Sodium thiosulfate, na 2s 2o 3, is used as a "fixer" in black and white photography. identify the reducing agent in the reaction of thiosulfate with iodine. 2s 2o 3 2–( aq) + i 2( aq) → s 4o 6 2–( aq) + 2i –( aq)

Reducing agent in the given reaction is .

Explanation:

A reducing agent is defined as an element which tends to lose electrons to other element leading to an increase in its oxidation number.

In the given reaction, oxidation state of sulfur in is +2 and has 0 oxidation state.

In oxidation state of S is 2.5 and in oxidation state of I is -1.

Since, an increase in oxidation state of S is occurring from +2 to +2.5. Hence, it is acting as a reducing agent.

Thus, we can conclude that reducing agent in the given reaction is .

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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