Doulingo will also accept: How much water does this coffee have?
This is a great sentence. There's too much water in American coffee
"How much water do you have in that coffee?" possible?
(-> "tem" would be used as "você tem" in that case)
That's highly unusual.
With "tens", however, it would be ok. We avoid omitting the subject when there is ambiguity, specially this kind of ambiguity where "ter" means "there be".
Would "Quanta agua ha nesse cafe?" also be acceptable?
Yes, it is also right.
Quanta água tem nesse café ? The audio is incorrect
What about 'how much water heve in that coffee'?????
"How much of water is in that coffee" was marked wrong 2018 05 25
That's because it's wrong in English.