In the following reaction, rate constant is `1.2 xx 10^(–2)" Ms"^(–1) A rarr B`. What is concentration of B after 10 and 20 min., if we start with 10 M of A.

Explanation

To solve the problem, we will use the concept of zero-order kinetics, as indicated by the units of the rate constant. The reaction is given as:

\[ A \rightarrow B \]

### Step-by-Step Solution:

1. **Identify the given data:**
- Rate constant \( k = 1.2 \times 10^{-2} \, \text{M/s} \)
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