1.6—Experimental data to calculate empirical and molecular formulae

Be able to use experimental data to calculate empirical and molecular formulae.

Use —experimental data to calculate empirical and molecular formulae to connect the rule to the data and decision in the question.

This matters because —experimental data to calculate empirical and molecular formulae determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —experimental data to calculate empirical and molecular formulae to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: use the formula and units given in the question, show the substitution and interpret the result; the calculation alone is not the conclusion.