as you get to the top of the pyramid, there’s really no place for a crane to stand. The stone blocks are too narrow to provide a base. 教授简单描述理论之后立刻提出转折,这个理论的问题就在于金字塔顶端没有地方
the main ingredient in antifreeze. When ethylene glycol (molecular weight, 62.07) polymerizes, reacts with itself (in water), the reaction yields a variety of products containing varying numbers of ethylene glycol units. These products are all called PEGs. The general molecular formula for PEG is...
Diesel gas is heavier thanjet fuel, with a higher number of slightly larger hydrocarbon chains, though both are primarily paraffin oils (kerosene). Diesel is more viscous than jet fuels. Additives - Jet Jet fuel often has antifreeze and anti-microbial agents, static dissipaters and corrosion inh...
What are differences between evaporation and sublimation? What is a solute solvent reaction? What salt is most soluble at 20 degrees Celsius? What happens when a supersaturated solution cools down? What is the solute and solvent in 0.9% sodium chloride (normal saline)? Explain the rationale for...
The presence of solute in a solution alters the chemical properties of the solution. The properties of a solution that depend on the amount of both the solute and the solvent are referred to as colligative properties.Answer and Explanation: ...
In summary, although both Magnesium chloride hexahydrate and Magnesium chloride contain magnesium chloride, there are differences between them. Magnesium chloride hexahydrate is a hexahydrate with higher solubility, mainly used to prepare other chemicals. On the other hand, Magnesium chloride is an anhydro...
Integral and surface proteins are permanently embedded within the plasma membrane, while peripheral protein is temporally associated with the plasma membrane. So, this is the key difference between integral peripheral and surface proteins. The following infographic lists more differences between integral per...
Some plants are adapted to survive frigid conditions through mechanisms like antifreeze proteins, but many cannot withstand extreme cold. 3 What are the economic impacts of frigid temperatures? Frigid temperatures can lead to increased energy demand, infrastructure damage, and disruptions in transportation...
Methanal (formaldehyde) and methanol are both organic compounds with significant differences in their chemical structure and uses. Methanal, with the formula CH2O, is the simplest aldehyde and is characterized by its strong, pungent smell and potential health hazards, including its role as a carcino...
Ethylene oxide is a simple epoxide used in making antifreeze. 9 Epoxy A thermosetting polymer made from epoxides. Epoxy resins are used in the production of strong adhesives. 10 Epoxide Susceptible to ring-opening reactions. Epoxides open up in the presence of nucleophiles, leading to various prod...