To find the 2's complement of the number stored at memory location 8000H and store the complemented number at memory location 8050H, you can use the command "CMA" to take the 1's complement of the number and then add 1 to it using the "ADI" command. The resulting number can then be stored at memory location 8050H using the "STA" command. The code for this operation would be:
LDA 8000H
CMA
ADI 01H
STA 8050H