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.

%C = (mass C/total mass)*100 = ?

%H = (mass H/tota mass)*100 = ?
etc.

To calculate the mass percent composition of C, H, and O in aspirin, we will need to know the chemical formula of aspirin, which is C9H8O4.

Step 1: Calculate the molar mass of C, H, and O:
- The molar mass of carbon (C) is 12.01 g/mol.
- The molar mass of hydrogen (H) is 1.01 g/mol.
- The molar mass of oxygen (O) is 16.00 g/mol.

Step 2: Calculate the total molar mass of the compound, aspirin:
(9 atoms of C × 12.01 g/mol) + (8 atoms of H × 1.01 g/mol) + (4 atoms of O × 16.00 g/mol) = 180.16 g/mol

Step 3: Calculate the mass percent composition of each element:
- The mass percent of C = (9 × 12.01 g/mol / 180.16 g/mol) × 100% = 60.00%
- The mass percent of H = (8 × 1.01 g/mol / 180.16 g/mol) × 100% = 4.49%
- The mass percent of O = (4 × 16.00 g/mol / 180.16 g/mol) × 100% = 35.51%

Therefore, the mass percent composition of C, H, and O in aspirin is approximately 60.00%, 4.49%, and 35.51% respectively.

Note: No information was given for the element other than carbon, hydrogen, and oxygen. Hence, we cannot calculate the mass percent composition for any other element (if present) in aspirin.

To calculate the mass percent composition of C, H, and O in aspirin, we first need to determine the molar mass of each element in the compound:

The molar mass of carbon (C) is approximately 12.01 g/mol.
The molar mass of hydrogen (H) is approximately 1.01 g/mol.
The molar mass of oxygen (O) is approximately 16.00 g/mol.

Next, we need to determine the molar mass of the entire aspirin molecule:

The molar mass of aspirin (C9H8O4) is calculated as:
(9 * molar mass of C) + (8 * molar mass of H) + (4 * molar mass of O).

This gives us:
(9 * 12.01 g/mol) + (8 * 1.01 g/mol) + (4 * 16.00 g/mol) = 180.16 g/mol.

Now we can calculate the mass percent composition of each element in aspirin:

The mass percent of C = (mass of C in aspirin / total mass of aspirin) * 100%.
Substituting the values:
(mass of C in aspirin / 180.16 g/mol) * 100%.

Similarly, the mass percent of H = (mass of H in aspirin / total mass of aspirin) * 100%,
And the mass percent of O = (mass of O in aspirin / total mass of aspirin) * 100%.

By substituting the molar mass values and simplifying, we get:
(mass of C in aspirin / 180.16) * 100% = x%
(mass of H in aspirin / 180.16) * 100% = y%
(mass of O in aspirin / 180.16) * 100% = z%

To calculate the actual mass of each element, we need to know the empirical formula of aspirin. This formula is C9H8O4, meaning there are 9 carbon atoms, 8 hydrogen atoms, and 4 oxygen atoms in one molecule of aspirin.

The mass of C in one mole of aspirin is:
9 * molar mass of C = 9 * 12.01 g/mol = 108.09 g.

The mass of H in one mole of aspirin is:
8 * molar mass of H = 8 * 1.01 g/mol = 8.08 g.

The mass of O in one mole of aspirin is:
4 * molar mass of O = 4 * 16.00 g/mol = 64.00 g.

Finally, we can plug these values into the equations for mass percent composition:

(mass of C in aspirin / 180.16) * 100% = (108.09 g / 180.16 g) * 100% = 59.97% (approximately 60%).
(mass of H in aspirin / 180.16) * 100% = (8.08 g / 180.16 g) * 100% = 4.49% (approximately 4.5%).
(mass of O in aspirin / 180.16) * 100% = (64.00 g / 180.16 g) * 100% = 35.54% (approximately 36%).

Therefore, the mass percent composition of C, H, and O in aspirin is approximately 60%, 4.5%, and 36%, respectively.