Write a brief passage about nitrogen 14

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .