Empirical Formula

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

• Molecular Formula

• Chemical Formula

• Empirical Formula 

• Distance Formula

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

•  NaPO2

• Na2PO3

• Na3PO4

• NaPO4

Whats the empirical formula of a molecule containing 18.7% of Lithium, 16.3% of Carbon and 65.0% of oxygen?

• CO₂Li₃

• Li₂CO₃

• Li₃CO₂

• LiCO₅

What is the empirical formula for C₄H₆?

• CH

• CH₃

• C₂H₃

• C₄H₆

Tags

NGSS.MS-PS1-1

Which of the following is a correct example of an empirical formula?

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DOK Level 1: Recall

What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?

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DOK Level 2: Skill/Concept

Which of the following is an example of an empirical formula?

Tags

NGSS.MS-PS1-1

What is the main difference between an empirical formula and a molecular formula?

• Empirical formulas show the exact number of atoms of each element in a molecule.

• Molecular formulas show the simplest whole-number ratio of atoms in a compound.

• Empirical formulas show the simplest whole-number ratio of atoms in a compound.

• Molecular formulas are always the same as empirical formulas.

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DOK Level 1: Recall

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

• Mg₄N₃

• MgN₂

• Mg₃N₂ 

• MgN