Probably, the yellow color is due to sulfur deposits on the walls and the metallic deposits are magnesium metal. Sor the word equation is
magnesium sulfide + heat ==> magnesium + sulfur.
Now you turn that into a symbol equation.
What is the chemical equation, name, and formula for the follwing?
"When strongly heated, magnesium sulfide formed a yellow crystalline deposit on the walls of a sealed reaction vessel. Metallic deposits were found on the bottom of the container"
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