What are the 5 major factors that effect reaction rate

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?

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.

If the enthalpy value for a reaction is negative, what does that indicate about the reaction?