25
g of calcium reacts with 42 g of chlorine to produce g of calcium chloride

if you're asking what comes out, it's steam.

b. is the answer hoped i        

i think that the answer is c

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.