In the manufacture of nitric acid, ammonia and preheated air are mixed to form a gas containing 15.0 mole% nh3 at 600°c. after the blending process, the ammonia is catalytically oxidized to form no2, which is absorbed in water to form hno3. if ammonia enters the gas blending unit at 25°c at a rate of 520 kg/h, and heat is lost from the mixer to its surroundings at a rate of 7 kw, determine the temperature to which the air must be preheated. (use the first two terms of the cp equation for air).

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)