3 Calculate the amount of heat produced when 52.4 g of methane, CH4,
burns in an excess of air, according to the following equation. CH4(g) +
202(g) — CO2(g) + 2H20(1) AH = -890.2 kJ. a) Is the reaction endothermic
or exothermic? b) Is the energy of the reactants greater than or less than
the products? c) How much heat in kJ is produced in the reaction when
52.4 g of methane is burned?

Examine the false statement. compounds are the smallest unit of an element that occur most commonly in nature. select the rewording of the statement that is true. a: atoms are the smallest unit of an element that commonly occur in nature. b: molecules are the smallest unit of an element or compound that commonly occur in nature. c: molecules are the smallest unit of a compound that occur on the periodic table. d: compounds are the smallest unit of an element that occur on the periodic table