The cycle that involves the change of water from liquid to vapor and back by evaporation, condensation and precipitation is the:
a.
carbon cycle
c.
water cycle
b.
nitrogen cycle
d.
none of the above

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

What is the subscript for oxygen in its molecular formula

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided