Balancing chemical equations worksheet instructions: after you have read the section in the text on balancing chemical equations and viewed the tutorial on the topic, then balance the equations below. insert the coefficients in the spaces provided. 1. h2 + o2 => __2_ h2o 2. n2 + h2 => nh3 3. s8 + o2 => so3 4. n2 + o2 => n2o 5. hgo => hg + o2 6. co2 + h2o => c6h12o6 + o2 7. zn + hcl => zncl2 + h2 8. sicl4 + h2o => h4sio4 + hcl 9. na + h2o => naoh + h2 10. h3po4 => h4p2o7+ h2o