Final answer:
To find the number of moles of Sn(CO₃)₂, divide the mass in grams (652 g) by the molar mass (238.73 g/mol) to get 2.730 moles, rounding to three significant figures.
Step-by-step explanation:
To convert the mass of Sn(CO₃)₂ to moles, we use its molar mass as the conversion factor. The molar mass of Sn(CO₃)₂, given as 238.73 g/mol, serves as the bridge between grams and moles. Here's how you can set up your calculation:
- Firstly, write down the mass of the substance in grams: 652 g of Sn(CO₃)₂.
- Use the molar mass of Sn(CO₃)₂ (238.73 g/mol) as your conversion factor to go from grams to moles.
Perform the calculation by dividing the mass of Sn(CO₃)₂ by its molar mass:
Number of moles of Sn(CO₃)₂ = mass of Sn(CO₃)₂ / molar mass of Sn(CO₃)₂ = 652 g / 238.73 g/mol
This gives you:
Number of moles of Sn(CO₃)₂ = 2.730 moles (rounded to three significant figures)