Methanol at 675°c and 1 bar is fed at a rate of 100 mol/s is fed to an adiabatic reactor where 25% of it is dehydrogenated to formaldehyde according to the reaction chaoh (g) hcho (g) +h2 (8). calculate the temperature of the gases leaving the reactor assuming that constant heat capacities of 17, 12, and 7 cal/mol°c for ch3oh, hcho, and h2, respectively are applicable. heat of formation for hcho (g) and ch3oh (g) are-27.7 and 48.08 kcal/mol

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Drug abuse will not lead to physical and psychological dependence. true or false ?