Question

an unknown compound has the following chemical formula: pcl_x where x stands for a whole number. measurements also show that a certain sample of the unknown compound contains 9.3 mol of chlorine and 1.87 mol of phosphorus. write the complete chemical formula for the unknown compound.

Explanation:

Step1: Find the ratio of moles

Divide the moles of chlorine by the moles of phosphorus to find the value of x.
$x=\frac{9.3}{1.87}$

Step2: Calculate the value of x

$x = 5$

Answer:

$PCl_{5}$