A piece of Al (sp. heat=0.9 j/goC) with a mass of 55 g is heated and placed into 45mL of water at 18oC. The final temperature of metal and water was found to be 22oC. Then what was the initial temperature of metal?

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

How many molecules are found in 1.32 mol of nacl?

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent