Balance these equations ___H2SO3—>___H2O+___So2

Na2S+___HCl—->Nacl+H2s

__Fe+___Cl2—->Fecl3

Zn+___HCl__ZnCl2+___H2

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.