Respuesta :
As the molecular formula of CaCO₃ suggested, that there are 3 moles of oxygen are there in 1 mole of CaCO₃.
So in 1.25 mol of CaCO₃ contains=1.25 ×3 moles of oxygen
=3.75 moles of oxygen
So there are 3.75 moles of oxygen are there in 1.25 mol of CaCO₃.
There are 3.75 moles of oxygen in a 1.25 mol sample of CaCO₃.
Limestone is primarily a crystal form of CaCO₃ (calcium carbonate). According to its chemical formula, the molar ratio of CaCO₃ to O is 1:3. The moles of oxygen in 1.25 moles of CaCO₃ are:
[tex]1.25 mol CaCO_3 \times \frac{3molO}{1molCaCO_3} = 3.75molO[/tex]
There are 3.75 moles of oxygen in a 1.25 mol sample of CaCO₃.
You can learn more about molar ratios here: https://brainly.com/question/9408497