A 2.1-g sample of carbon dioxide (CO2) is fully decomposed into its elements, yielding 0.573 g of carbon and 1.53 g of oxygen.

1. What is the ratio of the mass of O to C ? Express your answer to three significant figures.

2. If a sample of a different compound decomposes into 0.429 g of carbon and 0.571 g of oxygen, what is its ratio of the mass of O to C ? Express your answer to three significant figures.

3. According to Dalton’s atomic theory, what is the empirical formula of the second compound?
A) C2O3
B)C2O
C)CO