Which element of H.323 is a device that provides translation between network devices running the H.323 signaling protocols and devices running other types of signaling protocols

H.323 gateway

Explanation:

H. 323 gate way is an optional type of endpoint that provides interoperability between H. 323 endpoints and endpoints located on a Switched Circuit Network (SCN), such as the public switched telephone network (PSTN) or an enterprise voice network.

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.