g Given the thermochemical equation below, how many moles of methanol (CH3OH) must react with oxygen (O2) in order to produce 70 kJ of heat energy? 2 CH3OH(l) + 3 O2(g) ––––> 2 CO2(g) + 4 H2O(l) ; ∆H = –1400 kJ

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.