[needy]

It has been a few years since I did physcial chemistry and I need some help. Here is the question.
A cube of iron was heated to 70C and transferred to a beaker containing 100 g of water at 20C. The final temperature of the water and the iron was 23C What is a) the heat capacity b) the specific heat capacity and c) the molar heat capacity of the iron cube? Ignore heat losses from the assembly.

I can't even figure out a). I assume the question wants heat capacity of the iron, but how can I figure it out with out the mass?

[Borek]

If iron mass is not given, there is no way to solve b and c. a is not that difficult - heat capacity of a given object is just q/delta T.