A boiler feed pump delivers 100 ft3/min of water at 400 F, 3000 lbf/in.2. What is the

Question:

A boiler feed pump delivers 100 ft3/min of water at 400 F, 3000 lbf/in.2. What is the mass flow rate (lbm/s)? What would be the percent error if the properties of saturated liquid at 400 F were used in the calculation? What if the properties of saturated liquid at 3000 lbf/in.2 were used?