The decomposition of an aldehyde solution in carbon tetrachloride is a first order reaction with a rate constant of 1.20 x 10-3 min-1. If we start with [aldehyde] = 0.0500 molar, what will the concentration be 150 minutes later?
1. 0.00900 M
2. 0.0418 M
3. 0.00926 M
4. 0.00499 M
5. 0.000333 M