How many grams of C are there in a sample of C that contains the same number of moles as a 25.4 gram sample of Ca?
mols in 25.4g Ca = grams/molar mass = approx 0.6 but that's an estimate.
mols C = approx 0.6
g C in 0.6 mols = approx mols x atomic mass.
To find out the number of grams of C in a sample containing the same number of moles as a 25.4 gram sample of Ca, we need to use the concept of moles and molar mass.
First, we need to determine the moles of Ca in the given 25.4 gram sample. To do this, we divide the mass of the sample (25.4 g) by the molar mass of Ca, which is approximately 40.08 g/mol.
Moles of Ca = Mass of sample of Ca / Molar mass of Ca
= 25.4 g / 40.08 g/mol
= 0.633 mol (rounded to three decimal places)
Since we are looking for a sample of C that contains the same number of moles, we can use the relationship between moles and molar mass to find the mass of C.
Moles of C = Moles of Ca (based on the given information)
Molar mass of C = 12.01 g/mol (rounded to two decimal places)
Mass of C = Moles of C x Molar mass of C
= 0.633 mol x 12.01 g/mol
= 7.605 g (rounded to three decimal places)
Therefore, there are approximately 7.605 grams of C in the sample containing the same number of moles as a 25.4 gram sample of Ca.