2. you are on a spaceship and are running out of oxygen. there is a supply of water and you have a strong
electrical supply. you need 120 liters of oxygen (at stp) to last until you reach earth. you can't use all of
the water or you will die. you check the water gauge and you see that you have 500 kg of water left. can
you make it home? how much water will you have to electrolyze in order to produce enough oxygen?
how much water will you have left for drinking?

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

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid