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**1. Homework Statement**

(c11p34) You pour 160.0 g of hot coffee at 75.0 oC into a 230.0- g glass cup at 24.0 oC. If they come to thermal equilibrium quickly, what is the final temperature (in oC, enter deg in asnwer box)? Assume no heat is lost to the surroundings.

**2. Homework Equations**

(I don't even know, I've seen so many.)

**3. The Attempt at a Solution**

I've attempted this problem a couple times with different formulas, but none have worked.

Can someone just tell me what equation to use, please?