Empirical Formulas

What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?

• NO
• N₂O₃
• N₂O₄
• N₂O₅

An empirical formula:

• is a formula that calculates the coefficients of a compound in a balanced equation.
• is the simplest whole-number ratio of moles of elements in the compound.

What do you do when you get a half in the ratio?

• add 2 to each element
  add two to only the one with the half
• multiply the one with the half only by two
• multiply all of them by two
• add two to all of the ratios

What is the empirical formula if you have 88.80% copper and 11.20% oxygen?

• Cu₃O₈
• CuO₄
• Cu₂O
• Cu₄O₁₀

What is the empirical formula of the following molecular formula:  C₃H₆

• C₃H₆
• CH₂
• C₂H₄
• CH₃

Which one is empirical?

• H₂O₂
• C₂H₆O₁₂
• CaCl₂
• N₂O₈

What is the empirical formula for a compound containing the following ratio:
3Na:1P:4O

• NaPO₄
• Na₃P₄O
• Na₃PO₄
• NaPO

A compound came out with the following ratio
3 Carbon: 1.49 Phosphorus: 2 Oxygen- what would be the empirical formula?

• Ca₆P₃O₄
• C₃PO₂
• C₆P₃O₄
• C₃P₃O₂