Learn Russian: У нас нет ведра, поэтому носить грибы в руках тяжело. - We don't have a bucket, so carrying mushrooms in our hands is hard.

The verb носить is the multidirectional verb for carrying things on foot. Here it is used because carrying mushrooms around the forest is a general process or a wandering action without a single specific destination. If you were carrying them in one specific direction (like straight back to your car), you would use нести.

Why is the word for bucket ведра instead of ведро?

In Russian, when you state that you do not have something using у нас нет, the thing you are missing must be in the genitive case. The dictionary form is the neuter noun ведро, which changes to ведра in the genitive.

Why does в руках end in -ах?

This is the prepositional plural form. The preposition в (in) requires the prepositional case to show location. Since you are carrying the mushrooms in both hands, the singular рука (hand) becomes the plural руках.

Why is the word for hard тяжело instead of an adjective like тяжелый?

Because the sentence is describing an action (carrying) rather than modifying a specific noun, Russian uses the impersonal adverb form ending in -о. You use this same pattern for other general states, like saying it is cold (холодно) or it is easy (легко).