Question

The first part of a balanced chemical reaction is shown 6CO2+6H2O.in order for this equation to be balanced how many oxygen atoms must be present in the products

Answer 1

We have the number of molecules of each reagent. The number before the molecule indicates the number present, the subindex after each atom tells us how many are inside the molecule and reflects the type of compound we have:

`\begin{gathered} 6CO_2\text{ means that we have 6 mol of CO}_2 \\ \text{For each atom we will have: } \\ C\colon6\text{ x 1 =6} \\ O\colon\text{ 6 x 2 = 12} \end{gathered}`

We do the same for another molecule:

`\begin{gathered} 6H_2O\text{ means that we have 6 mol of H}_2O \\ \text{For each atom we will have:} \\ H\colon\text{ 6 x 2 = 12} \\ O\colon\text{ 6 x 1 = 6} \end{gathered}`

If we add up all the atoms we will have:

C: 6

O: 12 + 6 = 18

H: 12

So, we will need 18 oxygen atoms (O) must be present in the products.