Determine the spin-spin splitting pattern and the number of protons that contribute to the integrated 1H NMR signal for the hydrogens in 2-nitropropane. Place the splitting pattern for the hydrogen atom in the targets labeled "Splitting pattern." For example, if the signal has three peaks, place triplet in the target. Place the number of protons that the group contributes to the integrated signal in the targets labeled "Proton number." For example, if the signal is created by two hydrogen atoms on a carbon atom, place two in the target.