Which of these equations is balanced?

a. zn + 2hcl --> zncl2 + h2

b. s8 + 24f2 --> 8sf6

1. a

2. b

3. a and b

4. neither

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

In 2002, the rare earth elements mine in mountain pass, california was closed because