Mr. a desired to synthesize c, h.(g) from ch,(g) and o,(g) by using ce 5wt% supported on alo, . he set up a system for running the reaction as follows. the inlet gas system consisted of 20%vol ch,(g) and 80%vol o.. the total feed gas of the inlet was 50 ml/min. the amount of catalyst used was 0.5 g which was equal to 1 ml in volume of the catalyst. the products detected at outlet were 0.4%vol c, h,, 0.8%vol c. h., 0.2%vol c, h, and 0.3%vol c, hs. the life time of the catalyst was 30 days. mr. a also took the catalyst to measure the number of active site by measuring the amount of co, adsorbed on the surface of the catalyst (co- tpd technique). he found that the amount of co, desorbed was 2,000 mmol/g. cat. determine the following values: ch, conversion selectivity of c, h, product rate of the reaction space velocity space time yield of c, h, product turnover frequency of c, h product turnover number of c, h, product note: make any assumption if required.

Many bird species build nests in which they raise their offspring. one of these species is known as the magnolia warbler. breeding pairs of magnolia warblers build nests out of pieces of grass and twigs. the female warbler will then lay her eggs in the nest and sit on the eggs for a few weeks until they hatch. after the offspring have hatched, the female will continue to sit on the newborn chicks to keep them warm. both the male and the female bring food for the offspring to eat until the young are mature enough to find food on their own. which of these most likely describes why birds such as the magnolia warbler build nests in which to raise their offspring? a. nest building decreases the amount of energy used by the parent birds to raise their offspring to adulthood. b. nest building increases the probability that the offspring will survive and eventually produce offspring of their own. c. nest building decreases the amount of food that the offspring require the adult birds to provide. d. nest building increases the probability of the offspring being located by airborne predators.