Question

remember- you cant change the formulas!
reactants
products
___ h₂ + _ o₂ → ___ h₂o
○ 1
○ 4
○ 2

Explanation:

Step1: Balance hydrogen

The number of hydrogen atoms in \(H_2\) and \(H_2O\). Let the coefficient of \(H_2\) be \(a\) and of \(H_2O\) be \(c\). For hydrogen: \(2a = 2c\).

Step2: Balance oxygen

The number of oxygen atoms in \(O_2\) and \(H_2O\). Let the coefficient of \(O_2\) be \(b\) and of \(H_2O\) be \(c\). For oxygen: \(2b=c\).
Let's assume \(b = 1\), then \(c = 2\) (from oxygen balance). Substituting \(c = 2\) into the hydrogen - balance equation \(2a=2c\), we get \(a = 2\).

The balanced equation is \(2H_2+1O_2
ightarrow2H_2O\)

Answer:

The coefficients are \(2\) (for \(H_2\)), \(1\) (for \(O_2\)) and \(2\) (for \(H_2O\)). So the answer for the coefficient of \(H_2\) is \(2\), for \(O_2\) is \(1\) and for \(H_2O\) is \(2\). If the question is asking for the coefficient of \(H_2O\) (assuming from the context of the given options \(1\), \(4\), \(2\)), the answer is \(2\).