(a) Calculate the pH of 8.50 3 1025 m and 7.37 3 1026 m HCN(aq), ignoring the effect of the autoprotolysis of water. (b) Repeat the calculations, taking into account the autoprotolysis of water.

What is the independent variable in this investigation? mass volume sample number substance density

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.

Isopropyl alcohol, (ch3)2choh, is a common solvent. determine the percent by mass of hydrogen in isopropyl alcohol. a) 6.71% h b) 13.4% h c) 25.0% h d) 53.3% h