Calcium carbonate has the formula: CaCO3 From the periodic table: mass of calcium = 40 grams mass of carbon = 12 grams mass of oxygen = 16 grams Therefore, molar mass of CaCO3 = 40 + 12 + 3(16) = 100 grams molar mass of carbonate = 12 + 3(16) = 60 grams
One mole of calcium carbonate contains one mole of carbonate. Therefore, 100 grams of CaCO3 contains 60 grams of CO3. If the 0.5376 grams of the unknown substance is CaCO3, then the amount of carbonate will be: amount of carbonate = (0.5376*60) / 100 = 0.32256 grams
Based on the above calculations, the sample is not CaCO3
They'd want to disinfect everything so that it is germless. Boiling is a possible answer as well because you can boil certain things to rid them of germs.
The number of protons for an element never change. 82 Is the atomic number for Pb which is how many protons it has. An isotope means it has more neutrons.
