YOU SAID:
Have you got the white powder
INTO JAPANESE
あなたは白い粉を持っていますか?
BACK INTO ENGLISH
Do you have white powder?
INTO JAPANESE
白い粉がありますか?
BACK INTO ENGLISH
Is there a white powder?
INTO JAPANESE
白い粉はありますか?
BACK INTO ENGLISH
Is there a white powder?
That didn't even make that much sense in English.