1. 2H2 + O2  2H2O a.) How many moles of H2 would be required to produce 8.21 moles of water?

b.) What mass of H2O is formed when H2 reacts with 57 g of O2?

How does chemistry affect our world? a. chemicals makes our world more polluted. b. chemicals keeps us healthy. c. chemicals can or hurt our world. d. chemicals make our world safe to live in.

Identify a specific example for each type of technology

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion