A:AnswerNo — you generally can’t use Razer Gold directly to add funds to your Steam Wallet or buy Steam gift cards. Razer Gold is a separate digital credit system used for in-game purchases and supported platforms, but Steam doesn’t officially accept Razer Gold for wallet top-ups right now.
A:AnswerThat's a very common scam don't fall for it. They ask for a card for something usually involves nsfw activities but say it was used and have you get another and most likely will say it was also used and repeating the process until they either just disappear and delete their account or you catch on and block them. Never give the code to anyone you don't know personally as the way to prevent this.