Stoichiometry unit test review

Which type of formula represents the simplest whole-number ratio of atoms of the elements in a compound?

• molecular formula

• condensed formula

• empirical formula

• structural formula

What is the empirical formula of a compound that has a carbon-to-hydrogen ratio of 2 to 6?

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Which is an empirical formula?

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Which formula is both a molecular and an empirical formula?

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A compound has the empirical formula CH₂O and the molecular formula has a gram-formula mass of 60. grams per mole. What is the molecular formula of this compound?

• CH₂O

• C₂H₄O₂

• C₃H₈O

• C₄H₈O₄

What is the molecular formula of a compound that has a molecular mass of 54 and the empirical formula C₂H₃?

• C₂H₃

• C₄H₆

• C₆H₉

• C₈H₁₂

If 46 grams of Na and 71 grams of Cl₂ react completely, what is the total mass of NaCl produced?

• 58.5 g

• 117 g

• 163 g

• 234 g

What is the gram-formula mass of (NH₄)₃PO₄?

• 112 g/mol

• 121 g/mol

• 149 g/mol

• 242 g/mol

The gram-formula mass of NO₂ is defined as the mass of

• two molecules of NO

• two moles of NO

• one molecule of NO₂

• one mole of NO₂

The molar mass of Ba(OH)₂ is

• 154.3 g

• 155.3 g

• 171.3 g

• 308.6 g