"How much rice is it?"

Translation: Mennyi rizs ez?

[tubaeuphalex]

Why not, "Mennyi rizs van?"

[vvsey]

Because that would be "How much rice is there?"

[Bastette54]

So should this be translated to "How much rice is this?"

[vvsey]

Yes, I think so.

[Krisbaudi]

Mennyi a risz - was also wrong. Maybe it means: How much is the rice.

[iRBiS]

Exactly. Mennyi a rizs?

It literally means "How much is the rice?" (including both meanings). However, this is not the same as either...

• Mennyi ez a rizs? = "How much is this rice?"
• Mennyi rizs ez? = "How much rice is this?"

It's about whether you want 'rice' or 'this' to be the subject

In the Duolingo sentence, it's clearly 'it,' so you must not let 'rizs' become your new subject.

[JimmRepp]

Couldn't it also be "Mennyi rizs az?'?