1. What is the law of conservation of mass? How do you know if a chemical equation is in accord with this law? 2. Define and give an example in the form of a balanced equation of (a) a combination reaction (b) decomposition reaction replacement reaction (d) redox reactions 3. Balance the equation H2(g) +N2(g) NH3(g) C3H8(g) + O2)g) CO2 (g) +H2O(g) Ca(OH)2(aq) +Al2(SO4)3(aq) CaSO4(aq) + Al(OH)3 4. Write the balanced equations for a) Silver (s) + sulfur(g) silver sulfide(s) b) Aluminum (s) + iron(III) oxide(s) aluminum oxide(s) + iron(s) c) Sodium chloride(aq) + silver nitrate (aq) sodium nitrate (aq) + silver chloride