Answer:
Explanation:The molecular formula of a compound can be determined when the moles, grams, and atoms present in the sample are known. In this case, 0.50 moles of Strontium (Sr), 35.5 grams of Chlorine (Cl) and 1.81 x 1024 atoms of Oxygen (O) are present in the sample which gives us enough information to determine its molecular formula.
To calculate this we will need to use a combination of Avogadro’s number and atomic mass values for each element involved in order to find out how many molecules make up our compound as well as their ratios within it - thus giving us our answer!
By using these calculations we can determine that the molecular formula for this particular compound is SrCl2O7; meaning that one molecule contains one atom each from Strontium & Chlorine along with seven oxygen atoms – making it an ideal example for demonstrating how you can work out a compounds’s chemical composition given certain parameters!