Answer;
Water has the highest normal boiling point and methanol on the other hand has the lowest boiling point.
Explanation;
-The normal boiling point is the temperature in which the vapor pressure of a liquid becomes equal to atmospheric pressure.If the inter-molecular forces are small, the liquid has a high vapor pressure. Little heat energy will have to be added to separate the molecules, so the boiling point will be low.
-Boiling points and equilibrium vapor pressure are inversely proportional, because less heat is required to raise vapor pressure to reach atmospheric pressure.
-Therefore, since water has the lowest vapor pressure, water it has the highest boiling point and since methanol has the highest vapor pressure it has the lowest boiling point.
Answer : A single carbon atom can form a maximum of <u>Four (4)</u> covalent bond(s).
Explanation : A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs.
Formation of covalent bond depends on the number of valence electrons. Electronic configuration of Carbon (C) is :
Valence electronic configuration of C is :
Carbon have four valence electron that means Carbon can form maximum of four covalent bonds.
For example : In methane (CH4) Cabon can share four electrons with four Hydrogen atoms and can form four covalent bonds with 4 H.
The 2 represets 2 nitrogen gas atoms
As both size and weight of an object increase, so will the amount of friction. The bigger size an object is, the more surface area it will have, and the heavier an object is, the more pressure it will place on something else. Both these factors lead to increased friction.