Answer:
Cannot be balanced as written.
Step-by-step explanation:
H2S+NO3-=S8+NO
Start with the most complex molecule and assign a 1 as the coefficient. Lets choose NO3.
H2S+1NO3-=S8+NO
Since 1 NO3 has 1 N and 3 O, we need to find homes for these atoms on the product side.
The N atom is fine, but there are 3 O atoms coming in and only 1 going out in the NO. So we need to make the coefficient for NO 3:
H2S+1NO3-=S8+3NO
But this adds 2 more N atoms. The only source for N atoms is the NO3. But if we increase the NO3 coefficient to 3, it generates even more O atoms. We can also see that although H atoms come in with the H2S, there is no product that contains H atoms.
The equation cannot be balanced as written. Water is also likely involved in this reaction. Please check the reaction.