Hello,
In English, we say " what time" so we are using two words to say "what time". But in Japanese, we say "何時(なんじ)" which is one word. So when we say " what time", we don't separate "what" and "time".
Don't trust google translate so much. I recommend you to use "jisho" instead or use both!
https://jisho.org/
We don't use "わ” as you used じかんわなんですか。we use は instead. じかんはなんですか。
As David said, It's better to write in Kanji and translate it to English and Google translate gives you much better answers.