An unknown sample required 21.05 ml of 0.02047 m kmno4 to reach the end point. how many moles of kmno4 reacted?

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

What human activity increases beach erosion?

How many grams of mgbr2 are needed to produce 75g or metal?