Why are allergic reactions often

referred to as inappropriate

responses of the immune system?

The reaction 4 a + c + h → d has the mechanism below. what is the rate law? 1) 2 a → b fast 2) 2 b → b2 fast 3) b2 + c → g slow 4) g + h → d fast a. rate = k[a]2[c] b. rate = k[a]4[h][c] c. rate = k[a]2 d. rate = k[b]2[c] e. rate = k[a]4[c]

Which one of these is an example of a chemical change.? A - water evaporating from a puddle B - cloth tearing when pulled C - wood forming sawdust when cut D - bread baking in an oven

Question #21TrueFalse The general name for a substance added to a reaction that affects the rate but is not consumed in the reaction is called a complex a. True b. False

What is acid rain and how is it a problem to oceans, rivers, lakes, ponds, and ect.

How many moles of gas are there in a 45.0 l container at 25.0°c and 500.0 mm hg?

Which of the following is an extensive physical property of matter? volume viscosity odor density

When is Ksp determined for a system?

What is the average surface temperature of Uranus

Consider the following statements. A. Molecules of hot water have less kinetic energy than those of cold water. B. For most solids, solubility increases when temperature increases. C.

Which describes the fourth state of matter known as plasma? A It is a liquid containing nuclei and electrons. B It is a gas containing nuclei and electrons. C It is a liquid containing electrons created by fusion.