%Comp, Empirical and Molecular Formulas

%Comp, Empirical and Molecular Formulas

Practice Quiz

This is your chance to see what type of questions will be on this Quiz.

• The first slide will be the steps to solve the problems (also imbedded in the questions). Please review before you start the questions.

• You need a periodic table (the digital version is best) and a calculator to solve the questions. Have those available before you start the questions.

• The questions are timed in order for you to stay on track.

• The Answers to each question are located after the Questions.

• GOOD LUCK!!!

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Calculate the mass % of carbon that is in C_2H₅.

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What is the Empirical Formula for a substance that is 75% Carbon, 25% Hydrogen?

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Methylpropene is used to make synthetic rubber and contains 0.556g carbon, 0.0933g hydrogen. What is the empirical formula?

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Vinegar is a dilute solution of acetic acid. If the molar mass collected is 60 g/mol and the empirical formula is CH₂O, what is the molecular formula of this acetic acid?