How many moles are in 159 Liters of He2F?
O 9 moles
0 7 moles
5 moles
O 8 moles

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate