Magnesium oxide breaks apart to form magnesium and oxygen gas. If the reaction creates 12.2 g of magnesium and 8.0 grams of oxygen, how many grams of magnesium oxide were there initially? Explain why you were expect this mass.

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.