A chemist adds 3.0 g sodium nitrate to 1.0 L water and stirs. The resulting solution is clear and colorless. He adds another 1.0 g sodium nitrate and stirs. The solution remains clear and colorless. What was true of the original solution he made?

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.