Exploring Empirical and Molecular Formulas

What is the molecular formula of glucose?

• C12H22O11

• C6H12O6

• C2H4O2

• CH2O

What is the empirical formula of glucose?

• C2H4O2

• CH2O

• C12H22O11

• C6H12O6

What is the empirical formula of hydrogen peroxide?

• HO

• H2O2

• O2

• H2O

How do you calculate the percent composition of an element in a compound?

• Divide the molar mass of the element by the molar mass of the compound and multiply by 100

• Subtract the molar mass of the element from the molar mass of the compound

• Multiply the molar mass of the element by the molar mass of the compound

• Add the molar masses of all elements and divide by 100

What is the percent composition of calcium in calcium phosphate?

• 38.76%

• 40.08%

• 35.00%

• 42.50%

What is the total mass of calcium phosphate?

• 350 grams

• 310.18 grams

• 300 grams

• 320 grams

What is the percent composition of oxygen in potassium permanganate?

• 40.5%

• 50%

• 30%

• 25%

What is the molar mass of oxygen used in the calculation for potassium permanganate?

• 64 grams

• 32 grams

• 48 grams

• 16 grams

How many grams of carbon can be extracted from 321 grams of carbon dioxide?

• 75 grams

• 87.6 grams

• 100 grams

• 50 grams

How many grams of hydrogen can be extracted from 52 grams of water?

• 8 grams

• 2 grams

• 10 grams

• 5.83 grams