The percentage composition of a compound is the percent by mass of each element in the compound. How do we calculate the percent composition? Here are the steps: Calculate the molar mass of the compound. 2.Divide the molar mass of each element by the molar mass of the compound and multiply by
Molar mass means the mass of one mole. The molar mass concept can be applied to elements and to compounds. Molar mass is expressed in grams. For example, one mole of carbon has amass of 12 grams. Therefore, carbon’s molar mass is 12 grams. This is equivalent to the statement that 6. 02 x 1023 atoms
Isotopes: Isotopes are atoms of the same element having the same atomic number but different atomic masses. Note that the difference in the masses of isotopes is due to the different number of neutrons in their nuclei. Isotopes have the same chemical properties . because they have the same number of electrons. Isotopes have different physical