Why is the melting point of an element lower than its boiling point? Why do ionic compounds have high melting points? Explain why the melting point and boiling point of alkali metals are low. Why does MgO have a higher melting point than CaS?
Does H2 or O2 have a lower boiling point? Explain your reasoning. Suggest why the melting temperature of magnesium oxide is higher than that of magnesium chloride, even though both are almost 100% ionic. (a) Why do many organic compounds have low melting and boiling points? (b)...
For one, rock salt does have its limits. If the temperature of the roadway is lower than about 15 degrees F (minus 9 C), the salt won't have any effect on the ice. The solid salt simply can't get into the structure of the frozen water to start melting ice. In these cases, the...
1. What is the electron configuration for chlorine? One common ion of chlorine is Cl ^1- . How many valence electrons does this ion have? 2. Explain the atomic packing (both in words and with a pictur Why is it that th...
Studies have shown that bamboo salt contains higher levels of iron,potassium, and calcium compared to regular sea salt and that it could improve your immune system. But these beneficial minerals constitute only a small percentage – the majority of bamboo salt is sodium chloride. Even with lower...
Why does chlorine have a higher electronegativity value than krypton? If salt lowers the melting point of ice, what does that mean? What will cause the ice to melt? What does it mean if its dilute? Why does the plasma membrane form a bilayer?
Why will hexane dissolve benzene but will not dissolve sodium chloride? Can sodium chloride and water be used to make a buffer? Explain. Why does water have high entropy? Describe how to prepare 1.0 L of a 0.10 M NaCl solution. Explain how to prepare 1.0 L of isotonic saline, which i...
Why does water have high entropy? What is the effect of an impurity on the melting point of a solid? Describe the observations that one would make during the simple distillation of an "impure" substance. Suggest reasons why recrystallization from water would probably not be a suitable procedure...
A substance has a low melting point. It does not conduct electricity either when melted or as a solid. It is most likely: A. Diamond (C) B. Copper (Cu) C. Sodium (Na) D. Hydrogen sulfide (H_2S) The method used to separate iron filings from sand is [{Blank...