Consider the reaction, CH4 + 2 O2 → CO2 + 2 H2O. The number of grams of water formed when 32 g of methane are burned is: 20 g b. 36 g c. 45 g d. 72 g e. 81 g

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The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What is the most common reason for matter changing its state?