Convert the 48.7 grams into moles and then use the balanced equation to convert to moles of hydrogen gas. Then divide by avogadro's number<span />
The first one is right and so is eight you have to add them together to see if they go together if they dont add what is missing
Answer:
the overall charge on the nitride anion is
(
3
−
)
.
N power 3
− →
the nitride anion