Match the effects on the concentration of SO3 gas when the following changes occur after initial equilibrium has been established in this system (N. C. = no change). 2SO2(g) + O2(g) 2SO3(g) + 46.8 kcal

pressure increases
(Choices are N. C., increase, and decrease)

increase [O2]
(Choices are N. C., increase, and decrease)

increase volume of chamber
(Choices are N. C., increase, and decrease)

adding a catalyst
(Choices are N. C., increase, and decrease)

raising the temperature
(Choices are N. C., increase, and decrease)

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Determine the mass of the object below with accuracy and to the correct degree of precision. a. 324.2 g b. 324 g c. 324.30 g d. 324.25 g

Two changes are described below. a green banana turns yellow and ripens. a layer of rust forms on an iron nail. which statement is true about the two changes? a) both are chemical changes because new substances are formed. b) both are physical changes because only the physical state of the substances change. c) a is a physical change due to a change of state, but b is a chemical change because new molecules are formed. d) a is a chemical change due to a change of state, but b is a physical change because new molecules are formed.