A student is given 9.15x1015 formula units of ammonium sulfate, (NH4)2SO4, and is asked to determine the number of moles. How many moles are present in this sample? Be sure to round your answer to the correct number of significant figures. (This answer will have to be written in scientific notation. Here is an example with the format you should use to enter in your 2.5x102 = 2.5E2)

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.