Baking powder = sodium bicarbonate + weak solid acid (usually tartaric acid or cream of tartar). On moistening, they react to produce CO₂, causing dough to rise without requiring external acidic ingredient.
Explanation:
Hydrogen peroxide decomposes into water and oxygen. A single reactant breaks down into two or more products, so it is a decomposition reaction. This particular reaction can be catalyzed by MnO₂ or light. It is also a disproportionation redox reaction where O in H₂O₂ (-1) goes to -2 in H₂O and 0 in O₂.
Explanation:
Hydrogen has about 141.9 kJ/g, the highest of any fuel. Methane ~55.5 kJ/g, coal ~25-35 kJ/g, wood ~17 kJ/g. Hydrogen produces only water on combustion, making it a clean fuel.
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