Empirical Formula Quiz

What is the empirical formula of glucose if its molecular formula is C6H12O6?

• C6H12O6

• CH2O

• C2H4O2

• C3H6O3

In a problem where you are given 85.6% carbon and 14.4% hydrogen by mass, what is the first step to find the empirical formula?

• Use the periodic table to find atomic numbers

• Directly write the empirical formula

• Assume 100 grams of the compound and convert percentages to grams

• Convert the percentages to moles directly

How do you convert grams to moles when calculating an empirical formula?

• Multiply the mass by the molar mass from the periodic table

• Divide the mass by the atomic number

• Multiply the mass by the atomic number

• Divide the mass by the molar mass from the periodic table

What is the next step after converting the masses of elements to moles in empirical formula calculation?

• Add the moles together

• Find the smallest number of moles and divide all mole values by it

• Multiply the moles by the atomic number

• Convert moles back to grams

If you have 7 moles of carbon and 14 moles of hydrogen, what is the empirical formula?

• C7H14

• CH2

• C2H7

• C14H7