Power plants that produce electricity emit at least two-thirds of nitrogen oxides.

True

False

True

Explanation: power plants that produce electricity emit at least two-thirds of nitrogen oxides is true

hope this helps!

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