Which is a correctly balanced equation for a reaction between hydrogen gas and oxygen gas? A. 2H_(2)(g)+2O_(2)(g)arrow H_(2)O(g)+heat B. 2H_(2)(g)+O_(2)(g)arrow 2H_(2)O(g)+heat C. H_(2)(g)+O_(2)(g)arrow H_(2)O(g)+heat D. H_(2)(g)+O_(2)(g)arrow 2H_(2)O(g)+heat

The correct answer is B. $2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(g)+heat$<br /><br />Explanation:<br />The balanced chemical equation for the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O) is:<br /><br />$2H_{2}(g) + O_{2}(g) \rightarrow 2H_{2}O(g) + heat$<br /><br />This equation is balanced because the number of atoms of each element is the same on both sides of the equation. Specifically:<br />- There are 4 hydrogen atoms on both sides.<br />- There are 2 oxygen atoms on both sides.<br /><br />The other options are not correctly balanced:<br />A. $2H_{2}(g)+2O_{2}(g)\rightarrow H_{2}O(g)+heat$ is not balanced, as there are 4 oxygen atoms on the left side and only 1 on the right side.<br />C. $H_{2}(g)+O_{2}(g)\rightarrow H_{2}O(g)+heat$ is not balanced, as there are 2 hydrogen atoms on the left side and only 1 on the right side.<br />D. $H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(g)+heat$ is not balanced, as there are 2 hydrogen atoms on the left side and 4 on the right side.<br /><br />Therefore, the correct answer is B. $2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(g)+heat$.