1. Mass is how much matter is in something or someone, while weight is how much gravitational pressure is on something or someone, but that depends on were something or someone is.
3. STP stands for standard tempter and pressure. STP is always 00 C and 1 atmisoric pressure.
4. Dimensional analysis is a type of equation that allows you to change the label on mass, like for you to go from grams to leaders.
5. Molecular weight is the weight of one molecule of a substance. Avogadro�s number (6.022*1023) is a number that is used for converting moles into atoms, in dimensional analysis. Once you have used Avogadro�s number it is possible to get the (M.W.) of the substance.
6. Theory is something that can be tested and possibly is wrong while law is what something will do when you do something to it. They are similar in that they both state a rule, only theory may not be true.