Why does a sample of boiling water remain at the same temperature until all the water has been boiled? Why is slow distillation better than fast distillation? What are the two methods used for testing water in chemical compounds? The distilling flask should never be boiled to dryness. Wh...
Explain why graphite has a lower melting point than diamond even though both are carbon compounds. Describe the bonding in metals and discuss how this explains high electrical conductivity. Explain why some ionic compounds are soluble in water. ...
7 Which statement explains why methane has a lower boiling point than water? B A Methane has weaker covalent bonds than water. B Methane has weaker attractive forces than water. C Methane molecules are heavier than water molecules. D Methane molecules have more bonds than water molecules. 相关...
Water molecules have an easy time escaping off the surface when the air pressure above them is less. Since this is a naturally-occurring condition in high altitude regions, the boiling point of water is reduced and thus it attains the boiling Cooking is significantly impacted by a few factors ...
The girl that has hot vagina she is lucky the problem is you BF doesn't recognize the amazing girl he has my girl is cold and I really can say is not fun to have sex with her my penis feels like is sticking it a cold water and makes my penis go to sleep I really love women ...
Why does ammonia have a lower boiling point than water? « on: February 14, 2013, 03:05:43 AM » The reason I read up on the net is that each water molecule has 4 hydrogen bonds while in ammonia due to having less lone pairs, it is unable to satisfy all the hydrogen atoms so...
Calculate the density in grams per cubic centimeter of HfO_2, which has the CaF_2 crystal structure. Ionic radii are Hf^{4+} =0.087 nm and O^{2?}=0.132 nm. How hot (in both degrees Celsius and Fahrenheit) can you pre...
The problem is, if we don’t charge toward 2035, the result will be both hell and high water. The most dangerous consequences of climate change are yet to come — and to quote former Vice President Al Gore, the global weather report recently has been li...
As air pressure decreases, water molecules require less energy to escape (that is why water has a reduced boiling point at higher elevations). As water temperature increases, average molecular motion will increase, and more molecules will escape to the atmosphere. As relative humidity of the air...
In the 2008 Olympics, volunteers were also doing publicity, bending down to pick up mineral water bottles to keep the audience clean... All of this is volunteer! Volunteer, this has become the longing of my heart; Volunteer, I have left an indelible impression in my heart! And now, I ...