Calculate the number of molecules in .0673 grams of Li2CO3

The reaction q+r2=r2q is found to be first order in r2 and

50 pts plz what is the physical state of matter of baking soda.

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?