Final answer:
The question involves the balancing of a chemical equation, specifically for the reaction of silane with oxygen to form silicon dioxide and water vapor. The corrected and balanced formula is SiH4(g) + 2O2(g) → SiO2(s) + 2H2O(g).
Step-by-step explanation:
The student's question involves the balancing of a chemical equation, which is an essential skill in chemistry. The correct balanced equation for Si2H3(s) + O2(g) → SiO2(g) + H2O(g) is not provided, hence, we need to correct it first. Because the given equation is not a common one and appears to have typos, let's balance the compounds based on the chemical equation for silane (SiH4) reacting with oxygen, which is a realistic example: SiH4(g) + 2O2(g) → SiO2(s) + 2H2O(g).
This equation is now balanced with one molecule of silane reacting with two molecules of oxygen to produce one molecule of silicon dioxide and two molecules of water vapor. Here we have one silicon atom on both sides, four hydrogen atoms on both sides, and a total of four oxygen atoms on both sides, making the equation balanced.