Question 4. (10 pts) In a cryogenic experiment, oxygen gas is confined to a 2-dimensional surface at a temperature of 60 K. The oxygen molecule can rotate in the plane of the 2-dimensional surface but not in any other orientation. If the oxygen gas desorbs into the gas phase from the surface at the standard boiling point of oxygen, which is 90 K, how much energy is required to heat 1 micromole (10-6 mol) to the desorption temperature

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

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

Match the formula for the following compound:   magnesium sulfate heptahydratemgs·7h2omg2so4·7h2omg(so4)2·7h2omgso4·7h2o