12. When 5
when 50.0 mL of water con-
raining 0.50 mol HCl at 22.5°C
is mixed with 50.0 mL of
water containing 0.50 mol
NaOH at 22.5°C in a calorime-
ter, the temperature of the
solution increases to 26.0°C.
How much heat (in kJ) was
released by this reaction?

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.