Question

Question:Atoms of three different elements are represented by $○,\square ,▵.$Which compound is left over when three molecules of $○▵$and three molecules of$\square \square ▵$ react to form$○\square ▵$ and $○▵▵$?

Short answer

Answer

The left over compound is$○\square \square \square \square \square ▵▵▵$ .

Step-by-step solution

Setting up the chemical equation

The chemical equation can be setting up as,

$$\begin{gathered} 3○▵+3\square \square ▵\to ○\square ▵+○▵▵ \\ 3○▵+3{\square }_2▵\to ○\square ▵+○{▵}_2 \end{gathered}$$

Counting of these number on each side

The counting of left and right side can be done. The left side should be,

$$\begin{gathered} 3O \\ 3 \square \times 2= 6 \square \\ 3 ▵ + 3 \square = 6▵ \end{gathered}$$

The right side will be,

$$\begin{gathered} ○ + ○ =2 ○ \\ 1 \square \\ 3 ▵ \end{gathered}$$

The number has to be same for equation balance. The leftover compounds are$1 ○, 5 \square \& 3 ▵.$

Left over compound

The left over compound is $○\square \square \square \square \square ▵▵▵$.