Which one of these statements is/are true: i. all redox reactions with positive emfs are spontaneous. ii. if a redox reaction is spontaneous, it must be fast. iii. a spontaneous redox reaction will have a cathode reaction that has a more negative reduction potential than the anode.

Afood web shows who eats who in any given habitat. every living thing, from one-celled algae to giant blue whales, needs food to survive. each food web is a possible pathway that energy and matter can follow through the habitat. a food web begins with producers: organisms that convert sunlight into usable chemical energy. the food web is completed by the decomposers who turn organic wastes, such as decaying plants, into inorganic materials, such as nutrient-rich soil. decomposers complete the cycle of life, returning nutrients to the soil or oceans for use by producers. in this food web, identify the decomposer.

Find the area of shaded region z=-0.89

Of the 168 hours in a week as a full time student you should spend how many hours per week on school work?