What is global warming? a) a recent increase in the average global temperature near earth’s surface b) a period of time when temperatures across the planet are colder than normal c) a characteristic of summer that returns seasonally d) the gain of heat in coastal areas from el niño storms

Which of the following is most likely true about water in chemical solutions?

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

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?