A tank contain 4liters of Oxygen. The gas temperature is 20oC and the measured pressure is 20 x 105 N/m2. Determine the mass of Oxygen. Given; Patm = 1x105, O = 16, 1dm3 = 1L, R = 8.314 N/mol/K)

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

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