if 21.0 g of potassium reacts with 62.5 g of barium nitride, what mass of potassium nitride will be produced ? pls help need it rn

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?