"the combustion of ethylene proceeds by the reaction c2h4(g) + 3o2(g) → 2co2(g) + 2h2o(g) when the rate of disappearance of o2 is 0.23 m s-1, the rate of disappearance of c2h4 is m s-1."

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

Which of the following is not an assumption that scientists must make about the natural world? a. regularity b. causality c. predictability d. plausibility

In a 28 g serving of cheese curls there are 247mg of sodium. how much sodium is in a 12.5 ounce bag