Lars is balancing equations with his study group. He is unsure about one equation because each member of the study group
came up with a different answer. Which is the proper way to balance the equation Ca(OH)2 + H3PO4 - Ca3(PO4)2 + H2O?

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

How can the periodic table be used to predict the behavior of elements?