From the lab iodine clock reaction: explain the reason this result by comparing what is involved in changing fe2+ into fe 3+ to what is involved in changing c2o4 2- to 2 co2

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

When an object is heated it contracts. a. true b. false

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.