Question

Formula: Zinc carbonate forms zinc oxide and carbon dioxide Hydrofluoric acid and silicon dioxide forms silicon tetrafluoride and water Perchloric acid reacts with cadmium to form cadmium (II) perchlorate

Answer 1

Here are the balanced chemical equations for the given reactions:

1. Zinc carbonate (ZnCO3) forms zinc oxide (ZnO) and carbon dioxide (CO2):

\[ZnCO3 → ZnO + CO2\]

2. Hydrofluoric acid (HF) and silicon dioxide (SiO2) form silicon tetrafluoride (SiF4) and water (H2O):

\[4HF + SiO2 → SiF4 + 2H2O\]

3. Perchloric acid (HClO4) reacts with cadmium (Cd) to form cadmium (II) perchlorate (Cd(ClO4)2):

\[2HClO4 + Cd → Cd(ClO4)2 + 2H2O\]

These equations represent the chemical reactions described in the formulas you provided.