What includes the distance and time at a specific moment?

s = ut + 1/2 att (that's "t" squared), where

s = distance travelled - in metres

u = initial velocity - in meres per second

a = acceleration - in metres per second squared, i.e. metres per second increase in acceleration, per second

t = time taken  - in seconds

Explanation:

Time, "t",  at a specific moment is a resolved variable, i.e. we know the value, so the equation needs to show distance "s" at that specific time "t". The basic equation is for fixed initial position (when t = 0) , where distance ,"s", = "0", fixed initial velocity, "u", ( at t = 0, s = 0 ) - which can be zero or a value, and fixed (constant) acceleration, "a", ( from t = 0, s = 0, through to t = "specific moment", s = "the answer" ) - which can be zero or a value.

b) phosphorus pentoxide

the answer is b, have negligible mass