A sample was collected and analyzed. If there are only three gasses present, the total pressure of the sample is 194.66 kPa, the pressure of N2 is 73.01 kPa and the pressure of O2 is 7.39 kPa, what is the pressure of F2 in kPa?​

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

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.

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %