[kamodaff]

A 33.0 g iron rod, initially at 22.9 degrees C, is submerged into an unknown mass of water at 62.6 degrees C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 58.6 degrees C. What is the mass of the water?

If you could explain how to do this problem or put a link to a resource with examples like this problem I will greatly appreciate it! Thank you in advance!

[UG]

See if http://www.ausetute.com.au/heatcapa.html helps or not.