How many collisions does a single a atom, with collision cross section σ=0.36nm2, make in 1.0 s when the temperatre is 25 degree centigrade and the pressure is (a) 10 bar, (b) 100 kpa, (c) 1.0 pa?

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.