[OH-] is 5.62x10-9 56.2x10-9 O 1.78 x10-6 o 17.8 X10-9​

i believe it is a.) released into

explanation:

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

wher is the rest of the question