Assignment:
Q1. What kind of substance is iron-sulfur combination before heating?
Q2. Why is it necessary to heat the test tube in order for a chemical reaction to occur?
Q3. What kind of substance is iron-sulfur combination after heating?
Q4. The element sodium reacts explosively with water and the element chlorine is a yellow-green poisonous gas. When chemically combined, sodium and chlorine form nonexplosive, nonpoisonous table salt. How can this be? What is happening?
Q5. Is Iron Pyrite a mixture or compound? What about Salt Water? What about Silicon Dioxide? What about Sand?
Provide complete and step by step solution for the question and show calculations and use formulas.