How many ppm of C29H60 are in 23 pm C29H60? ( 9.4 ppm)
Can anyone explain it?

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

Amixture with the same composition throughout is!

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?