3. What is AH for the reaction of sulfur dioxide with oxygen? 2502(g) + O2(g) - 2503(g)
(AH 502(g) = -296.8 kJ/mol; AH, 503(g) = -395.7 kJ/mol)
197.8 kJ
-197.8 kJ
-98.9 kJ
1.385 x 103 kJ

Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream? the ability to attract prey by glowingextra gills, for oxygen extractionthe ability to grow largerextra fat, for warmth

Use this dichotomous key for insect identification to identify the insect shown. 1. a. insect has one pair of wings. order diptera b. insect has two pairs of wings. go to #2 2. a. front wings thicker in texture than hind wings go to #3. b. front and hind wings are same texture throughout. go to #4 3. a. front wings are short order dermaptera b. front wings cover entire abdomen order coleoptera 4. a. wings with scale on all parts of their area. order lepidoptera b. wings without scales go to #5. 5. a. hind wings smaller than front wings. order ephemeroptera b. front and hind wings nearly equal in size. order odonata the insect pictured is in the order diptera. ephemeroptera. coleoptera. odonata.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above