Based on the following chemical equation how many molecules of Hydrogen (H) are present in the reactants side?
2H2 + O2 ----> 2H2O
a. 1
b. 2
c. 3
d. 4
Look at the equation. It tells you. Two mols hydrogen react with 1 mol oxygen to form 2 mol H2O.
In the chemical equation 2H2 + O2 → 2H2O, the coefficient in front of a molecule represents the number of molecules.
In this equation, the coefficient in front of H2 is 2, meaning there are 2 molecules of H2 in the reactants side.
Therefore, the answer is b. 2.
To determine how many molecules of hydrogen (H) are present in the reactants side of the chemical equation, we need to count the number of hydrogen molecules.
In this equation, we can see that there are two molecules of hydrogen (H2) as reactants (2H2). Therefore, the correct answer is:
b. 2
Explanation: The coefficients in front of the chemical formulas indicate the number of molecules or atoms involved. The coefficient "2" in front of H2 indicates that there are two molecules of hydrogen on the reactants side.