Question

a chemical reaction has the equation 2agno₃ (aq) + zn (s) → 2ag (s) + zn(no₃)₂ (aq). what type of reaction occurs between agno₃ and zn?
a) decomposition
b) synthesis
c) double displacement
d) single displacement
question 19 (5 points)
listen
the vsepr theory is used to
a) determine the partial charge δ on each atom.
b) predict molecular structure.
c) predict crystal structures.

Explanation:

• For the first question: In a single - displacement reaction, one element replaces another in a compound. Here, Zn (a metal) replaces Ag in \(AgNO_3\). In a decomposition reaction, a single compound breaks down into two or more simpler substances. In a synthesis reaction, two or more substances combine to form a single compound. In a double - displacement reaction, the cations and anions of two different compounds exchange partners.
• For the second question: The Valence - Shell Electron - Pair Repulsion (VSEPR) theory is specifically used to predict the molecular structure of a molecule based on the repulsion between electron pairs (bonding and non - bonding) around the central atom. It is not used for determining partial charges (which might involve electronegativity differences in a more detailed sense) or predicting crystal structures (which is more in the realm of solid - state and crystallography theories).

Answer:

• First question: D. Single displacement
• Second question: B. predict molecular structure.