Is hot tea a heterogeneous mixture or a homogeneous mixture?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Based on its chemical properties, identify the position of each chemical family on the periodic table.

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