Empirical And Molecular Formula

Question 1

Define empirical formula

Answer 1

The smallest whole number ratio of the elements in a compound

Question 2

Define molecular formula

Answer 2

Actual number of each type of atom in a compound

Question 3

What is the method of finding the molecular formula using the empirical formula? (Steps)

Answer 3

1. Calculate mass of empirical formula
2. Take relate molecular mass and divide it by mass of empirical formula
3. Multiply empirical formula by number in step 2

Question 4

What is the method of finding the empirical formula?

Answer 4

1. Assume percentages as mass (grams) (assume 100g)
2. Find the moles
3. Divide moles by lowest number mole
4. Multiply the values in step 3 by a number (find) until fractions are eliminated
5. Write empirical formula