Worth 20 points Nitric oxide and bromine were allowed to react in a sealed container. When equilibrium was reached Pro = 0.526
atm, PBr2= 1.59 atm, and PNoBr = 7.68 atm. Calculate Kp for the reaction.
2NOBr(9) 22NO(g) + Br2(g)

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

Iknow #2 is d. i just need to know why

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong