1-24 Write formulas of molecular and ionic compounds based on a description of the atoms or ions that make up a formula unit

1-24-1. What is the formula of an ionic compound consisting of Ca²⁺ and Cl^- ions?
A. CaCl, B. Ca₂Cl, C. CaCl₂, D. Ca₂Cl₂

1-24-2. What is the formula of an ionic compound consisting of Na⁺ and CO₃^2- ions?

A. NaCO₃, B. Na₂(CO₃)₂, C. NaCO, D. Na₂CO₃

1-24-3. What is the formula of an ionic compound consisting of Ca²⁺ and CO₃^2- ions?

A. CaCO₃, B. Ca₂(CO₃)₂, C. CaCO, D. Ca₂CO₃

1-24-4. What is the formula of an ionic compound consisting of Mg²⁺ and PO₄^3- ions?

A. Mg₂PO₃, B. Mg₃(PO₄)₂, C. Mg₃PO₂, D. MgPO₄

1-24-5. A molecule of fructose consists of six carbon atoms, twelve hydrogen atoms, and six oxygen atoms. The formula of fructose is...
A. C₆H₁₂O₆, B. CHO, C. CH₂O

1-24-6. A molecule of acetic acid consists of four hydrogen atoms, two carbon atoms, and two oxygen atoms. Which of these cannot possibly be the formula of acetic acid?
A. H₄C₂O₂, B. H₂CO, C. HC₂H₃O₂, D. CH₃COOH

1-24-7. Which of these is not the formula of the compound represented by the figure below, if blue spheres represent carbon atoms, white spheres represent hydrogen atoms and red sphere represents an oxygen atom?

A. CHO, B. C₂H₆O, C. C₂H₅OH, D. CH₃CH₂OH