empirical formula

Front

What is an empirical formula?

Back

An empirical formula is the simplest whole-number ratio of atoms of each element in a compound.

Front

How do you calculate the empirical formula from percentages?

Back

1. Convert percentages to grams. 2. Convert grams to moles. 3. Divide by the smallest number of moles to find the ratio.

Front

Given 40.05% S and 59.95% O, what is the empirical formula?

Back

SO3

Front

Which of the following is an empirical formula: CH₃COOH, C₆H₁₂O₆, H₂O?

Back

H₂O

Front

What is the empirical formula for a compound with 72.2% Mg and 27.8% N?

Back

Mg₃N₂

Front

What is the empirical formula of a compound with 50% C and 50% O?

Back

CO

Front

Which pair has the same empirical formula: NaCrO₄ and Na₂Cr₂O₇, or C₂H₄O₂ and C₆H₁₂O₆?

Back

C₂H₄O₂ and C₆H₁₂O₆

Front

What is the empirical formula for C₄H₁₀?

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C₂H₅

Front

How do you determine if two compounds have the same empirical formula?

Back

Compare the ratios of the elements in each compound; if they are the same, they have the same empirical formula.

Front

What is the empirical formula for a compound with 80% C and 20% H?

Back

CH₄