What must be known for the rate constant to be calculated from rate law a. the reaction rate at the known product concentrations
b. the temperature at the beginning of the reaction
c. the activation energy the reaction must overcome
d. the reaction rate at known reactant concentrations

What substance has a mass of 9.5g and volume of 2.1cm^3

How does the motion of particles in a gas change as the gas cools

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.