The different samples of `CO_2` were found to contain carbon and oxygen in the same ratio of their mass. This illustrates

Options

A. law of conservation of mass
B. law of definite proportions
C. law of multiple proportions
D. law of reciprocal proportions

Explanation

To solve the question, we need to understand the concept being illustrated by the observation that different samples of CO₂ contain carbon and oxygen in the same mass ratio. Here’s a step-by-step breakdown:

### Step-by-Step Solution:

1. **Identify the Compounds**: The question mentions the compound CO₂, which is carbon dioxide. It consists of carbon (C) and oxygen (O).

2. **Understand the Composition**: In carbon dioxide (CO₂), there is one carbon atom and two oxygen atoms.

...