Connie and Dwayne know the solid potassium reacts very strongly with water producing a chemical called potassium hydroxide along with hydrogen gas. They know the chemical equation looks like this
2k + 2H2O---->2KOH + some amount of H2
There are 4 atoms of hydrogen shown on the reactants side. How many total atoms of hydrogen must be on the product side
2
4
6
8
On the reactants side, there are 2 water molecules, which means there are 4 hydrogen atoms. Looking at the product side, the chemical equation shows that 2 molecules of potassium hydroxide (KOH) are formed. Each molecule of KOH contains 1 hydrogen atom. Therefore, on the product side, there are a total of 2 x 1 = 2 hydrogen atoms.
So, the correct answer is 2.
In the chemical equation provided, it shows that there are 2 molecules of water (H2O) on the reactant side. Since each water molecule contains 2 atoms of hydrogen, the total number of hydrogen atoms on the reactant side is 2 x 2 = 4.
On the product side, the equation shows that there are 2 molecules of potassium hydroxide (KOH). Each KOH molecule contains 1 atom of hydrogen, so the total number of hydrogen atoms on the product side is 2 x 1 = 2.
Therefore, the total number of hydrogen atoms on the product side is 2.
To determine the total number of atoms of hydrogen on the product side of the equation, we need to count the atoms of hydrogen in potassium hydroxide (KOH).
In the chemical formula for potassium hydroxide (KOH), there is only one atom of hydrogen present. Thus, we need to consider the coefficient 2 in front of KOH in the balanced chemical equation.
Since there are 2 moles of KOH on the product side, and each mole of KOH contains one atom of hydrogen, the total number of atoms of hydrogen on the product side is 2 x 1 = 2.
Therefore, the correct answer is 2.