2. A sample of iron weighing 6.50 g (specific heat = 0.449 J/gºC) is colled from 25.3°C to -68.7°C. How much heat was transferred? (Be sure to include the sign).

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

Calculate the number of molecules present in 0.750 mol of mgo.

Geothermal energy for industrial use is available almost anywhere. a. true b. false