
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Over the heated powder (X1), hydrogen was passed. The obtained red-colored substance (X2) was dissolved in concentrated sulfuric acid. The resulting blue-colored solution (X3) was neutralized with potassium hydroxide, forming a blue precipitate (X4), which turned back into the black powder (X1) upon heating. Identify the substances involved in the described process. Indicate the molar mass of the initial and resultant substance (X1).

Present the answer in LaTex format: \boxed{Your answer}
user