Question

What is

-N(nitrogen) H3(hydrogen) chemical reaction
-H2(hydrogen) C(carbon) O3(oxygen) chemical reaction
-H(hydrogen) N(nitrogen) O2(oxygen) chemical reaction
-Na(sodium) O(oxygen) H(hydrogen) chemical reaction
-K(potassium) O(oxygen) H(hydrogen) chemical reaction
(please help me T^T)
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Answer 1

Here are the chemical reactions for the compounds you listed:
-NH3: Nitrogen + 3 Hydrogen -> Ammonia
-H2CO3: Carbon + 3 Oxygen + 2 Hydrogen -> Carbonic Acid
-HNO2: Nitrogen + 2 Oxygen + Hydrogen -> Nitrous Acid
-NaOH: Sodium + Oxygen + Hydrogen -> Sodium Hydroxide
-KOH: Potassium + Oxygen + Hydrogen -> Potassium Hydroxide