Hey student made a model of a river in a sandbox a pile of sand represents soil and bits of rocks in the riverbed water pouring from 100% river water as it flows downhill which two characteristics are limitations of the students model

The model is missing plants, fish and other details found in a real river

The model is much smaller then a real river

Explanation:

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.