these students,most of whom will be going back to their villages after Year 8 anyway. 有时我想知道怎么相关的化学是对这些学生,多数谁无论如何去回到他们的村庄在年8以后。[translate]
Although the crystals are quite strong, handle your crystal geodes carefully. Also, encourage your kids to get out magnifying glasses and check out the shape of the crystals! The Science of Growing Crystals Crystal growing is a neat chemistry project that is a quick setup involving liquids, soli...
The most frequently used solvents to make up test compound solutions include dimethyl sulfoxide (DMSO), methanol and ethanol. The latter two, however, have the disadvantage of rapid evaporation whereby the stated concentration of stock solutions cannot be maintained. Solutions in 100% DMSO have becom...
and it can also make you get excited, let you have a nice day. Then, talk with people in English; it’s interesting and very used. Finally, most importantly, try your best to learn English. No pains, no gains. I hope
These films are very dense and only a few nanometers thick, while their bond to the bulk metal beneath is very strong, inhibiting further corrosion4,5. Despite this self-protection mechanism, Al alloys like other metallic alloys, suffer substantial losses as a result of degradation in aqueous ...
Chemistry Solutions What Are Solutions? How and Why Do Things Dissolve? Determining the Concentration of a Solution Factors That Affect Solubility Dilutions When making a solution, it's handy to know if one thing will dissolve in another. After all, if somebody wants you to make them a liquid...
PubChem:PubChem is an open chemistry database maintained by the National Institutes of Health (NIH). It was established to make chemical data freely available to the scientific community and the general public. ChemCollective:This resource offers virtual labs and simulations, allowing you to perform...
When I started college as a first-generation student, I only knew that I had an interest in mathematics and chemistry, but I did not know what my long-term goals were yet. Considering the lack of footsteps to follow, I sought the advice of a professor who recognized my abilities and sug...
Write the chemical components of the reaction in the standard notation format. In our example, this will be CH4, O2, CO2 and H2O. In chemistry, to "yield" means that whatever is before turns into whatever comes after, so be sure that "yield" is roughly in the middle. That phrase will...
The first step in figuring out any scientific problem is to make observations. Anobservationis anything you can notice about the subject. For example, if you were trying to find out what the best material is for creating a parachute, you might start by making observations. What are important...