The mass of 1 molecule of KCO2 is found by adding the atomic masses of potassium (K), carbon (C), and 2 oxygen atoms (O), multiplied by the stoichiometric coefficients of each element in the formula:
Mass of KCO2 = (1 x atomic mass of K) + (1 x atomic mass of C) + (2 x atomic mass of O)
Mass of KCO2 = (1 x 39.10 g/mol) + (1 x 12.01 g/mol) + (2 x 16.00 g/mol)
Mass of KCO2 = 98.11 g/mol
So, the mass of 4.214 x 10^24 molecules of KCO2 can be calculated as:
Mass = number of molecules x mass of 1 molecule
Mass = (4.214 x 10^24) x (98.11 g/mol)
Mass = 4.13 x 10^26 g
Therefore, 4.214 × 10^24 molecules of KCO2 have a mass of 4.13 x 10^26 g.
4.214 × 1024 molecules of KCO2 has what mass?
1 answer