To calculate the mass of aspirin in grams, we first need to determine the molar mass of aspirin (C9H8O4).
Molar mass of carbon (C) = 12.01 g/mol
Molar mass of hydrogen (H) = 1.01 g/mol
Molar mass of oxygen (O) = 16.00 g/mol
Calculating the molar mass of aspirin:
(9 * Molar mass of carbon) + (8 * Molar mass of hydrogen) + (4 * Molar mass of oxygen)
= (9 * 12.01 g/mol) + (8 * 1.01 g/mol) + (4 * 16.00 g/mol)
= 108.09 g/mol + 8.08 g/mol + 64.00 g/mol
= 180.17 g/mol
Now, we can calculate the mass of the sample using the number of moles given:
Mass of aspirin = Number of moles * Molar mass
= 0.0745 mol * 180.17 g/mol
= 13.395865 g
Rounding the result to the correct number of significant figures, the mass of aspirin in the sample is 13.4 g.
Aspirin, C9H8O4, is a common pain reliever and is also often given in low doses daily for prevention of heart attacks. How many grams of aspirin are present in a sample that contains 0.0745 mol?
13.421473 g
2420 g
13.4 g
0.000414 g
1 answer