Question
Classify the following amines as primary, secondary or tertiary:

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$(\text{C}_2\text{H}_5)_2\text{CHNH}_2$
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$(\text{C}_2\text{H}_5)_2\text{NH}$

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| $A/mol L^{-1}$ | $0.20$ | $0.20$ | $0.40$ |
| $B/mol L^{-1}$ | $0.30$ | $0.10$ | $0.05$ |
| $r_0/mol L^{-1} s^{-1}$ | $5.07 \times 10^{-5}$ | $5.07 \times 10^{-5}$ | $1.43 \times 10^{-4}$ |
