A kilogram weighs (at the earth's surface, e. g., the grocery store) approximately: a. 5.5 pounds
b. 1.5 pound
c. 10 pounds
d. 2.2 pounds

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.