Need with this equation! can anybody lay out an answer ?
use this equation; 4fe + 3o2 -> 2fe2o3.
if 96.0 grams of oxygen react, what mass of iron was oxidized?
a.) 32.0 g
b.) 96.0 g
c.) 167 g
d.) 223 g
!

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.