Given the unbalanced equation : LFe 2 O 3 +\ Fe+\ CO 2 Determine the amount of moles of CO are required in the simplest form of a balanced chemical equation . A)/2 B ) C)

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

How does water evaporating from a glass show that matter is made up of particles? a. the heat energy from the air causes the glass to fill up with water particles. b. the liquid water particles turn into water vapor that spreads in the air. c. the particles of the glass dissolve in water and cause it to evaporate. d. the tiny particles of the glass evaporate and seem to disappear.

An unknown solution has a ph of 7.2. which of these chemicals is likely to cause the greatest decrease in the ph of the solution when added to the solution? hf koh nh3 hno3