Empirical & Molecular Formulas

A formula with the lowest whole # ratio of elements in a compound is called

• Molecular Formula
• Chemical Formula
• Empirical Formula 
• Distance Formula

What is the empirical formula for C₄H₆?

• CH

• CH₃

• C₂H₃

• C₄H₆

What is the empirical formula for N₂S₃?

• NS

• N₃S₂

• N₂S₃

• N₁S_1.5

Si₂F₆

Choose the correct empirical formula...

• SiF

• Si₂F₆

• SiF₃

• Si₆F₂

What is the best definition for subscript?
 

• The big number that tells you the number of molecules.
• The atomic number
• The little number that tells the number of atoms for each element.

C₂H₆O

Which is the correct empirical formula

• CHO

• C₂H₆O

• C₄H₁₄O₂

• None

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

• ionic formula
• covalent formula
• empirical formula
• molecular formula

How many "C" are in CO₂

• 2

• 1

• 0

• 3

How many Carbons "C" are in C₁₈H₃₄O₃

• 18

• 34

• 3

• 37

Which molecular formula only has 12 hydrogens "H"?

• C₄H₁₀ (butane)

• C₅H₁₂ (pentane)

• C₁₂H₂₂O₁₁ (sugar)

• C₈H₁₀N₄O₂ (caffeine)