Calculate the mass percent composition of C,H, O and in aspirin. Express your answers using two significant figures. Enter your answers numerically separated by commas.
To calculate the mass percent composition of each element in aspirin (C9H8O4), we need to determine the molar mass of each element and the molar mass of the compound.
The molar mass of carbon (C) is approximately 12.01 g/mol, hydrogen (H) is 1.01 g/mol, and oxygen (O) is 16.00 g/mol.
The molar mass of aspirin (C9H8O4) can be calculated by adding the molar masses of each element based on their respective subscripts in the chemical formula:
Molar mass of aspirin = (9 * molar mass of C) + (8 * molar mass of H) + (4 * molar mass of O)
= (9 * 12.01 g/mol) + (8 * 1.01 g/mol) + (4 * 16.00 g/mol)
= 180.15 g/mol
To calculate the mass percent composition of each element, we can use the following formulas:
Mass percent of an element = (molar mass of the element * number of atoms of that element) / molar mass of the compound
Mass percent of C = (12.01 g/mol * 9) / 180.15 g/mol = 60.01%
Mass percent of H = (1.01 g/mol * 8) / 180.15 g/mol = 4.49%
Mass percent of O = (16.00 g/mol * 4) / 180.15 g/mol = 35.51%
Therefore, the mass percent composition of C, H, and O in aspirin is approximately 60.01%, 4.49%, and 35.51%, respectively.