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4. (2 points). Raising the concentrations of the reactants will increase or decrease the rate of a reaction? increase b. decrease 5. (2 points) When natural gas (predominantly methane, CH4) burns in air. The following reaction occurs. How much energy is involved in the combustion of 12.5 g of methane? The atomic weight of carbon is 12.01 g, hydrogen is 1.01 g. CH + 20 17.0 kcal 13,02 CO + 2 HO AH213 kcal a. 0 kcal l6 4 8 c. 166 kcal d. 0.941 kcal l.S
4. (2 points). Raising the concentrations of the reactants will increase or decrease the rate of a reaction? increase b. decrease 5. (2 points) When natural gas (predominantly methane, CH4) burns in air. The following reaction occurs. How much energy is involved in the combustion of 12.5 g of methane? The atomic weight of carbon is 12.01 g, hydrogen is 1.01 g. CH + 20 17.0 kcal 13,02 CO + 2 HO AH213 kcal a. 0 kcal l6 4 8 c. 166 kcal d. 0.941 kcal l.S
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