Question

Which elements are in this unbalanced chemical reaction:

Li(s)+H 2 O(l)→LiOH(aq)+H₂ (g)?

A. Li, H, O
B. Li, O, H
C. Li, H
D. O, H

Answer 1

The correct answer is A. Li, H, O, indicating that lithium, hydrogen, and oxygen are the elements in the unbalanced chemical reaction. To balance chemical equations, the number of atoms of each element should be equal on both sides of the equation. Option A

Step-by-step explanation:

The elements involved in the unbalanced chemical reaction Li(s) + H2O(l) → LiOH(aq) + H2(g) are Lithium (Li), Hydrogen (H), and Oxygen (O). Therefore, the correct answer is A. Li, H, O.

As for the other provided exercises, each one refers to a different chemical equation that may or may not be balanced. The key to determining whether a chemical equation is balanced is to count the number of atoms of each element on both sides of the equation and ensure they are equal.

For instance, in the unbalanced decomposition of water H2O → H2 + O2, there are more oxygen atoms on the right side than on the left, indicating that it is not balanced. Option A