Write a balanced equation for the reaction of gaseous carbon monoxide with hydrogen gas to form gaseous methane (CH4) and liquid water.
Solution:
If the question says solid, we need to write (s) next to the compound, liquid means (l), gaseous means (g) and aqueous means (aq). Gaseous carbon monoxide is CO(g). Gaseous hydrogen is H2(g). Hydrogen is a diatomic gas and that is why it has a subscript of 2. You can memorize all the diatomic gases with BrINCl HOF mnemonic. Liquid water is H2O(l).
The equation is: CO(g) + H2(g) —> CH4(g) + H2O(l)
Now lets balance it : CO(g) + 3H2(g) —> CH4(g) + H2O(l)
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