Temperature graphs from two cities on July 1 are shown below. Which statement is true? A. City A experienced a bigger temperature change than City B.
B. City B experienced a bigger temperature change than City A.
C. The low temperature in City B was lower than the low temperature in City A.
D. Both B and C are true.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

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