Which agent causes sand dunes to form?

ocean waves

gravity

the wind carries the sand until it runs into an obstacle

weathering of old rocks in the desert

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature