A hmogeneous mixture is i. same (uniform) throughout
ii. two or more substances that are combined
iii. same(uniform) chemicalproperties
throughout
iv. are sometimes called solutions
i, ii, iii
i, ii, iv
, iv
i, ii, iii, iv

let that person have a turn to speak : )

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.