To find the mass of a MgCO3 molecule in kilograms, you can first determine the molar mass of MgCO3 in grams/mol, and then divide that value by the conversion factor between grams and kilograms.
The molar mass of a substance is the mass of one mole of that substance, and it is typically expressed in grams/mol. The molar mass of MgCO3 is 84.311 g/mol. This can be calculated by adding up the atomic weights of the individual elements in the molecule:
Mg: 24.305 g/mol
C: 12.01 g/mol
O: 16.00 g/mol
Total: 52.315 g/mol
To find the mass of one MgCO3 molecule in kilograms, you can divide the molar mass of MgCO3 (84.311 g/mol) by the conversion factor between grams and kilograms, which is 1000 g/kg. This gives you a mass of 0.08431 kg/mol for MgCO3.
To find the mass of a single MgCO3 molecule in kilograms, you would need to divide this value by Avogadro's number, which is the number of atoms or molecules in one mole of a substance. Avogadro's number is 6.022 x 10^23 atoms/mol or molecules/mol.
So the mass of a single MgCO3 molecule in kilograms would be:
(0.08431 kg/mol) / (6.022 x 10^23 molecules/mol) = 1.40 x 10^(-25) kg
I hope this helps! Let me know if you have any questions.