Why don’t roller coaster cars return to the
same height at which they started?
a. they are broken.
b. they are safer this way.
c. they transfer some of their energy into thermal energy and sound energy.

Which mathematical relationship should you us to convert moles of a substance into grams

Which substance can be broken down by chemical means

Calculate the standard enthalpy of formation of liquid methanol, ch3oh(l), using the following information: c(graphite) + o2 latex: \longrightarrow ⟶ co2(g) latex: \delta δ h° = –393.5 kj/mol h2(g) + o2 latex: \longrightarrow ⟶ h2o(l) latex: \delta δ h° = –285.8 kj/mol ch3oh(l) + o2(g) latex: \longrightarrow ⟶ co2(g) + 2h2o(l) latex: \delta δ h° = –726.4 kj/mol