The reactant that acts as a lewis base is a) nh3 b) h20 c) both d) neither

C) both

Explanation:

Lewis base -

Lewis base , are the species that have more electron density hence can easily donate its electron density .

The simple indication to determine , whether a species is a Lewis base or not is to look for negative charge or lone pairs of electrons ,

The species having negative charge or lone pairs of electrons , in maximum case , are Lewis bases .

Therefore from the question ,

ammonia and water both are Lewis bases .

Because both the species have lone pair of electrons , hence have more electron density and can easily donate its electron density .

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer