An 11.2g piece of zinc was added to 30mL of water in a graduated cylinder. Once the zinc was added, the cylinder now reads 31.65mL. a. What is the density of zinc, according to the measurements above?

b. If the actual density of zinc is 7.10, what is the percent error?

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.