Name the following alkynes

Explanation:

1) 3,4-dimethyl hex-1,5-diyne

2) 3,3-diethyl pent-4-yn-1-ene

3) 5-(1'-ethyl-2',3'-dimethyl propane) dec-1,3-diyne

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.