Which has a slightly greater mass in a nuclear reaction, the reactants or the products? why?

The reactants have a slightly greater mass.  In a nuclear reaction, a small amount of mass is converted to energy according to the equation E = mc2.   The difference in mass is referred to as the mass defect.

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'

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.