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?

What reaction is taking place? 02 + c3h8 = h20 + co2

Can someone me with 3 and 4 plz. this is for masteries test.

Which statement explains which thermometer is more appropriate to measure the temperature of a liquid at 43.6 degrees celsius a) thermometer a, because it measures temperature more accurately than thermometer b b) thermometer b, because it measures temperature more accurately than thermometer a c) thermometer a, because it measures temperature more precisely than thermometer b d) thermometer b, because it measures temperature more precisely than thermometer a