C is a reducing agent, HNO3 is an oxidizing agent.
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Reactants:
C
Names: Carbon black, Acetylene black, Channel black
Appearance: Odourless black pellets or extremely fine powder ; Black, odorless solid.
HNO3 – Nitric acid
Other names: Aqua fortis, Spirit of niter, Eau forte
Appearance: Colorless, yellow or red fuming liquid ; Colourless-to-yellow liquid with pungent odour ; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.]
Products:
CO2
Names: Carbon dioxide, {{plainlist|, CO2
Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
NO – Nitrogen monoxide, Oxidonitrogen(•) (additive)
Other names: Nitric oxide, Nitrogen(II) oxide, Nitric oxide (radical)
Appearance: Colourless gas ; Colourless compressed gas ; Colorless gas. [Note: Shipped as a nonliquefied compressed gas.]
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxide
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas