Trends in groups and rows; Balanced and unbalanced equations Periodic Table Trends in groups and rows; Balanced and unbalanced equations

Unpack Equation and Determine if Balanced Subscripts = number of atoms in the molecule Coefficients = number of molecules Is the mass balanced? H2 + O2 -> H2O

Unpack Equation and Determine if Balanced Subscripts = number of atoms in the molecule Coefficients = number of molecules Is the mass balanced? H2 + O2 -> H2O 2 Hydrogens + 2 Oxygens ?=? 2 Hydrogens + 1 Oxygen Not balanced

Unpack Equation and Determine if Balanced H2O2 -> H2O + O2

Unpack Equation and Determine if Balanced H2O2 -> H2O + O2 2 H + 2 O ?=? 2 H + 1 O + 2 O Combine like atoms on each side of the equation 2 H + 2 O ?=? 2 H +3 O Not balanced

Unpack Equation and Determine if Balanced Na + O2 -> Na2O

Unpack Equation and Determine if Balanced Na + O2 -> Na2O 1 Sodium + 2 Oxygens ?=? 2 Sodiums + 1 Oxygen Not balanced

Unpack Equation and Determine if Balanced N2 + H2 -> NH3

Unpack Equation and Determine if Balanced N2 + H2 -> NH3 2 Nitrogen + 2 Hydrogens ?=? 1 Nitrogen + 3 Hydrogens Not balanced

Unpack Equation and Determine if Balanced P4 + O2 -> P4O6

Unpack Equation and Determine if Balanced P4 + O2 -> P4O6 2 Phosphorus’ + 2 Oxygens ?=? 4 Phosphorus’ + 6 Oxygens Not balanced

Unpack Equation and Determine if Balanced C + H2 -> CH4

Unpack Equation and Determine if Balanced Al2 O3 -> Al + O2

Unpack Equation and Determine if Balanced Fe + H2O -> Fe3O4 + H2

Unpack Equation and Determine if Balanced C2H6 + O2 -> CO2+ H2O

Unpack Equation and Determine if Balanced Na2SO4 + CaCl2 -> CaSO4 + NaCl