The following reaction reaches equilibrium at 650°c and atmospheric pressure:
n2(g) + c2 h2(g) → 2hcn(g)
if the system initially is an equimolar mixture of nitrogen and acetylene, what is the composition of the system at equilibrium? what would be the effect of doubling the pressure? assume ideal gases.

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Why is it that 85.48 rounded to two significant figures is 85 and not 86?