What is the total amount of heat required to change 15.75g of H20(s) to H2O(l) at STP?

1) 5,261 J
2) 452,000 J
3) 65.8 J
4) 35,595 J

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Why is nh3 classified as a polar molecule

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids