Question

how many phosphorus atoms are there in 5 molecules of pcl₃? hint: the symbol for phosphorus is p.

Explanation:

Step1: Analyze the formula of \( PCl_3 \)

In one molecule of \( PCl_3 \), the subscript of \( P \) (phosphorus) is 1, which means there is 1 phosphorus atom per molecule of \( PCl_3 \).

Step2: Calculate the number of phosphorus atoms in 5 molecules

To find the number of phosphorus atoms in 5 molecules of \( PCl_3 \), we multiply the number of molecules (5) by the number of phosphorus atoms per molecule (1). So the calculation is \( 5\times1 = 5 \).

Answer:

5