MgH2 + 2 H2O → Mg(OH)2 + 2 H2
Hydrogen (H) was first, followed by helium (He).
The completed and balanced equation is:
<span>Hg(N<span>O3</span><span>)2</span>+N<span>a2</span>Cr<span>O4</span>=HgCr<span>O4</span>+2Na(N<span>O3</span>)
Hope this helps :)</span>
Answer:
What reaction is balanced
