A stream containing ethane, propane and butane has a mass flow rate of 100.0g/s. Write an expression for the molar flow rate of ethane, nE (lb-mole C2H6/h), in terms of the mass fraction of this species, xE.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise