Which of the following reactions would have a decrease in entropy? A. 2H2O(g) → 2H2(g) + O2(9)
B. 250(9) ► 2802(g) + O2(9)
C. 2N02() ► N,04(9)
D. 2NH3(g) → N2(g) + 3H2(9)

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

What material does not melt at any temperature

How have the greenhouse gasses increased from the year 2000 to 2018