Oxygen by itself is not harmful; , it can become harmful when combined with carbon. * 1 point
however
for instance
in summary
namely

what's the question?? I see nothing

However

Explanation:

sounds the best and makes since

passing a magnet thought the

mixture , because iron gets attracted to magnet .

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.